INFO: task syz-executor:5806 blocked for more than 143 seconds.
Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21720 pid:5806 tgid:5806 ppid:5805 task_flags:0x400100 flags:0x00000002
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
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:678 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:746
anon_pipe_read+0x125/0x1040 fs/pipe.c:283
new_sync_read fs/read_write.c:489 [inline]
vfs_read+0x4d0/0x980 fs/read_write.c:570
ksys_read+0x145/0x250 fs/read_write.c:713
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: 0033:0x7f00bed8d33d
RSP: 002b:00007ffc45a1a398 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000555569571290 RCX: 00007f00bed8d33d
RDX: 0000000000000400 RSI: 000055556956f310 RDI: 0000000000000025
RBP: 00007ffc45a1a6c0 R08: 000000000fb62a12 R09: 000055556956d2d8
R10: 3fffffffffffffff R11: 0000000000000246 R12: 00005555695713a8
R13: 000055556956d2b8 R14: 00007ffc45a1a440 R15: 00005555695b9330
INFO: task syz.2.437:9856 blocked for more than 144 seconds.
Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.437 state:D stack:16584 pid:9856 tgid:9853 ppid:9239 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_file_to_pipe+0x270/0x440 fs/splice.c:1289
do_sendfile+0x475/0x7d0 fs/read_write.c:1374
__do_sys_sendfile64 fs/read_write.c:1423 [inline]
__se_sys_sendfile64+0xd9/0x190 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: 0033:0x7f730bd8e969
RSP: 002b:00007f730cb2f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f730bfb5fa0 RCX: 00007f730bd8e969
RDX: 0000200000000080 RSI: 0000000000000007 RDI: 0000000000000000
RBP: 00007f730be10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000fff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f730bfb5fa0 R15: 00007ffd3f002368
INFO: task syz.2.437:9919 blocked for more than 144 seconds.
Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.437 state:D stack:19368 pid:9919 tgid:9853 ppid:9239 task_flags:0x400140 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 include/linux/pagemap.h:1137 [inline]
invalidate_inode_pages2_range+0x557/0xa80 mm/truncate.c:686
bch2_write_invalidate_inode_pages_range+0xc5/0x110 fs/bcachefs/fs-io-pagecache.c:68
bch2_direct_write+0x2abc/0x2d50 fs/bcachefs/fs-io-direct.c:661
bch2_write_iter+0x18f/0x2b90 fs/bcachefs/fs-io-buffered.c:1072
iter_file_splice_write+0x937/0x1000 fs/splice.c:738
do_splice_from fs/splice.c:935 [inline]
direct_splice_actor+0xfe/0x160 fs/splice.c:1158
splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1102
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: 0033:0x7f730bd8e969
RSP: 002b:00007f730cb0e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f730bfb6080 RCX: 00007f730bd8e969
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000006
RBP: 00007f730be10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f730bfb6080 R15: 00007ffd3f002368
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764
4 locks held by kworker/u8:8/3515:
#0: ffff8880b88399d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffffc9000bee7c60 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000bee7c60 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319
#2: ffff8880b8825558 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1046 [inline]
#2: ffff8880b8825558 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30 kernel/time/timer.c:1127
#3: ffffffff99aaf718 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0xbb/0x420 lib/debugobjects.c:818
2 locks held by getty/5579:
#0: ffff8880345120a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ffe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5806:
#0: ffff888078095868 (&pipe->mutex){+.+.}-{4:4}, at: anon_pipe_read+0x125/0x1040 fs/pipe.c:283
2 locks held by syz.2.437/9856:
#0: ffff888078095868 (&pipe->mutex){+.+.}-{4:4}, at: splice_file_to_pipe+0x2e/0x440 fs/splice.c:1286
#1: ffff88805e1174d0 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#1: ffff88805e1174d0 (mapping.invalidate_lock#11){.+.+}-{4:4}, at: page_cache_ra_order+0x445/0xc70 mm/readahead.c:491
1 lock held by syz.2.437/9919:
#0: ffff88804c0e8420 (sb_writers#17){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 fs/splice.c:1157
1 lock held by bch-rebalance/l/9899:
2 locks held by sed/12560:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #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: 12562 Comm: cmp Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:page_rmappable_folio+0x0/0x170 mm/internal.h:749
Code: a3 ff e9 8c fe ff ff e8 0e 2e a3 ff e9 1a ff ff ff 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 41 55 41 54 53 48 89 fb e8 de 2d a3 ff 48 85 db 0f
RSP: 0018:ffffc90014b87458 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea000153c840 RCX: ffffffff821cc1c0
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea000153c840
RBP: ffffc90014b87520 R08: ffffea000153c877 R09: 1ffffd40002a790e
R10: dffffc0000000000 R11: fffff940002a790f R12: ffff8880213bfc80
R13: 0000000000000000 R14: ffffffff99836c80 R15: 0000000000140dca
FS: 0000000000000000(0000) GS:ffff8881260f9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc4a5ebeb9 CR3: 0000000033c82000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
folio_alloc_mpol_noprof mm/mempolicy.c:2326 [inline]
vma_alloc_folio_noprof+0x101/0x200 mm/mempolicy.c:2355
folio_prealloc+0x30/0x180 mm/memory.c:-1
alloc_anon_folio mm/memory.c:4943 [inline]
do_anonymous_page mm/memory.c:5000 [inline]
do_pte_missing mm/memory.c:4158 [inline]
handle_pte_fault mm/memory.c:5997 [inline]
__handle_mm_fault+0x2b28/0x5380 mm/memory.c:6140
handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6309
do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1388
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x68/0x110 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x11/0x90 arch/x86/lib/copy_user_64.S:47
Code: c3 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 83 f9 40 73 44 83 f9 08 73 25 85 c9 74 0f 8a 06 <88> 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 66 2e 0f 1f
RSP: 0018:ffffc90014b87988 EFLAGS: 00050202
RAX: ffffffff84b1ca78 RBX: 0000000000000007 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffffff8b7a8ec0 RDI: 00007ffc4a5ebeb9
RBP: ffffc90014b87ad0 R08: 0000000000000006 R09: 0000000000000007
R10: dffffc0000000000 R11: fffffbfff16f51d8 R12: 00007ffc4a5ebec0
R13: 00007ffffffff000 R14: ffffffff8b7a8ec0 R15: 00007ffc4a5ebeb9
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline]
_inline_copy_to_user include/linux/uaccess.h:197 [inline]
_copy_to_user+0x8a/0xb0 lib/usercopy.c:26
copy_to_user include/linux/uaccess.h:225 [inline]
create_elf_tables+0x187/0x14d0 fs/binfmt_elf.c:197
load_elf_binary+0x1c23/0x27a0 fs/binfmt_elf.c:1288
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: 0033:0x7f753161a107
Code: Unable to access opcode bytes at 0x7f753161a0dd.
RSP: 002b:00007ffdd55ba138 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055a97f512298 RCX: 00007f753161a107
RDX: 000055a97f50e038 RSI: 000055a97f512298 RDI: 000055a97f50e0e8
RBP: 000055a97f50e0e8 R08: 00007ffdd55bed37 R09: 0000000000000210
R10: 0000000000000230 R11: 0000000000000246 R12: 000055a97f50e038
R13: 00007f75317dfe8b R14: 000055a97f50e038 R15: 0000000000000000