BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 in_atomic(): 1, irqs_disabled(): 0, pid: 18308, name: blkid 1 lock held by blkid/18308: #0: 000000004ee26ae9 ((&sp->resync_t)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:168 [inline] #0: 000000004ee26ae9 ((&sp->resync_t)){+.-.}, at: call_timer_fn+0xda/0x720 kernel/time/timer.c:1316 Preemption disabled at: [] __do_softirq+0xf3/0x921 kernel/softirq.c:269 CPU: 0 PID: 18308 Comm: blkid Not tainted 4.19.100-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 ___might_sleep.cold+0x1bd/0x1f6 kernel/sched/core.c:6192 __might_sleep+0x95/0x190 kernel/sched/core.c:6145 __mutex_lock_common kernel/locking/mutex.c:908 [inline] __mutex_lock+0xc8/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:__do_sys_newfstatat+0x105/0x130 fs/stat.c:368 Code: 03 00 00 00 00 48 c7 43 14 00 00 00 00 c7 43 1c 00 00 00 00 48 8b 75 d0 65 48 33 34 25 28 00 00 00 75 2b 48 81 c4 20 01 00 00 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 e8 db 7d bd ff 48 8d bd e8 fe ff RSP: 0018:ffff88804567feb8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: fffffffffffffffe RBX: ffffed1008acffb3 RCX: ffffffff81ad865a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff88804567fee0 R08: ffff888095a966c0 R09: ffffed1015d04733 R10: ffffed1015d04732 R11: ffff8880ae823993 R12: fffffffffffffffe R13: 00007ffef4d0ad50 R14: 0000000000000004 R15: 00007f51f34a3e96 __se_sys_newfstatat fs/stat.c:358 [inline] __x64_sys_newfstatat+0x97/0xf0 fs/stat.c:358 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f51f31cce1a Code: 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 90 90 83 ff 01 89 f0 48 89 d6 77 1e 48 63 f8 4d 63 d0 48 89 ca b8 06 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 1a f3 c3 0f 1f 40 00 48 8b 05 e9 4f 2b 00 64 RSP: 002b:00007ffef4d0ad18 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00007ffef4d0adf0 RCX: 00007f51f31cce1a RDX: 00007ffef4d0ad50 RSI: 00007f51f34a3e96 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f51f34a3e96 R13: 00007ffef4d0ad50 R14: 00007f51f36ae820 R15: 00007f51f34a42a2 ================================ WARNING: inconsistent lock state 4.19.100-syzkaller #0 Tainted: G W -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. blkid/18308 [HC0[0]:SC1[1]:HE1:SE0] takes: 0000000095983315 (&tpk_port.port_write_mutex){+.?.}, at: tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 tnc_init drivers/net/hamradio/6pack.c:536 [inline] sixpack_open+0x9d3/0xbf5 drivers/net/hamradio/6pack.c:632 tty_ldisc_open.isra.0+0x89/0xd0 drivers/tty/tty_ldisc.c:469 tty_set_ldisc+0x2d7/0x690 drivers/tty/tty_ldisc.c:594 tiocsetd drivers/tty/tty_io.c:2359 [inline] tty_ioctl+0x65e/0x1510 drivers/tty/tty_io.c:2603 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 2672 hardirqs last enabled at (2672): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2671): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2390): [] __do_softirq+0x633/0x921 kernel/softirq.c:318 softirqs last disabled at (2587): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2587): [] irq_exit+0x180/0x1d0 kernel/softirq.c:412 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&tpk_port.port_write_mutex); lock(&tpk_port.port_write_mutex); *** DEADLOCK *** 1 lock held by blkid/18308: #0: 000000004ee26ae9 ((&sp->resync_t)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:168 [inline] #0: 000000004ee26ae9 ((&sp->resync_t)){+.-.}, at: call_timer_fn+0xda/0x720 kernel/time/timer.c:1316 stack backtrace: CPU: 0 PID: 18308 Comm: blkid Tainted: G W 4.19.100-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+0x197/0x210 lib/dump_stack.c:118 print_usage_bug.cold+0x330/0x42a kernel/locking/lockdep.c:2540 valid_state kernel/locking/lockdep.c:2553 [inline] mark_lock_irq kernel/locking/lockdep.c:2747 [inline] mark_lock+0xd1b/0x1370 kernel/locking/lockdep.c:3127 mark_irqflags kernel/locking/lockdep.c:3005 [inline] __lock_acquire+0xc62/0x49c0 kernel/locking/lockdep.c:3368 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:__do_sys_newfstatat+0x105/0x130 fs/stat.c:368 Code: 03 00 00 00 00 48 c7 43 14 00 00 00 00 c7 43 1c 00 00 00 00 48 8b 75 d0 65 48 33 34 25 28 00 00 00 75 2b 48 81 c4 20 01 00 00 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 e8 db 7d bd ff 48 8d bd e8 fe ff RSP: 0018:ffff88804567feb8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: fffffffffffffffe RBX: ffffed1008acffb3 RCX: ffffffff81ad865a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff88804567fee0 R08: ffff888095a966c0 R09: ffffed1015d04733 R10: ffffed1015d04732 R11: ffff8880ae823993 R12: fffffffffffffffe R13: 00007ffef4d0ad50 R14: 0000000000000004 R15: 00007f51f34a3e96 __se_sys_newfstatat fs/stat.c:358 [inline] __x64_sys_newfstatat+0x97/0xf0 fs/stat.c:358 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f51f31cce1a Code: 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 90 90 83 ff 01 89 f0 48 89 d6 77 1e 48 63 f8 4d 63 d0 48 89 ca b8 06 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 1a f3 c3 0f 1f 40 00 48 8b 05 e9 4f 2b 00 64 RSP: 002b:00007ffef4d0ad18 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00007ffef4d0adf0 RCX: 00007f51f31cce1a RDX: 00007ffef4d0ad50 RSI: 00007f51f34a3e96 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f51f34a3e96 R13: 00007ffef4d0ad50 R14: 00007f51f36ae820 R15: 00007f51f34a42a2 BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 in_atomic(): 1, irqs_disabled(): 0, pid: 10540, name: syz-executor.1 INFO: lockdep is turned off. Preemption disabled at: [] __do_softirq+0xf3/0x921 kernel/softirq.c:269 CPU: 0 PID: 10540 Comm: syz-executor.1 Tainted: G W 4.19.100-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+0x197/0x210 lib/dump_stack.c:118 ___might_sleep.cold+0x1bd/0x1f6 kernel/sched/core.c:6192 __might_sleep+0x95/0x190 kernel/sched/core.c:6145 __mutex_lock_common kernel/locking/mutex.c:908 [inline] __mutex_lock+0xc8/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:123 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:save_stack_address arch/x86/kernel/stacktrace.c:30 [inline] RIP: 0010:save_stack_address+0x2c/0x60 arch/x86/kernel/stacktrace.c:15 Code: d2 48 89 e5 41 54 49 89 f4 53 48 89 fb 75 2f 8b 43 10 85 c0 7f 1b 8b 03 3b 43 04 73 38 48 8b 53 08 8d 48 01 89 0b 4c 89 24 c2 <31> c0 5b 41 5c 5d c3 83 e8 01 89 43 10 5b 31 c0 41 5c 5d c3 48 89 RSP: 0018:ffff8880440bf5b8 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: ffff8880440bf680 RCX: 0000000000000004 RDX: ffff8880440bf698 RSI: ffffffff81a2611c RDI: ffff8880440bf680 RBP: ffff8880440bf5c8 R08: 0000000000000001 R09: ffff8880440bf630 R10: ffff8880440bf600 R11: ffff8880440bf610 R12: ffffffff81a2611c R13: 0000000000000000 R14: ffff88804a3525c0 R15: ffff88812c31c340 __save_stack_trace+0x73/0x100 arch/x86/kernel/stacktrace.c:46 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:490 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node_trace+0x13c/0x720 mm/slab.c:3666 kmalloc_node include/linux/slab.h:553 [inline] kzalloc_node include/linux/slab.h:720 [inline] __get_vm_area_node+0x12b/0x3a0 mm/vmalloc.c:1393 __vmalloc_node_range+0xc7/0x790 mm/vmalloc.c:1745 __vmalloc_node mm/vmalloc.c:1801 [inline] __vmalloc_node_flags mm/vmalloc.c:1815 [inline] vzalloc+0x6b/0x90 mm/vmalloc.c:1854 alloc_counters.isra.0+0x53/0x690 net/ipv6/netfilter/ip6_tables.c:819 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:841 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1044 [inline] do_ip6t_get_ctl+0x4fc/0x960 net/ipv6/netfilter/ip6_tables.c:1712 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x7a/0xd0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt net/ipv6/ipv6_sockglue.c:1381 [inline] ipv6_getsockopt+0x205/0x280 net/ipv6/ipv6_sockglue.c:1361 tcp_getsockopt net/ipv4/tcp.c:3597 [inline] tcp_getsockopt+0x8f/0xe0 net/ipv4/tcp.c:3591 sock_common_getsockopt+0x94/0xd0 net/core/sock.c:3005 __sys_getsockopt+0x15f/0x240 net/socket.c:1938 __do_sys_getsockopt net/socket.c:1949 [inline] __se_sys_getsockopt net/socket.c:1946 [inline] __x64_sys_getsockopt+0xbe/0x150 net/socket.c:1946 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45de5a Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d 8b fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 6a 8b fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffc5fd44c28 EFLAGS: 00000216 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffc5fd44c50 RCX: 000000000045de5a RDX: 0000000000000041 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000071bcc0 R08: 00007ffc5fd44c4c R09: 0000000000004000 R10: 00007ffc5fd44d50 R11: 0000000000000216 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000029 R15: 000000000071a1c0