INFO: task syz-executor.1:6742 blocked for more than 143 seconds. Not tainted 5.15.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29616 pid: 6742 ppid: 6552 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107 __down_write_common kernel/locking/rwsem.c:1262 [inline] __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1271 [inline] down_write_nested+0x13b/0x150 kernel/locking/rwsem.c:1628 inode_lock_nested include/linux/fs.h:821 [inline] do_unlinkat+0x269/0x650 fs/namei.c:4152 __do_sys_unlink fs/namei.c:4217 [inline] __se_sys_unlink fs/namei.c:4215 [inline] __x64_sys_unlink+0xc6/0x110 fs/namei.c:4215 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: 0033:0x7fd0d13bd8d9 RSP: 002b:00007fd0ce8f2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007fd0d14c20e0 RCX: 00007fd0d13bd8d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007fd0d1417cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfc3f7b4f R14: 00007fd0ce8f2300 R15: 0000000000022000 INFO: task syz-executor.1:6773 blocked for more than 143 seconds. Not tainted 5.15.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29368 pid: 6773 ppid: 6552 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107 __down_write_common kernel/locking/rwsem.c:1262 [inline] __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1271 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1518 inode_lock include/linux/fs.h:786 [inline] open_last_lookups fs/namei.c:3349 [inline] path_openat+0x941/0x2740 fs/namei.c:3558 do_filp_open+0x1aa/0x400 fs/namei.c:3588 do_sys_openat2+0x16d/0x4d0 fs/open.c:1200 do_sys_open fs/open.c:1216 [inline] __do_sys_creat fs/open.c:1290 [inline] __se_sys_creat fs/open.c:1284 [inline] __x64_sys_creat+0xc9/0x120 fs/open.c:1284 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: 0033:0x7fd0d13bd8d9 RSP: 002b:00007fd0ce8b0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fd0d14c2260 RCX: 00007fd0d13bd8d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007fd0d1417cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfc3f7b4f R14: 00007fd0ce8b0300 R15: 0000000000022000 INFO: task syz-executor.1:6777 blocked for more than 143 seconds. Not tainted 5.15.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29616 pid: 6777 ppid: 6552 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107 __down_write_common kernel/locking/rwsem.c:1262 [inline] __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1271 [inline] down_write_nested+0x13b/0x150 kernel/locking/rwsem.c:1628 inode_lock_nested include/linux/fs.h:821 [inline] do_unlinkat+0x269/0x650 fs/namei.c:4152 __do_sys_unlink fs/namei.c:4217 [inline] __se_sys_unlink fs/namei.c:4215 [inline] __x64_sys_unlink+0xc6/0x110 fs/namei.c:4215 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: 0033:0x7fd0d13bd8d9 RSP: 002b:00007fd0ce86e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007fd0d14c23e0 RCX: 00007fd0d13bd8d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007fd0d1417cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfc3f7b4f R14: 00007fd0ce86e300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b97fde0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6226: #0: ffff888073cdad70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 1 lock held by syz-executor.1/6737: 2 locks held by syz-executor.1/6742: #0: ffff8880782f8460 (sb_writers#17){.+.+}-{0:0}, at: do_unlinkat+0x17f/0x650 fs/namei.c:4148 #1: ffff88806c7fdc20 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:821 [inline] #1: ffff88806c7fdc20 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: do_unlinkat+0x269/0x650 fs/namei.c:4152 1 lock held by syz-executor.1/6772: #0: ffff88806c7fdc20 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:796 [inline] #0: ffff88806c7fdc20 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline] #0: ffff88806c7fdc20 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x400/0x6a0 fs/namei.c:1970 2 locks held by syz-executor.1/6773: #0: ffff8880782f8460 (sb_writers#17){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3341 [inline] #0: ffff8880782f8460 (sb_writers#17){.+.+}-{0:0}, at: path_openat+0x25c9/0x2740 fs/namei.c:3558 #1: ffff88806c7fdc20 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:786 [inline] #1: ffff88806c7fdc20 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3349 [inline] #1: ffff88806c7fdc20 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x941/0x2740 fs/namei.c:3558 2 locks held by syz-executor.1/6777: #0: ffff8880782f8460 (sb_writers#17){.+.+}-{0:0}, at: do_unlinkat+0x17f/0x650 fs/namei.c:4148 #1: ffff88806c7fdc20 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:821 [inline] #1: ffff88806c7fdc20 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: do_unlinkat+0x269/0x650 fs/namei.c:4152 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc3-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:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 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: 6737 Comm: syz-executor.1 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_hardirqs_off+0x4/0x1b0 kernel/trace/trace_preemptirq.c:76 Code: 0f 0b e9 25 fe ff ff e8 aa db f9 ff 0f 0b e9 d0 fe ff ff e8 be 2b 41 00 e9 3e ff ff ff 66 0f 1f 84 00 00 00 00 00 41 54 55 53 87 db f9 ff 48 8b 7c 24 18 e8 ed 09 b9 07 65 8b 1d e6 92 86 7e RSP: 0018:ffffc90002fff200 EFLAGS: 00000046 RAX: 0000000000040000 RBX: 0000000000000200 RCX: ffffc9000ad0b000 RDX: 0000000000040000 RSI: ffffffff81d930e7 RDI: 0000000000000003 RBP: ffff8880110ec090 R08: 0000000000000000 R09: 0000000002778900 R10: ffffffff81d92d61 R11: 0000000000000000 R12: 00000000ae0f5bdf R13: ffff8880110ebac0 R14: 0000000000000400 R15: ffff8880110ebac0 FS: 00007fd0ce913700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005634d7b48160 CR3: 000000003804b000 CR4: 0000000000350ee0 Call Trace: lookup_bh_lru fs/buffer.c:1273 [inline] __find_get_block+0x3dc/0xdb0 fs/buffer.c:1304 __getblk_slow+0x143/0xb70 fs/buffer.c:1037 __getblk_gfp fs/buffer.c:1334 [inline] __bread_gfp+0x275/0x3c0 fs/buffer.c:1379 sb_bread include/linux/buffer_head.h:303 [inline] get_branch fs/minix/itree_common.c:46 [inline] get_block+0x293/0x1450 fs/minix/itree_common.c:166 minix_get_block+0xbb/0x110 fs/minix/inode.c:397 block_read_full_page+0x28d/0xdf0 fs/buffer.c:2288 do_read_cache_page+0x8e8/0x13c0 mm/filemap.c:3458 read_mapping_page include/linux/pagemap.h:515 [inline] dir_get_page fs/minix/dir.c:70 [inline] minix_find_entry+0x203/0x7e0 fs/minix/dir.c:170 minix_inode_by_name+0x6d/0x460 fs/minix/dir.c:454 minix_lookup fs/minix/namei.c:30 [inline] minix_lookup+0x103/0x190 fs/minix/namei.c:22 __lookup_slow+0x24c/0x480 fs/namei.c:1657 lookup_slow fs/namei.c:1674 [inline] walk_component+0x40f/0x6a0 fs/namei.c:1970 link_path_walk.part.0+0x757/0xd00 fs/namei.c:2297 link_path_walk fs/namei.c:2222 [inline] path_parentat+0xb1/0x1c0 fs/namei.c:2496 filename_parentat+0x1bb/0x5a0 fs/namei.c:2519 do_renameat2+0x1bf/0xc80 fs/namei.c:4697 __do_sys_renameat fs/namei.c:4819 [inline] __se_sys_renameat fs/namei.c:4816 [inline] __x64_sys_renameat+0xbf/0xf0 fs/namei.c:4816 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: 0033:0x7fd0d13bd8d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd0ce913188 EFLAGS: 00000246 ORIG_RAX: 0000000000000108 RAX: ffffffffffffffda RBX: 00007fd0d14c2020 RCX: 00007fd0d13bd8d9 RDX: 0000000000000005 RSI: 00000000200000c0 RDI: ffffffffffffff9c RBP: 00007fd0d1417cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfc3f7b4f R14: 00007fd0ce913300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 0f 0b ud2 2: e9 25 fe ff ff jmpq 0xfffffe2c 7: e8 aa db f9 ff callq 0xfff9dbb6 c: 0f 0b ud2 e: e9 d0 fe ff ff jmpq 0xfffffee3 13: e8 be 2b 41 00 callq 0x412bd6 18: e9 3e ff ff ff jmpq 0xffffff5b 1d: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 24: 00 00 26: 41 54 push %r12 28: 55 push %rbp 29: 53 push %rbx * 2a: e8 87 db f9 ff callq 0xfff9dbb6 <-- trapping instruction 2f: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi 34: e8 ed 09 b9 07 callq 0x7b90a26 39: 65 8b 1d e6 92 86 7e mov %gs:0x7e8692e6(%rip),%ebx # 0x7e869326