BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 16717, name: syz-executor.4 3 locks held by syz-executor.4/16717: #0: 00000000e3405f76 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000e3405f76 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 0000000039ea1872 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000eef79e3f (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 1542 hardirqs last enabled at (1541): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (1541): [] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (1542): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1542): [] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:152 softirqs last enabled at (1484): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (1461): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1461): [] irq_exit+0x215/0x260 kernel/softirq.c:412 Preemption disabled at: [<0000000000000000>] (null) CPU: 1 PID: 16717 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 IPVS: ftp: loaded support on port[0] = 21 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd085232e99 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:00007fd083ba8168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007fd085345f60 RCX: 00007fd085232e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 00007fd08528cff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf64bae4f R14: 00007fd083ba8300 R15: 0000000000022000 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. IPVS: ftp: loaded support on port[0] = 21 FAT-fs (loop1): Unrecognized mount option "euid=00000000000000060929" or missing value BUG: sleeping function called from invalid context at mm/slab.h:422 in_atomic(): 1, irqs_disabled(): 1, pid: 16810, name: syz-executor.4 3 locks held by syz-executor.4/16810: #0: 00000000e2ec1539 (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2075 [inline] #0: 00000000e2ec1539 (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl+0x5d2/0x2b90 fs/eventpoll.c:1997 #1: 0000000039ea1872 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x91/0x110 drivers/media/v4l2-core/v4l2-mem2mem.c:1056 #2: 00000000613dfd54 (&(&q->done_lock)->rlock){....}, at: v4l2_m2m_poll+0x140/0x720 drivers/media/v4l2-core/v4l2-mem2mem.c:623 irq event stamp: 458 hardirqs last enabled at (457): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (457): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (458): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (458): [] _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: 16810 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: 0033:0x7fd085232e99 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:00007fd083b87168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00007fd085346030 RCX: 00007fd085232e99 RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 00007fd08528cff1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf64bae4f R14: 00007fd083b87300 R15: 0000000000022000 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. FAT-fs (loop1): Unrecognized mount option "euid=00000000000000060929" or missing value netlink: 20 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 76 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: ftp: loaded support on port[0] = 21 netlink: 76 bytes leftover after parsing attributes in process `syz-executor.4'. audit: type=1800 audit(1640257604.263:1205): pid=16973 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="SYSV00000000" dev="hugetlbfs" ino=131072 res=0 audit: type=1800 audit(1640257604.693:1206): pid=17008 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.2" name="SYSV00000000" dev="hugetlbfs" ino=163844 res=0 hfs: can't find a HFS filesystem on dev loop1 hfs: can't find a HFS filesystem on dev loop1 hfs: can't find a HFS filesystem on dev loop1 new mount options do not match the existing superblock, will be ignored tmpfs: No value for mount option './file0' new mount options do not match the existing superblock, will be ignored new mount options do not match the existing superblock, will be ignored libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error IPVS: ftp: loaded support on port[0] = 21 audit: type=1800 audit(1640257609.973:1207): pid=17280 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="file0" dev="sda1" ino=15905 res=0 audit: type=1804 audit(1640257609.983:1208): pid=17280 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir173643148/syzkaller.mTag8P/3694/file0" dev="sda1" ino=15905 res=1 new mount options do not match the existing superblock, will be ignored ceph: No mds server is up or the cluster is laggy audit: type=1800 audit(1640257610.353:1209): pid=17330 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="file0" dev="sda1" ino=15894 res=0 libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error ceph: No mds server is up or the cluster is laggy IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1640257610.383:1210): pid=17330 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir173643148/syzkaller.mTag8P/3695/file0" dev="sda1" ino=15894 res=1 new mount options do not match the existing superblock, will be ignored audit: type=1800 audit(1640257610.663:1211): pid=17402 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="file0" dev="sda1" ino=15252 res=0 audit: type=1804 audit(1640257610.693:1212): pid=17402 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir173643148/syzkaller.mTag8P/3696/file0" dev="sda1" ino=15252 res=1