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. ======================================================= JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. (syz.0.0,5325,0):ocfs2_check_set_options:1244 ERROR: Invalid heartbeat mount options loop0: detected capacity change from 32768 to 32767 OCFS2: ERROR (device loop0): int ocfs2_validate_dx_root(struct super_block *, struct buffer_head *): Dir Index Root # 74 has bad signature XDIR01 On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: File system is now read-only. (syz.0.0,5325,0):ocfs2_find_entry_dx:1037 ERROR: status = -30 ================================================================== BUG: KASAN: use-after-free in ocfs2_dx_dir_lookup_rec+0x1eb/0x7f0 fs/ocfs2/dir.c:813 Read of size 4 at addr ffff888019fa92c0 by task syz.0.0/5325 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #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: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 ocfs2_dx_dir_lookup_rec+0x1eb/0x7f0 fs/ocfs2/dir.c:813 ocfs2_dx_dir_lookup+0xdb/0x520 fs/ocfs2/dir.c:868 ocfs2_dx_dir_search fs/ocfs2/dir.c:928 [inline] ocfs2_find_entry_dx fs/ocfs2/dir.c:1042 [inline] ocfs2_find_entry+0x1004/0x2000 fs/ocfs2/dir.c:1079 ocfs2_check_dir_for_entry+0x14c/0x3f0 fs/ocfs2/dir.c:2048 ocfs2_mknod+0x697/0x2050 fs/ocfs2/namei.c:291 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x14f4/0x3830 fs/namei.c:4131 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0f25f8efc9 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:00007f0f26d6b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f0f261e5fa0 RCX: 00007f0f25f8efc9 RDX: 0000000000000000 RSI: 0000000000145142 RDI: 0000200000000240 RBP: 00007f0f26011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0f261e6038 R14: 00007f0f261e5fa0 R15: 00007ffc127bcff8 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7fffffffd pfn:0x19fa9 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000100 dead000000000122 0000000000000000 raw: 00000007fffffffd 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|__GFP_COMP), pid 4722, tgid 4722 (udevd), ts 27194998198, free_ts 74357895562 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 folio_alloc_mpol_noprof mm/mempolicy.c:2435 [inline] vma_alloc_folio_noprof+0xe4/0x200 mm/mempolicy.c:2470 folio_prealloc+0x30/0x180 mm/memory.c:-1 alloc_anon_folio mm/memory.c:5125 [inline] do_anonymous_page mm/memory.c:5182 [inline] do_pte_missing mm/memory.c:4359 [inline] handle_pte_fault mm/memory.c:6177 [inline] __handle_mm_fault+0x2a8b/0x5400 mm/memory.c:6318 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487 do_user_addr_fault+0x764/0x1380 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 79 tgid 79 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:2963 shrink_folio_list+0x295e/0x4c70 mm/vmscan.c:1569 evict_folios+0x471e/0x57c0 mm/vmscan.c:4745 try_to_shrink_lruvec+0x8a3/0xb50 mm/vmscan.c:4908 shrink_one+0x21b/0x7c0 mm/vmscan.c:4953 shrink_many mm/vmscan.c:5016 [inline] lru_gen_shrink_node mm/vmscan.c:5094 [inline] shrink_node+0x315d/0x3780 mm/vmscan.c:6081 kswapd_shrink_node mm/vmscan.c:6941 [inline] balance_pgdat mm/vmscan.c:7124 [inline] kswapd+0x147c/0x2800 mm/vmscan.c:7389 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888019fa9180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888019fa9200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888019fa9280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888019fa9300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888019fa9380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================