==================================================================
BUG: KASAN: out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: out-of-bounds in atomic_dec include/linux/atomic/atomic-instrumented.h:592 [inline]
BUG: KASAN: out-of-bounds in put_bh include/linux/buffer_head.h:302 [inline]
BUG: KASAN: out-of-bounds in end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161
Write of size 4 at addr ffffc9000bfef660 by task syz.4.2173/10453
CPU: 0 UID: 0 PID: 10453 Comm: syz.4.2173 Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #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_address_description mm/kasan/report.c:378 [inline]
print_report+0x169/0x550 mm/kasan/report.c:489
kasan_report+0x143/0x180 mm/kasan/report.c:602
kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_dec include/linux/atomic/atomic-instrumented.h:592 [inline]
put_bh include/linux/buffer_head.h:302 [inline]
end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161
end_bio_bh_io_sync+0xc1/0x120 fs/buffer.c:2766
blk_update_request+0x5e5/0x1160 block/blk-mq.c:981
blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1143
blk_complete_reqs block/blk-mq.c:1218 [inline]
blk_done_softirq+0x102/0x150 block/blk-mq.c:1223
handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:in_lock_functions+0x0/0x30 kernel/locking/spinlock.c:408
Code: c1 0f 8c 73 ff ff ff 48 c7 c7 00 4e 2e 96 e8 a7 d8 89 00 e9 62 ff ff ff 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 c7 c0 20 66 cb 8b 48 39 c7 0f 93 c0 48 c7 c1 0a a0
RSP: 0018:ffffc9000333f788 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8bcba001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000333f8f0 R08: ffffffff81e2d029 R09: 1ffff1100bac3e21
R10: dffffc0000000000 R11: ffffed100bac3e22 R12: ffffea0001542b00
R13: 0000000000000001 R14: 0000000000000000 R15: dffffc0000000000
get_lock_parent_ip include/linux/ftrace.h:1002 [inline]
preempt_latency_start kernel/sched/core.c:5829 [inline]
preempt_count_add+0xa1/0x190 kernel/sched/core.c:5854
__raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock+0x12/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
shmem_recalc_inode mm/shmem.c:442 [inline]
shmem_alloc_and_add_folio+0xca8/0x1080 mm/shmem.c:1895
shmem_get_folio_gfp+0x621/0x1840 mm/shmem.c:2357
shmem_get_folio mm/shmem.c:2463 [inline]
shmem_write_begin+0x165/0x350 mm/shmem.c:3119
generic_perform_write+0x348/0x990 mm/filemap.c:4055
shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3295
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0xaed/0xd30 fs/read_write.c:679
ksys_write+0x18f/0x2b0 fs/read_write.c:731
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: 0033:0x7f6011f847df
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f6012cd6df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000200000 RCX: 00007f6011f847df
RDX: 0000000000200000 RSI: 00007f6008c00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000001f812
R10: 0000000000003ffc R11: 0000000000000293 R12: 0000000000000003
R13: 00007f6012cd6ef0 R14: 00007f6012cd6eb0 R15: 00007f6008c00000
The buggy address belongs to the virtual mapping at
[ffffc9000bfe8000, ffffc9000bff1000) created by:
copy_process+0x5d1/0x3d50 kernel/fork.c:2224
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x7e pfn:0x335bc
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 000000000000007e 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 10425, tgid 10425 (syz.1.2160), ts 657538684780, free_ts 657509536894
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+0x365c/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
vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
__vmalloc_area_node mm/vmalloc.c:3669 [inline]
__vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3846
alloc_thread_stack_node kernel/fork.c:314 [inline]
dup_task_struct+0x444/0x8c0 kernel/fork.c:1116
copy_process+0x5d1/0x3d50 kernel/fork.c:2224
kernel_clone+0x226/0x8e0 kernel/fork.c:2806
__do_sys_clone3 kernel/fork.c:3110 [inline]
__se_sys_clone3+0x2d8/0x360 kernel/fork.c:3089
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
page last free pid 7906 tgid 7906 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_folios+0xe39/0x18b0 mm/page_alloc.c:2706
folios_put_refs+0x76c/0x860 mm/swap.c:962
folio_batch_release include/linux/pagevec.h:101 [inline]
truncate_inode_pages_range+0x460/0x10e0 mm/truncate.c:330
kill_bdev block/bdev.c:91 [inline]
blkdev_flush_mapping+0x108/0x270 block/bdev.c:670
blkdev_put_whole block/bdev.c:677 [inline]
bdev_release+0x460/0x700 block/bdev.c:1102
blkdev_release+0x15/0x20 block/fops.c:635
__fput+0x23e/0xa50 fs/file_table.c:450
__do_sys_close fs/open.c:1554 [inline]
__se_sys_close fs/open.c:1539 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1539
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
Memory state around the buggy address:
ffffc9000bfef500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000bfef580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000bfef600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
^
ffffc9000bfef680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000bfef700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 0f 8c 73 ff ff ff jl 0xffffff79
6: 48 c7 c7 00 4e 2e 96 mov $0xffffffff962e4e00,%rdi
d: e8 a7 d8 89 00 call 0x89d8b9
12: e9 62 ff ff ff jmp 0xffffff79
17: 66 90 xchg %ax,%ax
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 90 nop
26: 90 nop
27: 90 nop
28: 90 nop
* 29: f3 0f 1e fa endbr64 <-- trapping instruction
2d: 48 c7 c0 20 66 cb 8b mov $0xffffffff8bcb6620,%rax
34: 48 39 c7 cmp %rax,%rdi
37: 0f 93 c0 setae %al
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: c1 0a a0 rorl $0xa0,(%rdx)