Buffer I/O error on dev loop2, logical block 3245768, async page read
==================================================================
BUG: KASAN: use-after-free in sysv_new_inode+0xd54/0xec8 fs/sysv/ialloc.c:153
Read of size 2 at addr ffff0000f4e231ce by task syz.2.386/5958

CPU: 1 PID: 5958 Comm: syz.2.386 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x78/0x30c mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xec/0x15c mm/kasan/report.c:451
 __asan_report_load2_noabort+0x44/0x50 mm/kasan/report_generic.c:307
 sysv_new_inode+0xd54/0xec8 fs/sysv/ialloc.c:153
 sysv_mknod+0x5c/0x100 fs/sysv/namei.c:53
 sysv_create+0x38/0x4c fs/sysv/namei.c:67
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0x1144/0x26e4 fs/namei.c:3739
 do_filp_open+0x164/0x330 fs/namei.c:3769
 file_open_name fs/open.c:1198 [inline]
 filp_open+0x15c/0x1b8 fs/open.c:1218
 do_coredump+0x1b10/0x2240 fs/coredump.c:835
 get_signal+0x4f4/0x1340 kernel/signal.c:2886
 do_signal arch/arm64/kernel/signal.c:893 [inline]
 do_notify_resume+0x29c/0x3128 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_ia+0x158/0x2cc arch/arm64/kernel/entry-common.c:513
 el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:632
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:0000000074aaf4a6 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x134e23
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003796cc8 fffffc0003b601c8 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f4e23080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f4e23100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000f4e23180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff0000f4e23200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f4e23280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
attempt to access beyond end of device
loop2: rw=0, want=6491538, limit=128
Buffer I/O error on dev loop2, logical block 3245768, async page read