Re: probably commit b3d574ae ( Linus github 10-01-2015) causes oops after run Android SDK Manager from Eclipse

From: Krzysztof Kolasa
Date: Sun Jan 11 2015 - 08:46:59 EST

OK CONFIG_DEBUG_BUGVERBOSE enabled

kernel BUG at mm/rmap.c:399!
this one line added with merged commit b3d574ae
after remove it:
----
diff --git a/mm/rmap.c b/mm/rmap.c
index 71cd5bd..68d115f 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -396,7 +396,6 @@ void unlink_anon_vmas(struct vm_area_struct *vma)
list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {
struct anon_vma *anon_vma = avc->anon_vma;

- BUG_ON(anon_vma->degree);
put_anon_vma(anon_vma);

list_del(&avc->same_vma);
----
system working stable and not generate oops.

On 11.01.2015 11:56, Vlastimil Babka wrote:
Re: subject

why do you think it was this commit? bisection? The commit you point to is
"Merge branch 'akpm' (patches from Andrew)"
It's possible that bisection pointed you to this, instead of the proper commit
though. Luckily, there are only 12 of them and ...

On 01/10/2015 01:15 PM, Krzysztof Kolasa wrote:
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320920] ------------[ cut
here ]------------
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320927] Kernel BUG at
ffffffff81187f1f [verbose debug info unavailable]
Could you enable CONFIG_DEBUG_BUGVERBOSE please? This should make the stacktrace
readable.

Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320929] invalid opcode: 0000
[#3] SMP
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320932] Modules linked in:
dm_crypt(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE)
vboxdrv(OE) c
use(E) arc4(E) md4(E) bnep(E) rfcomm(E) bluetooth(E) nls_utf8(E) cifs(E)
fscache(E) binfmt_misc(E) fglrx(OE) uvcvideo(E) videobuf2_vmalloc(E)
x86_pkg_
temp_thermal(E) videobuf2_memops(E) videobuf2_core(E) hp_wmi(E)
v4l2_common(E) wl(POE) kvm_intel(E) sparse_keymap(E) videodev(E) kvm(E)
ghash_clmulni_
intel(E) aesni_intel(E) aes_x86_64(E) lrw(E) gf128mul(E)
snd_hda_codec_idt(E) snd_hda_codec_hdmi(E) snd_hda_codec_generic(E)
glue_helper(E) ablk_helpe
r(E) snd_hda_intel(E) cryptd(E) snd_hda_controller(E) snd_hda_codec(E)
snd_hwdep(E) snd_pcm(E) snd_seq_midi(E) snd_seq_midi_event(E)
microcode(E) snd_
rawmidi(E) snd_seq(E) snd_seq_device(E) snd_timer(E) snd(E) cfg80211(E)
soundcore(E) joydev(E) lpc_ich(E) hp_accel(E) wmi(E) serio_raw(E)
tpm_infineon
(E) lis3lv02d(E) amd_iommu_v2(E) input_polldev(E) video(E) tpm_tis(E)
mac_hid(E) parport_pc(E) ppdev(E) coretemp(E) lp(E) parport(E)
hid_generic(E) us
bhid(E) hid(E) mmc_block(E) psmouse(E) firewire_ohci(E) ahci(E)
libahci(E) sdhci_pci(E) e1000e(E) firewire_core(E) sdhci(E) crc_itu_t(E)
ptp(E) pps_co
re(E)
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320979] CPU: 1 PID: 6871
Comm: Sweeper thread Tainted: P D OE 3.19.0-rc3-winsoft-x64+ #10
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320981] Hardware name:
Hewlett-Packard HP ProBook 6560b/1619, BIOS 68SCE Ver. F.50 08/04/2014
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320983] task:
ffff88005d95b1c0 ti: ffff88018ee18000 task.ti: ffff88018ee18000
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320985] RIP:
0010:[<ffffffff81187f1f>] [<ffffffff81187f1f>] unlink_anon_vmas+0x1af/0x200
Nevertheless, here we see unlink_anon_vmas, which would strongly point to
7a3ef208e662f4b63d ("mm: prevent endless growth of anon_vma hierarchy")
and we also have another report for that.

Still your stracktrace could be useful to help determining the cause, if you
enabled the verbose debugging.

Thanks.


Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320993] RSP:
0018:ffff88018ee1bba8 EFLAGS: 00010286
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320994] RAX:
ffff880182a47c50 RBX: ffff880182a47c40 RCX: ffff8801b9e1d638
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320996] RDX:
00000000ffffffff RSI: ffff8801abb60630 RDI: ffff8801abb605f0
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.320998] RBP:
ffff88018ee1bbe8 R08: 00000000f70a2000 R09: 0000000000000000
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321000] R10:
ffff880182a47c60 R11: ffffea00060a91c0 R12: ffff8801b9e1d628
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321001] R13:
ffff8801b9e1d638 R14: ffff8801abb605f0 R15: ffff8801abb605f0
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321003] FS:
0000000000000000(0000) GS:ffff88023f440000(0000) knlGS:0000000000000000
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321005] CS: 0010 DS: 002b
ES: 002b CR0: 0000000080050033
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321007] CR2:
00000000f653e70c CR3: 0000000001c12000 CR4: 00000000000407e0
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321008] Stack:
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321010] ffff8801b9e1d5c0
ffff8801abb605f0 ffff88018ee1bbe8 ffff88006a1d70b8
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321013] 00000000a3255000
0000000000000000 ffff88018ee1bc58 ffff8801b9e1d5c0
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321016] ffff88018ee1bc38
ffffffff81179b58 ffff88018ee1bc38 0000000000000000
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321019] Call Trace:
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321025] [<ffffffff81179b58>]
free_pgtables+0xa8/0x120
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321029] [<ffffffff81183e5f>]
exit_mmap+0xdf/0x170
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321033] [<ffffffff81055984>]
mmput+0x64/0x130
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321036] [<ffffffff8105ab2f>]
do_exit+0x26f/0xb10
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321039] [<ffffffff8105b45f>]
do_group_exit+0x3f/0xa0
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321044] [<ffffffff81066d48>]
get_signal+0x1d8/0x5f0
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321047] [<ffffffff81002e10>]
do_signal+0x20/0x120
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321052] [<ffffffff810d0d01>]
? compat_SyS_futex+0x71/0x140
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321055] [<ffffffff81002f80>]
do_notify_resume+0x70/0xa0
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321059] [<ffffffff8171ebc7>]
int_signal+0x12/0x17
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321061] Code: 44 24 10 48 8d
50 f0 49 8d 44 24 10 49 39 c5 75 9b 48 83 c4 18 5b 41 5c 41 5d 41 5e 41
5f 5d
c3 0f 1f 40 00 e8 c3 fa ff ff eb 99 <0f> 0b 80 3d ea 8e b6 00 00 74 16
49 8d 7e 08 48 89 55 c8 e8 09
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321088] RIP
[<ffffffff81187f1f>] unlink_anon_vmas+0x1af/0x200
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321091] RSP <ffff88018ee1bba8>
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321094] ---[ end trace
1c9e464233c6be56 ]---
Jan 10 12:33:57 krzysiek-hp1 kernel: [ 3872.321096] Fixing recursive
fault but reboot is needed!

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