INFO: task syz-executor.3:18627 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:24920 pid:18627 ppid: 6532 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6268 schedule+0xd2/0x260 kernel/sched/core.c:6341 __bio_queue_enter+0x3c5/0x6a0 block/blk-core.c:441 bio_queue_enter block/blk.h:91 [inline] blk_mq_get_request block/blk-mq.c:2588 [inline] blk_mq_submit_bio+0x4ae/0x22c0 block/blk-mq.c:2632 __submit_bio block/blk-core.c:849 [inline] __submit_bio_noacct_mq block/blk-core.c:924 [inline] submit_bio_noacct block/blk-core.c:950 [inline] submit_bio_noacct+0x82c/0xa20 block/blk-core.c:939 submit_bio block/blk-core.c:1011 [inline] submit_bio+0x1ea/0x430 block/blk-core.c:969 submit_bh_wbc+0x5e8/0x7e0 fs/buffer.c:3091 __block_write_full_page+0x875/0x1350 fs/buffer.c:1846 block_write_full_page+0x14d/0x190 fs/buffer.c:3017 __writepage+0x60/0x180 mm/page-writeback.c:2320 write_cache_pages+0x6f4/0x10c0 mm/page-writeback.c:2255 generic_writepages mm/page-writeback.c:2346 [inline] generic_writepages+0xe2/0x150 mm/page-writeback.c:2335 do_writepages+0x1ab/0x690 mm/page-writeback.c:2364 filemap_fdatawrite_wbc mm/filemap.c:407 [inline] filemap_fdatawrite_wbc+0x143/0x1b0 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:440 [inline] file_write_and_wait_range+0x163/0x1e0 mm/filemap.c:824 blkdev_fsync+0x4a/0xa0 block/fops.c:465 vfs_fsync_range+0x13a/0x220 fs/sync.c:182 generic_write_sync include/linux/fs.h:2955 [inline] blkdev_write_iter+0x552/0x690 block/fops.c:559 call_write_iter include/linux/fs.h:2162 [inline] do_iter_readv_writev+0x472/0x750 fs/read_write.c:725 do_iter_write+0x188/0x710 fs/read_write.c:851 vfs_iter_write+0x70/0xa0 fs/read_write.c:892 iter_file_splice_write+0x723/0xc70 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x110/0x180 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xaf2/0x1250 fs/read_write.c:1245 __do_sys_sendfile64 fs/read_write.c:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe8b4951ae9 RSP: 002b:00007fe8b1ec7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fe8b4a64f60 RCX: 00007fe8b4951ae9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007fe8b49abf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000024002da6 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffa60383f R14: 00007fe8b1ec7300 R15: 0000000000022000 INFO: task syz-executor.3:18627 blocked for more than 143 seconds. Not tainted 5.16.0-rc1-next-20211118-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24920 pid:18627 ppid: 6532 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6268 schedule+0xd2/0x260 kernel/sched/core.c:6341 __bio_queue_enter+0x3c5/0x6a0 block/blk-core.c:441 bio_queue_enter block/blk.h:91 [inline] blk_mq_get_request block/blk-mq.c:2588 [inline] blk_mq_submit_bio+0x4ae/0x22c0 block/blk-mq.c:2632 __submit_bio block/blk-core.c:849 [inline] __submit_bio_noacct_mq block/blk-core.c:924 [inline] submit_bio_noacct block/blk-core.c:950 [inline] submit_bio_noacct+0x82c/0xa20 block/blk-core.c:939 submit_bio block/blk-core.c:1011 [inline] submit_bio+0x1ea/0x430 block/blk-core.c:969 submit_bh_wbc+0x5e8/0x7e0 fs/buffer.c:3091 __block_write_full_page+0x875/0x1350 fs/buffer.c:1846 block_write_full_page+0x14d/0x190 fs/buffer.c:3017 __writepage+0x60/0x180 mm/page-writeback.c:2320 write_cache_pages+0x6f4/0x10c0 mm/page-writeback.c:2255 generic_writepages mm/page-writeback.c:2346 [inline] generic_writepages+0xe2/0x150 mm/page-writeback.c:2335 do_writepages+0x1ab/0x690 mm/page-writeback.c:2364 filemap_fdatawrite_wbc mm/filemap.c:407 [inline] filemap_fdatawrite_wbc+0x143/0x1b0 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:440 [inline] file_write_and_wait_range+0x163/0x1e0 mm/filemap.c:824 blkdev_fsync+0x4a/0xa0 block/fops.c:465 vfs_fsync_range+0x13a/0x220 fs/sync.c:182 generic_write_sync include/linux/fs.h:2955 [inline] blkdev_write_iter+0x552/0x690 block/fops.c:559 call_write_iter include/linux/fs.h:2162 [inline] do_iter_readv_writev+0x472/0x750 fs/read_write.c:725 do_iter_write+0x188/0x710 fs/read_write.c:851 vfs_iter_write+0x70/0xa0 fs/read_write.c:892 iter_file_splice_write+0x723/0xc70 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x110/0x180 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xaf2/0x1250 fs/read_write.c:1245 __do_sys_sendfile64 fs/read_write.c:1310 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe8b4951ae9 RSP: 002b:00007fe8b1ec7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fe8b4a64f60 RCX: 00007fe8b4951ae9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007fe8b49abf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000024002da6 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffa60383f R14: 00007fe8b1ec7300 R15: 0000000000022000 INFO: task syz-executor.3:18629 can't die for more than 144 seconds. task:syz-executor.3 state:D stack:28032 pid:18629 ppid: 6532 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6268 schedule+0xd2/0x260 kernel/sched/core.c:6341 blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178 __loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122 loop_clr_fd drivers/block/loop.c:1237 [inline] lo_ioctl+0x398/0x17c0 drivers/block/loop.c:1562 blkdev_ioctl+0x37a/0x800 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe8b4951ae9 RSP: 002b:00007fe8b1ea6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe8b4a65020 RCX: 00007fe8b4951ae9 RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004 RBP: 00007fe8b49abf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffa60383f R14: 00007fe8b1ea6300 R15: 0000000000022000 INFO: task syz-executor.3:18629 blocked for more than 144 seconds. Not tainted 5.16.0-rc1-next-20211118-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28032 pid:18629 ppid: 6532 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6268 schedule+0xd2/0x260 kernel/sched/core.c:6341 blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178 __loop_clr_fd+0x1ae/0x1070 drivers/block/loop.c:1122 loop_clr_fd drivers/block/loop.c:1237 [inline] lo_ioctl+0x398/0x17c0 drivers/block/loop.c:1562 blkdev_ioctl+0x37a/0x800 block/ioctl.c:609 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe8b4951ae9 RSP: 002b:00007fe8b1ea6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe8b4a65020 RCX: 00007fe8b4951ae9 RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004 RBP: 00007fe8b49abf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffa60383f R14: 00007fe8b1ea6300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:1/10: #0: ffff8881425ac138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881425ac138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881425ac138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff8881425ac138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff8881425ac138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff8881425ac138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269 #1: ffffc90000cf7db0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273 #2: ffff88814076a0e0 (&type->s_umount_key#48){.+.+}-{3:3}, at: trylock_super+0x1d/0x100 fs/super.c:418 1 lock held by khungtaskd/27: #0: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 5 locks held by kworker/u4:4/1045: #0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 #1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880 #2: ffff8880739410d8 (key#15){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:359 [inline] #2: ffff8880739410d8 (key#15){+...}-{2:2}, at: batadv_nc_purge_paths+0xdf/0x3a0 net/batman-adv/network-coding.c:446 #3: ffffffff906bb328 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:661 #4: ffff8880119aa6e0 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xab/0x15a0 kernel/sched/core.c:4003 2 locks held by systemd-udevd/2970: #0: ffff888146c00118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819 #1: ffff88801a93bb60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733 1 lock held by in:imklog/6223: #0: ffff88807f589270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 1 lock held by syz-executor.3/18629: #0: ffff88801a93bb60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-next-20211118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline] watchdog+0xcb7/0xed0 kernel/hung_task.c:339 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2967 Comm: systemd-journal Not tainted 5.16.0-rc1-next-20211118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__orc_find+0xa3/0xf0 arch/x86/kernel/unwind_orc.c:60 Code: d0 7c 04 84 d2 75 48 48 63 03 48 01 d8 48 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee 49 c1 fe 02 4b 8d 04 76 48 8d 04 46 <48> 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 83 c4 10 31 c0 5b RSP: 0018:ffffc90001a9f888 EFLAGS: 00000246 RAX: ffffffff8e17afa6 RBX: ffffffff8da576e8 RCX: ffffffff81be563f RDX: 0000000000000000 RSI: ffffffff8e17afa6 RDI: ffffffff8da576e8 RBP: ffffffff8da576ec R08: ffffffff8e17afa6 R09: 0000000000000001 R10: fffff52000353f40 R11: 000000000008808a R12: ffffffff8da576e8 R13: ffffffff8da576e8 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f4b86b8d8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b84118000 CR3: 000000001d17c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:173 [inline] unwind_next_frame+0x32a/0x1ce0 arch/x86/kernel/unwind_orc.c:443 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3234 [inline] slab_alloc mm/slub.c:3242 [inline] kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags include/linux/audit.h:323 [inline] getname+0x8e/0xd0 fs/namei.c:217 do_sys_openat2+0xf5/0x4d0 fs/open.c:1206 do_sys_open fs/open.c:1228 [inline] __do_sys_open fs/open.c:1236 [inline] __se_sys_open fs/open.c:1232 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1232 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4b8611c840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffeab57b2a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffeab57b5b0 RCX: 00007f4b8611c840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055a04d7d3fc0 RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055a04d7c6040 R14: 00007ffeab57b570 R15: 000055a04d7d3de0 ---------------- Code disassembly (best guess): 0: d0 7c 04 84 sarb -0x7c(%rsp,%rax,1) 4: d2 75 48 shlb %cl,0x48(%rbp) 7: 48 63 03 movslq (%rbx),%rax a: 48 01 d8 add %rbx,%rax d: 48 39 c1 cmp %rax,%rcx 10: 73 b0 jae 0xffffffc2 12: 4c 8d 63 fc lea -0x4(%rbx),%r12 16: 49 39 ec cmp %rbp,%r12 19: 73 b3 jae 0xffffffce 1b: 4d 29 ee sub %r13,%r14 1e: 49 c1 fe 02 sar $0x2,%r14 22: 4b 8d 04 76 lea (%r14,%r14,2),%rax 26: 48 8d 04 46 lea (%rsi,%rax,2),%rax * 2a: 48 83 c4 10 add $0x10,%rsp <-- trapping instruction 2e: 5b pop %rbx 2f: 5d pop %rbp 30: 41 5c pop %r12 32: 41 5d pop %r13 34: 41 5e pop %r14 36: 41 5f pop %r15 38: c3 retq 39: 48 83 c4 10 add $0x10,%rsp 3d: 31 c0 xor %eax,%eax 3f: 5b pop %rbx