=============================
[ BUG: Invalid wait context ]
6.13.0-rc6-syzkaller-00006-g5428dc1906dd #0 Not tainted
-----------------------------
syz.0.4188/14726 is trying to lock:
ffff8880b863a930 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff8880b863a930 (batched_entropy_u8.lock){..-.}-{3:3}, at: get_random_u8+0x1a0/0xaa0 drivers/char/random.c:551
other info that might help us debug this:
context-{2:2}
4 locks held by syz.0.4188/14726:
#0: ffff88802e76e0e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:144 [inline]
#0: ffff88802e76e0e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x165/0xc20 mm/mmap.c:1656
#1: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#1: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: ___pte_offset_map+0x82/0x380 mm/pgtable-generic.c:287
#2: ffff88803372cdf8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#2: ffff88803372cdf8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: __pte_offset_map_lock+0x1ba/0x300 mm/pgtable-generic.c:402
#3: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#3: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: page_ext_get+0x20/0x2a0 mm/page_ext.c:525
stack backtrace:
CPU: 0 UID: 0 PID: 14726 Comm: syz.0.4188 Not tainted 6.13.0-rc6-syzkaller-00006-g5428dc1906dd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline]
check_wait_context kernel/locking/lockdep.c:4898 [inline]
__lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
get_random_u8+0x1bd/0xaa0 drivers/char/random.c:551
get_random_u32_below include/linux/random.h:78 [inline]
kfence_guarded_alloc+0x9c/0xcd0 mm/kfence/core.c:421
__kfence_alloc+0x344/0x370 mm/kfence/core.c:1136
kfence_alloc include/linux/kfence.h:129 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__kmalloc_cache_noprof+0x2dd/0x390 mm/slub.c:4324
kmalloc_noprof include/linux/slab.h:901 [inline]
add_stack_record_to_list mm/page_owner.c:172 [inline]
inc_stack_record_count mm/page_owner.c:214 [inline]
__set_page_owner+0x55f/0x800 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3476
__alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
stack_depot_save_flags+0x72d/0x940 lib/stackdepot.c:627
kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
task_work_add+0xd9/0x490 kernel/task_work.c:77
__run_posix_cpu_timers kernel/time/posix-cpu-timers.c:1223 [inline]
run_posix_cpu_timers+0x6ac/0x810 kernel/time/posix-cpu-timers.c:1422
tick_sched_handle kernel/time/tick-sched.c:276 [inline]
tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x551/0xd30 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lookup_page_ext mm/page_ext.c:254 [inline]
RIP: 0010:page_ext_get+0x1a5/0x2a0 mm/page_ext.c:526
Code: 42 80 3c 38 00 74 08 48 89 df e8 c6 7b f4 ff 4c 8b 3b e8 6e ff 74 ff 89 c3 31 ff 89 c6 e8 53 a7 90 ff 85 db 0f 84 ed 00 00 00 06 a3 90 ff 44 89 fb 83 e3 01 31 ff 48 89 de e8 d6 a7 90 ff 4d
RSP: 0018:ffffc900034474f0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000080000001
RDX: ffff888053909e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffffffff820ed0bd R09: 1ffffffff284e310
R10: dffffc0000000000 R11: fffffbfff284e311 R12: 0000000000076db4
R13: 0000000000000000 R14: ffffffff820ecf40 R15: ffff88801c500000
page_table_check_clear+0x4b/0x550 mm/page_table_check.c:74
get_and_clear_full_ptes include/linux/pgtable.h:705 [inline]
zap_present_folio_ptes mm/memory.c:1502 [inline]
zap_present_ptes mm/memory.c:1585 [inline]
zap_pte_range mm/memory.c:1627 [inline]
zap_pmd_range mm/memory.c:1753 [inline]
zap_pud_range mm/memory.c:1782 [inline]
zap_p4d_range mm/memory.c:1803 [inline]
unmap_page_range+0x2c2e/0x4040 mm/memory.c:1824
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1914
exit_mmap+0x275/0xc20 mm/mmap.c:1672
__mmput+0x115/0x3b0 kernel/fork.c:1348
exit_mm+0x220/0x310 kernel/exit.c:570
do_exit+0x9ad/0x28e0 kernel/exit.c:925
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
__do_sys_exit_group kernel/exit.c:1098 [inline]
__se_sys_exit_group kernel/exit.c:1096 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f6dc2385d29
Code: Unable to access opcode bytes at 0x7f6dc2385cff.
RSP: 002b:00007fff44182c48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6dc2385d29
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff44182c9c R08: 00007fff44182d2f R09: 000000000005d2fb
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000032
R13: 000000000005d2fb R14: 00007fff44182cf0 R15: 00007fff44182cf0
----------------
Code disassembly (best guess):
0: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
5: 74 08 je 0xf
7: 48 89 df mov %rbx,%rdi
a: e8 c6 7b f4 ff call 0xfff47bd5
f: 4c 8b 3b mov (%rbx),%r15
12: e8 6e ff 74 ff call 0xff74ff85
17: 89 c3 mov %eax,%ebx
19: 31 ff xor %edi,%edi
1b: 89 c6 mov %eax,%esi
1d: e8 53 a7 90 ff call 0xff90a775
22: 85 db test %ebx,%ebx
24: 0f 84 ed 00 00 00 je 0x117
* 2a: e8 06 a3 90 ff call 0xff90a335 <-- trapping instruction
2f: 44 89 fb mov %r15d,%ebx
32: 83 e3 01 and $0x1,%ebx
35: 31 ff xor %edi,%edi
37: 48 89 de mov %rbx,%rsi
3a: e8 d6 a7 90 ff call 0xff90a815
3f: 4d rex.WRB