Re: 2.6.22.6: kernel BUG at fs/locks.c:171
From: Nick Piggin
Date: Thu Sep 13 2007 - 11:34:00 EST
On Thursday 13 September 2007 19:20, Soeren Sonnenburg wrote:
> Dear all,
>
> I've just seen this in dmesg on a AMD K7 / kernel 2.6.22.6 machine
> (config attached).
>
> Any ideas / which further information needed ?
Thanks for the report. Is it reproduceable? It seems like the
locks_free_lock call that's oopsing is coming from __posix_lock_file.
The actual function looks fine, but the lock being freed could have
been corrupted if there was slab corruption, or a hardware corruption.
You could: try running memtest86+ overnight. And try the following
patch and turn on slab debugging then try to reproduce the problem.
>
> Soeren
>
> ------------[ cut here ]------------
> kernel BUG at fs/locks.c:171!
> invalid opcode: 0000 [#1]
> Modules linked in: ipt_iprange ipt_REDIRECT capi kernelcapi capifs
> ipt_REJECT xt_tcpudp xt_state xt_limit ipt_LOG ipt_MASQUERADE
> iptable_mangle iptable_nat nf_conntrack_ipv4 iptable_filter ip_tables
> x_tables b44 ohci1394 ieee1394 nf_nat_ftp nf_nat nf_conntrack_ftp
> nf_conntrack lcd tda827x saa7134_dvb dvb_pll video_buf_dvb tuner tda1004x
> ves1820 usb_storage usblp saa7134 compat_ioctl32 budget_ci budget_core
> dvb_ttpci dvb_core saa7146_vv video_buf saa7146 ttpci_eeprom via_agp
> ir_kbd_i2c videodev v4l2_common v4l1_compat ir_common agpgart CPU: 0
> EIP: 0060:[<c0158f59>] Not tainted VLI
> EFLAGS: 00010206 (2.6.22.6 #1)
> EIP is at locks_free_lock+0xb/0x3b
> eax: e1d07f9c ebx: e1d07f80 ecx: f5f5e2f0 edx: 00000000
> esi: 00000000 edi: 00000000 ebp: 00000000 esp: da3d7f04
> ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068
> Process mrtg-load (pid: 19688, ti=da3d6000 task=f5e3a030 task.ti=da3d6000)
> Stack: 00000000 c015972b 00000002 c04889c8 c012b920 f5f5e290 c048541c
> f0ed3ca0 01485414 00000000 e1d07f80 00000000 f0f39f58 44ef35f1 f62fc2ac
> 00000000 00000000 f5f5e290 00000000 d23106c0 c015a891 00000000 00000007
> 00000004 Call Trace:
> [<c015972b>] __posix_lock_file+0x44e/0x47f
> [<c012b920>] getnstimeofday+0x2b/0xaf
> [<c015a891>] fcntl_setlk+0xff/0x1f6
> [<c011d836>] do_setitimer+0xfa/0x226
> [<c0156b87>] sys_fcntl64+0x74/0x85
> [<c0103ade>] syscall_call+0x7/0xb
> =======================
> Code: 74 1b 8b 15 30 93 48 c0 8d 43 04 89 53 04 89 42 04 a3 30 93 48 c0 c7
> 40 04 30 93 48 c0 5b 5e c3 53 89 c3 8d 40 1c 39 43 1c 74 04 <0f> 0b eb fe
> 8d 43 0c 39 43 0c 74 04 0f 0b eb fe 8d 43 04 39 43 EIP: [<c0158f59>]
> locks_free_lock+0xb/0x3b SS:ESP 0068:da3d7f04
> BUG: unable to handle kernel paging request at virtual address 9ee420b0
> printing eip:
> c014ab7d
> *pde = 00000000
> Oops: 0002 [#2]
> Modules linked in: ipt_iprange ipt_REDIRECT capi kernelcapi capifs
> ipt_REJECT xt_tcpudp xt_state xt_limit ipt_LOG ipt_MASQUERADE
> iptable_mangle iptable_nat nf_conntrack_ipv4 iptable_filter ip_tables
> x_tables b44 ohci1394 ieee1394 nf_nat_ftp nf_nat nf_conntrack_ftp
> nf_conntrack lcd tda827x saa7134_dvb dvb_pll video_buf_dvb tuner tda1004x
> ves1820 usb_storage usblp saa7134 compat_ioctl32 budget_ci budget_core
> dvb_ttpci dvb_core saa7146_vv video_buf saa7146 ttpci_eeprom via_agp
> ir_kbd_i2c videodev v4l2_common v4l1_compat ir_common agpgart CPU: 0
> EIP: 0060:[<c014ab7d>] Not tainted VLI
> EFLAGS: 00010082 (2.6.22.6 #1)
> EIP is at free_block+0x61/0xfb
> eax: a75b2c19 ebx: c1cf6c10 ecx: e1d070c4 edx: 9ee420ac
> esi: e1d07000 edi: dfde6960 ebp: dfde7620 esp: dfd87f44
> ds: 007b es: 007b fs: 0000 gs: 0000 ss: 0068
> Process events/0 (pid: 4, ti=dfd86000 task=dfdc4a50 task.ti=dfd86000)
> Stack: 00000012 00000000 00000018 00000000 c1cf6c10 c1cf6c10 00000018
> c1cf6c00 dfde7620 c014ac86 00000000 dfde6960 dfde7620 c0521d20 00000000
> c014b869 00000000 00000000 dfde69e0 c0521d20 c014b827 c0125955 dfdc4b5c
> 8f0c99c0 Call Trace:
> [<c014ac86>] drain_array+0x6f/0x89
> [<c014b869>] cache_reap+0x42/0xde
> [<c014b827>] cache_reap+0x0/0xde
> [<c0125955>] run_workqueue+0x6b/0xdf
> [<c0125ec7>] worker_thread+0x0/0xbd
> [<c0125f79>] worker_thread+0xb2/0xbd
> [<c0128221>] autoremove_wake_function+0x0/0x35
> [<c01280cc>] kthread+0x36/0x5a
> [<c0128096>] kthread+0x0/0x5a
> [<c0104607>] kernel_thread_helper+0x7/0x10
> =======================
> Code: 8b 02 25 00 40 02 00 3d 00 40 02 00 75 03 8b 52 0c 8b 02 84 c0 78 04
> 0f 0b eb fe 8b 72 1c 8b 54 24 28 8b 46 04 8b 7c 95 4c 8b 16 <89> 42 04 89
> 10 2b 4e 0c c7 06 00 01 10 00 c7 46 04 00 02 20 00 EIP: [<c014ab7d>]
> free_block+0x61/0xfb SS:ESP 0068:dfd87f44
> ------------[ cut here ]------------
> kernel BUG at fs/locks.c:171!
> invalid opcode: 0000 [#3]
> Modules linked in: ipt_iprange ipt_REDIRECT capi kernelcapi capifs
> ipt_REJECT xt_tcpudp xt_state xt_limit ipt_LOG ipt_MASQUERADE
> iptable_mangle iptable_nat nf_conntrack_ipv4 iptable_filter ip_tables
> x_tables b44 ohci1394 ieee1394 nf_nat_ftp nf_nat nf_conntrack_ftp
> nf_conntrack lcd tda827x saa7134_dvb dvb_pll video_buf_dvb tuner tda1004x
> ves1820 usb_storage usblp saa7134 compat_ioctl32 budget_ci budget_core
> dvb_ttpci dvb_core saa7146_vv video_buf saa7146 ttpci_eeprom via_agp
> ir_kbd_i2c videodev v4l2_common v4l1_compat ir_common agpgart CPU: 0
> EIP: 0060:[<c0158f59>] Not tainted VLI
> EFLAGS: 00010287 (2.6.22.6 #1)
> EIP is at locks_free_lock+0xb/0x3b
> eax: e1d07f40 ebx: e1d07f24 ecx: dfde7620 edx: c16bebc0
> esi: 00000000 edi: 00000000 ebp: f5f5e0c4 esp: f1309efc
> ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068
> Process nmbd (pid: 3522, ti=f1308000 task=f12ba590 task.ti=f1308000)
> Stack: 00000000 c015972b f10b8d4c c1f0d380 02e58f5c f5f5e3a4 000007e8
> 00000000 010b8d4c f5f5e120 e1d07f24 00000001 000000a8 00000000 f5f5eca0
> 00000000 00000000 f5f5e3a4 00000000 f635a260 c015a13f 00000000 0000000e
> 0000000a Call Trace:
> [<c015972b>] __posix_lock_file+0x44e/0x47f
> [<c015a13f>] fcntl_setlk64+0xff/0x1f4
> [<c0156b75>] sys_fcntl64+0x62/0x85
> [<c0103ade>] syscall_call+0x7/0xb
> =======================
> Code: 74 1b 8b 15 30 93 48 c0 8d 43 04 89 53 04 89 42 04 a3 30 93 48 c0 c7
> 40 04 30 93 48 c0 5b 5e c3 53 89 c3 8d 40 1c 39 43 1c 74 04 <0f> 0b eb fe
> 8d 43 0c 39 43 0c 74 04 0f 0b eb fe 8d 43 04 39 43 EIP: [<c0158f59>]
> locks_free_lock+0xb/0x3b SS:ESP 0068:f1309efc
Index: linux-2.6/fs/locks.c
===================================================================
--- linux-2.6.orig/fs/locks.c
+++ linux-2.6/fs/locks.c
@@ -147,7 +147,14 @@ static struct kmem_cache *filelock_cache
/* Allocate an empty lock structure. */
static struct file_lock *locks_alloc_lock(void)
{
- return kmem_cache_alloc(filelock_cache, GFP_KERNEL);
+ struct file_lock *fl;
+ fl = kmem_cache_alloc(filelock_cache, GFP_KERNEL);
+ if (fl) {
+ BUG_ON(waitqueue_active(&fl->fl_wait));
+ BUG_ON(!list_empty(&fl->fl_block));
+ BUG_ON(!list_empty(&fl->fl_link));
+ }
+ return fl;
}
static void locks_release_private(struct file_lock *fl)