IPVS: ftp: loaded support on port[0] = 21 INFO: task rs:main Q:Reg:7814 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. rs:main Q:Reg D26120 7814 1 0x00000000 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 __writeback_inodes_sb_nr+0x1df/0x270 fs/fs-writeback.c:2373 try_to_writeback_inodes_sb+0xda/0x110 fs/fs-writeback.c:2421 ext4_nonda_switch+0x1aa/0x1f0 fs/ext4/inode.c:3007 ext4_da_write_begin+0x155/0x10e0 fs/ext4/inode.c:3048 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 ext4_file_write_iter+0x2fe/0xf20 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f79836cc1cd Code: Bad RIP value. RSP: 002b:00007f7980c87590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f7978021e40 RCX: 00007f79836cc1cd RDX: 000000000000005b RSI: 00007f7978021e40 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f7978021bc0 R13: 00007f7980c875b0 R14: 000055cc63d1b360 R15: 000000000000005b Showing all locks held in the system: 3 locks held by kworker/u4:2/42: 2 locks held by kworker/u4:4/912: #0: 00000000dd022ea3 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000dd022ea3 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 00000000b70e390a (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 00000000b70e390a (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 1 lock held by khungtaskd/1571: #0: 00000000b70e390a (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7813: #0: 000000009f79266b (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 4 locks held by rs:main Q:Reg/7814: #0: 000000001f15ce4c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 00000000bcbdc360 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #1: 00000000bcbdc360 (sb_writers#3){.+.+}, at: vfs_write+0x463/0x540 fs/read_write.c:548 #2: 00000000a151ac79 (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_trylock include/linux/fs.h:768 [inline] #2: 00000000a151ac79 (&sb->s_type->i_mutex_key#10){+.+.}, at: ext4_file_write_iter+0x21f/0xf20 fs/ext4/file.c:238 #3: 00000000e99465ff (&type->s_umount_key#36){++++}, at: try_to_writeback_inodes_sb+0x1d/0x110 fs/fs-writeback.c:2418 3 locks held by kworker/u4:7/28575: #0: 000000002c86999e ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000fb2be283 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/29447: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/29684: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/29817: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/30004: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/30019: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/30861: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/31256: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/31336: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/31408: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/31460: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/31488: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/31572: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/31644: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/31687: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/31692: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/31697: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/31793: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/32116: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/32141: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/32158: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/32165: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/32421: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/32513: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/32532: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/32590: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/344: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/470: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/477: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/483: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/487: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/514: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/786: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/880: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/923: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/945: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/973: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/1000: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/1125: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/1177: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/1180: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/1181: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/1182: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/1183: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/1287: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/1321: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/1332: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/1333: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/1334: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/1336: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/1425: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/1743: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/1788: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/1796: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/1916: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/1921: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/1932: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/1940: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/1946: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/1958: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/2259: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/2464: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/2550: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/2581: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/2611: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/2614: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/2634: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/2684: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/2738: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/2768: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/2773: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/2795: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/2820: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/2896: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/2905: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/2916: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/2917: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/3415: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/3416: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/3417: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/3426: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/3441: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/3461: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/3554: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/3557: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/3579: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/3582: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/3613: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/3695: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/3710: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/3717: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/3723: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/3831: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/3849: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/3850: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/4013: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/4038: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/4163: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/4200: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/4204: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/4212: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/4216: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/4218: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/4237: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/4257: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/4552: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/4592: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/4610: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/4617: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/4679: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/4712: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/4719: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/4723: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/4747: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/4772: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/4798: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/4824: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/4829: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/4854: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/4881: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/4907: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/4938: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/4968: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/5015: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/5122: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/5123: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5133: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/5148: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/5268: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/5271: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5272: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/5312: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/5405: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/5417: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5461: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/5543: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/5570: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/5600: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/5606: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/5656: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5699: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/5710: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/5736: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5762: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/5807: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5814: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5870: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/5883: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/5944: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/5986: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/6028: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/6060: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/6070: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/6091: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 2 locks held by kworker/0:1/6092: #0: 00000000b2175af3 ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000001f2985d2 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 1 lock held by syz-executor.4/6118: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/6237: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/6254: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/6329: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/6342: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/6359: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/6379: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/6405: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/6431: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.5/8413: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/8807: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/8852: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/8873: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.3/8934: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.0/8946: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.2/9005: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.4/9026: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 1 lock held by syz-executor.1/9038: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 2 locks held by syz-executor.0/9650: #0: 0000000088f6657b (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:435 #1: 000000001d3bb4c7 (rtnl_mutex){+.+.}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032 2 locks held by syz-executor.1/9808: #0: 0000000088f6657b (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:435 #1: 000000001d3bb4c7 (rtnl_mutex){+.+.}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032 2 locks held by syz-executor.2/9820: #0: 0000000088f6657b (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:435 #1: 000000002683c91c (rcu_preempt_state.barrier_mutex){+.+.}, at: _rcu_barrier+0x59/0x3e0 kernel/rcu/tree.c:3430 4 locks held by syz-executor.4/9833: #0: 0000000088f6657b (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:435 #1: 000000001d3bb4c7 (rtnl_mutex){+.+.}, at: caif_exit_net+0x38/0x450 net/caif/caif_dev.c:522 #2: 00000000bc83ce3b (&caifn->caifdevs.lock){+.+.}, at: caif_exit_net+0x4f/0x450 net/caif/caif_dev.c:523 #3: 0000000063db7269 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #3: 0000000063db7269 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 1 lock held by syz-executor.5/10003: #0: 0000000094cf291c (&sbi->s_writepages_rwsem){.+.+}, at: do_writepages+0xe5/0x290 mm/page-writeback.c:2344 ============================================= 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: 19420 Comm: kworker/u4:5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:lock_release+0x76/0x8b0 kernel/locking/lockdep.c:3920 Code: df 01 00 48 8d bb 84 08 00 00 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 48 89 fa 65 48 8b 34 25 28 00 00 00 48 89 74 24 70 31 f6 <48> c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 RSP: 0018:ffff88808ce0fc00 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8880b0bf4500 RCX: ffffffff87d8f371 RDX: ffff8880b0bf4d84 RSI: 0000000000000000 RDI: ffff8880b0bf4d84 RBP: ffffffff89f85fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff110119c1f83 R13: ffffffff87d8f075 R14: 000000000000026c R15: ffff8880a4bdf800 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a64dc8000 CR3: 00000000a1339000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline] batadv_nc_worker+0x66c/0xd50 net/batman-adv/network-coding.c:730 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