loop0: rw=0, sector=6491536, nr_sectors = 2 limit=128
Buffer I/O error on dev loop0, logical block 3245768, async page read
==================================================================
BUG: KASAN: use-after-free in sysv_new_inode+0xd28/0xebc fs/sysv/ialloc.c:153
Read of size 2 at addr ffff0000dd5571ce by task syz.0.325/8397

CPU: 0 UID: 0 PID: 8397 Comm: syz.0.325 Not tainted 6.14.0-syzkaller-gd6b13dbd03b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x198/0x550 mm/kasan/report.c:521
 kasan_report+0xd8/0x138 mm/kasan/report.c:634
 __asan_report_load2_noabort+0x20/0x2c mm/kasan/report_generic.c:379
 sysv_new_inode+0xd28/0xebc fs/sysv/ialloc.c:153
 sysv_mknod+0x5c/0x100 fs/sysv/namei.c:53
 sysv_create+0x38/0x4c fs/sysv/namei.c:67
 vfs_create+0x21c/0x36c fs/namei.c:3350
 do_mknodat+0x3cc/0x56c fs/namei.c:4241
 __do_sys_mknodat fs/namei.c:4269 [inline]
 __se_sys_mknodat fs/namei.c:4266 [inline]
 __arm64_sys_mknodat+0xac/0xc8 fs/namei.c:4266
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xf9b pfn:0x11d557
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000f9b 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000dd557080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000dd557100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000dd557180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff0000dd557200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000dd557280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
syz.0.325: attempt to access beyond end of device
loop0: rw=0, sector=6491536, nr_sectors = 2 limit=128
Buffer I/O error on dev loop0, logical block 3245768, async page read