loop0: detected capacity change from 0 to 128
VFS: Found a Xenix FS (block size = 1024) on device loop0
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 19578 Comm: syz.0.5225 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #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
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3853 [inline]
 validate_chain kernel/locking/lockdep.c:3874 [inline]
 __lock_acquire+0x2070/0x7904 kernel/locking/lockdep.c:5228
 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
 fs_reclaim_acquire+0xb0/0x120 mm/page_alloc.c:3870
 might_alloc include/linux/sched/mm.h:318 [inline]
 slab_pre_alloc_hook mm/slub.c:4066 [inline]
 slab_alloc_node mm/slub.c:4144 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_noprof+0xcc/0x54c mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 tomoyo_realpath_from_path+0xc8/0x4cc security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x1ec/0x5e4 security/tomoyo/file.c:723
 tomoyo_path_mknod+0x168/0x1b0 security/tomoyo/tomoyo.c:252
 security_path_mknod+0x17c/0x3a0 security/security.c:1899
 may_o_create fs/namei.c:3470 [inline]
 lookup_open fs/namei.c:3614 [inline]
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0xaf0/0x2b1c fs/namei.c:3986
 do_filp_open+0x1e8/0x404 fs/namei.c:4016
 do_sys_openat2+0x124/0x1b8 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1454
 __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
==================================================================
BUG: KASAN: slab-out-of-bounds in sysv_new_inode+0xd28/0xebc fs/sysv/ialloc.c:153
Read of size 2 at addr ffff0000ddc041ce by task syz.0.5225/19578

CPU: 0 UID: 0 PID: 19578 Comm: syz.0.5225 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #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
 lookup_open fs/namei.c:3651 [inline]
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x13ec/0x2b1c fs/namei.c:3986
 do_filp_open+0x1e8/0x404 fs/namei.c:4016
 do_sys_openat2+0x124/0x1b8 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1454
 __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

Allocated by task 6444:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:562
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x258/0x414 mm/slub.c:4183
 sock_alloc_inode+0x2c/0xcc net/socket.c:309
 alloc_inode+0x68/0x19c fs/inode.c:336
 new_inode_pseudo+0x20/0x30 fs/inode.c:1174
 sock_alloc net/socket.c:622 [inline]
 __sock_create+0x134/0x908 net/socket.c:1512
 sock_create_kern+0x4c/0x64 net/socket.c:1624
 inet_ctl_sock_create+0xc0/0x220 net/ipv4/af_inet.c:1637
 sctp_ctl_sock_init net/sctp/protocol.c:857 [inline]
 sctp_ctrlsock_init+0x4c/0xdc net/sctp/protocol.c:1482
 ops_init+0x310/0x544 net/core/net_namespace.c:138
 setup_net+0x270/0x8c0 net/core/net_namespace.c:362
 copy_net_ns+0x2ac/0x4ac net/core/net_namespace.c:516
 create_new_namespaces+0x344/0x614 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x108/0x158 kernel/nsproxy.c:228
 ksys_unshare+0x484/0x858 kernel/fork.c:3342
 __do_sys_unshare kernel/fork.c:3413 [inline]
 __se_sys_unshare kernel/fork.c:3411 [inline]
 __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3411
 __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 object at ffff0000ddc03c00
 which belongs to the cache sock_inode_cache of size 1408
The buggy address is located 78 bytes to the right of
 allocated 1408-byte region [ffff0000ddc03c00, ffff0000ddc04180)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000ddc05a00 pfn:0x11dc00
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000cd68e301
flags: 0x5ffc00000000240(workingset|head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000240 ffff0000c1be7dc0 fffffdffc3c6cc10 ffff0000c1be8888
raw: ffff0000ddc05a00 0000000000150010 00000000f5000000 ffff0000cd68e301
head: 05ffc00000000240 ffff0000c1be7dc0 fffffdffc3c6cc10 ffff0000c1be8888
head: ffff0000ddc05a00 0000000000150010 00000000f5000000 ffff0000cd68e301
head: 05ffc00000000003 fffffdffc3770001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ddc04080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ddc04100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000ddc04180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff0000ddc04200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ddc04280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
syz.0.5225: attempt to access beyond end of device
loop0: rw=2049, sector=6491536, nr_sectors = 2 limit=128