INFO: task syz.5.360:9175 blocked for more than 143 seconds.
Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.360 state:D stack:15000 pid:9175 tgid:9174 ppid:6239 task_flags:0x400140 flags:0x00000004
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 include/linux/pagemap.h:1137 [inline]
truncate_inode_pages_range+0xa77/0xda0 mm/truncate.c:429
truncate_inode_pages mm/truncate.c:456 [inline]
truncate_pagecache mm/truncate.c:765 [inline]
truncate_setsize+0xcf/0xf0 mm/truncate.c:790
bchfs_truncate+0x637/0xcc0 fs/bcachefs/fs-io.c:486
notify_change+0xb33/0xe40 fs/attr.c:552
do_truncate+0x19a/0x220 fs/open.c:65
do_ftruncate+0x489/0x540 fs/open.c:192
do_sys_ftruncate fs/open.c:207 [inline]
__do_sys_ftruncate fs/open.c:212 [inline]
__se_sys_ftruncate fs/open.c:210 [inline]
__x64_sys_ftruncate+0x92/0xf0 fs/open.c:210
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: 0033:0x7ff27398e969
RSP: 002b:00007ff27487c038 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007ff273bb5fa0 RCX: 00007ff27398e969
RDX: 0000000000000000 RSI: 0000000000000f09 RDI: 000000000000000b
RBP: 00007ff273a10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff273bb5fa0 R15: 00007ffcf265f388
INFO: task syz.5.360:9234 blocked for more than 144 seconds.
Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.360 state:D stack:20608 pid:9234 tgid:9174 ppid:6239 task_flags:0x440140 flags:0x00004006
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_readahead mm/filemap.c:2560 [inline]
filemap_get_pages+0xb22/0x1eb0 mm/filemap.c:2605
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
do_sendfile+0x4da/0x7d0 fs/read_write.c:1368
__do_sys_sendfile64 fs/read_write.c:1429 [inline]
__se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1415
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: 0033:0x7ff27398e969
RSP: 002b:00007ff27485b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff273bb6080 RCX: 00007ff27398e969
RDX: 0000000000000000 RSI: 000000000000000d RDI: 000000000000000d
RBP: 00007ff273a10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000e0000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff273bb6080 R15: 00007ffcf265f388
Showing all locks held in the system:
2 locks held by ksoftirqd/0/15:
1 lock held by khungtaskd/31:
#0: ffffffff8df3d860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3d860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8df3d860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764
2 locks held by kworker/u8:3/53:
2 locks held by getty/5578:
#0: ffff88814d1ce0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz.5.360/9175:
#0: ffff888044f84420 (sb_writers#22){.+.+}-{0:0}, at: do_ftruncate+0x42a/0x540 fs/open.c:191
#1: ffff88804f0545a0 (&sb->s_type->i_mutex_key#29){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff88804f0545a0 (&sb->s_type->i_mutex_key#29){++++}-{4:4}, at: do_truncate+0x186/0x220 fs/open.c:63
1 lock held by syz.5.360/9234:
#0: ffff88804f054740 (mapping.invalidate_lock#7){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff88804f054740 (mapping.invalidate_lock#7){.+.+}-{4:4}, at: page_cache_ra_order+0x445/0xc70 mm/readahead.c:491
1 lock held by sed/11921:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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: 11926 Comm: cmp Not tainted 6.15.0-rc5-syzkaller-00353-gcd802e7e5f1e #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d cc d5 d5 0b 48 89 de 5b e9 e3 3c 55 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 50 72 92 65 8b 15 98 81
RSP: 0018:ffffc90014a3fa60 EFLAGS: 00000292
RAX: ffffffff8b472368 RBX: ffffc90014a3fc40 RCX: ffff88802c058000
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffc90014a3fc40
RBP: dffffc0000000000 R08: ffff88802c058000 R09: 0000000000000006
R10: 0000000000000007 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffffffffffff R14: ffffc90014a3fc40 R15: ffffffffffffffff
FS: 00007fbbd72c3c80(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbbd72fee9c CR3: 000000002ff7c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mas_next_slot+0x2a/0xcf0 lib/maple_tree.c:4650
mas_find+0x9e7/0xc10 lib/maple_tree.c:6014
vma_next include/linux/mm.h:1088 [inline]
acct_collect+0x1e1/0x770 kernel/acct.c:598
do_exit+0x7e3/0x2550 kernel/exit.c:932
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111
x64_sys_call+0x21ba/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7fbbd745d6c5
Code: ff ff ff 64 89 02 eb d2 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 35 21 f7 0f 00 ba e7 00 00 00 eb 03 66 90 f4 89 d0 0f 05 <48> 3d 00 f0 ff ff 76 f3 f7 d8 64 89 06 eb ec 66 2e 0f 1f 84 00 00
RSP: 002b:00007ffeb497bfc8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fbbd755efe8 RCX: 00007fbbd745d6c5
RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000
RBP: 0000000000000001 R08: 00007ffeb497bf58 R09: 0000000000000000
R10: 00007ffeb497bdf0 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbbd755d680 R15: 00007fbbd755f000