==================================================================
BUG: KASAN: vmalloc-out-of-bounds in vrealloc_noprof+0x132/0x320 mm/vmalloc.c:4093
Write of size 4064 at addr ffffc90024f51020 by task syz.1.1060/9084
CPU: 0 UID: 0 PID: 9084 Comm: syz.1.1060 Not tainted 6.15.0-rc5-syzkaller-00207-g1a33418a69cc #0 PREEMPT(full)
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+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
__asan_memset+0x23/0x50 mm/kasan/shadow.c:84
vrealloc_noprof+0x132/0x320 mm/vmalloc.c:4093
push_insn_history+0x2ae/0x6c0 kernel/bpf/verifier.c:3874
do_check kernel/bpf/verifier.c:19450 [inline]
do_check_common+0xbd3/0xc2a0 kernel/bpf/verifier.c:22776
do_check_main kernel/bpf/verifier.c:22867 [inline]
bpf_check+0x7f51/0xb460 kernel/bpf/verifier.c:24033
bpf_prog_load+0xe41/0x2490 kernel/bpf/syscall.c:2971
__sys_bpf+0x433c/0x4d80 kernel/bpf/syscall.c:5834
__do_sys_bpf kernel/bpf/syscall.c:5941 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5939 [inline]
__ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5939
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf70be579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f50ae55c EFLAGS: 00000296 ORIG_RAX: 0000000000000165
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000080000700
RDX: 0000000000000094 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
The buggy address belongs to the virtual mapping at
[ffffc90024ed1000, ffffc90024f53000) created by:
kvrealloc_noprof+0x7d/0xd0 mm/slub.c:5109
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x216 pfn:0x2ae2f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000216 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 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN), pid 9084, tgid 9083 (syz.1.1060), ts 148055246400, free_ts 146626336001
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688
__alloc_pages_slowpath mm/page_alloc.c:4509 [inline]
__alloc_frozen_pages_noprof+0x5a8/0x23a0 mm/page_alloc.c:4983
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301
alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline]
alloc_pages_noprof+0x131/0x390 mm/mempolicy.c:2392
vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
__vmalloc_area_node mm/vmalloc.c:3669 [inline]
__vmalloc_node_range_noprof+0x732/0x1540 mm/vmalloc.c:3844
__kvmalloc_node_noprof+0x2ff/0x600 mm/slub.c:5034
kvrealloc_noprof+0x7d/0xd0 mm/slub.c:5109
push_insn_history+0x2ae/0x6c0 kernel/bpf/verifier.c:3874
check_stack_write_fixed_off kernel/bpf/verifier.c:5117 [inline]
check_stack_write kernel/bpf/verifier.c:5556 [inline]
check_mem_access+0x3edc/0x5fb0 kernel/bpf/verifier.c:7572
check_store_reg+0x2ef/0x470 kernel/bpf/verifier.c:7715
do_check kernel/bpf/verifier.c:19522 [inline]
do_check_common+0x4618/0xc2a0 kernel/bpf/verifier.c:22776
do_check_main kernel/bpf/verifier.c:22867 [inline]
bpf_check+0x7f51/0xb460 kernel/bpf/verifier.c:24033
bpf_prog_load+0xe41/0x2490 kernel/bpf/syscall.c:2971
__sys_bpf+0x433c/0x4d80 kernel/bpf/syscall.c:5834
__do_sys_bpf kernel/bpf/syscall.c:5941 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5939 [inline]
__ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5939
page last free pid 9059 tgid 9058 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
free_unref_folios+0x999/0x1630 mm/page_alloc.c:2782
folios_put_refs+0x56f/0x740 mm/swap.c:992
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x58f/0x1150 mm/shmem.c:1125
shmem_truncate_range mm/shmem.c:1237 [inline]
shmem_evict_inode+0x3a1/0xbe0 mm/shmem.c:1365
evict+0x3e3/0x920 fs/inode.c:810
iput_final fs/inode.c:1898 [inline]
iput fs/inode.c:1924 [inline]
iput+0x521/0x880 fs/inode.c:1910
dentry_unlink_inode+0x29c/0x480 fs/dcache.c:457
__dentry_kill+0x1d0/0x600 fs/dcache.c:660
dput.part.0+0x4b1/0x9b0 fs/dcache.c:902
dput+0x1f/0x30 fs/dcache.c:892
__fput+0x51c/0xb70 fs/file_table.c:473
task_work_run+0x14d/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xafb/0x2c30 kernel/exit.c:953
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
get_signal+0x2673/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7a0 arch/x86/kernel/signal.c:337
Memory state around the buggy address:
ffffc90024f50f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90024f50f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90024f51000: 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
^
ffffc90024f51080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90024f51100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi