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
==================================================================
BUG: KASAN: use-after-free in sysv_new_inode+0xd74/0xeec fs/sysv/ialloc.c:153
Read of size 2 at addr ffff0000e8c7e1ce by task syz.2.18/4160

CPU: 1 PID: 4160 Comm: syz.2.18 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_load2_noabort+0x44/0x50 mm/kasan/report_generic.c:307
 sysv_new_inode+0xd74/0xeec 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+0x2cc/0x434 fs/namei.c:3162
 do_mknodat+0x314/0x694 fs/namei.c:3994
 __do_sys_mknodat fs/namei.c:4022 [inline]
 __se_sys_mknodat fs/namei.c:4019 [inline]
 __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4019
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:000000004a016c2d refcount:0 mapcount:-128 mapping:0000000000000000 index:0x100 pfn:0x128c7e
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc00037bf108 fffffc0003795c88 0000000000000000
raw: 0000000000000100 0000000000000001 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e8c7e080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e8c7e100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000e8c7e180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                              ^
 ffff0000e8c7e200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e8c7e280: 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