ocfs2: Mounting device (7,6) 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+0x950/0x1e0c fs/ocfs2/suballoc.c:1982 Read of size 4 at addr ffff0000d5f00000 by task syz.6.361/8386 CPU: 0 UID: 0 PID: 8386 Comm: syz.6.361 Not tainted 6.13.0-rc2-syzkaller-gfac04efc5c79 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (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:378 [inline] print_report+0x198/0x538 mm/kasan/report.c:489 kasan_report+0xd8/0x138 mm/kasan/report.c:602 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline] ocfs2_claim_suballoc_bits+0x950/0x1e0c fs/ocfs2/suballoc.c:1982 ocfs2_claim_new_inode+0x2dc/0x7a8 fs/ocfs2/suballoc.c:2267 ocfs2_mknod_locked+0x134/0x2e4 fs/ocfs2/namei.c:635 ocfs2_mknod+0x10a0/0x2438 fs/ocfs2/namei.c:381 ocfs2_create+0x194/0x4d4 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x13e4/0x2b14 fs/namei.c:3984 do_filp_open+0x1e8/0x404 fs/namei.c:4014 do_sys_openat2+0x124/0x1b8 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1428 __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 6410: 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:568 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:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x254/0x410 mm/slub.c:4160 getname_flags+0xcc/0x4b4 fs/namei.c:139 getname fs/namei.c:223 [inline] __do_sys_renameat fs/namei.c:5265 [inline] __se_sys_renameat fs/namei.c:5262 [inline] __arm64_sys_renameat+0x98/0xdc fs/namei.c:5262 __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 Freed by task 6410: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x64/0x8c mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2338 [inline] slab_free mm/slub.c:4598 [inline] kmem_cache_free+0x198/0x554 mm/slub.c:4700 putname+0x130/0x184 fs/namei.c:296 do_renameat2+0xd98/0xe40 fs/namei.c:5250 __do_sys_renameat fs/namei.c:5265 [inline] __se_sys_renameat fs/namei.c:5262 [inline] __arm64_sys_renameat+0xc0/0xdc fs/namei.c:5262 __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 ffff0000d5f00000 which belongs to the cache names_cache of size 4096 The buggy address is located 0 bytes inside of freed 4096-byte region [ffff0000d5f00000, ffff0000d5f01000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x115f00 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c18958c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000070007 00000001f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c18958c0 dead000000000100 dead000000000122 head: 0000000000000000 0000000000070007 00000001f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc357c001 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d5efff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d5efff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d5f00000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d5f00080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000d5f00100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== grow_buffers: requested out-of-range block 18446744073709551615 for device loop6 (syz.6.361,8386,0):ocfs2_read_blocks:239 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_search_chain:1814 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_search_chain:1926 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_claim_suballoc_bits:1995 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_claim_suballoc_bits:2038 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_claim_new_inode:2273 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_claim_new_inode:2288 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_mknod_locked:639 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_mknod:385 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_mknod:502 ERROR: status = -12 (syz.6.361,8386,0):ocfs2_create:676 ERROR: status = -12