INFO: task syz.6.911:9314 blocked for more than 143 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.911 state:D stack:27856 pid:9314 ppid:5081 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
rwsem_down_write_slowpath+0xea1/0x14b0 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
open_last_lookups fs/namei.c:3547 [inline]
path_openat+0x7b6/0x2e60 fs/namei.c:3780
do_filp_open+0x230/0x480 fs/namei.c:3810
do_sys_openat2+0x13b/0x4f0 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_open fs/open.c:1342 [inline]
__se_sys_open fs/open.c:1338 [inline]
__x64_sys_open+0x221/0x270 fs/open.c:1338
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6dc418e169
RSP: 002b:00007f6dc5032038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f6dc43b6160 RCX: 00007f6dc418e169
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000200000000180
RBP: 00007f6dc4210a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6dc43b6160 R15: 00007ffcbcda2aa8
INFO: task syz.6.911:9316 blocked for more than 144 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.911 state:D stack:28616 pid:9316 ppid:5081 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:768 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1706
walk_component fs/namei.c:1998 [inline]
link_path_walk+0x9d6/0xee0 fs/namei.c:2325
path_parentat fs/namei.c:2526 [inline]
__filename_parentat+0x25e/0x6e0 fs/namei.c:2550
filename_parentat fs/namei.c:2568 [inline]
filename_create+0xf2/0x530 fs/namei.c:3857
do_mkdirat+0xba/0x360 fs/namei.c:4121
__do_sys_mkdirat fs/namei.c:4146 [inline]
__se_sys_mkdirat fs/namei.c:4144 [inline]
__x64_sys_mkdirat+0x85/0x90 fs/namei.c:4144
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6dc418e169
RSP: 002b:00007f6dc5011038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f6dc43b6240 RCX: 00007f6dc418e169
RDX: 00000000000001ff RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007f6dc4210a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6dc43b6240 R15: 00007ffcbcda2aa8
INFO: task syz.6.911:9317 blocked for more than 144 seconds.
Not tainted 6.1.134-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.911 state:D stack:27832 pid:9317 ppid:5081 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:768 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1706
walk_component fs/namei.c:1998 [inline]
link_path_walk+0x9d6/0xee0 fs/namei.c:2325
path_lookupat+0xa9/0x450 fs/namei.c:2478
do_o_path+0x91/0x230 fs/namei.c:3754
path_openat+0x2884/0x2e60 fs/namei.c:3776
do_filp_open+0x230/0x480 fs/namei.c:3810
do_sys_openat2+0x13b/0x4f0 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1345
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6dc418e169
RSP: 002b:00007f6dc4ff0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f6dc43b6320 RCX: 00007f6dc418e169
RDX: 0000000000200002 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007f6dc4210a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6dc43b6320 R15: 00007ffcbcda2aa8
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32e910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32f110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32e740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6510
2 locks held by getty/4003:
#0: ffff88814cd64098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000325e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x54a/0x1620 drivers/tty/n_tty.c:2198
3 locks held by kworker/1:3/4273:
2 locks held by syz-executor/9116:
#0: ffff888143baa0e0 (&type->s_umount_key#57){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:362
#1: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8d333d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
2 locks held by syz.6.911/9301:
2 locks held by syz.6.911/9309:
2 locks held by syz.6.911/9314:
#0: ffff888073f6e460 (sb_writers#28){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff888055bc1c48 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888055bc1c48 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: open_last_lookups fs/namei.c:3547 [inline]
#1: ffff888055bc1c48 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: path_openat+0x7b6/0x2e60 fs/namei.c:3780
1 lock held by syz.6.911/9316:
#0: ffff888055bc1c48 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff888055bc1c48 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
1 lock held by syz.6.911/9317:
#0: ffff888055bc1c48 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff888055bc1c48 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
2 locks held by kworker/0:5/10960:
#0: ffff888017c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
#1: ffffc90003957d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x806/0x1260 kernel/workqueue.c:2267
3 locks held by syz.5.1337/11828:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ca/0x430 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11843 Comm: rm Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:792 [inline]
RIP: 0010:mt_find+0x2c6/0xc60 lib/maple_tree.c:6532
Code: c7 40 e7 32 8d 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 48 89 44 24 68 50 e8 85 fb c2 f6 48 83 c4 08 e8 ec 6e 09 00 89 c3 <31> ff 89 c6 e8 e1 e5 e2 f6 85 db 74 18 e8 88 dd cb f6 84 c0 4c 8d
RSP: 0018:ffffc9000c327380 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff88802f415940
RDX: dffffc0000000000 RSI: ffffffff8b0c1dc0 RDI: ffffffff8b5f5fe0
RBP: ffffc9000c327510 R08: dffffc0000000000 R09: fffffbfff225704d
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001864e8c
R13: ffffc9000c327478 R14: dffffc0000000000 R15: 00007fabcbd9a000
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fabcbe58108 CR3: 0000000029ed0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
find_vma mm/mmap.c:1886 [inline]
__vma_adjust+0x204/0x1f40 mm/mmap.c:626
__split_vma+0x36c/0x4c0 mm/mmap.c:-1
do_mas_align_munmap+0x42f/0x15a0 mm/mmap.c:2468
do_mas_munmap+0x246/0x2b0 mm/mmap.c:2638
__mmap_region mm/mmap.c:2686 [inline]
mmap_region+0x8d4/0x2660 mm/mmap.c:2904
do_mmap+0x8c5/0xf60 mm/mmap.c:1424
vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520
ksys_mmap_pgoff+0x4f5/0x6d0 mm/mmap.c:1470
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fabcbe7ab74
Code: 63 08 44 89 e8 5b 41 5c 41 5d c3 41 89 ca 41 f7 c1 ff 0f 00 00 74 0c c7 05 f5 46 01 00 16 00 00 00 eb 17 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 dc 46 01 00 48 83 c8 ff c3 0f
RSP: 002b:00007fffa4ef11d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fffa4ef1218 RCX: 00007fabcbe7ab74
RDX: 0000000000000005 RSI: 0000000000123000 RDI: 00007fabcbc11000
RBP: 00007fffa4ef1970 R08: 0000000000000003 R09: 0000000000028000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007fabcbe5d5c0
R13: 00007fffa4ef19f8 R14: 0000000000027f38 R15: 0000000000000000