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BUG: KASAN: slab-out-of-bounds in __roll_back_blkaddrs fs/f2fs/file.c:1001 [inline]
BUG: KASAN: slab-out-of-bounds in __exchange_data_block+0x2dbc/0x30a0 fs/f2fs/file.c:1137
Read of size 4 at addr ffff888097e3d4e0 by task syz-executor.1/10455

CPU: 0 PID: 10455 Comm: syz-executor.1 Not tainted 4.14.305-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:251
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:350
 kasan_report mm/kasan/report.c:408 [inline]
 __asan_report_load4_noabort+0x68/0x70 mm/kasan/report.c:428
 __roll_back_blkaddrs fs/f2fs/file.c:1001 [inline]
 __exchange_data_block+0x2dbc/0x30a0 fs/f2fs/file.c:1137
 f2fs_insert_range fs/f2fs/file.c:1404 [inline]
 f2fs_fallocate+0x1368/0x26f0 fs/f2fs/file.c:1501
 vfs_fallocate+0x346/0x790 fs/open.c:319
 SYSC_fallocate fs/open.c:342 [inline]
 SyS_fallocate+0x4a/0x80 fs/open.c:336
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f54bad230f9
RSP: 002b:00007f54b9295168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f54bae42f80 RCX: 00007f54bad230f9
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000005
RBP: 00007f54bad7eae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000ff8000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff73aa0e7f R14: 00007f54b9295300 R15: 0000000000022000

Allocated by task 10455:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node+0x4c/0x70 mm/slab.c:3689
 kmalloc_node include/linux/slab.h:530 [inline]
 kvmalloc_node+0x84/0xc0 mm/util.c:432
 kvmalloc include/linux/mm.h:531 [inline]
 kvzalloc include/linux/mm.h:539 [inline]
 __exchange_data_block+0x132/0x30a0 fs/f2fs/file.c:1111
 f2fs_insert_range fs/f2fs/file.c:1404 [inline]
 f2fs_fallocate+0x1368/0x26f0 fs/f2fs/file.c:1501
 vfs_fallocate+0x346/0x790 fs/open.c:319
 SYSC_fallocate fs/open.c:342 [inline]
 SyS_fallocate+0x4a/0x80 fs/open.c:336
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff888097e39540
 which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 16288 bytes inside of
 16384-byte region [ffff888097e39540, ffff888097e3d540)
The buggy address belongs to the page:
page:ffffea00025f8e00 count:1 mapcount:0 mapping:ffff888097e39540 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff888097e39540 0000000000000000 0000000100000001
raw: ffffea000236dc20 ffff88813fe64c48 ffff88813fe65200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888097e3d380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888097e3d400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888097e3d480: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
                                                       ^
 ffff888097e3d500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888097e3d580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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