audit: type=1400 audit(1561339044.199:58): avc: denied { map } for pid=11333 comm="syz-executor.5" path="/dev/dsp" dev="devtmpfs" ino=15512 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop0' (ffff888065384220): kobject_uevent_env
Modules linked in:
CPU: 1 PID: 11343 Comm: syz-executor.1 Not tainted 4.14.129 #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805a8262c0 task.stack: ffff88805ce78000
RIP: 0010:__read_once_size include/linux/compiler.h:186 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:refcount_sub_and_test+0x2b/0xf0 lib/refcount.c:179
RSP: 0018:ffff88805ce7fb98 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88809da2a7c0 RCX: ffffffff8424d050
RDX: 0000000000000004 RSI: 0000000000000020 RDI: 0000000000000001
RBP: ffff88805ce7fbc0 R08: 00000000f974ac1a R09: ffff88805a826b88
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000020
R13: 0000000000000001 R14: ffff88809da2a7d4 R15: 0000000000000000
FS: 0000000000cc9940(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c322000 CR3: 000000009083d000 CR4: 00000000001406e0
Call Trace:
refcount_dec_and_test+0x1b/0x20 lib/refcount.c:212
vb2_vmalloc_put+0x18/0x70 drivers/media/v4l2-core/videobuf2-vmalloc.c:68
__vb2_buf_mem_free+0x103/0x1e0 drivers/media/v4l2-core/videobuf2-core.c:240
__vb2_free_mem drivers/media/v4l2-core/videobuf2-core.c:409 [inline]
__vb2_queue_free+0x634/0x7d0 drivers/media/v4l2-core/videobuf2-core.c:454
kobject: 'loop0' (ffff888065384220): fill_kobj_path: path = '/devices/virtual/block/loop0'
vb2_core_queue_release+0x64/0x80 drivers/media/v4l2-core/videobuf2-core.c:2043
vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:669 [inline]
_vb2_fop_release+0x1cf/0x2a0 drivers/media/v4l2-core/videobuf2-v4l2.c:840
vb2_fop_release+0x75/0xc0 drivers/media/v4l2-core/videobuf2-v4l2.c:854
kobject: 'loop0' (ffff888065384220): kobject_uevent_env
vivid_fop_release+0x180/0x3f0 drivers/media/platform/vivid/vivid-core.c:486
kobject: 'loop0' (ffff888065384220): fill_kobj_path: path = '/devices/virtual/block/loop0'
v4l2_release+0xf9/0x190 drivers/media/v4l2-core/v4l2-dev.c:446
__fput+0x275/0x7a0 fs/file_table.c:210
____fput+0x16/0x20 fs/file_table.c:244
task_work_run+0x114/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
kobject: 'loop4' (ffff8880a4abf2e0): kobject_uevent_env
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x412fb1
kobject: 'loop4' (ffff8880a4abf2e0): fill_kobj_path: path = '/devices/virtual/block/loop4'
RSP: 002b:00007ffedb621bd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000412fb1
RDX: 0000001b2c420000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 000000006e783fbb R09: 000000006e783fbf
R10: 00007ffedb621cb0 R11: 0000000000000293 R12: 00000000007613d0
R13: 000000000003cf9b R14: 000000000003cfc8 R15: 000000000075bf2c
Code: 55 48 89 e5 41 56 41 55 41 89 fd 41 54 49 89 f4 53 48 83 ec 08 e8 e6 b4 85 fe 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85
RIP: __read_once_size include/linux/compiler.h:186 [inline] RSP: ffff88805ce7fb98
RIP: atomic_read arch/x86/include/asm/atomic.h:27 [inline] RSP: ffff88805ce7fb98
RIP: refcount_sub_and_test+0x2b/0xf0 lib/refcount.c:179 RSP: ffff88805ce7fb98
---[ end trace 61b572b172860ce3 ]---