INFO: task kworker/u4:2:8297 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:2 D25808 8297 2 0x80000000 Workqueue: writeback wb_workfn (flush-7:1) Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 queue_log_writer+0x27a/0x2d0 fs/reiserfs/journal.c:2990 check_journal_end fs/reiserfs/journal.c:3687 [inline] do_journal_end+0x8c0/0x4840 fs/reiserfs/journal.c:4054 reiserfs_write_inode+0x27a/0x2d0 fs/reiserfs/inode.c:1789 write_inode fs/fs-writeback.c:1244 [inline] __writeback_single_inode+0x733/0x11d0 fs/fs-writeback.c:1442 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 wb_writeback+0x28d/0xcc0 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1965 [inline] wb_workfn+0x29b/0x1250 fs/fs-writeback.c:2006 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.1:31276 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D25336 31276 8138 0x00000006 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 bit_wait+0x12/0x90 kernel/sched/wait_bit.c:197 __wait_on_bit+0x7e/0x150 kernel/sched/wait_bit.c:48 __inode_wait_for_writeback+0x153/0x1f0 fs/fs-writeback.c:1265 inode_wait_for_writeback+0x22/0x30 fs/fs-writeback.c:1277 evict+0x2b7/0x760 fs/inode.c:556 iput_final fs/inode.c:1555 [inline] iput+0x4f1/0x860 fs/inode.c:1581 dentry_unlink_inode+0x265/0x320 fs/dcache.c:374 d_delete+0x210/0x280 fs/dcache.c:2372 xattr_unlink+0x139/0x190 fs/reiserfs/xattr.c:96 lookup_and_delete_xattr fs/reiserfs/xattr.c:492 [inline] reiserfs_xattr_set_handle+0x88e/0xb40 fs/reiserfs/xattr.c:527 reiserfs_xattr_set+0x411/0x570 fs/reiserfs/xattr.c:631 trusted_set+0xa6/0xd0 fs/reiserfs/xattr_trusted.c:30 __vfs_removexattr+0xf3/0x160 fs/xattr.c:413 __vfs_removexattr_locked+0x15c/0x340 fs/xattr.c:445 vfs_removexattr+0xc1/0x240 fs/xattr.c:466 ovl_make_workdir fs/overlayfs/super.c:1139 [inline] ovl_get_workdir fs/overlayfs/super.c:1198 [inline] ovl_fill_super+0x13f9/0x3f10 fs/overlayfs/super.c:1601 mount_nodev+0x60/0x110 fs/super.c:1204 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fcfb8ba10c9 Code: Bad RIP value. RSP: 002b:00007fcfb7113168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fcfb8cc0f80 RCX: 00007fcfb8ba10c9 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007fcfb8bfcae9 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5c9452ff R14: 00007fcfb7113300 R15: 0000000000022000 INFO: task syz-executor.1:31301 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27728 31301 8138 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 wb_wait_for_completion+0x175/0x1f0 fs/fs-writeback.c:222 sync_inodes_sb+0x19d/0x9a0 fs/fs-writeback.c:2459 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem+0x15c/0x250 fs/sync.c:67 reiserfs_remount+0x150/0x1540 fs/reiserfs/super.c:1458 do_remount_sb+0x1a0/0x6a0 fs/super.c:888 do_remount fs/namespace.c:2313 [inline] do_mount+0x1a62/0x2f50 fs/namespace.c:2813 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fcfb8ba25fa Code: Bad RIP value. RSP: 002b:00007fcfaf0f1f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcfb8ba25fa RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00007fcfaf0f2020 R08: 00007fcfaf0f2020 R09: 0000000001a484bc R10: 0000000001a484bc R11: 0000000000000206 R12: 00000000200000c0 R13: 0000000020000100 R14: 00007fcfaf0f1fe0 R15: 00000000200009c0 Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 0000000026705778 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7798: #0: 0000000076c4ff36 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.4/8141: #0: 00000000c2ed259d (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000c2ed259d (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 2 locks held by kworker/u4:2/8297: #0: 000000001e510405 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000c63035a7 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 3 locks held by kworker/u4:8/12002: 4 locks held by syz-executor.1/31276: #0: 000000005338a8ed (&type->s_umount_key#47/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 000000005338a8ed (&type->s_umount_key#47/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 #1: 00000000a13bcb41 (sb_writers#24){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #1: 00000000a13bcb41 (sb_writers#24){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #2: 00000000d08c4c32 (&type->i_mutex_dir_key#13){++++}, at: inode_lock include/linux/fs.h:748 [inline] #2: 00000000d08c4c32 (&type->i_mutex_dir_key#13){++++}, at: vfs_removexattr+0xb2/0x240 fs/xattr.c:465 #3: 000000008ef01a65 (&type->i_mutex_dir_key#13/3){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #3: 000000008ef01a65 (&type->i_mutex_dir_key#13/3){+.+.}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:484 [inline] #3: 000000008ef01a65 (&type->i_mutex_dir_key#13/3){+.+.}, at: reiserfs_xattr_set_handle+0x7fd/0xb40 fs/reiserfs/xattr.c:527 2 locks held by syz-executor.1/31301: #0: 0000000044ce7743 (&type->s_umount_key#78){++++}, at: do_remount fs/namespace.c:2307 [inline] #0: 0000000044ce7743 (&type->s_umount_key#78){++++}, at: do_mount+0xa5b/0x2f50 fs/namespace.c:2813 #1: 00000000e66796e0 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 00000000e66796e0 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 1 lock held by syz-executor.4/1125: 2 locks held by syz-executor.0/1140: 2 locks held by syz-executor.3/1151: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1157 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:kasan_check_read+0x4/0x10 mm/kasan/kasan.c:272 Code: 89 d0 49 39 c1 75 11 49 0f be 01 41 83 e2 07 49 39 c2 0f 8c 4e ff ff ff 5b 44 89 c2 5d 41 5c e9 b2 18 00 00 66 90 48 8b 0c 24 <89> f6 31 d2 e9 83 fe ff ff 0f 1f 00 48 8b 0c 24 89 f6 ba 01 00 00 RSP: 0000:ffff888049107750 EFLAGS: 00000012 RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff817f1e03 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea00011b5bb0 RBP: 000000000000016e R08: 0000000000000000 R09: fffff94000236b6e R10: ffffea00011b5b77 R11: 0000000000000000 R12: ffffea00011b5b80 R13: ffffea00011b5bb0 R14: ffffea00011b5b74 R15: dffffc0000000000 FS: 00007fc3f2848700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc3eb329000 CR3: 00000000a5efc000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] page_expected_state mm/page_alloc.c:910 [inline] check_new_page mm/page_alloc.c:1879 [inline] check_new_pages mm/page_alloc.c:1920 [inline] rmqueue mm/page_alloc.c:3035 [inline] get_page_from_freelist+0x1c13/0x4170 mm/page_alloc.c:3373 __alloc_pages_nodemask+0x387/0x2890 mm/page_alloc.c:4399 __alloc_pages include/linux/gfp.h:496 [inline] __alloc_pages_node include/linux/gfp.h:509 [inline] alloc_pages_vma+0x461/0x780 mm/mempolicy.c:2154 do_huge_pmd_wp_page+0xa04/0x5370 mm/huge_memory.c:1349 wp_huge_pmd mm/memory.c:4076 [inline] __handle_mm_fault+0x2297/0x41c0 mm/memory.c:4289 handle_mm_fault+0x436/0xb10 mm/memory.c:4336 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0033:0x7fc3f42730c0 Code: e8 e5 fe ff ff 41 89 c7 85 c0 78 40 3d ff 00 00 00 7f 2f 49 8b 45 10 49 3b 45 08 0f 84 19 01 00 00 45 85 ff 74 0c 49 8b 55 00 <44> 88 3c 02 49 8b 45 10 48 83 c0 01 49 89 45 10 eb be 66 0f 1f 44 RSP: 002b:00007fc3f2847600 EFLAGS: 00010206 RAX: 0000000000f01000 RBX: 00007fc3f2847660 RCX: 0000000000000008 RDX: 00007fc3ea428000 RSI: 0000000000000000 RDI: 00007fc3f2847700 RBP: 000000000000000c R08: 0000000000000009 R09: 00000000000001a8 R10: 0000000000000010 R11: 00007fc3f2847660 R12: 00007fc3f2847670 R13: 00007fc3f2847700 R14: 0000000000000001 R15: 0000000000000021