INFO: task syz-executor.4:25265 blocked for more than 143 seconds.
Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:25808 pid:25265 tgid:25263 ppid:23409 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
link_path_walk.part.0.constprop.0+0x77f/0xcd0 fs/namei.c:2331
link_path_walk fs/namei.c:2256 [inline]
path_openat+0x22f/0x2990 fs/namei.c:3795
do_filp_open+0x1dc/0x430 fs/namei.c:3826
do_sys_openat2+0x17a/0x1e0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1432
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f642807dea9
RSP: 002b:00007f6428d650c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f64281abf80 RCX: 00007f642807dea9
RDX: 0000000000000042 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f64280ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f64281abf80 R15: 00007ffdeb026788
INFO: task syz-executor.4:25272 blocked for more than 144 seconds.
Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29360 pid:25272 tgid:25263 ppid:23409 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
do_fchmodat fs/open.c:696 [inline]
__do_sys_fchmodat fs/open.c:717 [inline]
__se_sys_fchmodat fs/open.c:714 [inline]
__x64_sys_fchmodat+0x10d/0x1f0 fs/open.c:714
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f642807dea9
RSP: 002b:00007f6428d230c8 EFLAGS: 00000246 ORIG_RAX: 000000000000010c
RAX: ffffffffffffffda RBX: 00007f64281ac120 RCX: 00007f642807dea9
RDX: 00000000000001ff RSI: 0000000020000440 RDI: ffffffffffffff9c
RBP: 00007f64280ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f64281ac120 R15: 00007ffdeb026788
INFO: task syz-executor.4:25273 blocked for more than 145 seconds.
Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28720 pid:25273 tgid:25263 ppid:23409 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
open_last_lookups fs/namei.c:3565 [inline]
path_openat+0x18ce/0x2990 fs/namei.c:3796
do_filp_open+0x1dc/0x430 fs/namei.c:3826
do_open_execat+0xfa/0x3f0 fs/exec.c:930
alloc_bprm+0x2b/0xc50 fs/exec.c:1541
do_execveat_common.isra.0+0x1cd/0x750 fs/exec.c:1930
do_execveat fs/exec.c:2064 [inline]
__do_sys_execveat fs/exec.c:2138 [inline]
__se_sys_execveat fs/exec.c:2132 [inline]
__x64_sys_execveat+0xda/0x120 fs/exec.c:2132
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f642807dea9
RSP: 002b:00007f6428d020c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000142
RAX: ffffffffffffffda RBX: 00007f64281ac1f0 RCX: 00007f642807dea9
RDX: 00000000200003c0 RSI: 0000000020000380 RDI: ffffffffffffff9c
RBP: 00007f64280ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000400 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f64281ac1f0 R15: 00007ffdeb026788
INFO: task syz-executor.4:25276 blocked for more than 146 seconds.
Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29024 pid:25276 tgid:25263 ppid:23409 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
open_last_lookups fs/namei.c:3565 [inline]
path_openat+0x18ce/0x2990 fs/namei.c:3796
do_filp_open+0x1dc/0x430 fs/namei.c:3826
do_open_execat+0xfa/0x3f0 fs/exec.c:930
alloc_bprm+0x2b/0xc50 fs/exec.c:1541
do_execveat_common.isra.0+0x1cd/0x750 fs/exec.c:1930
do_execveat fs/exec.c:2064 [inline]
__do_sys_execveat fs/exec.c:2138 [inline]
__se_sys_execveat fs/exec.c:2132 [inline]
__x64_sys_execveat+0xda/0x120 fs/exec.c:2132
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f642807dea9
RSP: 002b:00007f6427bff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000142
RAX: ffffffffffffffda RBX: 00007f64281ac2c0 RCX: 00007f642807dea9
RDX: 00000000200004c0 RSI: 0000000020000480 RDI: ffffffffffffff9c
RBP: 00007f64280ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000500 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f64281ac2c0 R15: 00007ffdeb026788
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4828:
#0: ffff88802ae350a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
2 locks held by kworker/u8:12/9039:
no locks held by syz-executor.2/11205.
1 lock held by syz-executor.4/25265:
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
2 locks held by syz-executor.4/25268:
1 lock held by syz-executor.4/25272:
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.4/25273:
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3565 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: path_openat+0x18ce/0x2990 fs/namei.c:3796
1 lock held by syz-executor.4/25276:
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: open_last_lookups fs/namei.c:3565 [inline]
#0: ffff88805b73c188 (&type->i_mutex_dir_key#29){.+.+}-{3:3}, at: path_openat+0x18ce/0x2990 fs/namei.c:3796
1 lock held by syz-executor.1/25972:
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x7a0 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.2/26916:
1 lock held by syz-executor.3/26920:
#0: ffff888057522610 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
#0: ffff888057522610 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x270 net/socket.c:658
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 26921 Comm: syz-executor.4 Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:copy_from_user include/linux/uaccess.h:183 [inline]
RIP: 0010:restore_altstack+0x78/0x170 kernel/signal.c:4320
Code: f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 44 24 78 31 c0 e8 89 13 38 00 48 89 ee ba 18 00 00 00 48 c7 44 24 20 00 00 00 00 <48> 8d 7c 24 20 48 c7 44 24 28 00 00 00 00 48 c7 44 24 30 00 00 00
RSP: 0018:ffffc900037bfdf0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff920006f7fbe RCX: ffffffff812fe3fa
RDX: 0000000000000018 RSI: 00007ffd19260810 RDI: 00007ffd19260810
RBP: 00007ffd19260810 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc900037bff58 R14: 0000000000000000 R15: 0000000000000000
FS: 000055557a30c480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f51979198 CR3: 000000006682a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__do_sys_rt_sigreturn+0x1cd/0x230 arch/x86/kernel/signal_64.c:269
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0705c7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd19260d98 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00007f0705c7dea9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f0705dabf88
RBP: 00007f0705dabf80 R08: 0000000000000000 R09: 00007ffd19260dc0
R10: 00007f0705dabf80 R11: 0000000000000246 R12: 00007ffd19260f50
R13: 0000000000000000 R14: ffffffffffffffff R15: 00007f0705c34cb0