INFO: task syz-executor.3:676 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.3 D24472 676 8173 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 xlog_grant_head_wait+0x13b/0xcd0 fs/xfs/xfs_log.c:263 xlog_grant_head_check+0x3c8/0x420 fs/xfs/xfs_log.c:325 xfs_log_reserve+0x347/0xa70 fs/xfs/xfs_log.c:454 xfs_trans_reserve+0x63a/0x9c0 fs/xfs/xfs_trans.c:197 xfs_trans_alloc+0x2f7/0x700 fs/xfs/xfs_trans.c:289 xfs_attr_set+0x5b8/0x740 fs/xfs/libxfs/xfs_attr.c:363 xfs_xattr_set+0xb5/0x120 fs/xfs/xfs_xattr.c:81 __vfs_setxattr+0x10e/0x170 fs/xattr.c:149 __vfs_setxattr_noperm+0x11a/0x420 fs/xattr.c:180 __vfs_setxattr_locked+0x176/0x250 fs/xattr.c:238 vfs_setxattr+0xe5/0x270 fs/xattr.c:255 setxattr+0x23d/0x330 fs/xattr.c:520 XFS (loop4): Mounting V4 Filesystem __do_sys_fsetxattr fs/xattr.c:575 [inline] __se_sys_fsetxattr+0x14d/0x1b0 fs/xattr.c:564 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb56ddb90f9 Code: Bad RIP value. XFS (loop4): totally zeroed log RSP: 002b:00007fb56c32b168 EFLAGS: 00000246 ORIG_RAX: 00000000000000be XFS (loop4): Internal error xlog_valid_rec_header(2) at line 5282 of file fs/xfs/xfs_log_recover.c. Caller xlog_do_recovery_pass+0x59e/0xd10 fs/xfs/xfs_log_recover.c:5348 RAX: ffffffffffffffda RBX: 00007fb56ded8f80 RCX: 00007fb56ddb90f9 CPU: 0 PID: 5883 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 RDX: 0000000020000300 RSI: 0000000020000000 RDI: 0000000000000005 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 xfs_error_report fs/xfs/xfs_error.c:319 [inline] xfs_error_report+0xb0/0xc0 fs/xfs/xfs_error.c:306 RBP: 00007fb56de14ae9 R08: 0000000000000000 R09: 0000000000000000 xlog_valid_rec_header+0x29f/0x320 fs/xfs/xfs_log_recover.c:5282 R10: 000000000000fe4d R11: 0000000000000246 R12: 0000000000000000 xlog_do_recovery_pass+0x59e/0xd10 fs/xfs/xfs_log_recover.c:5348 R13: 00007ffc706e320f R14: 00007fb56c32b300 R15: 0000000000022000 Showing all locks held in the system: xlog_verify_head+0x174/0x570 fs/xfs/xfs_log_recover.c:1188 1 lock held by khungtaskd/1570: #0: 0000000053f62c5c (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7820: xlog_find_tail+0x50a/0x890 fs/xfs/xfs_log_recover.c:1463 3 locks held by syz-executor.3/676: #0: 0000000098a0c7a1 (sb_writers#22){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000098a0c7a1 (sb_writers#22){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 0000000071b17113 (&sb->s_type->i_mutex_key#28){++++}, at: inode_lock include/linux/fs.h:748 [inline] #1: 0000000071b17113 (&sb->s_type->i_mutex_key#28){++++}, at: vfs_setxattr+0xc7/0x270 fs/xattr.c:254 #2: 0000000012ff5060 (sb_internal#4){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #2: 0000000012ff5060 (sb_internal#4){.+.+}, at: xfs_trans_alloc+0x4fc/0x700 fs/xfs/xfs_trans.c:271 xlog_recover+0x79/0x500 fs/xfs/xfs_log_recover.c:5744 2 locks held by kworker/1:3/1110: xfs_log_mount+0x407/0x770 fs/xfs/xfs_log.c:694 #0: 00000000e8db2bc0 ((wq_completion)"xfs-sync/%s"mp->m_fsname){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 xfs_mountfs+0xd7a/0x1bf0 fs/xfs/xfs_mount.c:880 #1: 0000000087557a19 ((work_completion)(&(&log->l_work)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 4 locks held by syz-executor.4/5883: xfs_fs_fill_super+0xd0e/0x1540 fs/xfs/xfs_super.c:1720 1 lock held by syz-executor.5/5891: mount_bdev+0x2fc/0x3b0 fs/super.c:1158 #0: 0000000065eb176c (loop_ctl_mutex){+.+.}, at: loop_set_fd drivers/block/loop.c:956 [inline] #0: 0000000065eb176c (loop_ctl_mutex){+.+.}, at: lo_ioctl+0x1bb/0x20e0 drivers/block/loop.c:1576 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: 0033:0x7efde0ba062a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efddf110f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000bb2b RCX: 00007efde0ba062a RDX: 000000002000bb00 RSI: 000000002000bb40 RDI: 00007efddf110fe0 RBP: 00007efddf111020 R08: 00007efddf111020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000002000bb00 R13: 000000002000bb40 R14: 00007efddf110fe0 R15: 00000000200005c0 XFS (loop4): Torn write (CRC failure) detected at log block 0xb38. Truncating head block from 0x0. ============================================= XFS (loop5): Mounting V4 Filesystem NMI backtrace for cpu 1 XFS (loop4): Internal error xlog_valid_rec_header(2) at line 5282 of file fs/xfs/xfs_log_recover.c. Caller xlog_do_recovery_pass+0xa81/0xd10 fs/xfs/xfs_log_recover.c:5537 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8737 Comm: kworker/u4:5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline] RIP: 0010:do_raw_spin_unlock+0xe3/0x230 kernel/locking/spinlock_debug.c:134 Code: 65 08 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e fc 00 00 00 65 8b 05 5d 9f b5 7e <39> 45 08 0f 85 b5 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea RSP: 0018:ffff888094d27c10 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88809da4dec0 RCX: ffffffff814be140 RDX: 1ffff11013b49bd9 RSI: 0000000000000004 RDI: ffff88809da4dec0 RBP: ffff88809da4dec0 R08: 0000000000000000 R09: ffffed1013b49bd8 R10: ffff88809da4dec3 R11: 0000000000000000 R12: ffff88809da4dec8 R13: ffff88809da4ded0 R14: 0000000000000078 R15: ffff8880aa140e00 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5882408000 CR3: 000000009c1fa000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:175 [inline] _raw_spin_unlock_bh+0x1f/0x30 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] batadv_nc_purge_paths+0x22d/0x310 net/batman-adv/network-coding.c:482 batadv_nc_worker+0x6fa/0xd50 net/batman-adv/network-coding.c:731 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