Hi, Syzkaller found the following issue: HEAD commit: 75acfdb Linux 5.16-rc8 git tree: upstream console output: https://pastebin.com/raw/7TSe1kGF kernel config: https://pastebin.com/raw/XsnKfdRt And hope the report log can help you. INFO: task systemd-udevd:27429 blocked for more than 146 seconds. Not tainted 5.16.0-rc8+ #10 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26528 pid:27429 ppid: 3127 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xcd9/0x2550 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 rwsem_down_write_slowpath+0x664/0x1190 kernel/locking/rwsem.c:1151 __down_write_common kernel/locking/rwsem.c:1268 [inline] __down_write_common kernel/locking/rwsem.c:1265 [inline] __down_write kernel/locking/rwsem.c:1277 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1524 inode_lock include/linux/fs.h:783 [inline] open_last_lookups fs/namei.c:3347 [inline] path_openat+0xa66/0x26c0 fs/namei.c:3556 do_filp_open+0x1c1/0x290 fs/namei.c:3586 do_sys_openat2+0x61b/0x9a0 fs/open.c:1212 do_sys_open+0xc3/0x140 fs/open.c:1228 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fde8feb06f0 RSP: 002b:00007ffdc8b61368 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fde8feb06f0 RDX: 0000000000000180 RSI: 00000000000800c2 RDI: 00005624b8ca9880 RBP: 000000000003a2f8 R08: 000000000000fefe R09: 00007fde8ff03740 R10: 0000000000000000 R11: 0000000000000246 R12: 00005624b8ca9895 R13: 8421084210842109 R14: 00000000000800c2 R15: 00007fde8ff3e540 </TASK> INFO: task systemd-udevd:27467 blocked for more than 148 seconds. Not tainted 5.16.0-rc8+ #10 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:27072 pid:27467 ppid: 3127 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xcd9/0x2550 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 rwsem_down_write_slowpath+0x664/0x1190 kernel/locking/rwsem.c:1151 __down_write_common kernel/locking/rwsem.c:1268 [inline] __down_write_common kernel/locking/rwsem.c:1265 [inline] __down_write kernel/locking/rwsem.c:1277 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1524 inode_lock include/linux/fs.h:783 [inline] open_last_lookups fs/namei.c:3347 [inline] path_openat+0xa66/0x26c0 fs/namei.c:3556 do_filp_open+0x1c1/0x290 fs/namei.c:3586 do_sys_openat2+0x61b/0x9a0 fs/open.c:1212 do_sys_open+0xc3/0x140 fs/open.c:1228 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fde8feb06f0 RSP: 002b:00007ffdc8b60d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fde8feb06f0 RDX: 0000000000000180 RSI: 00000000000800c2 RDI: 00005624b8c989c0 RBP: 000000000003a2f8 R08: 000000000000fcfe R09: 00007fde8ff03740 R10: 0000000000000000 R11: 0000000000000246 R12: 00005624b8c989d6 R13: 8421084210842109 R14: 00000000000800c2 R15: 00007fde8ff3e540 </TASK> INFO: task systemd-udevd:27515 blocked for more than 150 seconds. Not tainted 5.16.0-rc8+ #10 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:27584 pid:27515 ppid: 3127 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xcd9/0x2550 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 rwsem_down_write_slowpath+0x664/0x1190 kernel/locking/rwsem.c:1151 __down_write_common kernel/locking/rwsem.c:1268 [inline] __down_write_common kernel/locking/rwsem.c:1265 [inline] __down_write kernel/locking/rwsem.c:1277 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1524 inode_lock include/linux/fs.h:783 [inline] open_last_lookups fs/namei.c:3347 [inline] path_openat+0xa66/0x26c0 fs/namei.c:3556 do_filp_open+0x1c1/0x290 fs/namei.c:3586 do_sys_openat2+0x61b/0x9a0 fs/open.c:1212 do_sys_open+0xc3/0x140 fs/open.c:1228 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fde8feb06f0 RSP: 002b:00007ffdc8b60d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fde8feb06f0 RDX: 0000000000000180 RSI: 00000000000800c2 RDI: 00005624b8cad110 RBP: 000000000003a2f8 R08: 000000000000fefe R09: 00007fde8ff03740 R10: 0000000000000000 R11: 0000000000000246 R12: 00005624b8cad126 R13: 8421084210842109 R14: 00000000000800c2 R15: 00007fde8ff3e540 </TASK> INFO: task systemd-udevd:27530 blocked for more than 153 seconds. Not tainted 5.16.0-rc8+ #10 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26048 pid:27530 ppid: 3127 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xcd9/0x2550 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 rwsem_down_write_slowpath+0x664/0x1190 kernel/locking/rwsem.c:1151 __down_write_common kernel/locking/rwsem.c:1268 [inline] __down_write_common kernel/locking/rwsem.c:1265 [inline] __down_write kernel/locking/rwsem.c:1277 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1524 inode_lock include/linux/fs.h:783 [inline] open_last_lookups fs/namei.c:3347 [inline] path_openat+0xa66/0x26c0 fs/namei.c:3556 do_filp_open+0x1c1/0x290 fs/namei.c:3586 do_sys_openat2+0x61b/0x9a0 fs/open.c:1212 do_sys_open+0xc3/0x140 fs/open.c:1228 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fde8feb06f0 RSP: 002b:00007ffdc8b61368 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fde8feb06f0 RDX: 0000000000000180 RSI: 00000000000800c2 RDI: 00005624b8ca9880 RBP: 000000000003a2f8 R08: 000000000000fefe R09: 00007fde8ff03740 R10: 0000000000000000 R11: 0000000000000246 R12: 00005624b8ca9896 R13: 8421084210842109 R14: 00000000000800c2 R15: 00007fde8ff3e540 </TASK>
