INFO: task hung in __bread

Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in __bread_gfp exfat			4	2113d	2208d	0/26	auto-closed as invalid on 2019/02/22 10:29
linux-5.15	INFO: task hung in __bread_gfp			3	23h04m	15d	0/3	upstream: reported on 2024/04/05 04:55
android-49	INFO: task hung in __bread_gfp			2	2194d	2208d	0/3	auto-closed as invalid on 2019/02/22 14:34
upstream	INFO: task hung in __bread_gfp (2) jfs			5	1430d	1436d	0/26	auto-closed as invalid on 2020/07/20 01:01
upstream	INFO: task hung in __bread_gfp (4) reiserfs	C	error	3	421d	482d	0/26	auto-obsoleted due to no activity on 2023/07/25 23:59

INFO: task syz-executor.3:6245 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26360 pid: 6245 ppid: 14038 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:4969 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6250 schedule+0x12b/0x1f0 kernel/sched/core.c:6323 io_schedule+0x83/0x100 kernel/sched/core.c:8368 bit_wait_io+0xe/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit+0xbd/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0x1d2/0x250 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:101 [inline] __wait_on_buffer fs/buffer.c:122 [inline] wait_on_buffer include/linux/buffer_head.h:356 [inline] __bread_slow fs/buffer.c:1181 [inline] __bread_gfp+0x296/0x360 fs/buffer.c:1382 sb_bread include/linux/buffer_head.h:303 [inline] efs_fill_super+0x165/0x1440 fs/efs/super.c:272 mount_bdev+0x26c/0x3a0 fs/super.c:1368 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x86/0x270 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1986/0x2c30 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x308/0x3c0 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fc4b80a0ae9 RSP: 002b:00007fc4b5616188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc4b81b3f60 RCX: 00007fc4b80a0ae9 RDX: 00000000200006c0 RSI: 0000000020000680 RDI: 0000000020000640 RBP: 00007fc4b80faf25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb59f7e9f R14: 00007fc4b5616300 R15: 0000000000022000 </TASK> INFO: task syz-executor.3:6260 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27088 pid: 6260 ppid: 14038 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:4969 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6250 schedule+0x12b/0x1f0 kernel/sched/core.c:6323 blk_mq_freeze_queue_wait+0x105/0x190 block/blk-mq.c:178 nbd_add_socket+0x17b/0x8e0 drivers/block/nbd.c:1107 __nbd_ioctl drivers/block/nbd.c:1464 [inline] nbd_ioctl+0x263/0xb80 drivers/block/nbd.c:1521 blkdev_ioctl+0x3ac/0x790 block/ioctl.c:597 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fc4b80a0ae9 RSP: 002b:00007fc4b55d4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc4b81b40e0 RCX: 00007fc4b80a0ae9 RDX: 0000000000000006 RSI: 000000000000ab00 RDI: 0000000000000005 RBP: 00007fc4b80faf25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb59f7e9f R14: 00007fc4b55d4300 R15: 0000000000022000 </TASK> INFO: task syz-executor.3:6265 blocked for more than 144 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:25616 pid: 6265 ppid: 14038 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:4969 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6250 schedule+0x12b/0x1f0 kernel/sched/core.c:6323 rwsem_down_write_slowpath+0xd47/0x1440 kernel/locking/rwsem.c:1117 __down_write_common kernel/locking/rwsem.c:1272 [inline] __down_write kernel/locking/rwsem.c:1281 [inline] down_write+0x163/0x170 kernel/locking/rwsem.c:1528 grab_super+0x58/0x190 fs/super.c:389 sget+0x1bd/0x4f0 fs/super.c:606 mount_bdev+0xe8/0x3a0 fs/super.c:1341 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x86/0x270 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1986/0x2c30 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x308/0x3c0 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fc4b80a0ae9 RSP: 002b:00007fc4b55b3188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc4b81b41a0 RCX: 00007fc4b80a0ae9 RDX: 00000000200006c0 RSI: 0000000020000680 RDI: 0000000020000640 RBP: 00007fc4b80faf25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb59f7e9f R14: 00007fc4b55b3300 R15: 0000000000022000 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1d8c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by in:imklog/6144: 2 locks held by kworker/u4:0/16471: 1 lock held by syz-executor.3/6245: #0: ffff888034c4a0e0 (&type->s_umount_key#100/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x860 fs/super.c:229 1 lock held by syz-executor.3/6260: #0: ffff88801afea198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x148/0xb80 drivers/block/nbd.c:1514 2 locks held by syz-executor.3/6265: #0: ffff888146191dd8 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: mount_bdev+0x88/0x3a0 fs/super.c:1335 #1: ffff888034c4a0e0 (&type->s_umount_key#101){+.+.}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:389 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc82/0xcd0 kernel/hung_task.c:295 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 </TASK> Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16471 Comm: kworker/u4:0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_release kernel/locking/lockdep.c:5288 [inline] RIP: 0010:lock_release+0x194/0x810 kernel/locking/lockdep.c:5645 Code: 00 48 c7 c0 14 43 fd 8d 48 c1 e8 03 42 8a 04 20 84 c0 0f 85 fb 04 00 00 83 3d ab 62 97 0c 00 0f 84 83 03 00 00 48 8b 44 24 10 <48> 8d b8 58 0a 00 00 48 89 fe 48 c1 ee 03 42 8a 04 26 84 c0 0f 85 RSP: 0000:ffffc90004207a00 EFLAGS: 00000002 RAX: ffff88801a298000 RBX: 1ffff92000840f56 RCX: ffffc90004207a03 RDX: 1ffff92000840f50 RSI: 0000000000000201 RDI: 0000000000000000 RBP: ffffc90004207b38 R08: dffffc0000000000 R09: fffffbfff1bfa1ee R10: fffffbfff1bfa1ee R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff92000840f4c R14: ffffffff89de2d1f R15: 0000000000000246 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd1114456b5 CR3: 000000000c88e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:165 [inline] _raw_spin_unlock_bh+0x17/0x30 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:395 [inline] batadv_nc_purge_paths+0x35f/0x3f0 net/batman-adv/network-coding.c:475 batadv_nc_worker+0x31e/0x5b0 net/batman-adv/network-coding.c:726 process_one_work+0x853/0x1140 kernel/workqueue.c:2298 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 </TASK> ---------------- Code disassembly (best guess): 0: 00 48 c7 add %cl,-0x39(%rax) 3: c0 14 43 fd rclb $0xfd,(%rbx,%rax,2) 7: 8d 48 c1 lea -0x3f(%rax),%ecx a: e8 03 42 8a 04 callq 0x48a4212 f: 20 84 c0 0f 85 fb 04 and %al,0x4fb850f(%rax,%rax,8) 16: 00 00 add %al,(%rax) 18: 83 3d ab 62 97 0c 00 cmpl $0x0,0xc9762ab(%rip) # 0xc9762ca 1f: 0f 84 83 03 00 00 je 0x3a8 25: 48 8b 44 24 10 mov 0x10(%rsp),%rax * 2a: 48 8d b8 58 0a 00 00 lea 0xa58(%rax),%rdi <-- trapping instruction 31: 48 89 fe mov %rdi,%rsi 34: 48 c1 ee 03 shr $0x3,%rsi 38: 42 8a 04 26 mov (%rsi,%r12,1),%al 3c: 84 c0 test %al,%al 3e: 0f .byte 0xf 3f: 85 .byte 0x85