UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list
loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
==================================================================
BUG: KASAN: slab-use-after-free in ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline]
BUG: KASAN: slab-use-after-free in ocfs2_claim_suballoc_bits+0x10da/0x2570 fs/ocfs2/suballoc.c:1982
Read of size 4 at addr ffff888051a88000 by task syz.0.0/5323

CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-05877-g1a9239bb4253 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16e/0x5b0 mm/kasan/report.c:521
 kasan_report+0x143/0x180 mm/kasan/report.c:634
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline]
 ocfs2_claim_suballoc_bits+0x10da/0x2570 fs/ocfs2/suballoc.c:1982
 ocfs2_claim_new_inode+0x344/0x880 fs/ocfs2/suballoc.c:2267
 ocfs2_mknod_locked+0x17c/0x3b0 fs/ocfs2/namei.c:634
 ocfs2_mknod+0x17d8/0x2b30 fs/ocfs2/namei.c:381
 ocfs2_create+0x1ad/0x480 fs/ocfs2/namei.c:673
 vfs_create+0x23c/0x3d0 fs/namei.c:3363
 do_mknodat+0x407/0x600 fs/namei.c:4243
 __do_sys_mknod fs/namei.c:4276 [inline]
 __se_sys_mknod fs/namei.c:4274 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4274
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feb26b8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007feb278ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007feb26da5fa0 RCX: 00007feb26b8d169
RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007feb26c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007feb26da5fa0 R15: 00007ffc9d0f5908
 </TASK>

Allocated by task 5305:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x9d/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4318 [inline]
 __kvmalloc_node_noprof+0x329/0x5a0 mm/slub.c:5003
 seq_buf_alloc fs/seq_file.c:38 [inline]
 seq_read_iter+0x20b/0xda0 fs/seq_file.c:210
 new_sync_read fs/read_write.c:489 [inline]
 vfs_read+0x9a0/0xb90 fs/read_write.c:570
 ksys_read+0x19d/0x2d0 fs/read_write.c:713
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5305:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2376 [inline]
 slab_free mm/slub.c:4633 [inline]
 kfree+0x198/0x430 mm/slub.c:4832
 seq_release+0x54/0x70 fs/seq_file.c:355
 kernfs_fop_release+0x12d/0x190 fs/kernfs/file.c:766
 __fput+0x3e9/0x9f0 fs/file_table.c:465
 fput_close_sync+0x1ef/0x270 fs/file_table.c:570
 __do_sys_close fs/open.c:1581 [inline]
 __se_sys_close fs/open.c:1566 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1566
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888051a88000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 0 bytes inside of
 freed 4096-byte region [ffff888051a88000, ffff888051a89000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x51a88
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000040 ffff88801b04f500 ffffea000079f800 0000000000000003
raw: 0000000000000000 0000000080040004 00000000f5000000 0000000000000000
head: 04fff00000000040 ffff88801b04f500 ffffea000079f800 0000000000000003
head: 0000000000000000 0000000080040004 00000000f5000000 0000000000000000
head: 04fff00000000003 ffffea000146a201 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5305, tgid 5305 (udevd), ts 66398465110, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3695/0x37e0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x2c5/0x7b0 mm/page_alloc.c:4740
 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2446 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2610
 new_slab mm/slub.c:2663 [inline]
 ___slab_alloc+0xc3b/0x1500 mm/slub.c:3849
 __slab_alloc+0x58/0xa0 mm/slub.c:3939
 __slab_alloc_node mm/slub.c:4014 [inline]
 slab_alloc_node mm/slub.c:4175 [inline]
 __do_kmalloc_node mm/slub.c:4317 [inline]
 __kvmalloc_node_noprof+0x3f4/0x5a0 mm/slub.c:5003
 seq_buf_alloc fs/seq_file.c:38 [inline]
 seq_read_iter+0x20b/0xda0 fs/seq_file.c:210
 new_sync_read fs/read_write.c:489 [inline]
 vfs_read+0x9a0/0xb90 fs/read_write.c:570
 ksys_read+0x19d/0x2d0 fs/read_write.c:713
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888051a87f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888051a87f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888051a88000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888051a88080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888051a88100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================