INFO: task syz.1.17:5050 blocked for more than 143 seconds. Not tainted 5.15.184-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.17 state:D stack: 0 pid: 5050 ppid: 4849 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5030 [inline] __schedule+0xe00/0x1c0c kernel/sched/core.c:6376 schedule+0x11c/0x1c8 kernel/sched/core.c:6459 io_schedule+0x84/0x160 kernel/sched/core.c:8484 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xb4/0x1ec kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x11c/0x168 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x80/0xc0 fs/buffer.c:69 lock_buffer include/linux/buffer_head.h:402 [inline] ext4_quota_write+0x358/0x52c fs/ext4/super.c:6606 qtree_write_dquot+0x1a8/0x3f8 fs/quota/quota_tree.c:422 v2_write_dquot+0xf0/0x180 fs/quota/quota_v2.c:358 dquot_commit+0x128/0x1c4 fs/quota/dquot.c:514 ext4_write_dquot+0x1b4/0x31c fs/ext4/super.c:6180 ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6257 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412 dquot_alloc_inode+0x680/0xbfc fs/quota/dquot.c:1801 ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:883 [inline] ext4_xattr_set_entry+0x788/0x2d98 fs/ext4/xattr.c:1680 ext4_xattr_block_set+0x9a0/0x26fc fs/ext4/xattr.c:1935 ext4_xattr_set_handle+0xe3c/0x1050 fs/ext4/xattr.c:2421 ext4_xattr_set+0x1e0/0x2b4 fs/ext4/xattr.c:2522 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x248/0x2ac fs/xattr.c:611 path_setxattr+0x12c/0x25c fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001b2b7c00 ((quota_release_work).work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 1 lock held by khungtaskd/27: #0: ffff8000143211e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 4 locks held by kworker/u4:1/136: 1 lock held by udevd/3642: 2 locks held by getty/3800: #0: ffff0000d368e098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001b7802e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 3 locks held by kworker/1:10/4827: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001f897c00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 6 locks held by syz.1.17/5050: #0: ffff0000d7cac460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e83cf198 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e83cf198 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000e83cee70 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000e83cee70 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000ea50c0a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000d7cac208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.3.19/5425: #0: ffff0000d60f2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea67e7a0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea67e7a0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea67e478 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea67e478 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000e82ae0a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000d60f2208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.2.18/5429: #0: ffff0000c88f0460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea6b3fc0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea6b3fc0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea6b3c98 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea6b3c98 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000e82ae268 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000c88f0208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.0.16/5432: #0: ffff0000d4fc8460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea6b35c8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea6b35c8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea6b32a0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea6b32a0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000e82ae428 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000d4fc8208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 2 locks held by kworker/u4:7/5441: 6 locks held by syz.4.20/5450: #0: ffff0000d5076460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea67f198 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea67f198 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea67ee70 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea67ee70 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000ea50c428 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000d5076208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.5.21/5548: #0: ffff0000dae00460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea6b49b8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea6b49b8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea6b4690 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea6b4690 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000e82ae968 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000dae00208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 1 lock held by udevd/5555: 6 locks held by syz.7.23/5631: #0: ffff0000e7a06460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea67a1d8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea67a1d8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea679eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea679eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000ea50cb28 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000e7a06208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.6.22/5639: #0: ffff0000ed764460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea6c3fc0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea6c3fc0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea6c3c98 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea6c3c98 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000ea50cce8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000ed764208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 3 locks held by kworker/u4:8/5642: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283 #1: ffff80001ff67c00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285 #2: ffff800016278168 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 6 locks held by syz.8.24/5652: #0: ffff0000ce1a2460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea4621d8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea4621d8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea461eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea461eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000e82aece8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000ce1a2208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.9.25/5658: #0: ffff0000ed48c460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000ea6c83f0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000ea6c83f0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:302 #2: ffff0000ea6c80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff0000ea6c80c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x124/0x1050 fs/ext4/xattr.c:2336 #3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311 #4: ffff0000ea50d068 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507 #5: ffff0000ed48c208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 3 locks held by syz-executor/11857: 3 locks held by syz.1.5641/17060: =============================================