INFO: task syz.1.324:8996 blocked for more than 143 seconds.
Not tainted 6.14.0-rc7-syzkaller-00202-g183601b78a9b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.324 state:D stack:18016 pid:8996 tgid:8995 ppid:5825 task_flags:0x440140 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
__bch2_two_state_lock+0x229/0x2c0 fs/bcachefs/two_state_shared_lock.c:7
bch2_two_state_lock fs/bcachefs/two_state_shared_lock.h:55 [inline]
bch2_readahead+0x9e1/0x1240 fs/bcachefs/fs-io-buffered.c:272
read_pages+0x179/0x570 mm/readahead.c:160
page_cache_ra_order+0xa36/0xca0 mm/readahead.c:515
filemap_readahead mm/filemap.c:2559 [inline]
filemap_get_pages+0x9e4/0x1fb0 mm/filemap.c:2604
filemap_splice_read+0x68e/0xef0 mm/filemap.c:2980
do_splice_read fs/splice.c:985 [inline]
splice_direct_to_actor+0x4af/0xc80 fs/splice.c:1089
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x289/0x3e0 fs/splice.c:1233
do_sendfile+0x564/0x8a0 fs/read_write.c:1363
__do_sys_sendfile64 fs/read_write.c:1424 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1410
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f56b738d169
RSP: 002b:00007f56b51f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f56b75a5fa0 RCX: 00007f56b738d169
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005
RBP: 00007f56b740e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000e0000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f56b75a5fa0 R15: 00007fff8691db38
</TASK>
INFO: task syz.1.324:9061 blocked for more than 144 seconds.
Not tainted 6.14.0-rc7-syzkaller-00202-g183601b78a9b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.324 state:D stack:24592 pid:9061 tgid:8995 ppid:5825 task_flags:0x400040 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
io_schedule+0x8d/0x110 kernel/sched/core.c:7690
folio_wait_bit_common+0x839/0xee0 mm/filemap.c:1317
folio_lock include/linux/pagemap.h:1163 [inline]
truncate_inode_pages_range+0xc1f/0x10e0 mm/truncate.c:380
truncate_inode_pages mm/truncate.c:407 [inline]
truncate_pagecache mm/truncate.c:716 [inline]
truncate_setsize+0xcf/0xf0 mm/truncate.c:741
bchfs_truncate+0x6e0/0xc80 fs/bcachefs/fs-io.c:471
notify_change+0xbca/0xe90 fs/attr.c:552
do_truncate+0x220/0x310 fs/open.c:65
handle_truncate fs/namei.c:3451 [inline]
do_open fs/namei.c:3834 [inline]
path_openat+0x2e1b/0x3590 fs/namei.c:3989
do_filp_open+0x27f/0x4e0 fs/namei.c:4016
do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_creat fs/open.c:1521 [inline]
__se_sys_creat fs/open.c:1515 [inline]
__x64_sys_creat+0x123/0x170 fs/open.c:1515
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f56b738d169
RSP: 002b:00007f56b51d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f56b75a6080 RCX: 00007f56b738d169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000340
RBP: 00007f56b740e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f56b75a6080 R15: 00007fff8691db38
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
3 locks held by kworker/u8:6/1154:
2 locks held by getty/5580:
#0: ffff88803168e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
2 locks held by dhcpcd/8041:
#0: ffff88807478ca08 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#0: ffff88807478ca08 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: __sock_release net/socket.c:646 [inline]
#0: ffff88807478ca08 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: sock_close+0x90/0x240 net/socket.c:1398
#1: ffffffff8eb3e8b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:302 [inline]
#1: ffffffff8eb3e8b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x820 kernel/rcu/tree_exp.h:996
1 lock held by syz.1.324/8996:
#0: ffff88805a4528e0 (mapping.invalidate_lock#10){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
#0: ffff88805a4528e0 (mapping.invalidate_lock#10){.+.+}-{4:4}, at: page_cache_ra_order+0x45d/0xca0 mm/readahead.c:491
2 locks held by syz.1.324/9061:
#0: ffff888074a5e420 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
#1: ffff88805a452740 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#1: ffff88805a452740 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: do_truncate+0x20c/0x310 fs/open.c:63
2 locks held by syz-executor/9231:
#0: ffff8880292420e0 (&type->s_umount_key#68){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880292420e0 (&type->s_umount_key#68){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880292420e0 (&type->s_umount_key#68){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8ef5b3e8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/10207:
#0: ffff8880750960e0 (&type->s_umount_key#70){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880750960e0 (&type->s_umount_key#70){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880750960e0 (&type->s_umount_key#70){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8eb3e780 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3741
1 lock held by syz-executor/10535:
1 lock held by syz.5.607/11472:
#0: ffff8880292420e0 (&type->s_umount_key#68){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880292420e0 (&type->s_umount_key#68){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by sed/11685:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc7-syzkaller-00202-g183601b78a9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 63 Comm: kworker/u8:4 Not tainted 6.14.0-rc7-syzkaller-00202-g183601b78a9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4866 [inline]
RIP: 0010:__lock_acquire+0x6e0/0x2100 kernel/locking/lockdep.c:5178
Code: 00 41 f6 47 01 80 0f 85 63 04 00 00 4c 89 64 24 48 84 db 40 0f b6 c5 0f b6 cb 0f 44 c8 89 4c 24 6c 48 8b 44 24 30 0f b6 04 10 <84> c0 0f 85 df 13 00 00 48 8b 04 24 8b 28 41 89 ec ff cd 0f 88 a5
RSP: 0018:ffffc90001547850 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffff88801cf8c6f0 RDI: ffffffff94517840
RBP: 0000000000000003 R08: ffffffff94517847 R09: 1ffffffff28a2f08
R10: dffffc0000000000 R11: fffffbfff28a2f09 R12: ffff88801cf8c6d4
R13: ffff88801cf8bc00 R14: 1ffff110039f18ec R15: ffff88801cf8c760
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005590d0e23950 CR3: 0000000079c10000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>