INFO: task syz-executor573:19900 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-executor573 D28648 19900 8095 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] context_switch kernel/sched/core.c:2828 [inline] kernel/sched/core.c:3517 __schedule+0x887/0x2040 kernel/sched/core.c:3517 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] kernel/locking/rwsem-xadd.c:309 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __down_read arch/x86/include/asm/rwsem.h:83 [inline] kernel/locking/rwsem.c:26 down_read+0x44/0x80 kernel/locking/rwsem.c:26 kernel/locking/rwsem.c:26 __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 arch/x86/mm/fault.c:1348 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 arch/x86/entry/entry_64.S:1205 RIP: 0033:0x7f3efcd7fd98 Code: Bad RIP value. RSP: 002b:00007fffba70d778 EFLAGS: 00010202 RAX: 00007f3efcdb1bd0 RBX: 00007f3efcdb0198 RCX: 0000000000000001 RDX: 00007f3efccedb90 RSI: 0000000000000000 RDI: 00007f3efcdb1bd0 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000c1ede35769 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f3efcdb7040 R15: 0000000000000001 INFO: task syz-executor573:19901 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-executor573 D28176 19901 8095 0x80000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] context_switch kernel/sched/core.c:2828 [inline] kernel/sched/core.c:3517 __schedule+0x887/0x2040 kernel/sched/core.c:3517 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] kernel/locking/rwsem-xadd.c:309 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __down_read arch/x86/include/asm/rwsem.h:83 [inline] kernel/locking/rwsem.c:26 down_read+0x44/0x80 kernel/locking/rwsem.c:26 kernel/locking/rwsem.c:26 exit_mm kernel/exit.c:512 [inline] exit_mm kernel/exit.c:512 [inline] kernel/exit.c:857 do_exit+0x6e4/0x2be0 kernel/exit.c:857 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 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] prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] arch/x86/entry/common.c:296 syscall_return_slowpath arch/x86/entry/common.c:271 [inline] arch/x86/entry/common.c:296 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3efcd2abb9 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:00007f3efccdc318 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f3efcdb2408 RCX: 00007f3efcd2abb9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3efcdb2408 RBP: 00007f3efcdb2400 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3efcd80074 R13: 00007fffba70d74f R14: 00007f3efccdc400 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 0000000074041b4b (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7812: #0: 00000000e6c1526f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 fs/file.c:767 1 lock held by syz-executor573/19900: #0: 000000000cce8708 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 arch/x86/mm/fault.c:1348 1 lock held by syz-executor573/19901: #0: 000000000cce8708 (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:512 [inline] #0: 000000000cce8708 (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:512 [inline] kernel/exit.c:857 #0: 000000000cce8708 (&mm->mmap_sem){++++}, at: do_exit+0x6e4/0x2be0 kernel/exit.c:857 kernel/exit.c:857 1 lock held by syz-executor573/19904: 1 lock held by syz-executor573/28073: #0: 00000000ef0aab85 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 arch/x86/mm/fault.c:1348 1 lock held by syz-executor573/28075: #0: 00000000ef0aab85 (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:512 [inline] #0: 00000000ef0aab85 (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:512 [inline] kernel/exit.c:857 #0: 00000000ef0aab85 (&mm->mmap_sem){++++}, at: do_exit+0x6e4/0x2be0 kernel/exit.c:857 kernel/exit.c:857 1 lock held by syz-executor573/28080: 1 lock held by syz-executor573/2759: #0: 000000004dd6bf2c (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 arch/x86/mm/fault.c:1348 2 locks held by syz-executor573/2767: 1 lock held by syz-executor573/2760: #0: 00000000dcc0b088 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 arch/x86/mm/fault.c:1348 2 locks held by syz-executor573/2769: 1 lock held by syz-executor573/2762: #0: 00000000df1d3a24 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 arch/x86/mm/fault.c:1348 2 locks held by syz-executor573/2768: 1 lock held by syz-executor573/2763: #0: 000000007e396a4d (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 arch/x86/mm/fault.c:1348 arch/x86/mm/fault.c:1348 2 locks held by syz-executor573/2770: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1571 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 lib/dump_stack.c:77 [inline] lib/dump_stack.c:118 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 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] trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] kernel/hung_task.c:287 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] kernel/hung_task.c:287 watchdog+0x991/0xe60 kernel/hung_task.c:287 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4684 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:28 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/kasan.c:211 [inline] RIP: 0010:memory_is_poisoned mm/kasan/kasan.c:241 [inline] RIP: 0010:check_memory_region_inline mm/kasan/kasan.c:257 [inline] RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:28 [inline] mm/kasan/kasan.c:267 RIP: 0010:memory_is_poisoned_n mm/kasan/kasan.c:211 [inline] mm/kasan/kasan.c:267 RIP: 0010:memory_is_poisoned mm/kasan/kasan.c:241 [inline] mm/kasan/kasan.c:267 RIP: 0010:check_memory_region_inline mm/kasan/kasan.c:257 [inline] mm/kasan/kasan.c:267 RIP: 0010:check_memory_region+0x31/0x170 mm/kasan/kasan.c:267 mm/kasan/kasan.c:267 Code: 00 00 48 b8 ff ff ff ff ff 7f ff ff 44 0f b6 c2 48 39 c7 0f 86 20 01 00 00 4c 8d 54 37 ff 41 54 48 b8 00 00 00 00 00 fc ff df <4d> 89 d1 55 48 89 fd 49 c1 e9 03 48 c1 ed 03 53 49 01 c1 48 01 c5 RSP: 0018:ffff8880a1787a68 EFLAGS: 00000012 RAX: dffffc0000000000 RBX: ffff8880a1787be0 RCX: ffffffff81299566 RDX: 0000000000000001 RSI: 0000000000000060 RDI: ffff8880a1787b60 RBP: ffff8880a1787b60 R08: 0000000000000001 R09: ffffed10135157c0 R10: ffff8880a1787bbf R11: 0000000000000000 R12: 0000000000000060 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880a1787b60 FS: 00007fc09f6ed8c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc09cac2000 CR3: 00000000a1611000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memset+0x20/0x40 mm/kasan/kasan.c:285 mm/kasan/kasan.c:285 memset include/linux/string.h:362 [inline] memset include/linux/string.h:362 [inline] arch/x86/kernel/unwind_orc.c:595 __unwind_start+0x76/0x960 arch/x86/kernel/unwind_orc.c:595 arch/x86/kernel/unwind_orc.c:595 unwind_start arch/x86/include/asm/unwind.h:60 [inline] unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch/x86/kernel/stacktrace.c:43 __save_stack_trace+0x72/0x190 arch/x86/kernel/stacktrace.c:43 arch/x86/kernel/stacktrace.c:43 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] save_stack mm/kasan/kasan.c:448 [inline] mm/kasan/kasan.c:521 set_track mm/kasan/kasan.c:460 [inline] mm/kasan/kasan.c:521 __kasan_slab_free+0x126/0x1f0 mm/kasan/kasan.c:521 mm/kasan/kasan.c:521 __cache_free mm/slab.c:3503 [inline] __cache_free mm/slab.c:3503 [inline] mm/slab.c:3765 kmem_cache_free+0x7f/0x260 mm/slab.c:3765 mm/slab.c:3765 __put_cred+0x1de/0x250 kernel/cred.c:151 kernel/cred.c:151 put_cred include/linux/cred.h:279 [inline] put_cred include/linux/cred.h:279 [inline] fs/open.c:438 do_faccessat+0x64e/0x7a0 fs/open.c:438 fs/open.c:438 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc09e9a89c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffee1f73028 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffee1f76050 RCX: 00007fc09e9a89c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005615222e89a3 RBP: 00007ffee1f73170 R08: 00005615222de3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000561523bb48a0 R15: 00007ffee1f73660 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax 9: 7f ff ff c: 44 0f b6 c2 movzbl %dl,%r8d 10: 48 39 c7 cmp %rax,%rdi 13: 0f 86 20 01 00 00 jbe 0x139 19: 4c 8d 54 37 ff lea -0x1(%rdi,%rsi,1),%r10 1e: 41 54 push %r12 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 4d 89 d1 mov %r10,%r9 <-- trapping instruction 2d: 55 push %rbp 2e: 48 89 fd mov %rdi,%rbp 31: 49 c1 e9 03 shr $0x3,%r9 35: 48 c1 ed 03 shr $0x3,%rbp 39: 53 push %rbx 3a: 49 01 c1 add %rax,%r9 3d: 48 01 c5 add %rax,%rbp ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax 9: 7f ff ff c: 44 0f b6 c2 movzbl %dl,%r8d 10: 48 39 c7 cmp %rax,%rdi 13: 0f 86 20 01 00 00 jbe 0x139 19: 4c 8d 54 37 ff lea -0x1(%rdi,%rsi,1),%r10 1e: 41 54 push %r12 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 4d 89 d1 mov %r10,%r9 <-- trapping instruction 2d: 55 push %rbp 2e: 48 89 fd mov %rdi,%rbp 31: 49 c1 e9 03 shr $0x3,%r9 35: 48 c1 ed 03 shr $0x3,%rbp 39: 53 push %rbx 3a: 49 01 c1 add %rax,%r9 3d: 48 01 c5 add %rax,%rbp