loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in addressPXD fs/jfs/jfs_types.h:80 [inline] BUG: KASAN: slab-out-of-bounds in dtReadFirst+0x512/0xc50 fs/jfs/jfs_dtree.c:3107 Read of size 4 at addr ffff88804522c028 by task syz.0.0/5333 CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-10681-g65ae975e97d5 #0 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 lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 addressPXD fs/jfs/jfs_types.h:80 [inline] dtReadFirst+0x512/0xc50 fs/jfs/jfs_dtree.c:3107 jfs_readdir+0x7ef/0x3c50 fs/jfs/jfs_dtree.c:2820 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:65 iterate_dir+0x571/0x800 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:403 [inline] __se_sys_getdents64+0x1e2/0x4b0 fs/readdir.c:389 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f64d2580809 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:00007f64d334b058 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007f64d2745fa0 RCX: 00007f64d2580809 RDX: 0000000000000099 RSI: 0000000020000400 RDI: 000000000000000c RBP: 00007f64d25f393e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f64d2745fa0 R15: 00007ffea2dc4c48 Allocated by task 5333: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 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_lru_noprof+0x1dd/0x390 mm/slub.c:4172 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 ialloc+0x4c/0x900 fs/jfs/jfs_inode.c:48 jfs_create+0x1be/0xbb0 fs/jfs/namei.c:92 lookup_open fs/namei.c:3649 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3984 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 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] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88804522b750 which belongs to the cache jfs_ip of size 2232 The buggy address is located 32 bytes to the right of allocated 2232-byte region [ffff88804522b750, ffff88804522c008) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x45228 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801f2ef3c0 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000001f5000000 0000000000000000 head: 04fff00000000040 ffff88801f2ef3c0 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000001f5000000 0000000000000000 head: 04fff00000000003 ffffea0001148a01 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 Reclaimable, gfp_mask 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 5333, tgid 5332 (syz.0.0), ts 59869982413, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x3649/0x3790 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x140 mm/slub.c:2408 allocate_slab+0x5a/0x2f0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_lru_noprof+0x26c/0x390 mm/slub.c:4172 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 jfs_fill_super+0x570/0xd90 fs/jfs/super.c:511 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 page_owner free stack trace missing Memory state around the buggy address: ffff88804522bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804522bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88804522c000: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88804522c080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804522c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================