INFO: task syz-executor964:8247 blocked for more than 140 seconds. Not tainted 4.19.207-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor964 D28184 8247 8132 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 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_access+0x21b/0x2f0 fs/fuse/dir.c:1092 fuse_permission+0x33c/0x5a0 fs/fuse/dir.c:1164 do_inode_permission fs/namei.c:386 [inline] inode_permission.part.0+0x276/0x450 fs/namei.c:451 inode_permission+0x35/0x140 fs/namei.c:406 ksys_chdir+0xc9/0x1d0 fs/open.c:462 __do_sys_chdir fs/open.c:480 [inline] __se_sys_chdir fs/open.c:478 [inline] __x64_sys_chdir+0x2d/0x40 fs/open.c:478 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f82cc34ce39 Code: Bad RIP value. RSP: 002b:00007f82cc2fd208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f82cc3d74c8 RCX: 00007f82cc34ce39 RDX: 00007f82cc34ce39 RSI: 5064a7e0d1041c60 RDI: 00000000200020c0 RBP: 00007f82cc3d74c0 R08: 0000000000000000 R09: 00007f82cc3d74c8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f82cc3d74cc R13: 00007fffa5d2aa0f R14: 00007f82cc2fd300 R15: 0000000000022000 INFO: task syz-executor964:8276 blocked for more than 140 seconds. Not tainted 4.19.207-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor964 D27840 8276 8132 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 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_access+0x21b/0x2f0 fs/fuse/dir.c:1092 fuse_permission+0x33c/0x5a0 fs/fuse/dir.c:1164 do_inode_permission fs/namei.c:386 [inline] inode_permission.part.0+0x276/0x450 fs/namei.c:451 inode_permission+0x35/0x140 fs/namei.c:406 ksys_chdir+0xc9/0x1d0 fs/open.c:462 __do_sys_chdir fs/open.c:480 [inline] __se_sys_chdir fs/open.c:478 [inline] __x64_sys_chdir+0x2d/0x40 fs/open.c:478 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f82cc34ce39 Code: Bad RIP value. RSP: 002b:00007f82cc2fd208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f82cc3d74c8 RCX: 00007f82cc34ce39 RDX: 00007f82cc34ce39 RSI: 5064a7e0d1041c60 RDI: 00000000200020c0 RBP: 00007f82cc3d74c0 R08: 0000000000000000 R09: 00007f82cc3d74c8 R10: 00007f82cc3d74c8 R11: 0000000000000246 R12: 00007f82cc3d74cc R13: 00007fffa5d2aa0f R14: 00007f82cc2fd300 R15: 0000000000022000 INFO: task syz-executor964:8352 blocked for more than 140 seconds. Not tainted 4.19.207-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor964 D27800 8352 8132 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 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_access+0x21b/0x2f0 fs/fuse/dir.c:1092 fuse_permission+0x33c/0x5a0 fs/fuse/dir.c:1164 do_inode_permission fs/namei.c:386 [inline] inode_permission.part.0+0x276/0x450 fs/namei.c:451 inode_permission+0x35/0x140 fs/namei.c:406 ksys_chdir+0xc9/0x1d0 fs/open.c:462 __do_sys_chdir fs/open.c:480 [inline] __se_sys_chdir fs/open.c:478 [inline] __x64_sys_chdir+0x2d/0x40 fs/open.c:478 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f82cc34ce39 Code: Bad RIP value. RSP: 002b:00007f82cc2fd208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f82cc3d74c8 RCX: 00007f82cc34ce39 RDX: 00007f82cc34ce39 RSI: 5064a7e0d1041c60 RDI: 00000000200020c0 RBP: 00007f82cc3d74c0 R08: 0000000000000000 R09: 00007f82cc3d74c8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f82cc3d74cc R13: 00007fffa5d2aa0f R14: 00007f82cc2fd300 R15: 0000000000022000 INFO: task syz-executor964:8500 blocked for more than 140 seconds. Not tainted 4.19.207-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor964 D27592 8500 8132 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 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_access+0x21b/0x2f0 fs/fuse/dir.c:1092 fuse_permission+0x33c/0x5a0 fs/fuse/dir.c:1164 do_inode_permission fs/namei.c:386 [inline] inode_permission.part.0+0x276/0x450 fs/namei.c:451 inode_permission+0x35/0x140 fs/namei.c:406 ksys_chdir+0xc9/0x1d0 fs/open.c:462 __do_sys_chdir fs/open.c:480 [inline] __se_sys_chdir fs/open.c:478 [inline] __x64_sys_chdir+0x2d/0x40 fs/open.c:478 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f82cc34ce39 Code: Bad RIP value. RSP: 002b:00007f82cc2fd208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f82cc3d74c8 RCX: 00007f82cc34ce39 RDX: 00007f82cc34ce39 RSI: 5064a7e0d1041c60 RDI: 00000000200020c0 RBP: 00007f82cc3d74c0 R08: 0000000000000000 R09: 00007f82cc3d74c8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f82cc3d74cc R13: 00007fffa5d2aa0f R14: 00007f82cc2fd300 R15: 0000000000022000 INFO: task syz-executor964:8633 blocked for more than 140 seconds. Not tainted 4.19.207-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor964 D27944 8633 8132 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 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_access+0x21b/0x2f0 fs/fuse/dir.c:1092 fuse_permission+0x33c/0x5a0 fs/fuse/dir.c:1164 do_inode_permission fs/namei.c:386 [inline] inode_permission.part.0+0x276/0x450 fs/namei.c:451 inode_permission+0x35/0x140 fs/namei.c:406 ksys_chdir+0xc9/0x1d0 fs/open.c:462 __do_sys_chdir fs/open.c:480 [inline] __se_sys_chdir fs/open.c:478 [inline] __x64_sys_chdir+0x2d/0x40 fs/open.c:478 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f82cc34ce39 Code: Bad RIP value. RSP: 002b:00007f82cc2fd208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00007f82cc3d74c8 RCX: 00007f82cc34ce39 RDX: 00007f82cc34ce39 RSI: 5064a7e0d1041c60 RDI: 00000000200020c0 RBP: 00007f82cc3d74c0 R08: 0000000000000000 R09: 00007f82cc3d74c8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f82cc3d74cc R13: 00007fffa5d2aa0f R14: 00007f82cc2fd300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000891295d9 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.207-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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4691 Comm: systemd-journal Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rol32 include/linux/bitops.h:83 [inline] RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:314 [inline] RIP: 0010:__lock_acquire+0x860/0x3ff0 kernel/locking/lockdep.c:3411 Code: da 89 d9 48 c1 ea 20 89 d0 41 29 d0 01 da c1 c0 04 44 31 c0 44 8d 04 10 29 c1 c1 c0 06 48 8b 3c 24 31 c8 89 c1 29 c2 44 01 c0 c1 08 31 ca 89 d1 41 29 d0 01 c2 c1 c1 10 89 d6 41 31 c8 44 89 RSP: 0018:ffff8880a13ffb58 EFLAGS: 00000096 RAX: 00000000ffffdb00 RBX: 0000000000000000 RCX: 00000000ffffda6c RDX: 0000000000002594 RSI: ffff8880a13f6dc8 RDI: 0000000000000000 RBP: ffff8880a13f6dea R08: 0000000000000094 R09: 0000000000000000 R10: ffff8880a13f6dc8 R11: 0000000000000000 R12: 0000000000040094 R13: ffff8880a13f6540 R14: ffff8880a13f6de0 R15: 0000000000000001 FS: 00007f3323e0b8c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f33211e8000 CR3: 00000000a0c14000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __fs_reclaim_acquire mm/page_alloc.c:3759 [inline] fs_reclaim_acquire+0x105/0x130 mm/page_alloc.c:3770 slab_pre_alloc_hook mm/slab.h:419 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x21/0x370 mm/slab.c:3557 getname_flags+0xce/0x590 fs/namei.c:140 user_path_at_empty+0x2a/0x50 fs/namei.c:2609 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x248/0x7a0 fs/open.c:397 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f33230c69c7 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:00007ffe8bf710c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffe8bf73fe0 RCX: 00007f33230c69c7 RDX: 00007f3323b37a00 RSI: 0000000000000000 RDI: 0000557e6773f9a3 RBP: 00007ffe8bf71100 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffe8bf73fe0 R15: 00007ffe8bf715f0 ---------------- Code disassembly (best guess): 0: da 89 d9 48 c1 ea fimull -0x153eb727(%rcx) 6: 20 89 d0 41 29 d0 and %cl,-0x2fd6be30(%rcx) c: 01 da add %ebx,%edx e: c1 c0 04 rol $0x4,%eax 11: 44 31 c0 xor %r8d,%eax 14: 44 8d 04 10 lea (%rax,%rdx,1),%r8d 18: 29 c1 sub %eax,%ecx 1a: c1 c0 06 rol $0x6,%eax 1d: 48 8b 3c 24 mov (%rsp),%rdi 21: 31 c8 xor %ecx,%eax 23: 89 c1 mov %eax,%ecx 25: 29 c2 sub %eax,%edx 27: 44 01 c0 add %r8d,%eax * 2a: c1 c1 08 rol $0x8,%ecx <-- trapping instruction 2d: 31 ca xor %ecx,%edx 2f: 89 d1 mov %edx,%ecx 31: 41 29 d0 sub %edx,%r8d 34: 01 c2 add %eax,%edx 36: c1 c1 10 rol $0x10,%ecx 39: 89 d6 mov %edx,%esi 3b: 41 31 c8 xor %ecx,%r8d 3e: 44 rex.R 3f: 89 .byte 0x89