Public bug reported:
Upon touching a file owned by another user, with read write permissions for the
current user, touch segfaults and the kernel oopses:
Test Case:
[EMAIL PROTECTED]:~$ sudo su
[EMAIL PROTECTED]:/home/azrael# touch tmp
[EMAIL PROTECTED]:/home/azrael# chmod o+rw tmp
[EMAIL PROTECTED]:/home/azrael# exit
[EMAIL PROTECTED]:~$ touch tmp
Segmentation fault
[EMAIL PROTECTED]:~$
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] Oops: 0000 [#1]
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] SMP
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] CPU: 0
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] EIP: 0060:[permission+91/288] Tainted:
P VLI
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] EFLAGS: 00210202 (2.6.22-7-generic #1)
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] EIP is at permission+0x5b/0x120
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] eax: 00000001 ebx: eebda220 ecx: ed6d1f04
edx: 00000002
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] esi: fffffff3 edi: 00000002 ebp: ed6d1f04
esp: ed6d1ee8
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] ds: 007b es: 007b fs: 00d8 gs: 0033 ss:
0068
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] Process touch (pid: 11747, ti=ed6d0000 task=f
4f46000 task.ti=ed6d0000)
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] Stack: eebea280 fffffff3 00000000 f1667a80 c0
1a0e55 c016d678 eebda220 f1667a80
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] ffffff9c ed6d1f30 00000000 c017f595 f1
667a80 00000000 eebda280 b7f370e4
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] ed851898 ef32e1c0 00000cdc f4c55b7c 00
000000 00000000 dffb4ac4 00000002
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] Call Trace:
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [do_utimes+453/496] do_utimes+0x1c5/0x1f0
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [__handle_mm_fault+648/2816] __handle_mm_fau
lt+0x288/0xb00
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [nameidata_to_filp+53/64] nameidata_to_filp+
0x35/0x40
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [do_page_fault+890/1664] do_page_fault+0x37a
/0x680
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [sys_utimensat+34/160] sys_utimensat+0x22/0x
a0
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [do_page_fault+0/1664] do_page_fault+0x0/0x6
80
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [sysenter_past_esp+107/169] sysenter_past_es
p+0x6b/0xa9
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] [iw_handler_get_private+64/128] iw_handler_g
et_private+0x40/0x80
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] =======================
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] Code: 83 00 00 00 f6 83 3c 01 00 00 08 75 73
8d 76 00 f7 c7 01 00 00 00 75 3f 8b 83 90 00 00 00 89 fa 83 e2 f7 85 c0 0f 84 87
00 00 00 <8b> 70 34 85 f6 0f 84 7c 00 00 00 89 e9 89 d8 ff d6 85 c0 0f 84
Message from [EMAIL PROTECTED] at Fri Jul 6 01:38:55 2007 ...
mobileDemon kernel: [ 529.424000] EIP: [permission+91/288] permission+0x5b/0x12
0 SS:ESP 0068:ed6d1ee8
Filesystem in this test case is ext3.
A friend has reproduced this bug with XFS, he may file an additional test case
soon.
** Affects: Ubuntu
Importance: Undecided
Status: New
** Tags: gutsy kernel
--
Kernel Oops on Touch, Possible VFS Bug
https://bugs.launchpad.net/bugs/124358
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