syzbot

INFO: task syz-executor.5:26768 blocked for more than 143 seconds.
      Not tainted 6.5.0-syzkaller-11329-g708283abf896 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:24528 pid:26768 ppid:5078   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1873/0x48f0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 io_schedule+0x8c/0x100 kernel/sched/core.c:9026
 folio_wait_bit_common+0x871/0x12a0 mm/filemap.c:1304
 __filemap_get_folio+0xa3/0xbb0 mm/filemap.c:1885
 iomap_get_folio fs/iomap/buffered-io.c:554 [inline]
 __iomap_get_folio fs/iomap/buffered-io.c:699 [inline]
 iomap_write_begin+0x50e/0x1f00 fs/iomap/buffered-io.c:742
 iomap_write_iter fs/iomap/buffered-io.c:907 [inline]
 iomap_file_buffered_write+0x587/0x1020 fs/iomap/buffered-io.c:968
 blkdev_buffered_write block/fops.c:634 [inline]
 blkdev_write_iter+0x41d/0x5c0 block/fops.c:688
 call_write_iter include/linux/fs.h:1985 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x782/0xaf0 fs/read_write.c:584
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9255a7cae9
RSP: 002b:00007f92567ae0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9255b9c050 RCX: 00007f9255a7cae9
RDX: 000000000156a396 RSI: 0000000020002a40 RDI: 0000000000000006
RBP: 00007f9255ac847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9255b9c050 R15: 00007ffc0f27f328
 </TASK>
INFO: task syz-executor.5:26775 blocked for more than 144 seconds.
      Not tainted 6.5.0-syzkaller-11329-g708283abf896 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:27544 pid:26775 ppid:5078   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1873/0x48f0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 io_schedule+0x8c/0x100 kernel/sched/core.c:9026
 folio_wait_bit_common+0x871/0x12a0 mm/filemap.c:1304
 clean_bdev_aliases+0x2f9/0x770 fs/buffer.c:1725
 clean_bdev_bh_alias include/linux/buffer_head.h:219 [inline]
 __block_write_begin_int+0x771/0x1a40 fs/buffer.c:2115
 iomap_write_begin+0xaf6/0x1f00 fs/iomap/buffered-io.c:772
 iomap_write_iter fs/iomap/buffered-io.c:907 [inline]
 iomap_file_buffered_write+0x587/0x1020 fs/iomap/buffered-io.c:968
 blkdev_buffered_write block/fops.c:634 [inline]
 blkdev_write_iter+0x41d/0x5c0 block/fops.c:688
 call_write_iter include/linux/fs.h:1985 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x782/0xaf0 fs/read_write.c:584
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9255a7cae9
RSP: 002b:00007f925678d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9255b9c120 RCX: 00007f9255a7cae9
RDX: 000000000156a396 RSI: 0000000020002a40 RDI: 0000000000000006
RBP: 00007f9255ac847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9255b9c120 R15: 00007ffc0f27f328
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.5.0-syzkaller-11329-g708283abf896 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xdf5/0xe40 kernel/hung_task.c:379
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5074 Comm: syz-executor.4 Not tainted 6.5.0-syzkaller-11329-g708283abf896 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:preempt_latency_start kernel/sched/core.c:5827 [inline]
RIP: 0010:preempt_count_add+0xbc/0x180 kernel/sched/core.c:5850
Code: 00 85 c0 74 0a 45 31 f6 31 ff e8 7f b0 0d 00 65 48 8b 1d 17 72 a3 7e 48 81 c3 b0 14 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 3a 31 87 00 4c 89 33 5b 41 5e 41 5f c3 e8 ec 55
RSP: 0018:ffffc90003e1f3e8 EFLAGS: 00000246
RAX: 1ffff11004b0d296 RBX: ffff8880258694b0 RCX: ffffffff8ad23100
RDX: ffff888025868000 RSI: 0000000000000001 RDI: ffffffff813d8251
RBP: ffffc90003e1f4e0 R08: ffffffff813d8231 R09: ffffc90003e1f5d0
R10: 0000000000000003 R11: ffff888025868000 R12: ffff888025868000
R13: dffffc0000000000 R14: ffffffff813d8251 R15: dffffc0000000000
FS:  0000555555bba480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f22fb8c56be CR3: 000000002d914000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 unwind_next_frame+0xc1/0x29e0 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x146/0x1a0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1800 [inline]
 slab_free_freelist_hook mm/slub.c:1826 [inline]
 slab_free mm/slub.c:3809 [inline]
 __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3822
 tomoyo_realpath_from_path+0x5a3/0x5e0 security/tomoyo/realpath.c:286
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x28d/0x700 security/tomoyo/file.c:822
 security_inode_getattr+0xd3/0x120 security/security.c:2153
 vfs_getattr+0x2a/0x3a0 fs/stat.c:206
 vfs_statx+0x198/0x4c0 fs/stat.c:281
 vfs_fstatat fs/stat.c:315 [inline]
 __do_sys_newfstatat fs/stat.c:485 [inline]
 __se_sys_newfstatat fs/stat.c:479 [inline]
 __x64_sys_newfstatat+0x14f/0x1d0 fs/stat.c:479
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc826c7b58a
Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b0 ff ff ff f7
RSP: 002b:00007ffd1da78938 EFLAGS: 00000286 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc826c7b58a
RDX: 00007ffd1da78960 RSI: 00007ffd1da789f0 RDI: 00000000ffffff9c
RBP: 00007ffd1da789f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000286 R12: 00007ffd1da79ab0
R13: 00007fc826cc73b9 R14: 00000000000f5875 R15: 0000000000000001
 </TASK>