loop0: detected capacity change from 0 to 32768 loop0: detected capacity change from 32768 to 0 syz.0.0: attempt to access beyond end of device loop0: rw=1, sector=368, nr_sectors = 8 limit=0 metapage_write_end_io: I/O error ================================================================== BUG: KASAN: slab-use-after-free in release_metapage+0x567/0x960 fs/jfs/jfs_metapage.c:777 Read of size 8 at addr ffff888052d0a668 by task syz.0.0/5319 CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.13.0-rc1-syzkaller-00182-gb8f52214c61a #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 release_metapage+0x567/0x960 fs/jfs/jfs_metapage.c:777 write_metapage fs/jfs/jfs_metapage.h:75 [inline] flush_metapage fs/jfs/jfs_metapage.h:81 [inline] ea_write+0x6a3/0xe60 fs/jfs/xattr.c:280 ea_put fs/jfs/xattr.c:621 [inline] __jfs_setxattr+0x8a9/0x1190 fs/jfs/xattr.c:787 __jfs_xattr_set+0xf9/0x180 fs/jfs/xattr.c:936 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x2af/0x430 fs/xattr.c:665 path_setxattrat+0x440/0x510 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 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: 0033:0x7f64ae97fed9 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:00007f64af79e058 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007f64aeb45fa0 RCX: 00007f64ae97fed9 RDX: 0000000020000380 RSI: 0000000020000000 RDI: 0000000020000340 RBP: 00007f64ae9f3cc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000841 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f64aeb45fa0 R15: 00007ffdf4653a88 Allocated by task 5319: 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_noprof+0x1d9/0x380 mm/slub.c:4160 mempool_alloc_noprof+0x197/0x5a0 mm/mempool.c:402 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline] __get_metapage+0x4ed/0xef0 fs/jfs/jfs_metapage.c:652 ea_write+0x637/0xe60 fs/jfs/xattr.c:256 ea_put fs/jfs/xattr.c:621 [inline] __jfs_setxattr+0x8a9/0x1190 fs/jfs/xattr.c:787 __jfs_xattr_set+0xf9/0x180 fs/jfs/xattr.c:936 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x2af/0x430 fs/xattr.c:665 path_setxattrat+0x440/0x510 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 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 Freed by task 5320: 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:582 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:2338 [inline] slab_free mm/slub.c:4598 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4700 free_metapage fs/jfs/jfs_metapage.c:197 [inline] metapage_release_folio+0x412/0x540 fs/jfs/jfs_metapage.c:552 folio_invalidate mm/truncate.c:126 [inline] truncate_cleanup_folio+0x11a/0x320 mm/truncate.c:146 truncate_inode_folio mm/truncate.c:161 [inline] truncate_inode_pages_range+0xb46/0xfc0 mm/truncate.c:383 jfs_reconfigure+0x5ef/0x9d0 fs/jfs/super.c:406 reconfigure_super+0x43a/0x870 fs/super.c:1083 vfs_cmd_reconfigure fs/fsopen.c:262 [inline] vfs_fsconfig_locked fs/fsopen.c:291 [inline] __do_sys_fsconfig fs/fsopen.c:467 [inline] __se_sys_fsconfig+0xb74/0xf60 fs/fsopen.c:344 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 ffff888052d0a5d0 which belongs to the cache jfs_mp of size 184 The buggy address is located 152 bytes inside of freed 184-byte region [ffff888052d0a5d0, ffff888052d0a688) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x52d0a flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff888032fec640 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5320, tgid 5318 (syz.0.0), ts 71089297873, 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+0x365c/0x37a0 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_noprof+0x268/0x380 mm/slub.c:4160 mempool_alloc_noprof+0x197/0x5a0 mm/mempool.c:402 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline] __get_metapage+0x4ed/0xef0 fs/jfs/jfs_metapage.c:652 diNewExt+0xacf/0x37e0 fs/jfs/jfs_imap.c:2275 diAllocExt fs/jfs/jfs_imap.c:1952 [inline] diAllocAG+0xbec/0x1e50 fs/jfs/jfs_imap.c:1669 diAlloc+0x1d2/0x1630 fs/jfs/jfs_imap.c:1590 ialloc+0x8f/0x900 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x1c5/0xba0 fs/jfs/namei.c:225 page_owner free stack trace missing Memory state around the buggy address: ffff888052d0a500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888052d0a580: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb >ffff888052d0a600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888052d0a680: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888052d0a700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================