hrtimer: interrupt took 37012 ns INFO: task syz-executor962:8110 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor962 D28536 8110 8109 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0033:0x7f9ed6c2ad30 Code: Bad RIP value. RSP: 002b:00007ffca7b2dc68 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000064 RCX: 0000000000000000 RDX: 00007ffca7b2dc80 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000032 R08: 00007ffca7bd3000 R09: 0000008062bbd76d R10: 001a140d3c870080 R11: 0000000000000001 R12: 00007f9ed6c7141c R13: 00007ffca7b2dcd0 R14: 00007ffca7b2dcf0 R15: 0000000000000001 INFO: task syz-executor962:8111 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor962 D27416 8111 8109 0x80000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 exit_mm kernel/exit.c:512 [inline] do_exit+0x6e4/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9ed6be9b89 Code: Bad RIP value. RSP: 002b:00007f9ed6b9b2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: fffffffffffffffc RBX: 0000000000000009 RCX: 00007f9ed6be9b89 RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000020341000 RBP: 00007f9ed6c71408 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 00007f9ed6c71400 R13: 00007f9ed6c3f074 R14: 0000000000000000 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 00000000f54e9854 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7794: #0: 00000000479760d1 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor962/8110: #0: 000000004833c0f3 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 1 lock held by syz-executor962/8111: #0: 000000004833c0f3 (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:512 [inline] #0: 000000004833c0f3 (&mm->mmap_sem){++++}, at: do_exit+0x6e4/0x2be0 kernel/exit.c:857 1 lock held by syz-executor962/8112: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1569 Comm: khungtaskd 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 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8112 Comm: syz-executor962 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:separate_irq_context kernel/locking/lockdep.c:3059 [inline] RIP: 0010:__lock_acquire+0x7f0/0x3ff0 kernel/locking/lockdep.c:3407 Code: 14 92 48 8d 6c d6 d8 48 ba 00 00 00 00 00 fc ff df 48 8d 7d 21 48 89 f9 48 c1 e9 03 0f b6 14 11 48 89 f9 83 e1 07 38 ca 7f 08 <84> d2 0f 85 c9 26 00 00 49 8d 7a 21 0f b6 6d 21 48 ba 00 00 00 00 RSP: 0018:ffff8880b0caf770 EFLAGS: 00000097 RAX: 00000000000005d0 RBX: 3f15d94582dca06a RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff8880b01a2888 RDI: ffff8880b01a28a9 RBP: ffff8880b01a2888 R08: 00000000000005d0 R09: 0000000000000001 R10: ffff8880b01a28b0 R11: 0000000000000000 R12: 00000000000405d0 R13: ffff8880b01a2000 R14: ffff8880b01a28c8 R15: 0000000000000000 FS: 00007f9ed6b7a700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555c192b8 CR3: 00000000ab842000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 perf_mmap+0x693/0x1810 kernel/events/core.c:5713 call_mmap include/linux/fs.h:1826 [inline] mmap_region+0xc94/0x16b0 mm/mmap.c:1757 do_mmap+0x8e8/0x1080 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2329 [inline] vm_mmap_pgoff+0x197/0x200 mm/util.c:357 ksys_mmap_pgoff+0x298/0x5a0 mm/mmap.c:1580 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9ed6be9b89 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9ed6b7a2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9ed6be9b89 RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000020395000 RBP: 00007f9ed6c71418 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 00007f9ed6c71410 R13: 00007f9ed6c3f074 R14: 00007f9ed6c6f130 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 14 92 adc $0x92,%al 2: 48 8d 6c d6 d8 lea -0x28(%rsi,%rdx,8),%rbp 7: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx e: fc ff df 11: 48 8d 7d 21 lea 0x21(%rbp),%rdi 15: 48 89 f9 mov %rdi,%rcx 18: 48 c1 e9 03 shr $0x3,%rcx 1c: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx 20: 48 89 f9 mov %rdi,%rcx 23: 83 e1 07 and $0x7,%ecx 26: 38 ca cmp %cl,%dl 28: 7f 08 jg 0x32 * 2a: 84 d2 test %dl,%dl <-- trapping instruction 2c: 0f 85 c9 26 00 00 jne 0x26fb 32: 49 8d 7a 21 lea 0x21(%r10),%rdi 36: 0f b6 6d 21 movzbl 0x21(%rbp),%ebp 3a: 48 rex.W 3b: ba 00 00 00 00 mov $0x0,%edx