loop0: detected capacity change from 0 to 32768 bcachefs (/dev/loop0): error validating superblock: Invalid superblock section clean: entry type btree_keys overruns end of section clean (size 2912): flags: 0 journal_seq: 10 usage: type=inodes v=8 usage: type=key_version v=0 usage: type=reserved v=0 usage: type=reserved v=0 usage: type=reserved v=0 usage: type=reserved v=0 data_usage: btree: 1/1 [0]=2816 data_usage: journal: 1/1 [0]=0 data_usage: user: 1/1 [0]=16 dev_usage: dev=0 free: buckets=83 sectors=0 fragmented=0 sb: buckets=25 sectors=6152 fragmented=248 journal: buckets=8 sectors=2048 fragmented=0 btree: buckets=11 sectors=2816 fragmented=0 user: buckets=1 sectors=16 fragmented=240 cached: buckets=0 sectors=0 fragmented=13565952 parity: buckets=0 sectors=0 fragmented=0 stripe: buckets=0 sectors=0 fragmented=0 need_gc_gens: buckets=0 sectors=0 fragmented=0 need_discard: buckets=0 sectors=0 fragmented=0 clock: read=0 clock: write=1280 btree_root: btree=extents level=0 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: bcachefs: bch2_fs_get_tree() error: invalid_sb_clean loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in dtCompare fs/jfs/jfs_dtree.c:3345 [inline] BUG: KASAN: slab-out-of-bounds in dtSearch+0x1683/0x21b0 fs/jfs/jfs_dtree.c:650 Read of size 1 at addr ffff88805304c030 by task syz.0.0/5332 CPU: 0 UID: 0 PID: 5332 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-09014-gd6084bb815c4 #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 dtCompare fs/jfs/jfs_dtree.c:3345 [inline] dtSearch+0x1683/0x21b0 fs/jfs/jfs_dtree.c:650 jfs_lookup+0x155/0x380 fs/jfs/namei.c:1461 lookup_one_qstr_excl+0x12e/0x360 fs/namei.c:1697 filename_create+0x224/0x3c0 fs/namei.c:4140 do_mknodat+0x184/0x4d0 fs/namei.c:4272 __do_sys_mknodat fs/namei.c:4313 [inline] __se_sys_mknodat fs/namei.c:4310 [inline] __x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4310 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f69aa18eb69 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:00007f69ab011038 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 RAX: ffffffffffffffda RBX: 00007f69aa3b5fa0 RCX: 00007f69aa18eb69 RDX: f0b9ce0949ff22d3 RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007f69aa211df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000701 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f69aa3b5fa0 R15: 00007ffc1a2f4a98 Allocated by task 5332: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4179 [inline] slab_alloc_node mm/slub.c:4228 [inline] kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4247 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x67/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 ialloc+0x4c/0x8f0 fs/jfs/jfs_inode.c:48 jfs_create+0x18d/0xa80 fs/jfs/namei.c:92 lookup_open fs/namei.c:3708 [inline] open_last_lookups fs/namei.c:3807 [inline] path_openat+0x14f1/0x3830 fs/namei.c:4043 do_filp_open+0x1fa/0x410 fs/namei.c:4073 do_sys_openat2+0x121/0x1c0 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805304b750 which belongs to the cache jfs_ip of size 2232 The buggy address is located 40 bytes to the right of allocated 2232-byte region [ffff88805304b750, ffff88805304c008) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x53048 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888042f34f01 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801fbe3b40 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888042f34f01 head: 04fff00000000040 ffff88801fbe3b40 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888042f34f01 head: 04fff00000000003 ffffea00014c1201 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5332, tgid 5331 (syz.0.0), ts 75465411531, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2486 [inline] allocate_slab+0x8a/0x370 mm/slub.c:2654 new_slab mm/slub.c:2708 [inline] ___slab_alloc+0xbeb/0x1410 mm/slub.c:3890 __slab_alloc mm/slub.c:3980 [inline] __slab_alloc_node mm/slub.c:4055 [inline] slab_alloc_node mm/slub.c:4216 [inline] kmem_cache_alloc_lru_noprof+0x288/0x3d0 mm/slub.c:4247 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x67/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 jfs_fill_super+0x569/0xd80 fs/jfs/super.c:511 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692 vfs_get_tree+0x8f/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4321 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 page_owner free stack trace missing Memory state around the buggy address: ffff88805304bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805304bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805304c000: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805304c080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805304c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================