INFO: task syz.2.77:6402 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.77 state:D stack:24744 pid:6402 tgid:6401 ppid:5822 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
__wait_on_freeing_inode+0x166/0x3b0 fs/inode.c:2619
find_inode_fast+0x3e0/0x740 fs/inode.c:1098
iget_locked+0xd0/0x6a0 fs/inode.c:1464
__ext4_iget+0x242/0x45b0 fs/ext4/inode.c:5301
ext4_xattr_inode_cache_find fs/ext4/xattr.c:1552 [inline]
ext4_xattr_inode_lookup_create+0x492/0x1d20 fs/ext4/xattr.c:1591
ext4_xattr_block_set+0x220/0x2a80 fs/ext4/xattr.c:1920
ext4_xattr_set_handle+0x12e3/0x1540 fs/ext4/xattr.c:2459
ext4_xattr_set+0x257/0x340 fs/ext4/xattr.c:2561
__vfs_setxattr+0x442/0x480 fs/xattr.c:223
__vfs_setxattr_noperm+0x12a/0x660 fs/xattr.c:257
vfs_setxattr+0x163/0x360 fs/xattr.c:344
do_setxattr fs/xattr.c:662 [inline]
filename_setxattr+0x296/0x630 fs/xattr.c:690
path_setxattrat+0x408/0x450 fs/xattr.c:734
__do_sys_setxattr fs/xattr.c:768 [inline]
__se_sys_setxattr fs/xattr.c:764 [inline]
__x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:764
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: 0033:0x7f28bf19ce59
RSP: 002b:00007f28be7f6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f28bf415fa0 RCX: 00007f28bf19ce59
RDX: 0000200000001880 RSI: 0000200000000100 RDI: 0000200000000040
RBP: 00007f28bf232e6f R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000e01 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f28bf416038 R14: 00007f28bf415fa0 R15: 00007ffc9f950e58
INFO: task syz.2.77:6410 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.77 state:D stack:27360 pid:6410 tgid:6401 ppid:5822 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x1709/0x5530 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
mb_cache_entry_wait_unused+0x17d/0x280 fs/mbcache.c:148
ext4_evict_ea_inode+0x14d/0x2f0 fs/ext4/xattr.c:481
ext4_evict_inode+0x169/0x10c0 fs/ext4/inode.c:187
evict+0x624/0xb50 fs/inode.c:825
ext4_xattr_set_entry+0x179a/0x1ed0 fs/ext4/xattr.c:1851
ext4_xattr_block_set+0x1865/0x2a80 fs/ext4/xattr.c:1963
ext4_xattr_set_handle+0xe35/0x1540 fs/ext4/xattr.c:2433
ext4_xattr_set+0x257/0x340 fs/ext4/xattr.c:2561
__vfs_removexattr+0x41c/0x450 fs/xattr.c:544
__vfs_removexattr_locked+0xe2/0x280 fs/xattr.c:579
vfs_removexattr+0x7f/0x230 fs/xattr.c:601
removexattr fs/xattr.c:1036 [inline]
filename_removexattr fs/xattr.c:1064 [inline]
path_removexattrat+0x3cd/0x760 fs/xattr.c:1097
__do_sys_lremovexattr fs/xattr.c:1115 [inline]
__se_sys_lremovexattr fs/xattr.c:1112 [inline]
__x64_sys_lremovexattr+0x65/0x80 fs/xattr.c:1112
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: 0033:0x7f28bf19ce59
RSP: 002b:00007f28be7b4028 EFLAGS: 00000246 ORIG_RAX: 00000000000000c6
RAX: ffffffffffffffda RBX: 00007f28bf416180 RCX: 00007f28bf19ce59
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000200000000000
RBP: 00007f28bf232e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f28bf416218 R14: 00007f28bf416180 R15: 00007ffc9f950e58
Showing all locks held in the system:
4 locks held by pr/legacy/17:
#0: ffffffff8dfb5240 (console_lock){+.+.}-{0:0}, at: legacy_kthread_func+0x1a3/0x250 kernel/printk/printk.c:3711
#1: ffffffff8de9cb38 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:305 [inline]
#1: ffffffff8de9cb38 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline]
#1: ffffffff8de9cb38 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline]
#1: ffffffff8de9cb38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0xfa/0xb50 kernel/printk/printk.c:3246
#2: ffffffff99bbed18 (&port_lock_key){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#2: ffffffff99bbed18 (&port_lock_key){+.+.}-{3:3}, at: uart_port_lock_irqsave include/linux/serial_core.h:719 [inline]
#2: ffffffff99bbed18 (&port_lock_key){+.+.}-{3:3}, at: serial8250_console_write+0x17c/0x1b40 drivers/tty/serial/8250/8250_port.c:3338
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
1 lock held by khungtaskd/38:
#0: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6777
2 locks held by klogd/4970:
#0: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: sock_def_readable+0xae/0x550 net/core/sock.c:3653
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
2 locks held by getty/5365:
#0: ffff888032c8e0a0 (&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+0x460/0x1360 drivers/tty/n_tty.c:2211
5 locks held by kworker/u8:1/5728:
#0: ffff88813fe8c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc90004707c60 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#2: ffff888026b0a310 (&devlink->lock_key#7){+.+.}-{4:4}, at: nsim_dev_trap_report_work+0x57/0xcb0 drivers/net/netdevsim/dev.c:909
#3: ffffffff99af3d20 (&obj_hash[i].lock){-...}-{2:2}, at: debug_object_activate+0xa8/0x3b0 lib/debugobjects.c:873
#4: ffff88802a4ea8e0 (_T->lock){....}-{2:2}, at: rt_mutex_slowunlock+0xbf/0xa20 kernel/locking/rtmutex.c:1430
2 locks held by kworker/u8:4/5743:
#0: ffff88803124e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc90004897c60 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
6 locks held by kworker/u8:6/5745:
#0: ffff88813fe8c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc900048b7c60 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#2: ffff88803d06e310 (&devlink->lock_key#9){+.+.}-{4:4}, at: nsim_dev_trap_report_work+0x57/0xcb0 drivers/net/netdevsim/dev.c:909
#3: ffff88805a2c5520 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#3: ffff88805a2c5520 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: nsim_dev_trap_report drivers/net/netdevsim/dev.c:862 [inline]
#3: ffff88805a2c5520 (&nsim_trap_data->trap_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x1e0/0xcb0 drivers/net/netdevsim/dev.c:922
#4: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#5: ffff88805c860228 (&rdev->bss_lock){+...}-{3:3}, at: spin_lock_bh include/linux/spinlock_rt.h:90 [inline]
#5: ffff88805c860228 (&rdev->bss_lock){+...}-{3:3}, at: cfg80211_inform_single_bss_data+0xc22/0x1bf0 net/wireless/scan.c:2374
6 locks held by kworker/u8:8/5788:
#0: ffff88813fe8c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc90004867c60 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#2: ffff88805d5108d8 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6884 [inline]
#2: ffff88805d5108d8 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xb4/0x420 net/wireless/core.c:524
#3: ffffffff8de591e0 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#4: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#5: ffff88805d510228 (&rdev->bss_lock){+...}-{3:3}, at: spin_lock_bh include/linux/spinlock_rt.h:90 [inline]
#5: ffff88805d510228 (&rdev->bss_lock){+...}-{3:3}, at: cfg80211_put_bss+0x5b/0x270 net/wireless/scan.c:3356
8 locks held by kworker/u8:10/5790:
#0: ffff88813fe8c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffff8880b8724540 (psi_seq){-...}-{0:0}, at: psi_task_switch+0x57/0x7d0 kernel/sched/psi.c:933
#2: ffff888061e10898 (_T->lock){....}-{2:2}, at: rt_mutex_slowunlock+0xbe/0x460 kernel/locking/rtmutex.c:1430
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: ieee80211_sta_active_ibss+0xc7/0x330 net/mac80211/ibss.c:628
#4: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420 kernel/softirq.c:163
#5: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#5: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#5: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#5: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
#6: ffff8880458be2c8 (_T->lock){....}-{2:2}, at: rt_mutex_slowunlock+0xbf/0xa20 kernel/locking/rtmutex.c:1430
#7: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#7: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#7: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
#7: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x8f/0x2550 arch/x86/kernel/unwind_orc.c:495
1 lock held by udevd/5938:
#0: ffffffff8e6fe378 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:187 [inline]
#0: ffffffff8e6fe378 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:294 [inline]
#0: ffffffff8e6fe378 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline]
#0: ffffffff8e6fe378 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_check_open_permission+0x1d3/0x470 security/tomoyo/file.c:772
2 locks held by kworker/0:7/6134:
#0: ffff88813fe4b938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
#1: ffffc90002f8fc60 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x8cd/0x12b0 kernel/workqueue.c:3301
2 locks held by udevd/6137:
#0: ffff8880236df348 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1039 [inline]
#0: ffff8880236df348 (&sb->s_type->i_mutex_key#10){++++}-{4:4}, at: blkdev_read_iter+0x2e6/0x430 block/fops.c:829
#1: ffff88813fe7acb0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:611 [inline]
#1: ffff88813fe7acb0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:441 [inline]
#1: ffff88813fe7acb0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x36/0x340 mm/mmap_lock.c:501
2 locks held by udevd/6179:
#0: ffff888026e1c4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xde/0xd00 block/bdev.c:948
#1: ffff888026e1f498 (&lo->lo_mutex){+.+.}-{4:4}, at: lo_open+0x4f/0xd0 drivers/block/loop.c:1716
1 lock held by udevd/6181:
#0: ffff888029cef030 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_downgrade include/linux/mmap_lock.h:586 [inline]
#0: ffff888029cef030 (&mm->mmap_lock){++++}-{4:4}, at: vms_complete_munmap_vmas+0x224/0xbe0 mm/vma.c:1340
3 locks held by syz.2.77/6402:
#0: ffff88805d250500 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff88805c23a7b0 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#1: ffff88805c23a7b0 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:343
#2: ffff88805c23a440 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88805c23a440 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x194/0x1540 fs/ext4/xattr.c:2374
3 locks held by syz.2.77/6410:
#0: ffff88805d250500 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff88805c02b388 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#1: ffff88805c02b388 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_removexattr+0x6c/0x230 fs/xattr.c:600
#2: ffff88805c02b018 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88805c02b018 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x194/0x1540 fs/ext4/xattr.c:2374
3 locks held by syz.0.198/7065:
#0: ffff88804c94a500 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff88805c136ec0 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#1: ffff88805c136ec0 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:343
#2: ffff88805c136b50 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88805c136b50 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x194/0x1540 fs/ext4/xattr.c:2374
3 locks held by syz.0.198/7068:
#0: ffff88804c94a500 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff88805f615710 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#1: ffff88805f615710 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_removexattr+0x6c/0x230 fs/xattr.c:600
#2: ffff88805f6153a0 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88805f6153a0 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x194/0x1540 fs/ext4/xattr.c:2374
3 locks held by syz.3.222/7178:
#0: ffff8880597aa500 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff88805c02d710 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#1: ffff88805c02d710 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:343
#2: ffff88805c02d3a0 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88805c02d3a0 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x194/0x1540 fs/ext4/xattr.c:2374
3 locks held by syz.3.222/7183:
#0: ffff8880597aa500 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
#1: ffff88805c103f60 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
#1: ffff88805c103f60 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: vfs_removexattr+0x6c/0x230 fs/xattr.c:600
#2: ffff88805c103bf0 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
#2: ffff88805c103bf0 (&ei->xattr_sem){++++}-{4:4}, at: ext4_xattr_set_handle+0x194/0x1540 fs/ext4/xattr.c:2374
4 locks held by syz-executor/7421:
#0: ffff88805a4780d0 (&type->s_umount_key#34){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805a4780d0 (&type->s_umount_key#34){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff88805a4780d0 (&type->s_umount_key#34){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
#1: ffff88805b8e43c0 (&sbi->s_error_notify_mutex){+.+.}-{4:4}, at: ext4_unregister_sysfs+0x93/0xc0 fs/ext4/sysfs.c:653
#2: ffff88801baeb348 (&root->kernfs_supers_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3f/0x140 fs/kernfs/dir.c:1791
#3: ffff88801baeb238 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x4e/0x140 fs/kernfs/dir.c:1792
4 locks held by syz-executor/7549:
#0: ffff8880297680d0 (&type->s_umount_key#34){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880297680d0 (&type->s_umount_key#34){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
#0: ffff8880297680d0 (&type->s_umount_key#34){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:509
#1: ffff88802bf3c3c0 (&sbi->s_error_notify_mutex){+.+.}-{4:4}, at: ext4_unregister_sysfs+0x93/0xc0 fs/ext4/sysfs.c:653
#2: ffff88801baeb348 (&root->kernfs_supers_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3f/0x140 fs/kernfs/dir.c:1791
#3: ffff88801baeb238 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x4e/0x140 fs/kernfs/dir.c:1792
4 locks held by udevd/8949:
#0: ffff8880b8733e28 ((lock)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#0: ffff8880b8733e28 ((lock)#2){+.+.}-{3:3}, at: lru_add_drain+0x136/0x3f0 mm/swap.c:787
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#1: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
#2: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rt_mutex_slowunlock+0xbf/0xa20 kernel/locking/rtmutex.c:1430
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: get_non_dying_memcg_start mm/memcontrol.c:817 [inline]
#3: ffffffff8dfc3080 (rcu_read_lock){....}-{1:3}, at: mod_memcg_lruvec_state+0xd5/0x270 mm/memcontrol.c:947
3 locks held by syz.1.981/10980:
#0: ffff88803a2f40d0 (&type->s_umount_key#30/1){+.+.}-{4:4}, at: alloc_super fs/super.c:345 [inline]
#0: ffff88803a2f40d0 (&type->s_umount_key#30/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1910 fs/super.c:766
#1: ffff8880604443c0 (&sbi->s_error_notify_mutex){+.+.}-{4:4}, at: ext4_register_sysfs+0x91/0x2d0 fs/ext4/sysfs.c:616
#2: ffff88801baeb238 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x41/0x5e0 fs/kernfs/dir.c:825
1 lock held by syz.5.982/10988:
#0: ffff888031fb20d0 (&type->s_umount_key#30/1){+.+.}-{4:4}, at: alloc_super fs/super.c:345 [inline]
#0: ffff888031fb20d0 (&type->s_umount_key#30/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1910 fs/super.c:766
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 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+0xfd7/0x1030 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: 21 Comm: rcuc/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:stack_trace_consume_entry+0x5/0x280 kernel/stacktrace.c:83
Code: c3 cc cc cc cc cc e8 0a 22 81 09 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 18 48 ba 00 00 00 00 00 fc ff
RSP: 0018:ffffc900001a77d8 EFLAGS: 00000282
RAX: ffffffff81ab4d80 RBX: ffffc900001a78a0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff81ab4d80 RDI: ffffc900001a78a0
RBP: ffffc900001a7870 R08: ffffc900001a7bd0 R09: 0000000000000000
R10: ffffc900001a7838 R11: ffffffff81afe220 R12: ffff88801d6edd00
R13: ffff88803847fd88 R14: ffffffff81afe220 R15: ffffc900001a77e8
FS: 0000000000000000(0000) GS:ffff888125ecd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fddb2456000 CR3: 000000003716c000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0x10f/0x150 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2705 [inline]
slab_free_after_rcu_debug+0x12a/0x220 mm/slub.c:6467
rcu_do_batch kernel/rcu/tree.c:2645 [inline]
rcu_core kernel/rcu/tree.c:2897 [inline]
rcu_cpu_kthread+0x950/0x1480 kernel/rcu/tree.c:2985
smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
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