Re: BUG in filp_close() (was: Re: 2.6.19-rc1-mm1)

[Dave Kleikamp]

On Tue, 2006-10-10 at 10:47 -0500, Dave Kleikamp wrote:
> On Tue, 2006-10-10 at 00:09 -0700, Andrew Morton wrote:
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.19-rc1/2.6.19-rc1-mm1/
> 
> I'm seeing an exception in filp_close(), called from sys_dup2().  I have
> only seen it when I try to start up a java application (Lotus
> Workplace).
> 
> I suspect that it may be related to the fdtable work, but I haven't
> investigated it too closely.

Still don't know exactly what's going on here.  In case it helps, this
is the call to dup2() from strace output:

1419  open("/dev/null", O_RDWR)         = 7
1419  getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0
1419  dup2(7, 524)                      = 524
1419  dup2(7, 525 <unfinished ...>

> 
> > +fdtable-delete-pointless-code-in-dup_fd.patch
> > +fdtable-make-fdarray-and-fdsets-equal-in-size.patch
> > +fdtable-remove-the-free_files-field.patch
> > +fdtable-implement-new-pagesize-based-fdtable-allocator.patch
> > 
> >  Redo the fdtable code.
> 
> BUG: unable to handle kernel paging request at virtual address 3237304a
>  printing eip:
> c015636f
> *pde = 00000000
> Oops: 0000 [#1]
> PREEMPT 
> last sysfs file: /block/hda/hda5/stat
> Modules linked in: irda crc_ccitt tun airo e1000 pcmcia yenta_socket rsrc_nonstatic pcmcia_core radeon rtc ntfs jfs
> CPU:    0
> EIP:    0060:[<c015636f>]    Not tainted VLI
> EFLAGS: 00010206   (2.6.19-rc1-mm1 #1)
> EIP is at filp_close+0xc/0x5e
> eax: 00000000   ebx: 32373036   ecx: cbc66000   edx: 00000000
> esi: 00000001   edi: dff0cc80   ebp: cbc67f8c   esp: cbc67f80
> ds: 007b   es: 007b   ss: 0068
> Process java (pid: 12945, ti=cbc66000 task=ce9d6b00 task.ti=cbc66000)
> Stack: 0000020c 00000001 cef765c0 cbc67fb4 c01623ed 32373036 dff0cc80 dff0cca4 
>        32373036 dff0cc80 00000007 00000000 fffffff4 cbc66000 c0102e05 00000007 
>        0000020c 00000000 00000000 fffffff4 bf966c14 0000003f 0000007b c03b007b 
> Call Trace:
>  [<c01623ed>] sys_dup2+0xdb/0x10f
>  [<c0102e05>] sysenter_past_esp+0x56/0x79
> DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x79
> Leftover inexact backtrace:
>  =======================
> Code: 26 00 8b 43 04 8b 40 0c 0f b3 30 3b 73 4c 73 03 89 73 4c 89 f8 e8 c0 51 26 00 5b 5e 5f 5d c3 55 89 e5 57 8b 7d 0c 56 53 8b 5d 08 <8b> 43 14 85 c0 75 0f 68 a1 e8 3f c0 31 f6 e8 54 35 fc ff 59 eb 
> EIP: [<c015636f>] filp_close+0xc/0x5e SS:ESP 0068:cbc67f80
>  <1>BUG: unable to handle kernel paging request at virtual address 02404e7c
>  printing eip:
> c015636f
> *pde = 00000000
> Oops: 0000 [#2]
> PREEMPT 
> last sysfs file: /block/hda/hda5/stat
> Modules linked in: irda crc_ccitt tun airo e1000 pcmcia yenta_socket rsrc_nonstatic pcmcia_core radeon rtc ntfs jfs
> CPU:    0
> EIP:    0060:[<c015636f>]    Not tainted VLI
> EFLAGS: 00010202   (2.6.19-rc1-mm1 #1)
> EIP is at filp_close+0xc/0x5e
> eax: 00000000   ebx: 02404e68   ecx: cc636000   edx: 00000000
> esi: 00000001   edi: dfcfecc0   ebp: cc637f8c   esp: cc637f80
> ds: 007b   es: 007b   ss: 0068
> Process java (pid: 13593, ti=cc636000 task=ce97f550 task.ti=cc636000)
> Stack: 0000020c 00000001 cbc56b80 cc637fb4 c01623ed 02404e68 dfcfecc0 dfcfece4 
>        02404e68 dfcfecc0 00000007 00000000 fffffff4 cc636000 c0102e05 00000007 
>        0000020c 00000000 00000000 fffffff4 bfc5f704 0000003f 0000007b c03b007b 
> Call Trace:
>  [<c01623ed>] sys_dup2+0xdb/0x10f
>  [<c0102e05>] sysenter_past_esp+0x56/0x79
> DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x79
> Leftover inexact backtrace:
>  =======================
> Code: 26 00 8b 43 04 8b 40 0c 0f b3 30 3b 73 4c 73 03 89 73 4c 89 f8 e8 c0 51 26 00 5b 5e 5f 5d c3 55 89 e5 57 8b 7d 0c 56 53 8b 5d 08 <8b> 43 14 85 c0 75 0f 68 a1 e8 3f c0 31 f6 e8 54 35 fc ff 59 eb 
> EIP: [<c015636f>] filp_close+0xc/0x5e SS:ESP 0068:cc637f80
>  <1>BUG: unable to handle kernel NULL pointer dereference at virtual address 00000127
>  printing eip:
> c01874ca
> *pde = 00000000
> Oops: 0000 [#3]
> PREEMPT 
> last sysfs file: /block/hda/hda5/stat
> Modules linked in: irda crc_ccitt tun airo e1000 pcmcia yenta_socket rsrc_nonstatic pcmcia_core radeon rtc ntfs jfs
> CPU:    0
> EIP:    0060:[<c01874ca>]    Not tainted VLI
> EFLAGS: 00210246   (2.6.19-rc1-mm1 #1)
> EIP is at dnotify_flush+0xf/0x73
> eax: c8892c4b   ebx: b7f96e4a   ecx: cab2c000   edx: b7f96e4a
> esi: 000000ff   edi: c148a280   ebp: cab2df70   esp: cab2df64
> ds: 007b   es: 007b   ss: 0068
> Process java (pid: 13942, ti=cab2c000 task=d572d4d0 task.ti=cab2c000)
> Stack: b7f96e4a 00000000 c148a280 cab2df8c c01563a6 b7f96e4a c148a280 0000020c 
>        00000001 cef5dec0 cab2dfb4 c01623ed b7f96e4a c148a280 c148a2a4 b7f96e4a 
>        c148a280 00000007 00000000 fffffff4 cab2c000 c0102e05 00000007 0000020c 
> Call Trace:
>  [<c01563a6>] filp_close+0x43/0x5e
>  [<c01623ed>] sys_dup2+0xdb/0x10f
>  [<c0102e05>] sysenter_past_esp+0x56/0x79
> DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x79
> Leftover inexact backtrace:
>  =======================
> Code: ff ff 53 e8 d3 00 fe ff 83 c4 0c eb 07 89 f0 e8 6b 40 23 00 8d 65 f4 5b 5e 5f 5d c3 55 89 e5 8b 55 08 57 56 53 8b 42 08 8b 70 30 <0f> b7 46 28 25 00 f0 00 00 3d 00 40 00 00 75 4c 8d 7e 70 89 f8 
> EIP: [<c01874ca>] dnotify_flush+0xf/0x73 SS:ESP 0068:cab2df64
>  
> 
-- 
David Kleikamp
IBM Linux Technology Center

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