From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 55821] New: kernel oops when unmounting ext3 fs
Date: Wed, 27 Mar 2013 11:38:15 +0000 (UTC)
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https://bugzilla.kernel.org/show_bug.cgi?id=55821
Summary: kernel oops when unmounting ext3 fs
Product: File System
Version: 2.5
Kernel Version: 3.8.4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext3
AssignedTo: fs_ext3@kernel-bugs.osdl.org
ReportedBy: dmaciejak@fortinet.com
Regression: No
Hi,
i am doing some filesystems testing (aka fuzzing), got this issue on vanilla
3.8.4:
Mar 27 12:23:47 linux kernel: [ 373.018889] WARNING: at fs/jbd/journal.c:470
__log_start_commit+0x94/0xb0()
Mar 27 12:23:47 linux kernel: [ 373.018891] Hardware name: PowerEdge T420
Mar 27 12:23:47 linux kernel: [ 373.018894] jbd: bad log_start_commit:
2801795176 2801795176 0 0
Mar 27 12:23:47 linux kernel: [ 373.018895] Modules linked in: ipmi_devintf
ipmi_si ipmi_msghandler nls_iso8859_1 coretemp kvm_intel kvm
ghash_clmulni_intel aesni_intel ablk_helper cryptd lrw aes_x86_64 sb_edac xts
edac_core gf128mul lp joydev mei gpio_ich microcode dcdbas lpc_ich parport
shpchp acpi_power_meter wmi mac_hid raid10 raid456 async_pq async_xor xor
async_memcpy async_raid6_recov hid_generic ahci libahci usbhid tg3 ptp hid
raid6_pq pps_core async_tx raid1 raid0 multipath linear
Mar 27 12:23:47 linux kernel: [ 373.018935] Pid: 1924, comm: umount Tainted: G
W 3.8.4 #1
Mar 27 12:23:47 linux kernel: [ 373.018937] Call Trace:
Mar 27 12:23:47 linux kernel: [ 373.018943] []
warn_slowpath_common+0x7f/0xc0
Mar 27 12:23:47 linux kernel: [ 373.018947] []
warn_slowpath_fmt+0x46/0x50
Mar 27 12:23:47 linux kernel: [ 373.018950] []
__log_start_commit+0x94/0xb0
Mar 27 12:23:47 linux kernel: [ 373.018955] [] ?
_raw_spin_lock+0xe/0x20
Mar 27 12:23:47 linux kernel: [ 373.018959] []
log_start_commit+0x36/0x60
Mar 27 12:23:47 linux kernel: [ 373.018964] []
ext3_evict_inode+0x26f/0x2c0
Mar 27 12:23:47 linux kernel: [ 373.018968] []
evict+0xb6/0x1b0
Mar 27 12:23:47 linux kernel: [ 373.018971] []
iput+0x109/0x190
Mar 27 12:23:47 linux kernel: [ 373.018975] []
journal_destroy+0x1a7/0x220
Mar 27 12:23:47 linux kernel: [ 373.018978] [] ?
finish_wait+0x80/0x80
Mar 27 12:23:47 linux kernel: [ 373.018983] []
ext3_put_super+0x47/0x2a0
Mar 27 12:23:47 linux kernel: [ 373.018988] []
generic_shutdown_super+0x61/0xf0
Mar 27 12:23:47 linux kernel: [ 373.018992] []
kill_block_super+0x30/0x80
Mar 27 12:23:47 linux kernel: [ 373.018995] []
deactivate_locked_super+0x57/0x80
Mar 27 12:23:47 linux kernel: [ 373.018999] []
deactivate_super+0x4e/0x70
Mar 27 12:23:47 linux kernel: [ 373.019003] []
mntput_no_expire+0x101/0x160
Mar 27 12:23:47 linux kernel: [ 373.019007] []
sys_umount+0x9c/0x3c0
Mar 27 12:23:47 linux kernel: [ 373.019012] [] ?
__set_current_blocked+0x52/0x70
Mar 27 12:23:47 linux kernel: [ 373.019017] []
system_call_fastpath+0x16/0x1b
Mar 27 12:23:47 linux kernel: [ 373.019019] ---[ end trace 7a9e3bafae5e7653
]---
how to reproduce:
*you need* to be root then issue the cmds below
mkdir /media/test
gunzip ext3.poc.img.gz
mount -t ext3 -o loop ext3.poc.img /media/test/
unmount /media/test
the unmount would never return, check the logs to see the backtrace.
best regards,
David Maciejak
Fortinet's FortiGuard Labs
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