INFO: task syz.2.16:3363 blocked for more than 143 seconds.
Not tainted 6.12.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.16 state:D stack:24176 pid:3363 tgid:3362 ppid:2960 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1718/0x29a0 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0xb1/0x270 kernel/sched/core.c:6767
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:870 [inline]
page_cache_ra_unbounded+0x129/0x700 mm/readahead.c:226
filemap_readahead mm/filemap.c:2519 [inline]
filemap_get_pages+0x81a/0x1ef0 mm/filemap.c:2564
filemap_splice_read+0x5d3/0xcd0 mm/filemap.c:2921
do_splice_read fs/splice.c:985 [inline]
splice_direct_to_actor+0x3b9/0xae0 fs/splice.c:1089
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x233/0x350 fs/splice.c:1233
do_sendfile+0x4bb/0xc80 fs/read_write.c:1388
__do_sys_sendfile64 fs/read_write.c:1455 [inline]
__se_sys_sendfile64+0x143/0x190 fs/read_write.c:1441
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d3d78e169
RSP: 002b:00007f7d3e548038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7d3d9b5fa0 RCX: 00007f7d3d78e169
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 00007f7d3d810a68 R08: 0000000000000000 R09: 0000000000000000
R10: 000400000000003f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7d3d9b5fa0 R15: 00007ffdcc86e968
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff87e80f80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff87e80f80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff87e80f80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/1491:
#0: ffff88810cb2c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x60 drivers/tty/tty_ldisc.c:243
#1: ffffc900000632f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x40a/0x1250 drivers/tty/n_tty.c:2211
1 lock held by syz.2.16/3363:
#0: ffff88811154e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:870 [inline]
#0: ffff88811154e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x129/0x700 mm/readahead.c:226
1 lock held by syz.2.16/3365:
#0: ffff88811154e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline]
#0: ffff88811154e540 (mapping.invalidate_lock#2){++++}-{4:4}, at: blkdev_fallocate+0x186/0x380 block/fops.c:808
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x198/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x353/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x104/0x210 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xb60/0xba0 kernel/hung_task.c:379
kthread+0x2e0/0x380 kernel/kthread.c:389
ret_from_fork+0x32/0x60 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12720 Comm: syz-executor Not tainted 6.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:tomoyo_realpath_from_path+0x151/0x4e0 security/tomoyo/realpath.c:257
Code: 24 50 74 08 48 89 df e8 ad 62 d5 fe 4d 89 fd 48 8b 1b 48 85 db 48 8b 0c 24 74 29 48 83 c3 48 48 89 d8 48 c1 e8 03 80 3c 28 00 <74> 0c 48 89 df e8 85 62 d5 fe 48 8b 0c 24 4c 8b 1b 4d 85 db 0f 85
RSP: 0018:ffffc90002ea7510 EFLAGS: 00000246
RAX: 1ffffffff0d2bb89 RBX: ffffffff8695dc48 RCX: ffff88817a236068
RDX: 0000000000001000 RSI: ffffffff86b9b380 RDI: ffffffff86b9b340
RBP: dffffc0000000000 R08: 0000000000000c40 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff1158ab6 R12: 0000000000000fff
R13: ffff888176b84000 R14: 0000000000001000 R15: ffff888176b84000
FS: 0000555584fe0500(0000) GS:ffff8881f5d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1518db5f00 CR3: 0000000162a88000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x24a/0x450 security/tomoyo/file.c:771
security_file_open+0x41/0xd0 security/security.c:3107
do_dentry_open+0x2c1/0xf90 fs/open.c:945
vfs_open+0x36/0x290 fs/open.c:1088
do_open fs/namei.c:3774 [inline]
path_openat+0x278f/0x2fc0 fs/namei.c:3933
do_filp_open+0x22b/0x440 fs/namei.c:3960
do_sys_openat2+0xf6/0x180 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_openat fs/open.c:1446 [inline]
__se_sys_openat fs/open.c:1441 [inline]
__x64_sys_openat+0x20d/0x260 fs/open.c:1441
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1518d8cad0
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44
RSP: 002b:00007ffd8e07ad30 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000080001 RCX: 00007f1518d8cad0
RDX: 0000000000080001 RSI: 00007f1518e122a4 RDI: 00000000ffffff9c
RBP: 00007f1518e122a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000004
R13: 00007ffd8e07add0 R14: 0000000000039171 R15: 00007ffd8e07b340