INFO: task kworker/u4:0:9 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:0 state:D stack: 0 pid: 9 ppid: 2 flags:0x00000008 Workqueue: events_unbound quota_release_workfn Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 schedule_timeout+0xc8/0x2f4 kernel/time/timer.c:2093 do_wait_for_common+0x1fc/0x368 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 __synchronize_srcu+0x270/0x308 kernel/rcu/srcutree.c:930 synchronize_srcu+0x194/0x1ac kernel/rcu/srcutree.c:-1 quota_release_workfn+0x104/0x618 fs/quota/dquot.c:852 process_one_work+0x7a4/0x1178 kernel/workqueue.c:2310 worker_thread+0x8fc/0x103c kernel/workqueue.c:2457 kthread+0x37c/0x460 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:856 INFO: task syz.1.17:4603 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.17 state:D stack: 0 pid: 4603 ppid: 4446 flags:0x00000001 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 io_schedule+0x84/0x160 kernel/sched/core.c:8503 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbc/0x1e8 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x130/0x184 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x80/0xb8 fs/buffer.c:69 lock_buffer include/linux/buffer_head.h:402 [inline] ext4_quota_write+0x330/0x558 fs/ext4/super.c:6638 qtree_write_dquot+0x1a8/0x3f4 fs/quota/quota_tree.c:422 v2_write_dquot+0xf0/0x180 fs/quota/quota_v2.c:358 dquot_commit+0x12c/0x1c8 fs/quota/dquot.c:539 ext4_write_dquot+0x1b4/0x320 fs/ext4/super.c:6212 ext4_mark_dquot_dirty+0xe8/0x150 fs/ext4/super.c:6289 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:437 dquot_alloc_inode+0x680/0xbf0 fs/quota/dquot.c:1823 ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:866 [inline] ext4_xattr_set_entry+0x7b8/0x2f28 fs/ext4/xattr.c:1671 ext4_xattr_block_set+0x9b8/0x2738 fs/ext4/xattr.c:1926 ext4_xattr_set_handle+0xa20/0x1074 fs/ext4/xattr.c:2409 ext4_xattr_set+0x1e8/0x2b4 fs/ext4/xattr.c:2510 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x374/0x390 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277 vfs_setxattr+0x158/0x2a8 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x278/0x2f8 fs/xattr.c:611 path_setxattr+0x130/0x260 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xc4/0xe0 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 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 INFO: task syz.3.19:4676 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.19 state:D stack: 0 pid: 4676 ppid: 4451 flags:0x00000001 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 io_schedule+0x84/0x160 kernel/sched/core.c:8503 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbc/0x1e8 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x130/0x184 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x80/0xb8 fs/buffer.c:69 lock_buffer include/linux/buffer_head.h:402 [inline] ext4_quota_write+0x330/0x558 fs/ext4/super.c:6638 qtree_write_dquot+0x1a8/0x3f4 fs/quota/quota_tree.c:422 v2_write_dquot+0xf0/0x180 fs/quota/quota_v2.c:358 dquot_commit+0x12c/0x1c8 fs/quota/dquot.c:539 ext4_write_dquot+0x1b4/0x320 fs/ext4/super.c:6212 ext4_mark_dquot_dirty+0xe8/0x150 fs/ext4/super.c:6289 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:437 dquot_alloc_inode+0x680/0xbf0 fs/quota/dquot.c:1823 ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:866 [inline] ext4_xattr_set_entry+0x7b8/0x2f28 fs/ext4/xattr.c:1671 ext4_xattr_block_set+0x9b8/0x2738 fs/ext4/xattr.c:1926 ext4_xattr_set_handle+0xa20/0x1074 fs/ext4/xattr.c:2409 ext4_xattr_set+0x1e8/0x2b4 fs/ext4/xattr.c:2510 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x374/0x390 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277 vfs_setxattr+0x158/0x2a8 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x278/0x2f8 fs/xattr.c:611 path_setxattr+0x130/0x260 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xc4/0xe0 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 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 INFO: task syz.2.18:4690 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.18 state:D stack: 0 pid: 4690 ppid: 4449 flags:0x00000001 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 io_schedule+0x84/0x160 kernel/sched/core.c:8503 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbc/0x1e8 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x130/0x184 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x80/0xb8 fs/buffer.c:69 lock_buffer include/linux/buffer_head.h:402 [inline] ext4_quota_write+0x330/0x558 fs/ext4/super.c:6638 qtree_write_dquot+0x1a8/0x3f4 fs/quota/quota_tree.c:422 v2_write_dquot+0xf0/0x180 fs/quota/quota_v2.c:358 dquot_commit+0x12c/0x1c8 fs/quota/dquot.c:539 ext4_write_dquot+0x1b4/0x320 fs/ext4/super.c:6212 ext4_mark_dquot_dirty+0xe8/0x150 fs/ext4/super.c:6289 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:437 dquot_alloc_inode+0x680/0xbf0 fs/quota/dquot.c:1823 ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:866 [inline] ext4_xattr_set_entry+0x7b8/0x2f28 fs/ext4/xattr.c:1671 ext4_xattr_block_set+0x9b8/0x2738 fs/ext4/xattr.c:1926 ext4_xattr_set_handle+0xa20/0x1074 fs/ext4/xattr.c:2409 ext4_xattr_set+0x1e8/0x2b4 fs/ext4/xattr.c:2510 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x374/0x390 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277 vfs_setxattr+0x158/0x2a8 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x278/0x2f8 fs/xattr.c:611 path_setxattr+0x130/0x260 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xc4/0xe0 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 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 INFO: task syz.0.16:4764 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack: 0 pid: 4764 ppid: 4443 flags:0x00000001 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 io_schedule+0x84/0x160 kernel/sched/core.c:8503 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbc/0x1e8 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x130/0x184 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x80/0xb8 fs/buffer.c:69 lock_buffer include/linux/buffer_head.h:402 [inline] ext4_quota_write+0x330/0x558 fs/ext4/super.c:6638 qtree_write_dquot+0x1a8/0x3f4 fs/quota/quota_tree.c:422 v2_write_dquot+0xf0/0x180 fs/quota/quota_v2.c:358 dquot_commit+0x12c/0x1c8 fs/quota/dquot.c:539 ext4_write_dquot+0x1b4/0x320 fs/ext4/super.c:6212 ext4_mark_dquot_dirty+0xe8/0x150 fs/ext4/super.c:6289 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:437 dquot_alloc_inode+0x680/0xbf0 fs/quota/dquot.c:1823 ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:866 [inline] ext4_xattr_set_entry+0x7b8/0x2f28 fs/ext4/xattr.c:1671 ext4_xattr_block_set+0x9b8/0x2738 fs/ext4/xattr.c:1926 ext4_xattr_set_handle+0xa20/0x1074 fs/ext4/xattr.c:2409 ext4_xattr_set+0x1e8/0x2b4 fs/ext4/xattr.c:2510 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x374/0x390 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277 vfs_setxattr+0x158/0x2a8 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x278/0x2f8 fs/xattr.c:611 path_setxattr+0x130/0x260 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xc4/0xe0 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 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 INFO: task syz.4.20:4768 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.20 state:D stack: 0 pid: 4768 ppid: 4452 flags:0x00000001 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe20/0x1c6c kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 io_schedule+0x84/0x160 kernel/sched/core.c:8503 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbc/0x1e8 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x130/0x184 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x80/0xb8 fs/buffer.c:69 lock_buffer include/linux/buffer_head.h:402 [inline] ext4_quota_write+0x330/0x558 fs/ext4/super.c:6638 qtree_write_dquot+0x1a8/0x3f4 fs/quota/quota_tree.c:422 v2_write_dquot+0xf0/0x180 fs/quota/quota_v2.c:358 dquot_commit+0x12c/0x1c8 fs/quota/dquot.c:539 ext4_write_dquot+0x1b4/0x320 fs/ext4/super.c:6212 ext4_mark_dquot_dirty+0xe8/0x150 fs/ext4/super.c:6289 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:437 dquot_alloc_inode+0x680/0xbf0 fs/quota/dquot.c:1823 ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:866 [inline] ext4_xattr_set_entry+0x7b8/0x2f28 fs/ext4/xattr.c:1671 ext4_xattr_block_set+0x9b8/0x2738 fs/ext4/xattr.c:1926 ext4_xattr_set_handle+0xa20/0x1074 fs/ext4/xattr.c:2409 ext4_xattr_set+0x1e8/0x2b4 fs/ext4/xattr.c:2510 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x374/0x390 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277 vfs_setxattr+0x158/0x2a8 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x278/0x2f8 fs/xattr.c:611 path_setxattr+0x130/0x260 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xc4/0xe0 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 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+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff80001b4f7c40 ((quota_release_work).work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 1 lock held by khungtaskd/27: #0: ffff800014561460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312 4 locks held by kworker/u4:4/745: #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff8000204d7c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff8000164abd50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0xab8 net/core/net_namespace.c:589 #3: ffff8000164b78e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 3 locks held by kworker/1:2/3336: 2 locks held by getty/3802: #0: ffff0000d4edb098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001bfae2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf90 drivers/tty/n_tty.c:2158 3 locks held by kworker/0:9/4155: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff80001fc97c40 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff8000164b78e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 2 locks held by kworker/u4:6/4201: 6 locks held by syz.1.17/4603: #0: ffff0000d3f38460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000e2a4dda8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e2a4dda8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000e2a4da80 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000e2a4da80 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f39ee0a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000d3f38208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.3.19/4676: #0: ffff0000d6d1e460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000e2b153b0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e2b153b0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000e2b15088 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000e2b15088 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f39ee428 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000d6d1e208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.2.18/4690: #0: ffff0000d9880460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000e2b167a0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e2b167a0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000e2b16478 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000e2b16478 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f39ee5e8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000d9880208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.0.16/4764: #0: ffff0000cfd90460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f3a417e0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f3a417e0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000f3a414b8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000f3a414b8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f38b8428 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000cfd90208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.4.20/4768: #0: ffff0000f2fe6460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000cf9c5da8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000cf9c5da8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000cf9c5a80 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000cf9c5a80 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f38b87a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000f2fe6208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 3 locks held by kworker/u4:7/4769: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1 #1: ffff800020247c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285 #2: ffff8000164b78e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72 6 locks held by syz.5.21/4805: #0: ffff0000dd24a460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000e2bba1d8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e2bba1d8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000e2bb9eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000e2bb9eb0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f38b8968 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000dd24a208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.7.23/4858: #0: ffff0000da2f0460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f3a403f0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f3a403f0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000f3a400c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000f3a400c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f38b8ce8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000da2f0208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.6.22/4869: #0: ffff0000ca266460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000e2908de8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e2908de8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000e2908ac0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000e2908ac0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f39ee968 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000ca266208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.8.24/4909: #0: ffff0000f2a70460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000e290b5c8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e290b5c8 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000e290b2a0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000e290b2a0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f39eeb28 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000f2a70208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 6 locks held by syz.9.25/4913: #0: ffff0000d5e2c460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f44d03f0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f44d03f0 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:302 #2: ffff0000f44d00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:158 [inline] #2: ffff0000f44d00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x12c/0x1074 fs/ext4/xattr.c:2324 #3: ffff800014677198 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:312 #4: ffff0000f38b93e8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x1c8 fs/quota/dquot.c:532 #5: ffff0000d5e2c208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x80/0x180 fs/quota/quota_v2.c:356 1 lock held by syz-executor/24263: 1 lock held by syz-executor/25645: #0: ffff8000164b78e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff8000164b78e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x64c/0xcbc net/core/rtnetlink.c:5685 =============================================