BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 10779, name: syz-executor.4 3 locks held by syz-executor.4/10779: #0: 00000000f5b8568b (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000f5b8568b (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 00000000e763e076 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000a6e9e61a (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 146 hardirqs last enabled at (145): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (145): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (146): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (146): [] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (0): [<0000000000000000>] (null) Preemption disabled at: [<0000000000000000>] (null) CPU: 0 PID: 10779 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6192 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x26d/0x370 mm/slab.c:3557 ep_ptable_queue_proc+0xaf/0x390 fs/eventpoll.c:1242 poll_wait include/linux/poll.h:51 [inline] v4l2_m2m_poll+0x633/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:625 v4l2_m2m_fop_poll+0xa4/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1058 v4l2_poll+0x146/0x1f0 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0x14a/0x3e0 fs/eventpoll.c:890 ep_insert fs/eventpoll.c:1479 [inline] __do_sys_epoll_ctl fs/eventpoll.c:2112 [inline] __se_sys_epoll_ctl+0x1b04/0x2b90 fs/eventpoll.c:1997 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4474eefe99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4473844168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f4475003030 RCX: 00007f4474eefe99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000013 RBP: 00007f4474f49ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecfd245cf R14: 00007f4473844300 R15: 0000000000022000 overlayfs: unrecognized mount option "uÿworkdiSÈr=./file1" or missing value tmpfs: Bad value 'm5m5e%«Î[ÁÅt_hash' for mount option 'nr_blocks' ntfs: volume version 3.1. overlayfs: unrecognized mount option "uÿworkdiSÈr=./file1" or missing value BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 10914, name: syz-executor.4 tmpfs: Bad value 'm5m5e%«Î[ÁÅt_hash' for mount option 'nr_blocks' 3 locks held by syz-executor.4/10914: #0: 0000000090d31535 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 0000000090d31535 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 00000000e763e076 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000aab3fd5f (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 96 hardirqs last enabled at (95): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (95): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (96): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (96): [] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (0): [<0000000000000000>] (null) Preemption disabled at: [<0000000000000000>] (null) CPU: 1 PID: 10914 Comm: syz-executor.4 Tainted: G W 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6192 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x26d/0x370 mm/slab.c:3557 ep_ptable_queue_proc+0xaf/0x390 fs/eventpoll.c:1242 poll_wait include/linux/poll.h:51 [inline] v4l2_m2m_poll+0x633/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:625 v4l2_m2m_fop_poll+0xa4/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1058 v4l2_poll+0x146/0x1f0 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0x14a/0x3e0 fs/eventpoll.c:890 ep_insert fs/eventpoll.c:1479 [inline] __do_sys_epoll_ctl fs/eventpoll.c:2112 [inline] __se_sys_epoll_ctl+0x1b04/0x2b90 fs/eventpoll.c:1997 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4474eefe99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4473844168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007f4475003030 RCX: 00007f4474eefe99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000013 RBP: 00007f4474f49ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecfd245cf R14: 00007f4473844300 R15: 0000000000022000 audit: type=1804 audit(1640883159.344:29): pid=10975 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/23/bus" dev="sda1" ino=14023 res=1 ntfs: volume version 3.1. audit: type=1804 audit(1640883159.384:30): pid=10975 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/23/bus" dev="sda1" ino=14023 res=1 audit: type=1804 audit(1640883159.444:31): pid=10975 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/23/bus" dev="sda1" ino=14023 res=1 audit: type=1804 audit(1640883159.514:32): pid=10980 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/23/bus" dev="sda1" ino=14023 res=1 audit: type=1804 audit(1640883160.344:33): pid=10994 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/24/bus" dev="sda1" ino=14023 res=1 overlayfs: unrecognized mount option "uÿworkdiSÈr=./file1" or missing value Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! File: /root/syzkaller-testdir180081407/syzkaller.kzQWcH/24/bus PID: 10994 Comm: syz-executor.5 ntfs: volume version 3.1. audit: type=1804 audit(1640883160.384:34): pid=10994 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/24/bus" dev="sda1" ino=14023 res=1 tmpfs: Bad value 'm5m5e%«Î[ÁÅt_hash' for mount option 'nr_blocks' audit: type=1804 audit(1640883160.414:35): pid=10994 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/24/bus" dev="sda1" ino=14023 res=1 ubi0: attaching mtd0 audit: type=1804 audit(1640883160.484:36): pid=11007 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir180081407/syzkaller.kzQWcH/24/bus" dev="sda1" ino=14023 res=1 audit: type=1804 audit(1640883160.494:37): pid=11006 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir838450720/syzkaller.iJA2WB/21/bus" dev="sda1" ino=14027 res=1 audit: type=1804 audit(1640883160.514:38): pid=11006 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir838450720/syzkaller.iJA2WB/21/bus" dev="sda1" ino=14027 res=1 ubi0: scanning is finished ubi0: empty MTD device detected ubi0: attached mtd0 (name "mtdram test device", size 0 MiB) ubi0: PEB size: 4096 bytes (4 KiB), LEB size: 3968 bytes ubi0: min./max. I/O unit sizes: 1/64, sub-page size 1 ubi0: VID header offset: 64 (aligned 64), data offset: 128 ubi0: good PEBs: 32, bad PEBs: 0, corrupted PEBs: 0 ubi0: user volume: 0, internal volumes: 1, max. volumes count: 23 ubi0: max/mean erase counter: 0/0, WL threshold: 4096, image sequence number: 1052256884 ubi0: available PEBs: 28, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0 ubi0: background thread "ubi_bgt0d" started, PID 11101 ubi0: detaching mtd0 ubi0: mtd0 is detached EXT4-fs (loop0): Unrecognized mount option "/xRªOÓ([ý‡²"­" or missing value ubi0: attaching mtd0 ubi0: scanning is finished ubi0 error: ubi_attach_mtd_dev: cannot spawn "ubi_bgt0d", error -4 EXT4-fs (loop0): Unrecognized mount option "/xRªOÓ([ý‡²"­" or missing value FAT-fs (loop3): bogus number of reserved sectors EXT4-fs (loop0): Unrecognized mount option "/xRªOÓ([ý‡²"­" or missing value FAT-fs (loop3): Can't find a valid FAT filesystem ubi0: attaching mtd0 ubi0: scanning is finished ubi0: attached mtd0 (name "mtdram test device", size 0 MiB) ubi0: PEB size: 4096 bytes (4 KiB), LEB size: 3968 bytes ubi0: min./max. I/O unit sizes: 1/64, sub-page size 1 ubi0: VID header offset: 64 (aligned 64), data offset: 128 ubi0: good PEBs: 32, bad PEBs: 0, corrupted PEBs: 0 ubi0: user volume: 0, internal volumes: 1, max. volumes count: 23 ubi0: max/mean erase counter: 1/1, WL threshold: 4096, image sequence number: 1052256884 FAT-fs (loop3): bogus number of reserved sectors ubi0: available PEBs: 28, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0 ubi0: background thread "ubi_bgt0d" started, PID 11237 FAT-fs (loop3): Can't find a valid FAT filesystem ubi0: detaching mtd0 ubi0: mtd0 is detached ubi0: attaching mtd0 ubi0: scanning is finished FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem ubi0: attached mtd0 (name "mtdram test device", size 0 MiB) ubi0: PEB size: 4096 bytes (4 KiB), LEB size: 3968 bytes ubi0: min./max. I/O unit sizes: 1/64, sub-page size 1 ubi0: VID header offset: 64 (aligned 64), data offset: 128 FAT-fs (loop3): bogus number of reserved sectors ubi0: good PEBs: 32, bad PEBs: 0, corrupted PEBs: 0 ubi0: user volume: 0, internal volumes: 1, max. volumes count: 23 FAT-fs (loop3): Can't find a valid FAT filesystem ubi0: max/mean erase counter: 1/1, WL threshold: 4096, image sequence number: 1052256884 ubi0: available PEBs: 28, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0 ubi0: background thread "ubi_bgt0d" started, PID 11286 tmpfs: No value for mount option '/dev/nbd4'