loop0: detected capacity change from 0 to 4096
ntfs3(loop0): Failed to load $UpCase (-22).
==================================================================
BUG: KASAN: stack-out-of-bounds in find_lock_entries+0x11b/0xbb0 mm/filemap.c:2115
Read of size 8 at addr ffffc9000ea2f9df by task syz.0.1571/8754
CPU: 0 UID: 0 PID: 8754 Comm: syz.0.1571 Not tainted 6.14.0-rc3-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__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
find_lock_entries+0x11b/0xbb0 mm/filemap.c:2115
shmem_undo_range+0x2d4/0x1820 mm/shmem.c:1094
shmem_truncate_range mm/shmem.c:1224 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1352
evict+0x4e8/0x9a0 fs/inode.c:796
__dentry_kill+0x20d/0x630 fs/dcache.c:643
dput+0x19f/0x2b0 fs/dcache.c:885
__fput+0x60b/0x9f0 fs/file_table.c:472
task_work_run+0x24f/0x310 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f30af38ba4a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24
RSP: 002b:00007f30b0137e50 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 00007f30af38ba4a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000016
R13: 00007f30b0137eb0 R14: 000000000001f768 R15: 0000400000000400
</TASK>
The buggy address belongs to stack of task syz.0.1571/8754
and is located at offset 671 in frame:
shmem_undo_range+0x0/0x1820
This frame has 3 objects:
[32, 288) 'fbatch'
[352, 600) 'indices'
[672, 680) 'index'
The buggy address belongs to the virtual mapping at
[ffffc9000ea28000, ffffc9000ea31000) created by:
copy_process+0x5d1/0x3cf0 kernel/fork.c:2233
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x56b3a
memcg:ffff88804873ec02
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88804873ec02
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 8740, tgid 8740 (syz.0.1565), ts 249137916445, free_ts 248484849769
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline]
alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2361
vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
__vmalloc_area_node mm/vmalloc.c:3669 [inline]
__vmalloc_node_range_noprof+0x9c6/0x1380 mm/vmalloc.c:3846
alloc_thread_stack_node kernel/fork.c:314 [inline]
dup_task_struct+0x444/0x8c0 kernel/fork.c:1127
copy_process+0x5d1/0x3cf0 kernel/fork.c:2233
kernel_clone+0x226/0x8e0 kernel/fork.c:2815
__do_sys_clone3 kernel/fork.c:3119 [inline]
__se_sys_clone3+0x2ee/0x380 kernel/fork.c:3098
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 5310 tgid 5310 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
pagetable_free include/linux/mm.h:2917 [inline]
pagetable_dtor_free include/linux/mm.h:3015 [inline]
__tlb_remove_table+0x33c/0x420 include/asm-generic/tlb.h:216
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x76/0xf0 mm/mmu_gather.c:282
rcu_do_batch kernel/rcu/tree.c:2546 [inline]
rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802
handle_softirqs+0x2d4/0x9b0 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
Memory state around the buggy address:
ffffc9000ea2f880: f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000ea2f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000ea2f980: 00 00 00 f2 f2 f2 f2 f2 f2 f2 f2 f2 00 f3 f3 f3
^
ffffc9000ea2fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000ea2fa80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2
==================================================================