On 8/28/20 5:50 PM, Rich Felker wrote:
> This patch broke strace - it spews out bogus syscalls and gets the
> tracee hung. I suspect the last hunk is wrong and breaks all
> non-seccomp tracing. I'll follow up with further analysis and possibly
> a fix if you don't find one sooner.
Hmm, it does not hang for me but it looks suspicious:
root@tirpitz:~> strace ./test
execve("./test", ["./test"], 0x7be59690 /* 24 vars */) = 0
brk(NULL) = 0x52abc000
uname({sysname="Linux", nodename="tirpitz", ...}) = 0
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=67578, ...}) = 0
mmap2(NULL, 67578, PROT_READ, MAP_PRIVATE, 3, 0) = 0x29584000
close(3) = 0
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1
EPERM (Operation not permitted)
openat(AT_FDCWD, "/lib/sh4-linux-gnu/tls/sh4a/libc.so.6",
O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/sh4-linux-gnu/tls/sh4a", 0x7b89fb2c) = -1 ENOENT (No such file or
directory)
openat(AT_FDCWD, "/lib/sh4-linux-gnu/tls/libc.so.6",
O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/sh4-linux-gnu/tls", 0x7b89fb2c) = -1 ENOENT (No such file or
directory)
openat(AT_FDCWD, "/lib/sh4-linux-gnu/sh4a/libc.so.6",
O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/sh4-linux-gnu/sh4a", 0x7b89fb2c) = -1 ENOENT (No such file or
directory)
openat(AT_FDCWD, "/lib/sh4-linux-gnu/libc.so.6",
O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0*\0\1\0\0\0t\306\1\0004\0\0\0"...,
512) = 512
pread64(3, "\4\0\0\0\20\0\0\0\1\0\0\0GNU\0\0\0\0\0\3\0\0\0\2\0\0\0\0\0\0\0",
32, 1290836) = 32
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1
EPERM (Operation not permitted)
close(3) = 0
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1
EPERM (Operation not permitted)
writev(2, [{iov_base="./test", iov_len=6}, {iov_base=": ", iov_len=2},
{iov_base="error while loading shared libra"..., iov_len=36}, {iov_base=": ",
iov_len=2}, {iov_base="", iov_len=0}, {iov_base="", iov_len=0}, {iov_base="out
of memory", iov_len=13}, {iov_base=": ", iov_len=2}, {iov_base="Operation not
permitted", iov_len=23}, {iov_base="\n", iov_len=1}], 10./test: error while
loading shared libraries: out of memory: Operation not permitted
) = 85
exit_group(127) = ?
+++ exited with 127 +++
root@tirpitz:~>
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - [email protected]
`. `' Freie Universitaet Berlin - [email protected]
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
