From: Dave Jones <davej@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
davidlohr.bueso@hp.com, riel@redhat.com, viro@zeniv.linux.org.uk
Subject: SHM oops in newseg()
Date: Thu, 9 May 2013 00:35:32 -0400 [thread overview]
Message-ID: <20130509043532.GA28235@redhat.com> (raw)
Just saw this on v3.9-11789-ge0fd9af while fuzz-testing.
[ 163.917836] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[ 163.918984] IP: [<ffffffff812c48ed>] newseg+0x10d/0x390
[ 163.919705] PGD cf8c1067 PUD cf8c2067 PMD 0
[ 163.920326] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 163.921096] Modules linked in: hidp bnep l2tp_ppp l2tp_netlink l2tp_core ipt_ULOG rfcomm can_bcm cmtp kernelcapi nfnetlink scsi_transport_iscsi can_raw ipx p8023 pppoe p8022 phonet af_rxrpc pppox caif_socket ppp_generic caif rose af_802154 slhc llc2 nfc appletalk decnet atm rds psnap llc can netrom af_key x25 ax25 irda crc_ccitt lockd sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_conntrack nf_conntrack ip6table_filter ip6_tables snd_hda_codec_realtek snd_hda_intel raid0 snd_hda_codec kvm_amd snd_pcm kvm btusb bluetooth microcode serio_raw snd_page_alloc snd_timer pcspkr snd rfkill edac_core soundcore r8169 mii radeon backlight drm_kms_helper ttm
[ 163.929949] CPU: 2 PID: 7636 Comm: trinity-child2 Not tainted 3.9.0+ #67
[ 163.931276] Hardware name: Gigabyte Technology Co., Ltd. GA-MA78GM-S2H/GA-MA78GM-S2H, BIOS F12a 04/23/2010
[ 163.932551] task: ffff88011bc04a00 ti: ffff8800cf920000 task.ti: ffff8800cf920000
[ 163.933541] RIP: 0010:[<ffffffff812c48ed>] [<ffffffff812c48ed>] newseg+0x10d/0x390
[ 163.934573] RSP: 0018:ffff8800cf921e78 EFLAGS: 00010246
[ 163.935281] RAX: 0000000000000000 RBX: ffffffff81c77a20 RCX: 0000000000000009
[ 163.936225] RDX: ffffffff82ab62b8 RSI: 0000000000001000 RDI: 0000000000008000
[ 163.937169] RBP: ffff8800cf921ec8 R08: 0000000000000010 R09: 000000000000000f
[ 163.938113] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001fff
[ 163.939057] R13: ffff8800cfa30b80 R14: 000000003f43df5b R15: 0000000000000000
[ 163.940005] FS: 00007f8391182740(0000) GS:ffff88012aa00000(0000) knlGS:0000000000000000
[ 163.941077] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 163.941843] CR2: 0000000000000008 CR3: 00000000cf8c0000 CR4: 00000000000007e0
[ 163.942789] Stack:
[ 163.943067] 0000000f81c77c50 0000000000000002 3056535953c77c50 0030303030303030
[ 163.944115] 00000000bf3b8607 0000000000000000 0000000000000010 ffffffff81c77c50
[ 163.948881] 00000000000000e8 0000000000000002 ffff8800cf921f40 ffffffff812be322
[ 163.953629] Call Trace:
[ 163.957706] [<ffffffff812be322>] ipcget+0x182/0x380
[ 163.962123] [<ffffffff810b99a5>] ? trace_hardirqs_on_caller+0x115/0x1e0
[ 163.966752] [<ffffffff812c559a>] SyS_shmget+0x5a/0x60
[ 163.971163] [<ffffffff812c47e0>] ? shm_close+0x140/0x140
[ 163.975590] [<ffffffff812c3e60>] ? shm_release+0x50/0x50
[ 163.979991] [<ffffffff812c3df0>] ? shm_get_unmapped_area+0x20/0x20
[ 163.984499] [<ffffffff816caa14>] tracesys+0xdd/0xe2
[ 163.988868] Code: c6 00 08 00 00 0f 84 f3 00 00 00 45 89 f1 41 c1 e9 1a 0f 85 2e 01 00 00 8b 05 70 1e 7f 01 48 69 c0 98 04 00 00 48 05 20 5e ab 82 <8b> 48 08 b8 00 10 00 00 4c 89 f2 48 c1 e2 09 48 8d 7d c3 41 b8
[ 164.000083] RIP [<ffffffff812c48ed>] newseg+0x10d/0x390
[ 164.004681] RSP <ffff8800cf921e78>
[ 164.009000] CR2: 0000000000000008
[ 164.064784] ---[ end trace e74858ae5e89f4a7 ]---
That Code: line decoded seems to point at..
static inline unsigned long huge_page_size(struct hstate *h)
{
return (unsigned long)PAGE_SIZE << h->order;
bfd: 8b 48 08 mov 0x8(%rax),%ecx
c00: b8 00 10 00 00 mov $0x1000,%eax
next reply other threads:[~2013-05-09 4:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-09 4:35 Dave Jones [this message]
2013-05-09 7:08 ` SHM oops in newseg() Li Zefan
2013-05-09 14:42 ` Naoya Horiguchi
2013-05-09 14:43 ` Rik van Riel
2013-05-09 17:11 ` Davidlohr Bueso
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