[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
FYI: 1.0-5 still crashes every reboot in karmic -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
@Thomas, it's quite possible that there is more than one bug here. If I marked your bug as a duplicate in error, please unmark it and we will deal with it separately. If you haven't filed a bug at all yet, please file it separately. -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
The bug is pretty straightforward to reproduce. It looks like an integer overflow which will be triggered by files longer than 2GB: Reading symbols from /sbin/sreadahead...Reading symbols from /usr/lib/debug/sbin/sreadahead...done. (no debugging symbols found)...done. (gdb) r -t1 -d --no-fork Starting program: /sbin/sreadahead -t1 -d --no-fork [Thread debugging using libthread_db enabled] Trace contained 33438 records /etc/ld.so.cache: 1 fragment(s), 120kb, 100.0% [...] /etc/libvirt/storage/default.xml: 1 fragment(s), 1kb, 100.0% Program received signal SIGSEGV, Segmentation fault. 0x00401f3b in get_blocks (signal=value optimized out) at sreadahead.c:315 warning: Source file is more recent than executable. 315 if (mincorebuf[i / 4096]) (gdb) print mincorebuf $1 = value optimized out (gdb) print i $2 = -2147483648 [...] (gdb) print statbuf.st_size $6 = 4294967296 (gdb) print r-filename $7 = /var/lib/libvirt/images/uec-cc.img, '\000' repeats 93 times -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
** Changed in: sreadahead (Ubuntu) Status: New = Triaged ** Changed in: sreadahead (Ubuntu) Assignee: (unassigned) = Matt Zimmerman (mdz) ** Changed in: sreadahead (Ubuntu) Status: Triaged = In Progress ** Attachment added: sreadahead-414597.patch http://launchpadlibrarian.net/33401404/sreadahead-414597.patch ** Attachment removed: sreadahead-414597.patch http://launchpadlibrarian.net/33401404/sreadahead-414597.patch -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
** Attachment added: sreadahead-414597.patch http://launchpadlibrarian.net/33401481/sreadahead-414597.patch -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
This bug was fixed in the package sreadahead - 1.0-5 --- sreadahead (1.0-5) karmic; urgency=low * Use off_t instead of int for the index used relative to statbuf.st_size (which is off_t), to prevent an overflow on files 2GB (LP: #414597) -- Matt Zimmerman m...@ubuntu.com Sat, 10 Oct 2009 12:19:26 +0100 ** Changed in: sreadahead (Ubuntu) Status: In Progress = Fix Released -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
Fixed? I still have this bug on the last image 2.6.31-12-generic #41-Ubuntu SMP Wed Oct 7 19:37:12 UTC 2009 x86_64 GNU/Linux sreadahead crashed with SIGSEGV in __pause_nocancel() dmesg: [ 78.676125] sreadahead[456]: segfault at 7f428a236010 ip 00401f3b sp 7fff9be6a430 error 4 in sreadahead[40+3000] -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
Same as Michele Mordenti here: linux-image-2.6.31-12-generic 2.6.31-12.41 sreadahead 1.0-4 Reboot shortly after running pkgsync, so had the newest packages no.archive.ubuntu.com had to offer: Oct 8 08:51:23 ov kernel: [ 73.555208] sreadahead[595]: segfault at 7fabdb5f3010 ip 00401f3b sp 7378e070 error 4 in sreadahead[40+3000] Encrypted root filesystem and ext4 converted from ext3, if any of that is at all relevant :) -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
Same as Øystein Viggen here. My root filesystem has also been converted from ext3 -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
Don't think it has to do with conversion to ext4. I'm still running ext3 and I'm affected too. -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
okay close the issue ... /p On Wed, 2009-10-07 at 22:48 +, sheldonross wrote: Should this be marked fixed? I am nolonger seeing this in the latest images. -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
Should this be marked fixed? I am nolonger seeing this in the latest images. -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
I did a debug run with ddd.
The segfault happens in get_ra_blocks() at the code snippet:
for (i = 0; i = statbuf.st_size; i += 4096) {
if (mincorebuf[i / 4096])
there++;
else
notthere++;
if (phase == 1 !mincorebuf[i / 4096]) {
phase = 0;
if (i statbuf.st_size)
i = statbuf.st_size + 1;
record[rcount].offset = start;
record[rcount].len = i - 1 - start;
rcount++;
if (rcount = 4000) rcount = 4000;
} else if (phase == 0 mincorebuf[i / 4096]) {
phase = 1;
start = i;
}
}
--
sreadahead crashed with SIGSEGV in __pause_nocancel()
https://bugs.launchpad.net/bugs/414597
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[Bug 414597] Re: sreadahead crashed with SIGSEGV in __pause_nocancel()
** Visibility changed to: Public -- sreadahead crashed with SIGSEGV in __pause_nocancel() https://bugs.launchpad.net/bugs/414597 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
