ci starts bisection 2022-08-22 22:16:36.743261231 +0000 UTC m=+281703.379295649
bisecting fixing commit since 7fd2bf83d59a2d32e0d596c5d3e623b9a0e7e2d5
building syzkaller on 838e7e2cd9228583ca33c49a39aea4d863d3e36d
testing commit 7fd2bf83d59a2d32e0d596c5d3e623b9a0e7e2d5
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 01b893fbad8e791d37845f483396b9f7db77ffec1671a35635c59f9e3974f70b
all runs: crashed: INFO: task hung in fuse_simple_request
testing current HEAD 072e51356cd5a4a1c12c1020bc054c99b98333df
testing commit 072e51356cd5a4a1c12c1020bc054c99b98333df
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: af568e51b6a9ac1d9449a40a5317db2683628980ad728ac92d13a6323f582ab2
all runs: crashed: INFO: task hung in fuse_simple_request
revisions tested: 2, total time: 38m48.836276203s (build: 14m48.789350277s, test: 23m4.480543352s)
the crash still happens on HEAD
commit msg: Merge tag 'nfs-for-5.20-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
crash: INFO: task hung in fuse_simple_request
INFO: task syz-executor.3:4164 blocked for more than 143 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27264 pid: 4164 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.3:4169 blocked for more than 143 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27704 pid: 4169 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.3:4174 blocked for more than 143 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27176 pid: 4174 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.3:4179 blocked for more than 144 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27360 pid: 4179 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.3:4184 blocked for more than 144 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27376 pid: 4184 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.3:4189 blocked for more than 144 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27800 pid: 4189 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.3:4195 blocked for more than 144 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27840 pid: 4195 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.3:4201 blocked for more than 145 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27416 pid: 4201 ppid: 4125 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f49e14878d9
RSP: 002b:00007f49e2608188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f49e158bf60 RCX: 00007f49e14878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f49e14e1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49e1abfb2f R14: 00007f49e2608300 R15: 0000000000022000
INFO: task syz-executor.0:4207 blocked for more than 145 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27640 pid: 4207 ppid: 4130 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd0c1c878d9
RSP: 002b:00007fd0c2d8e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007fd0c1d8bf60 RCX: 00007fd0c1c878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007fd0c1ce1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd0c22bfb2f R14: 00007fd0c2d8e300 R15: 0000000000022000
INFO: task syz-executor.5:4212 blocked for more than 145 seconds.
Not tainted 6.0.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27640 pid: 4212 ppid: 4128 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x916/0x27c0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x53a/0xc00 fs/fuse/dev.c:511
fuse_access+0x1bc/0x320 fs/fuse/dir.c:1275
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x2ca/0x470 fs/namei.c:525
path_permission include/linux/fs.h:2902 [inline]
__do_sys_chdir fs/open.c:518 [inline]
__se_sys_chdir fs/open.c:508 [inline]
__x64_sys_chdir+0xf6/0x1f0 fs/open.c:508
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1f8fa878d9
RSP: 002b:00007f1f90b5a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f1f8fb8bf60 RCX: 00007f1f8fa878d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 00007f1f8fae1cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f900bfb2f R14: 00007f1f90b5a300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8b17ca30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8b17c730 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8b17d580 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
2 locks held by getty/3315:
#0: ffff888024ab2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900029232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb6e/0x1030 drivers/tty/n_tty.c:2177
2 locks held by kworker/0:3/3660:
#0: ffff888010066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888010066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888010066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888010066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888010066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x13d0 kernel/workqueue.c:2260
#1: ffffc9000350fdb8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x13d0 kernel/workqueue.c:2264
5 locks held by kworker/u4:10/15355:
1 lock held by syz-executor134/24179:
#0: ffffffff8b188238 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8b188238 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x562/0x670 kernel/rcu/tree_exp.h:940
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xca lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x154/0x180 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:369
kthread+0x294/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 24357 Comm: kworker/u4:15 Not tainted 6.0.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__this_cpu_preempt_check+0x0/0x10 lib/smp_processor_id.c:65
Code: cc cd ff eb a4 0f 1f 44 00 00 48 c7 c6 a0 48 64 89 48 c7 c7 e0 48 64 89 e9 0d ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <48> 89 fe 48 c7 c7 20 49 64 89 e9 f1 fe ff ff cc eb 1e 0f 1f 00 48
RSP: 0018:ffffc900047afbb8 EFLAGS: 00000046
RAX: 0000000000000002 RBX: 658fc1b110d12353 RCX: ffffc900047afc10
RDX: 1ffff1100f32a4e5 RSI: 0000000000000000 RDI: ffffffff890bd2c0
RBP: 1ffff920008f5f7a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000003 R14: ffff888079952730 R15: ffff888079951d00
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555eb8728 CR3: 000000000ae8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:466 [inline]
lock_release+0x3bb/0x780 kernel/locking/lockdep.c:5688
rcu_lock_release include/linux/rcupdate.h:285 [inline]
rcu_read_unlock include/linux/rcupdate.h:739 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x668/0xd70 net/batman-adv/network-coding.c:719
process_one_work+0x865/0x13d0 kernel/workqueue.c:2289
worker_thread+0x598/0xec0 kernel/workqueue.c:2436
kthread+0x294/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306