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WARNING in snd_interval_mulkdiv

Status: fixed on 2018/01/22 13:19
Subsystems: sound
[Documentation on labels]
Reported-by: syzbot+7e6ee55011deeebce15d@syzkaller.appspotmail.com
Fix commit: 23b19b7b50fe ALSA: pcm: Remove yet superfluous WARN_ON()
First crash: 2442d, last: 2436d
▶ ▼ Discussions (7)
Title Replies (including bot) Last reply
[PATCH 3.16 000/254] 3.16.55-rc1 review 261 (261) 2018/03/03 15:48
[PATCH 3.2 000/140] 3.2.100-rc1 review 142 (142) 2018/02/28 16:57
[PATCH 4.4 00/53] 4.4.113-stable review 70 (70) 2018/02/28 16:49
[PATCH 3.18 00/52] 3.18.93-stable review 62 (62) 2018/01/31 08:52
[PATCH 4.14 00/89] 4.14.15-stable review 107 (107) 2018/01/25 21:42
[PATCH 4.9 00/47] 4.9.78-stable review 52 (52) 2018/01/23 00:08
WARNING in snd_interval_mulkdiv 1 (2) 2018/01/10 23:01

Sample crash report:
audit: type=1400 audit(1515606919.914:7): avc:  denied  { map } for  pid=3501 comm="syzkaller879499" path="/root/syzkaller879499069" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
WARNING: CPU: 1 PID: 3501 at sound/core/pcm_lib.c:563 muldiv32 sound/core/pcm_lib.c:563 [inline]
WARNING: CPU: 1 PID: 3501 at sound/core/pcm_lib.c:563 snd_interval_mulkdiv+0x5a9/0x650 sound/core/pcm_lib.c:756
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3501 Comm: syzkaller879499 Not tainted 4.15.0-rc7+ #256
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:muldiv32 sound/core/pcm_lib.c:563 [inline]
RIP: 0010:snd_interval_mulkdiv+0x5a9/0x650 sound/core/pcm_lib.c:756
RSP: 0018:ffff8801c04c7478 EFLAGS: 00010293
RAX: ffff8801c05f43c0 RBX: ffff8801c04c7500 RCX: ffffffff841cb1f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000f4240
RBP: ffff8801c04c74c0 R08: 000000000000009c R09: ffffed00380bc5e3
R10: 0000000000000013 R11: ffffed00380bc5e2 R12: ffff8801c05e2ec0
R13: ffff8801c05e2eb4 R14: ffff8801c05e2ec8 R15: ffff8801c05e2ebc
 snd_pcm_hw_rule_mulkdiv+0xfd/0x1c0 sound/core/pcm_native.c:2040
 constrain_params_by_rules+0x625/0x11b0 sound/core/pcm_native.c:400
 snd_pcm_hw_refine+0x818/0x1070 sound/core/pcm_native.c:502
 snd_pcm_hw_refine_old_user sound/core/pcm_native.c:3612 [inline]
 snd_pcm_common_ioctl+0x7f9/0x1f60 sound/core/pcm_native.c:2922
 snd_pcm_ioctl+0x81/0xb0 sound/core/pcm_native.c:2959
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x443d79
RSP: 002b:00007ffe547ec708 EFLAGS: 00000286 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000443d79
RDX: 0000000020001f64 RSI: 00000000c1004110 RDI: 0000000000000003
RBP: 00000000006ce018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020005000 R11: 0000000000000286 R12: 0000000000401a60
R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (21):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/01/10 17:57 upstream cf1fb158230e 02a19b64 .config console log report syz C ci-upstream-kasan-gce
2018/01/10 17:58 mmots 69eed2290e1d 02a19b64 .config console log report syz C ci-upstream-mmots-kasan-gce
2018/01/10 17:58 linux-next b4464bcab38d 02a19b64 .config console log report syz C ci-upstream-next-kasan-gce
2018/01/16 19:18 upstream a8750ddca918 4198e588 .config console log report ci-upstream-kasan-gce
2018/01/16 10:55 upstream a8750ddca918 4198e588 .config console log report ci-upstream-kasan-gce
2018/01/16 03:52 upstream a8750ddca918 e17f4a5d .config console log report ci-upstream-kasan-gce
2018/01/16 02:29 upstream a8750ddca918 e17f4a5d .config console log report ci-upstream-kasan-gce
2018/01/15 21:31 upstream a8750ddca918 e17f4a5d .config console log report ci-upstream-kasan-gce
2018/01/15 19:10 upstream a8750ddca918 66d492a6 .config console log report ci-upstream-kasan-gce
2018/01/15 15:28 upstream a8750ddca918 66d492a6 .config console log report ci-upstream-kasan-gce
2018/01/15 05:03 upstream 9443c168505d 66d492a6 .config console log report ci-upstream-kasan-gce
2018/01/14 09:18 upstream 2c1cfa499018 c9e7aeae .config console log report ci-upstream-kasan-gce
2018/01/14 08:01 upstream 2c1cfa499018 c9e7aeae .config console log report ci-upstream-kasan-gce
2018/01/13 03:28 upstream c92a9a461dff 9dc808a6 .config console log report ci-upstream-kasan-gce
2018/01/12 18:06 upstream 1545dec46db3 9dc808a6 .config console log report ci-upstream-kasan-gce
2018/01/12 04:49 upstream 1545dec46db3 9dc808a6 .config console log report ci-upstream-kasan-gce
2018/01/13 01:28 mmots 2c405fa05106 9dc808a6 .config console log report ci-upstream-mmots-kasan-gce
2018/01/12 11:02 mmots 2c405fa05106 9dc808a6 .config console log report ci-upstream-mmots-kasan-gce
2018/01/12 03:42 linux-next 8418f8876404 9dc808a6 .config console log report ci-upstream-next-kasan-gce
2018/01/11 18:53 mmots 4147d50978df 9dc808a6 .config console log report ci-upstream-mmots-kasan-gce
2018/01/11 18:15 mmots 4147d50978df 9dc808a6 .config console log report ci-upstream-mmots-kasan-gce
* Struck through repros no longer work on HEAD.