BUG: sleeping function called from invalid context at kernel/locking/mutex.c:938 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 13589, name: syz-executor680 2 locks held by syz-executor680/13589: #0: ffff88808d52b198 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88808d52b198 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xd80 arch/x86/mm/fault.c:1506 #1: ffffc90000da8d50 ((&sp->resync_t)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline] #1: ffffc90000da8d50 ((&sp->resync_t)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394 Preemption disabled at: [] __do_softirq+0xf3/0x98c kernel/softirq.c:269 CPU: 1 PID: 13589 Comm: syz-executor680 Not tainted 5.4.0-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+0x1fb/0x23e kernel/sched/core.c:6800 __might_sleep+0x95/0x190 kernel/sched/core.c:6753 __mutex_lock_common kernel/locking/mutex.c:938 [inline] __mutex_lock+0xc5/0x13c0 kernel/locking/mutex.c:1106 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1121 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:122 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:update_stack_state+0x48c/0x5f0 arch/x86/kernel/unwind_frame.c:239 Code: 01 00 0f 85 12 01 00 00 4d 8b 24 24 e9 b0 fe ff ff 49 8d 7d 38 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 <0f> 85 e0 00 00 00 48 8b 85 68 ff ff ff 49 c7 45 58 00 00 00 00 49 RSP: 0000:ffffc9001038f5d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffc9001038fad0 RCX: 1ffff92002071ef7 RDX: 0000000000000010 RSI: 1ffff92002071e00 RDI: ffffc9001038f7b8 RBP: ffffc9001038f698 R08: ffff88808481c380 R09: ffffc9001038f7d8 R10: ffffc9001038f7a8 R11: ffffc9001038f7b8 R12: ffffc9001038f770 R13: ffffc9001038f780 R14: 1ffff92002071ec2 R15: ffffc9001038f7c0 unwind_next_frame.part.0+0x1a9/0xa20 arch/x86/kernel/unwind_frame.c:311 unwind_next_frame+0x3b/0x50 arch/x86/kernel/unwind_frame.c:265 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123 save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:521 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x121/0x710 mm/slab.c:3484 anon_vma_chain_alloc mm/rmap.c:130 [inline] __anon_vma_prepare+0x62/0x3c0 mm/rmap.c:184 anon_vma_prepare include/linux/rmap.h:153 [inline] do_huge_pmd_anonymous_page+0x132f/0x1a50 mm/huge_memory.c:714 create_huge_pmd mm/memory.c:3836 [inline] __handle_mm_fault+0x3073/0x3da0 mm/memory.c:4046 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4112 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x536/0xd80 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0033:0x400daf Code: 00 20 ba 23 54 00 00 bf 10 00 00 00 31 c0 e8 f8 59 04 00 eb bb 66 0f 1f 44 00 00 48 b8 2f 64 65 76 2f 74 74 79 45 31 c0 31 c9 <48> 89 04 25 40 15 00 20 b8 74 6b 00 00 c7 04 25 48 15 00 20 70 72 RSP: 002b:00007f9081c00dc0 EFLAGS: 00010246 RAX: 7974742f7665642f RBX: 00000000006dbc28 RCX: 0000000000000000 RDX: 00000000004467a9 RSI: 0000000000000081 RDI: 00000000006dbc2c RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007ffd73ac136f R14: 00007f9081c019c0 R15: 0000000000000000 ================================ WARNING: inconsistent lock state 5.4.0-syzkaller #0 Tainted: G W -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor680/13589 [HC0[0]:SC1[1]:HE1:SE0] takes: ffffffff8c112af0 (&tpk_port.port_write_mutex){+.?.}, at: tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:122 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4485 __mutex_lock_common kernel/locking/mutex.c:959 [inline] __mutex_lock+0x156/0x13c0 kernel/locking/mutex.c:1106 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1121 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:122 tnc_init drivers/net/hamradio/6pack.c:536 [inline] sixpack_open+0x8d6/0xaaf drivers/net/hamradio/6pack.c:632 tty_ldisc_open.isra.0+0xa3/0x110 drivers/tty/tty_ldisc.c:464 tty_set_ldisc+0x30e/0x6b0 drivers/tty/tty_ldisc.c:591 tiocsetd drivers/tty/tty_io.c:2337 [inline] tty_ioctl+0xe8d/0x14f0 drivers/tty/tty_io.c:2597 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 386 hardirqs last enabled at (386): [] trace_hardirqs_on_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:41 hardirqs last disabled at (385): [] trace_hardirqs_off_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:42 softirqs last enabled at (72): [] memcpy include/linux/string.h:380 [inline] softirqs last enabled at (72): [] fpu__copy+0x17e/0x8c0 arch/x86/kernel/fpu/core.c:195 softirqs last disabled at (291): [] invoke_softirq kernel/softirq.c:373 [inline] softirqs last disabled at (291): [] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 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 *** 2 locks held by syz-executor680/13589: #0: ffff88808d52b198 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88808d52b198 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xd80 arch/x86/mm/fault.c:1506 #1: ffffc90000da8d50 ((&sp->resync_t)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:172 [inline] #1: ffffc90000da8d50 ((&sp->resync_t)){+.-.}, at: call_timer_fn+0xe0/0x780 kernel/time/timer.c:1394 stack backtrace: CPU: 1 PID: 13589 Comm: syz-executor680 Tainted: G W 5.4.0-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+0x327/0x378 kernel/locking/lockdep.c:3101 valid_state kernel/locking/lockdep.c:3112 [inline] mark_lock_irq kernel/locking/lockdep.c:3309 [inline] mark_lock+0xbb4/0x1220 kernel/locking/lockdep.c:3666 mark_usage kernel/locking/lockdep.c:3566 [inline] __lock_acquire+0x1e8e/0x4a00 kernel/locking/lockdep.c:3909 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4485 __mutex_lock_common kernel/locking/mutex.c:959 [inline] __mutex_lock+0x156/0x13c0 kernel/locking/mutex.c:1106 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1121 tpk_write+0x5d/0x340 drivers/char/ttyprintk.c:122 resync_tnc+0x1b6/0x320 drivers/net/hamradio/6pack.c:522 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:update_stack_state+0x48c/0x5f0 arch/x86/kernel/unwind_frame.c:239 Code: 01 00 0f 85 12 01 00 00 4d 8b 24 24 e9 b0 fe ff ff 49 8d 7d 38 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 <0f> 85 e0 00 00 00 48 8b 85 68 ff ff ff 49 c7 45 58 00 00 00 00 49 RSP: 0000:ffffc9001038f5d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffc9001038fad0 RCX: 1ffff92002071ef7 RDX: 0000000000000010 RSI: 1ffff92002071e00 RDI: ffffc9001038f7b8 RBP: ffffc9001038f698 R08: ffff88808481c380 R09: ffffc9001038f7d8 R10: ffffc9001038f7a8 R11: ffffc9001038f7b8 R12: ffffc9001038f770 R13: ffffc9001038f780 R14: 1ffff92002071ec2 R15: ffffc9001038f7c0 unwind_next_frame.part.0+0x1a9/0xa20 arch/x86/kernel/unwind_frame.c:311 unwind_next_frame+0x3b/0x50 arch/x86/kernel/unwind_frame.c:265 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123 save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:521 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x121/0x710 mm/slab.c:3484 anon_vma_chain_alloc mm/rmap.c:130 [inline] __anon_vma_prepare+0x62/0x3c0 mm/rmap.c:184 anon_vma_prepare include/linux/rmap.h:153 [inline] do_huge_pmd_anonymous_page+0x132f/0x1a50 mm/huge_memory.c:714 create_huge_pmd mm/memory.c:3836 [inline] __handle_mm_fault+0x3073/0x3da0 mm/memory.c:4046 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4112 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x536/0xd80 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0033:0x400daf Code: 00 20 ba 23 54 00 00 bf 10 00 00 00 31 c0 e8 f8 59 04 00 eb bb 66 0f 1f 44 00 00 48 b8 2f 64 65 76 2f 74 74 79 45 31 c0 31 c9 <48> 89 04 25 40 15 00 20 b8 74 6b 00 00 c7 04 25 48 15 00 20 70 72 RSP: 002b:00007f9081c00dc0 EFLAGS: 00010246 RAX: 7974742f7665642f RBX: 00000000006dbc28 RCX: 0000000000000000 RDX: 00000000004467a9 RSI: 0000000000000081 RDI: 00000000006dbc2c RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007ffd73ac136f R14: 00007f9081c019c0 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 13589 at kernel/locking/mutex.c:737 mutex_unlock+0x1d/0x30 kernel/locking/mutex.c:744