INFO: task syz.0.416:9799 blocked for more than 143 seconds.
Not tainted 6.15.0-rc5-syzkaller-00123-g2c89c1b655c0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.416 state:D stack:16392 pid:9799 tgid:9798 ppid:6927 task_flags:0x440140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6860
__bch2_two_state_lock+0x1ea/0x370 fs/bcachefs/two_state_shared_lock.c:7
bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline]
bch2_readahead+0x94f/0x1100 fs/bcachefs/fs-io-buffered.c:296
read_pages+0x177/0x590 mm/readahead.c:160
page_cache_ra_order+0xa24/0xc70 mm/readahead.c:515
filemap_get_pages+0x43c/0x1eb0 mm/filemap.c:2591
filemap_splice_read+0x4fc/0xbc0 mm/filemap.c:2981
do_splice_read fs/splice.c:979 [inline]
splice_direct_to_actor+0x4a6/0xcc0 fs/splice.c:1083
do_splice_direct_actor fs/splice.c:1201 [inline]
do_splice_direct+0x181/0x270 fs/splice.c:1227
vfs_copy_file_range+0xabc/0x1310 fs/read_write.c:1625
__do_sys_copy_file_range fs/read_write.c:1675 [inline]
__se_sys_copy_file_range+0x319/0x460 fs/read_write.c:1642
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6bad8e969
RSP: 002b:00007fc6bbc5b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007fc6bafb5fa0 RCX: 00007fc6bad8e969
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fc6bae10ab1 R08: 0000000000000101 R09: 0000000000000000
R10: 00002000000000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc6bafb5fa0 R15: 00007ffdec3305c8
INFO: task syz.0.416:9860 blocked for more than 144 seconds.
Not tainted 6.15.0-rc5-syzkaller-00123-g2c89c1b655c0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.416 state:D stack:28936 pid:9860 tgid:9798 ppid:6927 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6860
io_schedule+0x81/0xe0 kernel/sched/core.c:7742
folio_wait_bit_common+0x6b0/0xb90 mm/filemap.c:1317
__folio_lock mm/filemap.c:1664 [inline]
folio_lock include/linux/pagemap.h:1137 [inline]
__filemap_get_folio+0x139/0xaf0 mm/filemap.c:1917
filemap_lock_folio include/linux/pagemap.h:775 [inline]
__bch2_truncate_folio+0x11d/0x19d0 fs/bcachefs/fs-io.c:289
bch2_truncate_folios fs/bcachefs/fs-io.c:398 [inline]
bchfs_fpunch+0x10f/0x520 fs/bcachefs/fs-io.c:564
bch2_fallocate_dispatch+0x379/0x4e0 fs/bcachefs/fs-io.c:838
vfs_fallocate+0x6a0/0x830 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xc0/0x110 fs/open.c:365
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc6bad8e969
RSP: 002b:00007fc6bbc19038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fc6bafb6160 RCX: 00007fc6bad8e969
RDX: 0000000000000f00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 00007fc6bae10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fc6bafb6160 R15: 00007ffdec3305c8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764
2 locks held by getty/5579:
#0: ffff88814ce5f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900033332f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz.0.416/9799:
#0: ffff888057084740 (mapping.invalidate_lock#15){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888057084740 (mapping.invalidate_lock#15){.+.+}-{4:4}, at: page_cache_ra_order+0x445/0xc70 mm/readahead.c:491
2 locks held by syz.0.416/9860:
#0: ffff888028eca420 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888028eca420 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x62a/0x830 fs/open.c:337
#1: ffff8880570845a0 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff8880570845a0 (&sb->s_type->i_mutex_key#20){++++}-{4:4}, at: bch2_fallocate_dispatch+0x1ce/0x4e0 fs/bcachefs/fs-io.c:827
1 lock held by sed/12580:
#0: ffff8880b89399d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc5-syzkaller-00123-g2c89c1b655c0 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:437
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12583 Comm: dhcpcd-run-hook Not tainted 6.15.0-rc5-syzkaller-00123-g2c89c1b655c0 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:check_preemption_disabled+0x63/0x120 lib/smp_processor_id.c:19
Code: 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d c3 cc cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 <74> c8 65 4c 8b 3c 25 08 00 72 92 41 f6 47 2f 04 74 0a 41 83 bf 18
RSP: 0018:ffffc9000b56f078 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000206 RCX: 0000000080000000
RDX: ffffffff901a5301 RSI: ffffffff8d74a802 RDI: ffffffff8bc0fee0
RBP: dffffc0000000000 R08: ffffc9000b56f247 R09: 0000000000000000
R10: ffffc9000b56f238 R11: fffff520016ade49 R12: ffffc9000b56ff00
R13: ffffffff8171a9f5 R14: ffffffff8df3b860 R15: ffff888024fc8000
FS: 0000000000000000(0000) GS:ffff888126100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5890bc7286 CR3: 000000004751a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:467 [inline]
lock_release+0xbc/0x3e0 kernel/locking/lockdep.c:5886
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:548
__call_rcu_common kernel/rcu/tree.c:3082 [inline]
call_rcu+0x142/0x990 kernel/rcu/tree.c:3202
slab_free_hook mm/slub.c:2344 [inline]
slab_free mm/slub.c:4642 [inline]
kmem_cache_free+0x301/0x3f0 mm/slub.c:4744
exit_mmap+0x593/0xba0 mm/mmap.c:1309
__mmput+0x118/0x410 kernel/fork.c:1379
exec_mmap+0x680/0x7a0 fs/exec.c:1009
begin_new_exec+0x129c/0x2120 fs/exec.c:1264
load_elf_binary+0x973/0x27b0 fs/binfmt_elf.c:1001
search_binary_handler fs/exec.c:1778 [inline]
exec_binprm fs/exec.c:1810 [inline]
bprm_execve+0x999/0x1440 fs/exec.c:1862
do_execveat_common+0x510/0x6a0 fs/exec.c:1968
do_execve fs/exec.c:2042 [inline]
__do_sys_execve fs/exec.c:2118 [inline]
__se_sys_execve fs/exec.c:2113 [inline]
__x64_sys_execve+0x94/0xb0 fs/exec.c:2113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5890b0d107
Code: Unable to access opcode bytes at 0x7f5890b0d0dd.
RSP: 002b:00007ffe8d504aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00005562a90c90c8 RCX: 00007f5890b0d107
RDX: 00005562a90c90e8 RSI: 00005562a90c90c8 RDI: 00005562a90c9170
RBP: 00005562a90c9170 R08: 00007ffe8d507e76 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00005562a90c90e8
R13: 00007f5890cd2e8b R14: 00005562a90c90e8 R15: 0000000000000000