xfs_map_blocks+0x548/0x940 fs/xfs/xfs_aops.c:422 xfs_writepage_map fs/xfs/xfs_aops.c:964 [inline] xfs_do_writepage+0x422/0x13d0 fs/xfs/xfs_aops.c:1149 write_cache_pages+0x505/0xd20 mm/page-writeback.c:2257 INFO: task syz-executor.1:7996 blocked for more than 140 seconds. Not tainted 4.14.303-syzkaller #0 xfs_vm_writepages+0x258/0x340 fs/xfs/xfs_aops.c:1188 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. do_writepages+0xc3/0x240 mm/page-writeback.c:2361 syz-executor.1 D 25784 7996 1 0x00000004 Call Trace: __writeback_single_inode+0xda/0x1010 fs/fs-writeback.c:1382 context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 XFS (loop1): page discard on page ffffea0001094d80, inode 0x29, offset 1937408. wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x118/0x170 fs/fs-writeback.c:218 XFS (loop1): Internal error XFS_WANT_CORRUPTED_RETURN at line 431 of file fs/xfs/libxfs/xfs_alloc.c. Caller xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 CPU: 1 PID: 2818 Comm: kworker/u4:3 Not tainted 4.14.303-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: writeback wb_workfn (flush-7:1) Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 xfs_error_report fs/xfs/xfs_error.c:320 [inline] xfs_error_report+0x98/0xa0 fs/xfs/xfs_error.c:307 xfs_alloc_fixup_trees+0x425/0x4f0 fs/xfs/libxfs/xfs_alloc.c:446 xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 xfs_alloc_ag_vextent+0x579/0x750 fs/xfs/libxfs/xfs_alloc.c:702 sync_inodes_sb+0x173/0x880 fs/fs-writeback.c:2447 xfs_alloc_vextent+0x10b0/0x2010 fs/xfs/libxfs/xfs_alloc.c:2835 xfs_bmap_btalloc+0x9e5/0x1b20 fs/xfs/libxfs/xfs_bmap.c:3733 xfs_bmap_alloc+0x107/0x160 fs/xfs/libxfs/xfs_bmap.c:3823 xfs_bmapi_allocate fs/xfs/libxfs/xfs_bmap.c:4269 [inline] xfs_bmapi_write+0xa49/0x1d00 fs/xfs/libxfs/xfs_bmap.c:4592 xfs_iomap_write_allocate+0x42b/0xa30 fs/xfs/xfs_iomap.c:780 xfs_map_blocks+0x548/0x940 fs/xfs/xfs_aops.c:422 xfs_writepage_map fs/xfs/xfs_aops.c:964 [inline] xfs_do_writepage+0x422/0x13d0 fs/xfs/xfs_aops.c:1149 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x12f/0x230 fs/sync.c:48 write_cache_pages+0x505/0xd20 mm/page-writeback.c:2257 xfs_vm_writepages+0x258/0x340 fs/xfs/xfs_aops.c:1188 generic_shutdown_super+0x70/0x370 fs/super.c:432 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 do_writepages+0xc3/0x240 mm/page-writeback.c:2361 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 __writeback_single_inode+0xda/0x1010 fs/fs-writeback.c:1382 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 task_work_run+0x11f/0x190 kernel/task_work.c:113 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 XFS (loop1): page discard on page ffffea0001094dc0, inode 0x29, offset 1941504. entry_SYSCALL_64_after_hwframe+0x5e/0xd3 XFS (loop1): Internal error XFS_WANT_CORRUPTED_RETURN at line 431 of file fs/xfs/libxfs/xfs_alloc.c. Caller xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 RIP: 0033:0x7fc213c7f537 CPU: 1 PID: 2818 Comm: kworker/u4:3 Not tainted 4.14.303-syzkaller #0 RSP: 002b:00007ffedf7eca68 EFLAGS: 00000246 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: writeback wb_workfn (flush-7:1) Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 xfs_error_report fs/xfs/xfs_error.c:320 [inline] xfs_error_report+0x98/0xa0 fs/xfs/xfs_error.c:307 xfs_alloc_fixup_trees+0x425/0x4f0 fs/xfs/libxfs/xfs_alloc.c:446 xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc213c7f537 RDX: 00007ffedf7ecb3a RSI: 000000000000000a RDI: 00007ffedf7ecb30 xfs_alloc_ag_vextent+0x579/0x750 fs/xfs/libxfs/xfs_alloc.c:702 RBP: 00007ffedf7ecb30 R08: 00000000ffffffff R09: 00007ffedf7ec900 R10: 0000555555e19903 R11: 0000000000000246 R12: 00007fc213cd8b24 xfs_alloc_vextent+0x10b0/0x2010 fs/xfs/libxfs/xfs_alloc.c:2835 xfs_bmap_btalloc+0x9e5/0x1b20 fs/xfs/libxfs/xfs_bmap.c:3733 xfs_bmap_alloc+0x107/0x160 fs/xfs/libxfs/xfs_bmap.c:3823 xfs_bmapi_allocate fs/xfs/libxfs/xfs_bmap.c:4269 [inline] xfs_bmapi_write+0xa49/0x1d00 fs/xfs/libxfs/xfs_bmap.c:4592 R13: 00007ffedf7edbf0 R14: 0000555555e19810 R15: 00007ffedf7edc30 Showing all locks held in the system: 1 lock held by khungtaskd/1532: xfs_iomap_write_allocate+0x42b/0xa30 fs/xfs/xfs_iomap.c:780 #0: ( xfs_map_blocks+0x548/0x940 fs/xfs/xfs_aops.c:422 tasklist_lock ){.+.+} , at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 xfs_writepage_map fs/xfs/xfs_aops.c:964 [inline] xfs_do_writepage+0x422/0x13d0 fs/xfs/xfs_aops.c:1149 write_cache_pages+0x505/0xd20 mm/page-writeback.c:2257 2 locks held by syz-executor.1/7996: xfs_vm_writepages+0x258/0x340 fs/xfs/xfs_aops.c:1188 #0: do_writepages+0xc3/0x240 mm/page-writeback.c:2361 ( __writeback_single_inode+0xda/0x1010 fs/fs-writeback.c:1382 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 &type->s_umount_key wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 #56 ){+.+.} , at: [] deactivate_super+0x77/0xa0 fs/super.c:349 #1: ( process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 &bdi->wb_switch_rwsem worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 ){+.+.} kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 XFS (loop1): page discard on page ffffea0001094e00, inode 0x29, offset 1945600. , at: [] bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] , at: [] sync_inodes_sb+0x156/0x880 fs/fs-writeback.c:2445 XFS (loop1): Internal error XFS_WANT_CORRUPTED_RETURN at line 431 of file fs/xfs/libxfs/xfs_alloc.c. Caller xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 CPU: 1 PID: 2818 Comm: kworker/u4:3 Not tainted 4.14.303-syzkaller #0 ============================================= Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 NMI backtrace for cpu 0 Workqueue: writeback wb_workfn (flush-7:1) Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 xfs_error_report fs/xfs/xfs_error.c:320 [inline] xfs_error_report+0x98/0xa0 fs/xfs/xfs_error.c:307 xfs_alloc_fixup_trees+0x425/0x4f0 fs/xfs/libxfs/xfs_alloc.c:446 xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 xfs_alloc_ag_vextent+0x579/0x750 fs/xfs/libxfs/xfs_alloc.c:702 xfs_alloc_vextent+0x10b0/0x2010 fs/xfs/libxfs/xfs_alloc.c:2835 xfs_bmap_btalloc+0x9e5/0x1b20 fs/xfs/libxfs/xfs_bmap.c:3733 xfs_bmap_alloc+0x107/0x160 fs/xfs/libxfs/xfs_bmap.c:3823 xfs_bmapi_allocate fs/xfs/libxfs/xfs_bmap.c:4269 [inline] xfs_bmapi_write+0xa49/0x1d00 fs/xfs/libxfs/xfs_bmap.c:4592 xfs_iomap_write_allocate+0x42b/0xa30 fs/xfs/xfs_iomap.c:780 xfs_map_blocks+0x548/0x940 fs/xfs/xfs_aops.c:422 xfs_writepage_map fs/xfs/xfs_aops.c:964 [inline] xfs_do_writepage+0x422/0x13d0 fs/xfs/xfs_aops.c:1149 write_cache_pages+0x505/0xd20 mm/page-writeback.c:2257 xfs_vm_writepages+0x258/0x340 fs/xfs/xfs_aops.c:1188 do_writepages+0xc3/0x240 mm/page-writeback.c:2361 __writeback_single_inode+0xda/0x1010 fs/fs-writeback.c:1382 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.303-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 XFS (loop1): page discard on page ffffea0001094e40, inode 0x29, offset 1949696. kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 0 to CPUs 1: XFS (loop1): Internal error XFS_WANT_CORRUPTED_RETURN at line 431 of file fs/xfs/libxfs/xfs_alloc.c. Caller xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 NMI backtrace for cpu 1 CPU: 1 PID: 2818 Comm: kworker/u4:3 Not tainted 4.14.303-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: writeback wb_workfn (flush-7:1) task: ffff8880ae6ba4c0 task.stack: ffff8880ae6c0000 RIP: 0010:univ8250_console_write+0x2/0x70 drivers/tty/serial/8250/8250_core.c:593 RSP: 0018:ffff8880ae6c67f8 EFLAGS: 00000097 RAX: ffff8880ae6ba4c0 RBX: ffffffff894879e0 RCX: 00000000000002df RDX: 0000000000000033 RSI: ffffffff8be8f920 RDI: ffffffff894879e0 RBP: 0000000000000000 R08: ffffffff8b9a61f8 R09: 00000000000c0008 R10: ffff8880ae6bae10 R11: ffff8880ae6ba4c0 R12: ffffffff835b71c0 R13: ffffffff894879f0 R14: dffffc0000000000 R15: 0000000000000033 FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb1c96ca010 CR3: 00000000a183d000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_console_drivers kernel/printk/printk.c:1727 [inline] console_unlock+0x99d/0xf20 kernel/printk/printk.c:2409 vprintk_emit+0x224/0x620 kernel/printk/printk.c:1925 vprintk_func+0x58/0x160 kernel/printk/printk_safe.c:409 printk+0x9e/0xbc kernel/printk/printk.c:1998 __xfs_printk+0x66/0x8a fs/xfs/xfs_message.c:36 xfs_alert_tag+0x12a/0x166 fs/xfs/xfs_message.c:94 xfs_error_report fs/xfs/xfs_error.c:316 [inline] xfs_error_report+0x93/0xa0 fs/xfs/xfs_error.c:307 xfs_alloc_fixup_trees+0x425/0x4f0 fs/xfs/libxfs/xfs_alloc.c:446 xfs_alloc_ag_vextent_near+0x17b2/0x2fb0 fs/xfs/libxfs/xfs_alloc.c:1333 xfs_alloc_ag_vextent+0x579/0x750 fs/xfs/libxfs/xfs_alloc.c:702 xfs_alloc_vextent+0x10b0/0x2010 fs/xfs/libxfs/xfs_alloc.c:2835 xfs_bmap_btalloc+0x9e5/0x1b20 fs/xfs/libxfs/xfs_bmap.c:3733 xfs_bmap_alloc+0x107/0x160 fs/xfs/libxfs/xfs_bmap.c:3823 xfs_bmapi_allocate fs/xfs/libxfs/xfs_bmap.c:4269 [inline] xfs_bmapi_write+0xa49/0x1d00 fs/xfs/libxfs/xfs_bmap.c:4592 xfs_iomap_write_allocate+0x42b/0xa30 fs/xfs/xfs_iomap.c:780 xfs_map_blocks+0x548/0x940 fs/xfs/xfs_aops.c:422 xfs_writepage_map fs/xfs/xfs_aops.c:964 [inline] xfs_do_writepage+0x422/0x13d0 fs/xfs/xfs_aops.c:1149 write_cache_pages+0x505/0xd20 mm/page-writeback.c:2257 xfs_vm_writepages+0x258/0x340 fs/xfs/xfs_aops.c:1188 do_writepages+0xc3/0x240 mm/page-writeback.c:2361 __writeback_single_inode+0xda/0x1010 fs/fs-writeback.c:1382 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Code: 23 fe e9 24 ff ff ff 4c 89 f7 e8 3a a9 23 fe eb ae 4c 89 f7 e8 30 a9 23 fe e9 63 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 41 54 <41> 89 d4 55 48 89 f5 53 48 89 fb e8 1e e4 f9 fd 48 8d 7b 42 48