[Kernel-packages] [Bug 1469579] Re: kernel crash when doing `rm -rf /root`
derek, this bug report is being closed due to your last comment
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469579/comments/7
regarding this being fixed with an update. For future reference you can
manage the status of your own bugs by clicking on the current status in
the yellow line and then choosing a new status in the revealed drop down
box. You can learn more about bug statuses at
https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time
to report this bug and helping to make Ubuntu better. Please submit any
future bugs you may find.
** Changed in: linux (Ubuntu)
Status: Incomplete = Invalid
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https://bugs.launchpad.net/bugs/1469579
Title:
kernel crash when doing `rm -rf /root`
Status in linux package in Ubuntu:
Invalid
Bug description:
to make a persistent /root, I'd usually like to rm -rf /root and make it a
symlink to somewhere on the harddrive, when I run with the Ubuntu Studio 15.10
(Wily Werewolf) Daily Build, it just crashed the kernel, this crash didn't
happen of my last visit ubuntu14.10
http://cdimages.ubuntu.com/ubuntustudio/dvd/current/ (current is
28-Jun-2015 as the time now)
then I can reproduce this within VM, with Ubuntu 15.10 daily build
(current is 09-Jun-2015), from serial console I run strace \rm -rvf
/root and see kernel panic messages:
root@ubuntu-studio:~# cd /
root@ubuntu-studio:/# strace \rm -rvf /root echo true
execve(/bin/rm, [rm, -rvf, /root], [/* 19 vars */]) = 0
brk(0) = 0x209
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e4000
access(/etc/ld.so.preload, R_OK) = -1 ENOENT (No such file or
directory)
open(/etc/ld.so.cache, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=123268, ...}) = 0
mmap(NULL, 123268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f91151c5000
close(3)= 0
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
open(/lib/x86_64-linux-gnu/libc.so.6, O_RDONLY|O_CLOEXEC) = 3
read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\0\1\0\0\0`\v\2\0\0\0\0\0...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f9114bf9000
mprotect(0x7f9114db9000, 2097152, PROT_NONE) = 0
mmap(0x7f9114fb9000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c) = 0x7f9114fb9000
mmap(0x7f9114fbf000, 16128, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9114fbf000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c4000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c3000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c2000
arch_prctl(ARCH_SET_FS, 0x7f91151c3700) = 0
mprotect(0x7f9114fb9000, 16384, PROT_READ) = 0
mprotect(0x60d000, 4096, PROT_READ) = 0
mprotect(0x7f91151e6000, 4096, PROT_READ) = 0
munmap(0x7f91151c5000, 123268) = 0
brk(0) = 0x209
brk(0x20b1000) = 0x20b1000
open(/usr/lib/locale/locale-archive, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2919792, ...}) = 0
mmap(NULL, 2919792, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f911493
close(3)= 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B9600 opost isig icanon echo ...}) = 0
lstat(/, {st_mode=S_IFDIR|0755, st_size=260, ...}) = 0
newfstatat(AT_FDCWD, /root, {st_mode=S_IFDIR|0700, st_size=60, ...},
AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
close(3)= 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fcntl(3, F_DUPFD, 3)= 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
getdents(3, /* 0 entries */,
[Kernel-packages] [Bug 1469579] Re: kernel crash when doing `rm -rf /root`
I have the Ubuntu Mate Daily Live 20150716 image is good, doesn't have this
problem anymore.
http://cdimages.ubuntu.com/ubuntu-mate/daily-live/20150716/
root@ubuntu-mate:~# uname -a
Linux ubuntu-mate 4.0.0-4-generic #6-Ubuntu SMP Tue Jun 30 20:49:28 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
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https://bugs.launchpad.net/bugs/1469579
Title:
kernel crash when doing `rm -rf /root`
Status in linux package in Ubuntu:
Incomplete
Bug description:
to make a persistent /root, I'd usually like to rm -rf /root and make it a
symlink to somewhere on the harddrive, when I run with the Ubuntu Studio 15.10
(Wily Werewolf) Daily Build, it just crashed the kernel, this crash didn't
happen of my last visit ubuntu14.10
http://cdimages.ubuntu.com/ubuntustudio/dvd/current/ (current is
28-Jun-2015 as the time now)
then I can reproduce this within VM, with Ubuntu 15.10 daily build
(current is 09-Jun-2015), from serial console I run strace \rm -rvf
/root and see kernel panic messages:
root@ubuntu-studio:~# cd /
root@ubuntu-studio:/# strace \rm -rvf /root echo true
execve(/bin/rm, [rm, -rvf, /root], [/* 19 vars */]) = 0
brk(0) = 0x209
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e4000
access(/etc/ld.so.preload, R_OK) = -1 ENOENT (No such file or
directory)
open(/etc/ld.so.cache, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=123268, ...}) = 0
mmap(NULL, 123268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f91151c5000
close(3)= 0
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
open(/lib/x86_64-linux-gnu/libc.so.6, O_RDONLY|O_CLOEXEC) = 3
read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\0\1\0\0\0`\v\2\0\0\0\0\0...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f9114bf9000
mprotect(0x7f9114db9000, 2097152, PROT_NONE) = 0
mmap(0x7f9114fb9000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c) = 0x7f9114fb9000
mmap(0x7f9114fbf000, 16128, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9114fbf000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c4000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c3000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c2000
arch_prctl(ARCH_SET_FS, 0x7f91151c3700) = 0
mprotect(0x7f9114fb9000, 16384, PROT_READ) = 0
mprotect(0x60d000, 4096, PROT_READ) = 0
mprotect(0x7f91151e6000, 4096, PROT_READ) = 0
munmap(0x7f91151c5000, 123268) = 0
brk(0) = 0x209
brk(0x20b1000) = 0x20b1000
open(/usr/lib/locale/locale-archive, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2919792, ...}) = 0
mmap(NULL, 2919792, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f911493
close(3)= 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B9600 opost isig icanon echo ...}) = 0
lstat(/, {st_mode=S_IFDIR|0755, st_size=260, ...}) = 0
newfstatat(AT_FDCWD, /root, {st_mode=S_IFDIR|0700, st_size=60, ...},
AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
close(3)= 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fcntl(3, F_DUPFD, 3)= 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
getdents(3, /* 0 entries */, 32768) = 0
close(3)= 0
unlinkat(4, .bashrc, 0) = 0
open(/usr/share/locale/locale.alias, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e3000
read(3, # Locale
[Kernel-packages] [Bug 1469579] Re: kernel crash when doing `rm -rf /root`
derek, the next step is to fully reverse commit bisect from kernel 3.19
to 4.1 in order to identify the last bad commit, followed immediately by
the first good one. Once this commit has been identified, then it may be
reviewed as a candidate for backporting into your release. Could you
please do this following
https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F
?
Please note, finding adjacent kernel versions is not fully commit
bisecting.
Thank you for your understanding.
Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs
** Tags added: kernel-fixed-upstream-4.1 needs-reverse-bisect
** Changed in: linux (Ubuntu)
Status: Confirmed = Incomplete
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https://bugs.launchpad.net/bugs/1469579
Title:
kernel crash when doing `rm -rf /root`
Status in linux package in Ubuntu:
Incomplete
Bug description:
to make a persistent /root, I'd usually like to rm -rf /root and make it a
symlink to somewhere on the harddrive, when I run with the Ubuntu Studio 15.10
(Wily Werewolf) Daily Build, it just crashed the kernel, this crash didn't
happen of my last visit ubuntu14.10
http://cdimages.ubuntu.com/ubuntustudio/dvd/current/ (current is
28-Jun-2015 as the time now)
then I can reproduce this within VM, with Ubuntu 15.10 daily build
(current is 09-Jun-2015), from serial console I run strace \rm -rvf
/root and see kernel panic messages:
root@ubuntu-studio:~# cd /
root@ubuntu-studio:/# strace \rm -rvf /root echo true
execve(/bin/rm, [rm, -rvf, /root], [/* 19 vars */]) = 0
brk(0) = 0x209
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e4000
access(/etc/ld.so.preload, R_OK) = -1 ENOENT (No such file or
directory)
open(/etc/ld.so.cache, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=123268, ...}) = 0
mmap(NULL, 123268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f91151c5000
close(3)= 0
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
open(/lib/x86_64-linux-gnu/libc.so.6, O_RDONLY|O_CLOEXEC) = 3
read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\0\1\0\0\0`\v\2\0\0\0\0\0...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f9114bf9000
mprotect(0x7f9114db9000, 2097152, PROT_NONE) = 0
mmap(0x7f9114fb9000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c) = 0x7f9114fb9000
mmap(0x7f9114fbf000, 16128, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9114fbf000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c4000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c3000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c2000
arch_prctl(ARCH_SET_FS, 0x7f91151c3700) = 0
mprotect(0x7f9114fb9000, 16384, PROT_READ) = 0
mprotect(0x60d000, 4096, PROT_READ) = 0
mprotect(0x7f91151e6000, 4096, PROT_READ) = 0
munmap(0x7f91151c5000, 123268) = 0
brk(0) = 0x209
brk(0x20b1000) = 0x20b1000
open(/usr/lib/locale/locale-archive, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2919792, ...}) = 0
mmap(NULL, 2919792, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f911493
close(3)= 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B9600 opost isig icanon echo ...}) = 0
lstat(/, {st_mode=S_IFDIR|0755, st_size=260, ...}) = 0
newfstatat(AT_FDCWD, /root, {st_mode=S_IFDIR|0700, st_size=60, ...},
AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
close(3)= 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fcntl(3, F_DUPFD, 3)= 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC)
[Kernel-packages] [Bug 1469579] Re: kernel crash when doing `rm -rf /root`
** Changed in: linux (Ubuntu)
Status: Incomplete = Opinion
** Changed in: linux (Ubuntu)
Status: Opinion = Confirmed
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https://bugs.launchpad.net/bugs/1469579
Title:
kernel crash when doing `rm -rf /root`
Status in linux package in Ubuntu:
Confirmed
Bug description:
to make a persistent /root, I'd usually like to rm -rf /root and make it a
symlink to somewhere on the harddrive, when I run with the Ubuntu Studio 15.10
(Wily Werewolf) Daily Build, it just crashed the kernel, this crash didn't
happen of my last visit ubuntu14.10
http://cdimages.ubuntu.com/ubuntustudio/dvd/current/ (current is
28-Jun-2015 as the time now)
then I can reproduce this within VM, with Ubuntu 15.10 daily build
(current is 09-Jun-2015), from serial console I run strace \rm -rvf
/root and see kernel panic messages:
root@ubuntu-studio:~# cd /
root@ubuntu-studio:/# strace \rm -rvf /root echo true
execve(/bin/rm, [rm, -rvf, /root], [/* 19 vars */]) = 0
brk(0) = 0x209
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e4000
access(/etc/ld.so.preload, R_OK) = -1 ENOENT (No such file or
directory)
open(/etc/ld.so.cache, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=123268, ...}) = 0
mmap(NULL, 123268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f91151c5000
close(3)= 0
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
open(/lib/x86_64-linux-gnu/libc.so.6, O_RDONLY|O_CLOEXEC) = 3
read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\0\1\0\0\0`\v\2\0\0\0\0\0...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f9114bf9000
mprotect(0x7f9114db9000, 2097152, PROT_NONE) = 0
mmap(0x7f9114fb9000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c) = 0x7f9114fb9000
mmap(0x7f9114fbf000, 16128, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9114fbf000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c4000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c3000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c2000
arch_prctl(ARCH_SET_FS, 0x7f91151c3700) = 0
mprotect(0x7f9114fb9000, 16384, PROT_READ) = 0
mprotect(0x60d000, 4096, PROT_READ) = 0
mprotect(0x7f91151e6000, 4096, PROT_READ) = 0
munmap(0x7f91151c5000, 123268) = 0
brk(0) = 0x209
brk(0x20b1000) = 0x20b1000
open(/usr/lib/locale/locale-archive, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2919792, ...}) = 0
mmap(NULL, 2919792, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f911493
close(3)= 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B9600 opost isig icanon echo ...}) = 0
lstat(/, {st_mode=S_IFDIR|0755, st_size=260, ...}) = 0
newfstatat(AT_FDCWD, /root, {st_mode=S_IFDIR|0700, st_size=60, ...},
AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
close(3)= 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fcntl(3, F_DUPFD, 3)= 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
getdents(3, /* 0 entries */, 32768) = 0
close(3)= 0
unlinkat(4, .bashrc, 0) = 0
open(/usr/share/locale/locale.alias, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e3000
read(3, # Locale name alias data base.\n#..., 1024) = 1024
read(3, entries are case independent.\n\n..., 1024) = 1024
read(3, R\nko_KR\t\tko_KR.eucKR\nlithuanian ..., 1024) =
[Kernel-packages] [Bug 1469579] Re: kernel crash when doing `rm -rf /root`
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.1 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as
Confirmed.
Thanks in advance.
[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-unstable/
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
** Changed in: linux (Ubuntu)
Status: Confirmed = Incomplete
--
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https://bugs.launchpad.net/bugs/1469579
Title:
kernel crash when doing `rm -rf /root`
Status in linux package in Ubuntu:
Incomplete
Bug description:
to make a persistent /root, I'd usually like to rm -rf /root and make it a
symlink to somewhere on the harddrive, when I run with the Ubuntu Studio 15.10
(Wily Werewolf) Daily Build, it just crashed the kernel, this crash didn't
happen of my last visit ubuntu14.10
http://cdimages.ubuntu.com/ubuntustudio/dvd/current/ (current is
28-Jun-2015 as the time now)
then I can reproduce this within VM, with Ubuntu 15.10 daily build
(current is 09-Jun-2015), from serial console I run strace \rm -rvf
/root and see kernel panic messages:
root@ubuntu-studio:~# cd /
root@ubuntu-studio:/# strace \rm -rvf /root echo true
execve(/bin/rm, [rm, -rvf, /root], [/* 19 vars */]) = 0
brk(0) = 0x209
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e4000
access(/etc/ld.so.preload, R_OK) = -1 ENOENT (No such file or
directory)
open(/etc/ld.so.cache, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=123268, ...}) = 0
mmap(NULL, 123268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f91151c5000
close(3)= 0
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
open(/lib/x86_64-linux-gnu/libc.so.6, O_RDONLY|O_CLOEXEC) = 3
read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\0\1\0\0\0`\v\2\0\0\0\0\0...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f9114bf9000
mprotect(0x7f9114db9000, 2097152, PROT_NONE) = 0
mmap(0x7f9114fb9000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c) = 0x7f9114fb9000
mmap(0x7f9114fbf000, 16128, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9114fbf000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c4000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c3000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c2000
arch_prctl(ARCH_SET_FS, 0x7f91151c3700) = 0
mprotect(0x7f9114fb9000, 16384, PROT_READ) = 0
mprotect(0x60d000, 4096, PROT_READ) = 0
mprotect(0x7f91151e6000, 4096, PROT_READ) = 0
munmap(0x7f91151c5000, 123268) = 0
brk(0) = 0x209
brk(0x20b1000) = 0x20b1000
open(/usr/lib/locale/locale-archive, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2919792, ...}) = 0
mmap(NULL, 2919792, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f911493
close(3)= 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B9600 opost isig icanon echo ...}) = 0
lstat(/, {st_mode=S_IFDIR|0755, st_size=260, ...}) = 0
newfstatat(AT_FDCWD, /root, {st_mode=S_IFDIR|0700, st_size=60, ...},
AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
close(3)= 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fcntl(3, F_DUPFD, 3)= 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
[Kernel-packages] [Bug 1469579] Re: kernel crash when doing `rm -rf /root`
Tested upstream v4.1.1 doesn't have this problem; kernel-fixed-upstream
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1.1-unstable/
[ ] linux-image-4.1.1-040101-lowlatency_4.1.1-040101.201506291635_amd64.deb
29-Jun-2015 20:58 53M
root@ubuntu-studio:~# uname -a
Linux ubuntu-studio 4.1.1-040101-lowlatency #201506291635 SMP PREEMPT Mon Jun
29 20:45:44 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
root@ubuntu-studio:~#
root@ubuntu-studio:~#
root@ubuntu-studio:~# strace \rm -rvf /root echo removed /root
execve(/bin/rm, [rm, -rvf, /root], [/* 19 vars */]) = 0
brk(0) = 0x1494000
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f47669e3000
access(/etc/ld.so.preload, R_OK) = -1 ENOENT (No such file or directory)
open(/etc/ld.so.cache, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=123268, ...}) = 0
mmap(NULL, 123268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f47669c4000
close(3)= 0
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or directory)
open(/lib/x86_64-linux-gnu/libc.so.6, O_RDONLY|O_CLOEXEC) = 3
read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\0\1\0\0\0`\v\2\0\0\0\0\0...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f47663f8000
mprotect(0x7f47665b8000, 2097152, PROT_NONE) = 0
mmap(0x7f47667b8000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c) = 0x7f47667b8000
mmap(0x7f47667be000, 16128, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f47667be000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f47669c3000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f47669c2000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f47669c1000
arch_prctl(ARCH_SET_FS, 0x7f47669c2700) = 0
mprotect(0x7f47667b8000, 16384, PROT_READ) = 0
mprotect(0x60d000, 4096, PROT_READ) = 0
mprotect(0x7f47669e5000, 4096, PROT_READ) = 0
munmap(0x7f47669c4000, 123268) = 0
brk(0) = 0x1494000
brk(0x14b5000) = 0x14b5000
open(/usr/lib/locale/locale-archive, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2919792, ...}) = 0
mmap(NULL, 2919792, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f476612f000
close(3)= 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B9600
opost isig icanon echo ...}) = 0
lstat(/, {st_mode=S_IFDIR|0755, st_size=240, ...}) = 0
newfstatat(AT_FDCWD, /root, {st_mode=S_IFDIR|0700, st_size=46, ...},
AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, /root, O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW)
= 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=46, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 4 entries */, 32768) = 112
close(3)= 0
openat(AT_FDCWD, /root, O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW)
= 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFDIR|0700, st_size=46, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fcntl(3, F_DUPFD, 3)= 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 4 entries */, 32768) = 112
getdents(3, /* 0 entries */, 32768) = 0
close(3)= 0
unlinkat(4, .bashrc, 0) = 0
open(/usr/share/locale/locale.alias, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2570, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f47669e2000
read(3, # Locale name alias data base.\n#..., 1024) = 1024
read(3, entries are case independent.\n\n..., 1024) = 1024
read(3, R\nko_KR\t\tko_KR.eucKR\nlithuanian ..., 1024) = 522
read(3, , 1024) = 0
close(3)= 0
munmap(0x7f47669e2000, 4096)= 0
open(/usr/share/locale/en_US.UTF-8/LC_MESSAGES/coreutils.mo, O_RDONLY) = -1
ENOENT (No such file or directory)
open(/usr/share/locale/en_US.utf8/LC_MESSAGES/coreutils.mo, O_RDONLY) = -1
ENOENT (No such file or directory)
open(/usr/share/locale/en_US/LC_MESSAGES/coreutils.mo, O_RDONLY) = -1 ENOENT
(No such file or directory)
open(/usr/share/locale/en.UTF-8/LC_MESSAGES/coreutils.mo, O_RDONLY) = -1
ENOENT (No such file or directory)
open(/usr/share/locale/en.utf8/LC_MESSAGES/coreutils.mo, O_RDONLY) = -1
ENOENT (No
[Kernel-packages] [Bug 1469579] Re: kernel crash when doing `rm -rf /root`
this looks like a bug of overlay fs, when /root only exists in underlying rofs
and not exist in upper writable layer, what will happen if remove the dir from
the combined mount?
please let me know what else I can do to narrow down this kernel bug.
** Attachment removed: WifiSyslog.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469579/+attachment/4421683/+files/WifiSyslog.txt
** Attachment removed: JournalErrors.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469579/+attachment/4421673/+files/JournalErrors.txt
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1469579
Title:
kernel crash when doing `rm -rf /root`
Status in linux package in Ubuntu:
Confirmed
Bug description:
to make a persistent /root, I'd usually like to rm -rf /root and make it a
symlink to somewhere on the harddrive, when I run with the Ubuntu Studio 15.10
(Wily Werewolf) Daily Build, it just crashed the kernel, this crash didn't
happen of my last visit ubuntu14.10
http://cdimages.ubuntu.com/ubuntustudio/dvd/current/ (current is
28-Jun-2015 as the time now)
then I can reproduce this within VM, with Ubuntu 15.10 daily build
(current is 09-Jun-2015), from serial console I run strace \rm -rvf
/root and see kernel panic messages:
root@ubuntu-studio:~# cd /
root@ubuntu-studio:/# strace \rm -rvf /root echo true
execve(/bin/rm, [rm, -rvf, /root], [/* 19 vars */]) = 0
brk(0) = 0x209
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151e4000
access(/etc/ld.so.preload, R_OK) = -1 ENOENT (No such file or
directory)
open(/etc/ld.so.cache, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=123268, ...}) = 0
mmap(NULL, 123268, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f91151c5000
close(3)= 0
access(/etc/ld.so.nohwcap, F_OK) = -1 ENOENT (No such file or
directory)
open(/lib/x86_64-linux-gnu/libc.so.6, O_RDONLY|O_CLOEXEC) = 3
read(3, \177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\0\1\0\0\0`\v\2\0\0\0\0\0...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f9114bf9000
mprotect(0x7f9114db9000, 2097152, PROT_NONE) = 0
mmap(0x7f9114fb9000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c) = 0x7f9114fb9000
mmap(0x7f9114fbf000, 16128, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9114fbf000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c4000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c3000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f91151c2000
arch_prctl(ARCH_SET_FS, 0x7f91151c3700) = 0
mprotect(0x7f9114fb9000, 16384, PROT_READ) = 0
mprotect(0x60d000, 4096, PROT_READ) = 0
mprotect(0x7f91151e6000, 4096, PROT_READ) = 0
munmap(0x7f91151c5000, 123268) = 0
brk(0) = 0x209
brk(0x20b1000) = 0x20b1000
open(/usr/lib/locale/locale-archive, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2919792, ...}) = 0
mmap(NULL, 2919792, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f911493
close(3)= 0
ioctl(0, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B9600 opost isig icanon echo ...}) = 0
lstat(/, {st_mode=S_IFDIR|0755, st_size=260, ...}) = 0
newfstatat(AT_FDCWD, /root, {st_mode=S_IFDIR|0700, st_size=60, ...},
AT_SYMLINK_NOFOLLOW) = 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
close(3)= 0
openat(AT_FDCWD, /root,
O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3
fcntl(3, F_GETFD) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fstat(3, {st_mode=S_IFDIR|0700, st_size=60, ...}) = 0
fcntl(3, F_GETFL) = 0x38800 (flags
O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
fcntl(3, F_DUPFD, 3)= 4
fcntl(4, F_GETFD) = 0
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
getdents(3, /* 5 entries */, 32768) = 144
getdents(3, /* 0 entries */, 32768) = 0
close(3)= 0
unlinkat(4, .bashrc, 0)
