INFO: task syz.0.17:5989 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:27352 pid:5989 tgid:5989 ppid:5769 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x172b/0x5550 kernel/sched/core.c:7228
__schedule_loop kernel/sched/core.c:7307 [inline]
rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7603
rt_mutex_slowlock_block kernel/locking/rtmutex.c:1669 [inline]
__rt_mutex_slowlock kernel/locking/rtmutex.c:1746 [inline]
__rt_mutex_slowlock_locked+0x1f3a/0x2560 kernel/locking/rtmutex.c:1786
rt_mutex_slowlock+0xbd/0x170 kernel/locking/rtmutex.c:1826
__rt_mutex_lock kernel/locking/rtmutex.c:1841 [inline]
rwbase_write_lock+0x14d/0x730 kernel/locking/rwbase_rt.c:245
inode_lock include/linux/fs.h:1024 [inline]
blkdev_fallocate+0x263/0x550 block/fops.c:882
vfs_fallocate+0x672/0x7f0 fs/open.c:338
__x64_sy[ 348.170353][ T39] ksys_fallocate fs/open.c:362 [inline]
__x64_sy[ 348.170353][ T39] __do_sys_fallocate fs/open.c:367 [inline]
__x64_sy[ 348.170353][ T39] __se_sys_fallocate fs/open.c:365 [inline]
__x64_sy[ 348.170353][ T39] __x64_sys_fallocate+0xc0/0x110 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb6b5d7ce59
RSP: 002b:00007fff9a766fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fb6b5ff5fa0 RCX: 00007fb6b5d7ce59
RDX: 0000000000000600 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007fb6b5e12d6f R08: 0000000000000000 R09: 0000000000000000
R10: 001800000007c000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb6b5ff5fac R14: 00007fb6b5ff5fa0 R15: 00007fb6b5ff5fa0
INFO: task syz.2.19:5991 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19 state:D stack:27352 pid:5991 tgid:5991 ppid:5774 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x172b/0x5550 kernel/sched/core.c:7228
__schedule_loop kernel/sched/core.c:7307 [inline]
rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7603
rt_mutex_slowlock_block kernel/locking/rtmutex.c:1669 [inline]
__rt_mutex_slowlock kernel/locking/rtmutex.c:1746 [inline]
__rt_mutex_slowlock_locked+0x1f3a/0x2560 kernel/locking/rtmutex.c:1786
rt_mutex_slowlock+0xbd/0x170 kernel/locking/rtmutex.c:1826
__rt_mutex_lock kernel/locking/rtmutex.c:1841 [inline]
rwbase_write_lock+0x14d/0x730 kernel/locking/rwbase_rt.c:245
inode_lock include/linux/fs.h:1024 [inline]
blkdev_fallocate+0x263/0x550 block/fops.c:882
vfs_fallocate+0x672/0x7f0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xc0/0x110 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0eb16bce59
RSP: 002b:00007ffcc9d5e948 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f0eb1935fa0 RCX: 00007f0eb16bce59
RDX: 0000000000000600 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007f0eb1752d6f R08: 0000000000000000 R09: 0000000000000000
R10: 001800000007c000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0eb1935fac R14: 00007f0eb1935fa0 R15: 00007f0eb1935fa0
INFO: task syz.3.20:5992 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20 state:D stack:26136 pid:5992 tgid:5992 ppid:5775 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x172b/0x5550 kernel/sched/core.c:7228
__schedule_loop kernel/sched/core.c:7307 [inline]
rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7603
rt_mutex_slowlock_block kernel/locking/rtmutex.c:1669 [inline]
__rt_mutex_slowlock kernel/locking/rtmutex.c:1746 [inline]
__rt_mutex_slowlock_locked+0x1f3a/0x2560 kernel/locking/rtmutex.c:1786
rt_mutex_slowlock+0xbd/0x170 kernel/locking/rtmutex.c:1826
__rt_mutex_lock kernel/locking/rtmutex.c:1841 [inline]
rwbase_write_lock+0x14d/0x730 kernel/locking/rwbase_rt.c:245
inode_lock include/linux/fs.h:1024 [inline]
blkdev_fallocate+0x263/0x550 block/fops.c:882
vfs_fallocate+0x672/0x7f0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xc0/0x110 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f927404ce59
RSP: 002b:00007ffe8edce188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f92742c5fa0 RCX: 00007f927404ce59
RDX: 0000000000000600 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007f92740e2d6f R08: 0000000000000000 R09: 0000000000000000
R10: 001800000007c000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f92742c5fac R14: 00007f92742c5fa0 R15: 00007f92742c5fa0
Showing all locks held in the system:
6 locks held by kworker/1:0/32:
#0: ffff88813fe56538 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x897/0x1630 kernel/workqueue.c:3301
#1: ffffc90000a6fc40 ((work_completion)(&(&tbl->gc_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8be/0x1630 kernel/workqueue.c:3302
#2: ffffffff8e261520 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#4: ffffffff8f8e0778 (&tbl->lock){+...}-{3:3}, at: spin_lock_bh include/linux/spinlock_rt.h:90 [inline]
#4: ffffffff8f8e0778 (&tbl->lock){+...}-{3:3}, at: neigh_periodic_work+0xc64/0xe90 net/core/neighbour.c:1037
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
1 lock held by khungtaskd/39:
#0: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6777
4 locks held by kworker/0:2/822:
#0: ffff88813fe56538 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x897/0x1630 kernel/workqueue.c:3301
#1: ffffc90005537c40 ((gc_work).work){+.+.}-{0:0}, at: process_one_work+0x8be/0x1630 kernel/workqueue.c:3302
#2: ffffffff8eeef1f8 ("ratelimiter_table_lock"){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#2: ffffffff8eeef1f8 ("ratelimiter_table_lock"){+.+.}-{3:3}, at: wg_ratelimiter_gc_entries+0x5d/0x480 drivers/net/wireguard/ratelimiter.c:63
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
2 locks held by kworker/u8:13/2990:
#0: ffff88801ae94138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x897/0x1630 kernel/workqueue.c:3301
#1: ffffc9000dc0fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x8be/0x1630 kernel/workqueue.c:3302
8 locks held by kworker/u8:16/3495:
#0: ffff888031df5938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x897/0x1630 kernel/workqueue.c:3301
#1: ffffc9000e9efc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8be/0x1630 kernel/workqueue.c:3302
#2: ffffffff8f7b0bb8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8f7b0bb8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x124/0x1680 net/ipv6/addrconf.c:4221
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#3: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: ndisc_send_skb+0x215/0x1670 net/ipv6/ndisc.c:482
#4: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#4: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#4: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: ip6_output+0x126/0x550 net/ipv6/ip6_output.c:234
#5: ffffffff8e261520 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#6: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#7: ffffffff8f8e0778 (&tbl->lock){+...}-{3:3}, at: spin_lock_bh include/linux/spinlock_rt.h:90 [inline]
#7: ffffffff8f8e0778 (&tbl->lock){+...}-{3:3}, at: ___neigh_create+0xf0b/0x2360 net/core/neighbour.c:686
2 locks held by getty/5367:
#0: ffff888036d2b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003cbe2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x465/0x1490 drivers/tty/n_tty.c:2211
2 locks held by syz.1.18/5976:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
#1: ffff8880232032d8 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline]
#1: ffff8880232032d8 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_fallocate+0x294/0x550 block/fops.c:883
1 lock held by syz.0.17/5989:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.2.19/5991:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.3.20/5992:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.4.21/6134:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.5.22/6158:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.7.24/6159:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.6.23/6160:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.8.25/6277:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.9.26/6300:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.1.27/6322:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.0.28/6324:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.2.29/6408:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.3.30/6444:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.4.31/6503:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.5.32/6504:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.6.33/6546:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
6 locks held by syz-executor/6615:
#0: ffffffff8f821ac0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1217
#1: ffffffff8f7b0bb8 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_pre_doit+0x5f/0x8d0 net/wireless/nl80211.c:19287
#2: ffff88806c5c08d8 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: wiphy_lock include/net/cfg80211.h:6868 [inline]
#2: ffff88806c5c08d8 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: nl80211_pre_doit+0x3f0/0x8d0 net/wireless/nl80211.c:19360
#3: ffff88805e7ce960 (&sb->s_type->i_mutex_key#4/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
#3: ffff88805e7ce960 (&sb->s_type->i_mutex_key#4/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
#3: ffff88805e7ce960 (&sb->s_type->i_mutex_key#4/1){+.+.}-{4:4}, at: start_dirop+0x4f/0x90 fs/namei.c:2942
#4: ffff88805e7fd858 (&sb->s_type->i_lock_key#9){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#4: ffff88805e7fd858 (&sb->s_type->i_lock_key#9){+.+.}-{3:3}, at: d_make_persistent+0x74/0x180 fs/dcache.c:2971
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#5: ffffffff8e3cb2a0 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
1 lock held by syz.7.34/6616:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz.8.35/6686:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
1 lock held by syz-executor/6695:
#0: ffffffff8f7b0bb8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff8f7b0bb8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#0: ffffffff8f7b0bb8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x883/0x1bb0 net/core/rtnetlink.c:4150
1 lock held by syz.9.36/6705:
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#0: ffff888023203108 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_fallocate+0x263/0x550 block/fops.c:882
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 39 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd3/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 17 Comm: pr/legacy Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:io_serial_in+0x77/0xc0 drivers/tty/serial/8250/8250_port.c:401
Code: e8 6e 25 78 fc 44 89 f9 d3 e3 49 83 ee 80 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 2f fd e3 fc 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 44 89 f9 80 e1 07
RSP: 0018:ffffc900001679f0 EFLAGS: 00000202
RAX: 1ffffffff3404100 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff9a020f90 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff854da5e0 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff9a020d00 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125a6b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5a74627048 CR3: 000000006945a000 CR4: 00000000003526f0
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:128 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:150 [inline]
wait_for_lsr+0x1aa/0x2f0 drivers/tty/serial/8250/8250_port.c:1982
serial8250_fifo_wait_for_lsr_thre drivers/tty/serial/8250/8250_port.c:3229 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3294 [inline]
serial8250_console_write+0x114b/0x1b50 drivers/tty/serial/8250/8250_port.c:3379
console_emit_next_record kernel/printk/printk.c:3163 [inline]
console_flush_one_record+0x68b/0xb90 kernel/printk/printk.c:3269
legacy_kthread_func+0x1b6/0x250 kernel/printk/printk.c:3712
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245