suspicious RCU usage at sound/core/pcm_lib.c:LINE
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syzbot
Jan 4, 2018, 7:03:03 AM1/4/18
to alsa-...@alsa-project.org, linux-...@vger.kernel.org, mi...@kernel.org, o-ta...@sakamocchi.jp, pe...@perex.cz, syzkall...@googlegroups.com, ti...@suse.com
Hello,
syzkaller hit the following crash on
ad036b63ee57df9ab802a4eb20cbbbec66aa4520
git://git.cmpxchg.org/linux-mmots.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
Unfortunately, I don't have any reproducer for this bug yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+993cb4...@syzkaller.appspotmail.com
It will help syzbot understand when the bug is fixed. See footer for
details.
If you forward the report, please keep this part and the footer.
=============================
WARNING: suspicious RCU usage
4.15.0-rc6-mm1+ #50 Not tainted
kauditd_printk_skb: 75 callbacks suppressed
audit: type=1326 audit(1514976425.195:283): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.196:284): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=8 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.196:285): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.196:286): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=9 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.199:287): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.202:288): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=257 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.203:289): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.203:290): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.240:291): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=317 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.240:292): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
WARNING: CPU: 0 PID: 6848 at sound/core/pcm_lib.c:1635
snd_pcm_hw_param_first+0x289/0x690 sound/core/pcm_lib.c:1635
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 6848 Comm: syz-executor4 Not tainted 4.15.0-rc6-mm1+ #50
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+0x137/0x198 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+0x249/0x290 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:snd_pcm_hw_param_first+0x289/0x690 sound/core/pcm_lib.c:1635
RSP: 0018:ffff8801d5367950 EFLAGS: 00010216
RAX: 0000000000010000 RBX: ffff8801c18936c0 RCX: ffffffff83b45549
RDX: 00000000000018c6 RSI: ffffc90003dcc000 RDI: ffff8801c18936e8
RBP: ffff8801d53679a0 R08: ffffed003aa6ce99 R09: ffff8801d53674c0
R10: 0000000000000001 R11: ffffed003aa6ce98 R12: 000000000000000d
R13: 00000000ffffffea R14: 0000000000000005 R15: 0000000000002000
snd_pcm_hw_param_near.constprop.28+0x66e/0x790 sound/core/oss/pcm_oss.c:457
snd_pcm_oss_change_params+0x1513/0x3210 sound/core/oss/pcm_oss.c:969
snd_pcm_oss_make_ready+0xaa/0x130 sound/core/oss/pcm_oss.c:1128
snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1436 [inline]
snd_pcm_oss_read+0x161/0x5c0 sound/core/oss/pcm_oss.c:2623
__vfs_read+0xef/0x730 fs/read_write.c:411
vfs_read+0x11e/0x350 fs/read_write.c:447
SYSC_read fs/read_write.c:573 [inline]
SyS_read+0xd4/0x1a0 fs/read_write.c:566
entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007fc02c6cac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fc02c6cb700 RCX: 0000000000452ac9
RDX: 0000000000000099 RSI: 0000000020aebf67 RDI: 0000000000000013
RBP: 0000000000a2f870 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007fc02c6cb9c0 R15: 0000000000000002
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzk...@googlegroups.com.
syzbot will keep track of this bug report.
If you forgot to add the Reported-by tag, once the fix for this bug is
merged
into any tree, please reply to this email with:
#syz fix: exact-commit-title
To mark this as a duplicate of another syzbot report, please reply with:
#syz dup: exact-subject-of-another-report
If it's a one-off invalid bug report, please reply with:
#syz invalid
Note: if the crash happens again, it will cause creation of a new bug
report.
Note: all commands must start from beginning of the line in the email body.
syzkaller hit the following crash on
ad036b63ee57df9ab802a4eb20cbbbec66aa4520
git://git.cmpxchg.org/linux-mmots.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
Unfortunately, I don't have any reproducer for this bug yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+993cb4...@syzkaller.appspotmail.com
It will help syzbot understand when the bug is fixed. See footer for
details.
If you forward the report, please keep this part and the footer.
=============================
WARNING: suspicious RCU usage
4.15.0-rc6-mm1+ #50 Not tainted
kauditd_printk_skb: 75 callbacks suppressed
audit: type=1326 audit(1514976425.195:283): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.196:284): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=8 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.196:285): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.196:286): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=9 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.199:287): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.202:288): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=257 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.203:289): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.203:290): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.240:291): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=317 compat=0 ip=0x452ac9 code=0x7ffc0000
audit: type=1326 audit(1514976425.240:292): auid=4294967295 uid=0 gid=0
ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6814
comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e
syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000
WARNING: CPU: 0 PID: 6848 at sound/core/pcm_lib.c:1635
snd_pcm_hw_param_first+0x289/0x690 sound/core/pcm_lib.c:1635
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 6848 Comm: syz-executor4 Not tainted 4.15.0-rc6-mm1+ #50
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+0x137/0x198 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+0x249/0x290 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:snd_pcm_hw_param_first+0x289/0x690 sound/core/pcm_lib.c:1635
RSP: 0018:ffff8801d5367950 EFLAGS: 00010216
RAX: 0000000000010000 RBX: ffff8801c18936c0 RCX: ffffffff83b45549
RDX: 00000000000018c6 RSI: ffffc90003dcc000 RDI: ffff8801c18936e8
RBP: ffff8801d53679a0 R08: ffffed003aa6ce99 R09: ffff8801d53674c0
R10: 0000000000000001 R11: ffffed003aa6ce98 R12: 000000000000000d
R13: 00000000ffffffea R14: 0000000000000005 R15: 0000000000002000
snd_pcm_hw_param_near.constprop.28+0x66e/0x790 sound/core/oss/pcm_oss.c:457
snd_pcm_oss_change_params+0x1513/0x3210 sound/core/oss/pcm_oss.c:969
snd_pcm_oss_make_ready+0xaa/0x130 sound/core/oss/pcm_oss.c:1128
snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1436 [inline]
snd_pcm_oss_read+0x161/0x5c0 sound/core/oss/pcm_oss.c:2623
__vfs_read+0xef/0x730 fs/read_write.c:411
vfs_read+0x11e/0x350 fs/read_write.c:447
SYSC_read fs/read_write.c:573 [inline]
SyS_read+0xd4/0x1a0 fs/read_write.c:566
entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007fc02c6cac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fc02c6cb700 RCX: 0000000000452ac9
RDX: 0000000000000099 RSI: 0000000020aebf67 RDI: 0000000000000013
RBP: 0000000000a2f870 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007fc02c6cb9c0 R15: 0000000000000002
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzk...@googlegroups.com.
syzbot will keep track of this bug report.
If you forgot to add the Reported-by tag, once the fix for this bug is
merged
into any tree, please reply to this email with:
#syz fix: exact-commit-title
To mark this as a duplicate of another syzbot report, please reply with:
#syz dup: exact-subject-of-another-report
If it's a one-off invalid bug report, please reply with:
#syz invalid
Note: if the crash happens again, it will cause creation of a new bug
report.
Note: all commands must start from beginning of the line in the email body.
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