INFO: task syz-executor.0:29115 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28136 pid:29115 ppid: 3660 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
exit_mm kernel/exit.c:483 [inline]
do_exit+0xa0a/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
__do_sys_exit_group kernel/exit.c:940 [inline]
__se_sys_exit_group kernel/exit.c:938 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:938
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: 0033:0x7fe7da4d4eb9
RSP: 002b:00007fe7dab1bd58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007fe7da4d4eb9
RDX: 00007fe7da487afb RSI: ffffffffffffffbc RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007ffcd0b67080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007fe7dab1be40
INFO: task syz-executor.0:29118 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28168 pid:29118 ppid: 3660 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
exit_mm kernel/exit.c:483 [inline]
do_exit+0xa0a/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe7da4d4eb9
RSP: 002b:00007fe7d8e4a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe7da5e7f68 RCX: 00007fe7da4d4eb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe7da5e7f68
RBP: 00007fe7da5e7f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe7da5e7f6c
R13: 00007fe7dab1bb1f R14: 00007fe7d8e4a300 R15: 0000000000022000
INFO: task syz-executor.0:29119 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29456 pid:29119 ppid: 3660 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
exit_mm kernel/exit.c:483 [inline]
do_exit+0xa0a/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe7da4d4eb9
RSP: 002b:00007fe7d8e29218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe7da5e8038 RCX: 00007fe7da4d4eb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe7da5e8038
RBP: 00007fe7da5e8030 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe7da5e803c
R13: 00007fe7dab1bb1f R14: 00007fe7d8e29300 R15: 0000000000022000
INFO: task syz-executor.0:29122 blocked for more than 144 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29456 pid:29122 ppid: 3660 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
exit_mm kernel/exit.c:483 [inline]
do_exit+0xa0a/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe7da4d4eb9
RSP: 002b:00007fe7d8de7218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe7da5e81d8 RCX: 00007fe7da4d4eb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe7da5e81d8
RBP: 00007fe7da5e81d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe7da5e81dc
R13: 00007fe7dab1bb1f R14: 00007fe7d8de7300 R15: 0000000000022000
INFO: task syz-executor.0:29123 blocked for more than 144 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28952 pid:29123 ppid: 3660 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
exit_mm kernel/exit.c:483 [inline]
do_exit+0xa0a/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe7da4d4eb9
RSP: 002b:00007fe7d8dc6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe7da5e82a8 RCX: 00007fe7da4d4eb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe7da5e82a8
RBP: 00007fe7da5e82a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe7da5e82ac
R13: 00007fe7dab1bb1f R14: 00007fe7d8dc6300 R15: 0000000000022000
INFO: task syz-executor.0:29124 blocked for more than 144 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29928 pid:29124 ppid: 3660 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0x9d6/0x11c0 arch/x86/mm/fault.c:1348
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:copy_user_generic_unrolled+0x86/0xc0 arch/x86/lib/copy_user_64.S:91
Code: 4c 8b 5e 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 <4c> 8b 06 4c 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10
RSP: 0018:ffffc9000fdffe70 EFLAGS: 00050202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffc9000fdffec8
RBP: ffffc9000fdffec8 R08: 0000000000000001 R09: ffffc9000fdffecf
R10: fffff52001fbffd9 R11: 0000000000000000 R12: 0000000020000008
R13: 0000000020000000 R14: 0000000000000000 R15: 0000000020000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
_copy_from_user+0xf4/0x180 lib/usercopy.c:16
copy_from_user include/linux/uaccess.h:192 [inline]
__do_sys_signalfd4 fs/signalfd.c:308 [inline]
__se_sys_signalfd4 fs/signalfd.c:301 [inline]
__x64_sys_signalfd4+0x113/0x1c0 fs/signalfd.c:301
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: 0033:0x7fe7da4d4eb9
RSP: 002b:00007fe7d8da5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000121
RAX: ffffffffffffffda RBX: 00007fe7da5e8370 RCX: 00007fe7da4d4eb9
RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007fe7da52f08d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7dab1bb1f R14: 00007fe7d8da5300 R15: 0000000000022000
INFO: task syz-executor.0:29125 blocked for more than 145 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:30328 pid:29125 ppid: 3660 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0x9d6/0x11c0 arch/x86/mm/fault.c:1348
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x7fe7da47bdd4
RSP: 002b:00007fe7d8d84190 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fe7da53301f
RDX: 0000000000253468 RSI: 0000000020000040 RDI: 00007fe7da52dfad
RBP: 00007fe7da52f08d R08: 0000000000000a06 R09: 00007ffcd0b67080
R10: 00007ffcd0b67090 R11: 000000000007bd70 R12: 0000000000000000
R13: 00007fe7dab1bb1f R14: 00007fe7d8d84300 R15: 0000000000022000
INFO: task syz-executor.0:29126 blocked for more than 145 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:30328 pid:29126 ppid: 3660 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4f00 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1032
__down_read_common kernel/locking/rwsem.c:1214 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1463
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0x9d6/0x11c0 arch/x86/mm/fault.c:1348
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x7fe7da47bdd4
RSP: 002b:00007fe7d8d63190 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fe7da5274c0
RDX: 0000000000253468 RSI: 0000000000000004 RDI: 00007fe7da52dfad
RBP: 00007fe7da52f08d R08: 0000000000000a06 R09: 00007ffcd0b67080
R10: 00007ffcd0b67090 R11: 000000000007bd70 R12: 0000000000000000
R13: 00007fe7dab1bb1f R14: 00007fe7d8d63300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb851e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3295:
#0: ffff888023477098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
2 locks held by kworker/u4:5/21397:
1 lock held by syz-executor.0/29115:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm kernel/exit.c:483 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_exit+0xa0a/0x2b40 kernel/exit.c:819
1 lock held by syz-executor.0/29118:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm kernel/exit.c:483 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_exit+0xa0a/0x2b40 kernel/exit.c:819
1 lock held by syz-executor.0/29119:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm kernel/exit.c:483 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_exit+0xa0a/0x2b40 kernel/exit.c:819
2 locks held by syz-executor.0/29120:
1 lock held by syz-executor.0/29122:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm kernel/exit.c:483 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_exit+0xa0a/0x2b40 kernel/exit.c:819
1 lock held by syz-executor.0/29123:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm kernel/exit.c:483 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_exit+0xa0a/0x2b40 kernel/exit.c:819
1 lock held by syz-executor.0/29124:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x9d6/0x11c0 arch/x86/mm/fault.c:1348
1 lock held by syz-executor.0/29125:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x9d6/0x11c0 arch/x86/mm/fault.c:1348
1 lock held by syz-executor.0/29126:
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff8880262c6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x9d6/0x11c0 arch/x86/mm/fault.c:1348
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 140 Comm: kworker/1:2 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:__lock_acquire+0xff1/0x5470 kernel/locking/lockdep.c:4997
Code: 44 8b 3d 1a 6d 37 0c 45 85 ff 0f 85 4c fe ff ff 48 c7 c6 40 3e ac 89 48 c7 c7 00 10 ac 89 e8 b3 94 aa 07 0f 0b e9 35 fe ff ff <48> 63 5c 24 18 be 08 00 00 00 48 8d 43 3f 48 85 db 48 0f 49 c3 48
RSP: 0018:ffffc9000282f8f0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8880184ac444 RCX: 1ffffffff1ff8436
RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffffffff8ffc21b0
RBP: ffff8880184ac522 R08: 0000000000000000 R09: ffffffff8ffb9a17
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880184ac500
R13: ffff8880184aba00 R14: ffff8880184ac460 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d9ff6ab6f8 CR3: 0000000078fa6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5639 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
_extract_crng+0xcd/0x1c0 drivers/char/random.c:1035
extract_crng drivers/char/random.c:1044 [inline]
_get_random_bytes+0x219/0x690 drivers/char/random.c:1551
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:773 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x73c/0xbc0 drivers/net/netdevsim/dev.c:843
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 4c 8b 5e 38 mov 0x38(%rsi),%r11
4: 4c 89 47 20 mov %r8,0x20(%rdi)
8: 4c 89 4f 28 mov %r9,0x28(%rdi)
c: 4c 89 57 30 mov %r10,0x30(%rdi)
10: 4c 89 5f 38 mov %r11,0x38(%rdi)
14: 48 8d 76 40 lea 0x40(%rsi),%rsi
18: 48 8d 7f 40 lea 0x40(%rdi),%rdi
1c: ff c9 dec %ecx
1e: 75 b6 jne 0xffffffd6
20: 89 d1 mov %edx,%ecx
22: 83 e2 07 and $0x7,%edx
25: c1 e9 03 shr $0x3,%ecx
28: 74 12 je 0x3c
* 2a: 4c 8b 06 mov (%rsi),%r8 <-- trapping instruction
2d: 4c 89 07 mov %r8,(%rdi)
30: 48 8d 76 08 lea 0x8(%rsi),%rsi
34: 48 8d 7f 08 lea 0x8(%rdi),%rdi
38: ff c9 dec %ecx
3a: 75 ee jne 0x2a
3c: 21 d2 and %edx,%edx
3e: 74 10 je 0x50