------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.151/6577 is trying to acquire lock:
ffffffff8e6f1420 (console_owner){-...}-{0:0}, at: console_lock_spinning_enable+0x61/0x80 kernel/printk/printk.c:1902
but task is already holding lock:
ffff8880b843b3e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:660 [inline]
ffff8880b843b3e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:644
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:382
raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:652
raw_spin_rq_lock kernel/sched/sched.h:1624 [inline]
_task_rq_lock+0xcf/0x510 kernel/sched/core.c:747
cgroup_move_task+0x81/0x320 kernel/sched/psi.c:1170
css_set_move_task+0x285/0x600 kernel/cgroup/cgroup.c:899
cgroup_post_fork+0x202/0x9b0 kernel/cgroup/cgroup.c:6944
copy_process+0x5b91/0x7e00 kernel/fork.c:2524
kernel_clone+0x12e/0x9c0 kernel/fork.c:2721
user_mode_thread+0xcc/0x110 kernel/fork.c:2797
rest_init+0x21/0x260 init/main.c:727
start_kernel+0x484/0x490 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:571 [inline]
try_to_wake_up+0xb5/0x1900 kernel/sched/core.c:4190
__wake_up_common+0x135/0x1f0 kernel/sched/wait.c:108
__wake_up_common_lock kernel/sched/wait.c:125 [inline]
__wake_up+0x31/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x52/0x70 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68f/0x860 drivers/tty/serial/8250/8250_port.c:1721
serial8250_handle_irq_locked+0x5e6/0x7e0 drivers/tty/serial/8250/8250_port.c:1825
serial8250_handle_irq.part.0+0xb4/0x530 drivers/tty/serial/8250/8250_port.c:1841
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1837 [inline]
serial8250_default_handle_irq+0xc2/0x290 drivers/tty/serial/8250/8250_port.c:1855
serial8250_interrupt+0xf8/0x1c0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x235/0x8c0 kernel/irq/handle.c:209
handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:263
handle_edge_irq+0x35e/0x960 kernel/irq/chip.c:856
generic_handle_irq_desc include/linux/irqdesc.h:186 [inline]
handle_irq arch/x86/kernel/irq.c:262 [inline]
call_irq_handler arch/x86/kernel/irq.c:318 [inline]
__common_interrupt+0xd8/0x2f0 arch/x86/kernel/irq.c:333
common_interrupt+0xb9/0xe0 arch/x86/kernel/irq.c:326
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0x3c8/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4569 [inline]
slab_alloc_node mm/slub.c:4898 [inline]
kmem_cache_alloc_noprof+0x241/0x6e0 mm/slub.c:4905
mt_alloc_one lib/maple_tree.c:139 [inline]
mas_alloc_nodes lib/maple_tree.c:1089 [inline]
mas_preallocate+0x1105/0x14a0 lib/maple_tree.c:4961
vma_iter_prealloc mm/vma.h:577 [inline]
__split_vma+0x33d/0xd90 mm/vma.c:529
vms_gather_munmap_vmas+0x1d2/0x1720 mm/vma.c:1427
__mmap_setup mm/vma.c:2439 [inline]
__mmap_region+0x4aa/0x2da0 mm/vma.c:2753
mmap_region+0x35d/0x620 mm/vma.c:2857
do_mmap+0xc63/0x12f0 mm/mmap.c:560
vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:606
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (&tty->write_wait){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
__wake_up_common_lock kernel/sched/wait.c:124 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x52/0x70 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68f/0x860 drivers/tty/serial/8250/8250_port.c:1721
serial8250_handle_irq_locked+0x5e6/0x7e0 drivers/tty/serial/8250/8250_port.c:1825
serial8250_handle_irq.part.0+0xb4/0x530 drivers/tty/serial/8250/8250_port.c:1841
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1837 [inline]
serial8250_default_handle_irq+0xc2/0x290 drivers/tty/serial/8250/8250_port.c:1855
serial8250_interrupt+0xf8/0x1c0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x235/0x8c0 kernel/irq/handle.c:209
handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:263
handle_edge_irq+0x35e/0x960 kernel/irq/chip.c:856
generic_handle_irq_desc include/linux/irqdesc.h:186 [inline]
handle_irq arch/x86/kernel/irq.c:262 [inline]
call_irq_handler arch/x86/kernel/irq.c:318 [inline]
__common_interrupt+0xd8/0x2f0 arch/x86/kernel/irq.c:333
common_interrupt+0xb9/0xe0 arch/x86/kernel/irq.c:326
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:62
arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x464/0x590 kernel/sched/idle.c:352
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
rest_init+0x251/0x260 init/main.c:762
start_kernel+0x484/0x490 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #1 (&port_lock_key){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x17e/0x1900 drivers/tty/serial/8250/8250_port.c:3316
console_emit_next_record kernel/printk/printk.c:3183 [inline]
console_flush_one_record+0x790/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
register_console.cold+0xc0/0x248 kernel/printk/printk.c:4208
univ8250_console_init+0x6f/0x80 drivers/tty/serial/8250/8250_core.c:515
console_init+0x3f7/0x5e0 kernel/printk/printk.c:4407
start_kernel+0x30a/0x490 init/main.c:1157
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #0 (console_owner){-...}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902
console_emit_next_record kernel/printk/printk.c:3177 [inline]
console_flush_one_record+0x739/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
__report_bug.cold+0x15/0x137 lib/bug.c:240
report_bug+0xb2/0x220 lib/bug.c:278
handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline]
update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850
pick_next_task kernel/sched/core.c:6222 [inline]
__schedule+0x1cd8/0x6820 kernel/sched/core.c:7105
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:5945
__get_obj_cgroup_from_memcg+0x10a/0x290 mm/memcontrol.c:2887
get_obj_cgroup_from_memcg mm/memcontrol.c:2901 [inline]
charge_memcg+0x4d/0x210 mm/memcontrol.c:5012
__mem_cgroup_charge+0x2b/0x1c0 mm/memcontrol.c:5032
mem_cgroup_charge include/linux/memcontrol.h:644 [inline]
shmem_alloc_and_add_folio+0x451/0xd40 mm/shmem.c:1985
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2564
shmem_get_folio mm/shmem.c:2670 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3303
generic_perform_write+0x292/0xa40 mm/filemap.c:4325
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3478
__kernel_write_iter+0x2ac/0x920 fs/read_write.c:621
dump_emit_page fs/coredump.c:1304 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1378
elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2109
coredump_write fs/coredump.c:1053 [inline]
do_coredump fs/coredump.c:1132 [inline]
vfs_coredump+0x29a0/0x5770 fs/coredump.c:1206
get_signal+0x1f2a/0x21e0 kernel/signal.c:3022
arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:252 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:323 [inline]
irqentry_exit+0x403/0x790 kernel/entry/common.c:162
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
other info that might help us debug this:
Chain exists of:
console_owner --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock(console_owner);
*** DEADLOCK ***
6 locks held by syz.2.151/6577:
#0: ffff88807ea26410 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x1f2a/0x21e0 kernel/signal.c:3022
#1: ffff88805a99f518 (&sb->s_type->i_mutex_key#15){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#1: ffff88805a99f518 (&sb->s_type->i_mutex_key#15){++++}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3468
#2: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#2: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#2: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: get_obj_cgroup_from_memcg mm/memcontrol.c:2900 [inline]
#2: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: charge_memcg+0x23/0x210 mm/memcontrol.c:5012
#3: ffff8880b843b3e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:660 [inline]
#3: ffff8880b843b3e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:644
#4: ffffffff8e7d1860 (console_lock){+.+.}-{0:0}, at: _printk+0xcf/0x110 kernel/printk/printk.c:2504
#5: ffffffff8e7d18d8 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:305 [inline]
#5: ffffffff8e7d18d8 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline]
#5: ffffffff8e7d18d8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline]
#5: ffffffff8e7d18d8 (console_srcu){....}-{0:0}, at: console_flush_one_record+0xfd/0xe50 kernel/printk/printk.c:3246
stack backtrace:
CPU: 0 UID: 0 PID: 6577 Comm: syz.2.151 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1b1/0x370 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902
console_emit_next_record kernel/printk/printk.c:3177 [inline]
console_flush_one_record+0x739/0xe50 kernel/printk/printk.c:3269
console_flush_all kernel/printk/printk.c:3343 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3413
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
__report_bug.cold+0x15/0x137 lib/bug.c:240
report_bug+0xb2/0x220 lib/bug.c:278
handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline]
RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850
Code: ab 88 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 80 0b 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc9000546e848 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853b380 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8def5d4b RDI: ffffffff8c1c2500
RBP: ffffc9000546e9f8 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90d7c957 R11: 0000000000000000 R12: ffffffff90d7fcc4
R13: ffff8880b853c220 R14: ffff88801e689ec0 R15: ffff8880b853b380
pick_next_task kernel/sched/core.c:6222 [inline]
__schedule+0x1cd8/0x6820 kernel/sched/core.c:7105
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:5945
Code: ff ff ff ff 65 0f c1 15 f1 15 83 08 83 fa 01 8b 44 24 04 75 2d 9c 5a 80 e6 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 83 c4 08 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e9 57 39 03 00 31 c0
RSP: 0018:ffffc9000546eb08 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffffffff8e7e52e0 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8def5d4b RDI: ffffffff8c1c2500
RBP: ffff8880369abd80 R08: 00000000c5b8ddf3 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000246 R14: ffff8880369ac960 R15: 0000000000000002
__get_obj_cgroup_from_memcg+0x10a/0x290 mm/memcontrol.c:2887
get_obj_cgroup_from_memcg mm/memcontrol.c:2901 [inline]
charge_memcg+0x4d/0x210 mm/memcontrol.c:5012
__mem_cgroup_charge+0x2b/0x1c0 mm/memcontrol.c:5032
mem_cgroup_charge include/linux/memcontrol.h:644 [inline]
shmem_alloc_and_add_folio+0x451/0xd40 mm/shmem.c:1985
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2564
shmem_get_folio mm/shmem.c:2670 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3303
generic_perform_write+0x292/0xa40 mm/filemap.c:4325
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3478
__kernel_write_iter+0x2ac/0x920 fs/read_write.c:621
dump_emit_page fs/coredump.c:1304 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1378
elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2109
coredump_write fs/coredump.c:1053 [inline]
do_coredump fs/coredump.c:1132 [inline]
vfs_coredump+0x29a0/0x5770 fs/coredump.c:1206
get_signal+0x1f2a/0x21e0 kernel/signal.c:3022
arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:252 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:323 [inline]
irqentry_exit+0x403/0x790 kernel/entry/common.c:162
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x2000000000
Code: Unable to access opcode bytes at 0x1fffffffd6.
RSP: 002b:000000000000000a EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f30f7616090 RCX: 00007f30f739cdd9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000020003b46
RBP: 00007f30f7432d69 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f30f7616128 R14: 00007f30f7616090 R15: 00007fff949aa098
debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0)
WARNING: kernel/sched/sched.h:1612 at lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline], CPU#0: syz.2.151/6577
WARNING: kernel/sched/sched.h:1612 at lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline], CPU#0: syz.2.151/6577
WARNING: kernel/sched/sched.h:1612 at update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850, CPU#0: syz.2.151/6577
Modules linked in:
CPU: 0 UID: 0 PID: 6577 Comm: syz.2.151 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1612 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1609 [inline]
RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850
Code: ab 88 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 80 0b 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc9000546e848 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853b380 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8def5d4b RDI: ffffffff8c1c2500
RBP: ffffc9000546e9f8 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90d7c957 R11: 0000000000000000 R12: ffffffff90d7fcc4
R13: ffff8880b853c220 R14: ffff88801e689ec0 R15: ffff8880b853b380
FS: 00007f30f55f66c0(0000) GS:ffff88812437d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001fffffffd6 CR3: 000000007d91e000 CR4: 00000000003526f0
Call Trace:
pick_next_task kernel/sched/core.c:6222 [inline]
__schedule+0x1cd8/0x6820 kernel/sched/core.c:7105
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:5945
Code: ff ff ff ff 65 0f c1 15 f1 15 83 08 83 fa 01 8b 44 24 04 75 2d 9c 5a 80 e6 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 83 c4 08 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e9 57 39 03 00 31 c0
RSP: 0018:ffffc9000546eb08 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffffffff8e7e52e0 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8def5d4b RDI: ffffffff8c1c2500
RBP: ffff8880369abd80 R08: 00000000c5b8ddf3 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000246 R14: ffff8880369ac960 R15: 0000000000000002
__get_obj_cgroup_from_memcg+0x10a/0x290 mm/memcontrol.c:2887
get_obj_cgroup_from_memcg mm/memcontrol.c:2901 [inline]
charge_memcg+0x4d/0x210 mm/memcontrol.c:5012
__mem_cgroup_charge+0x2b/0x1c0 mm/memcontrol.c:5032
mem_cgroup_charge include/linux/memcontrol.h:644 [inline]
shmem_alloc_and_add_folio+0x451/0xd40 mm/shmem.c:1985
shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2564
shmem_get_folio mm/shmem.c:2670 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3303
generic_perform_write+0x292/0xa40 mm/filemap.c:4325
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3478
__kernel_write_iter+0x2ac/0x920 fs/read_write.c:621
dump_emit_page fs/coredump.c:1304 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1378
elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2109
coredump_write fs/coredump.c:1053 [inline]
do_coredump fs/coredump.c:1132 [inline]
vfs_coredump+0x29a0/0x5770 fs/coredump.c:1206
get_signal+0x1f2a/0x21e0 kernel/signal.c:3022
arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:252 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:323 [inline]
irqentry_exit+0x403/0x790 kernel/entry/common.c:162
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x2000000000
Code: Unable to access opcode bytes at 0x1fffffffd6.
RSP: 002b:000000000000000a EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f30f7616090 RCX: 00007f30f739cdd9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000020003b46
RBP: 00007f30f7432d69 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f30f7616128 R14: 00007f30f7616090 R15: 00007fff949aa098
----------------
Code disassembly (best guess), 3 bytes skipped:
0: ff 65 0f jmp *0xf(%rbp)
3: c1 15 f1 15 83 08 83 rcll $0x83,0x88315f1(%rip) # 0x88315fb
a: fa cli
b: 01 8b 44 24 04 75 add %ecx,0x75042444(%rbx)
11: 2d 9c 5a 80 e6 sub $0xe6805a9c,%eax
16: 02 75 47 add 0x47(%rbp),%dh
19: 41 f7 c5 00 02 00 00 test $0x200,%r13d
20: 74 01 je 0x23
22: fb sti
23: 48 83 c4 08 add $0x8,%rsp
* 27: 5b pop %rbx <-- trapping instruction
28: 5d pop %rbp
29: 41 5c pop %r12
2b: 41 5d pop %r13
2d: 41 5e pop %r14
2f: 41 5f pop %r15
31: c3 ret
32: cc int3
33: cc int3
34: cc int3
35: cc int3
36: e9 57 39 03 00 jmp 0x33992
3b: 31 c0 xor %eax,%eax