loop0: detected capacity change from 0 to 32768 (syz.0.0,5323,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC. (syz.0.0,5323,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC. (syz.0.0,5323,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xcfdff595, computed 0xefed4a20. Applying ECC. JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ================================================================== BUG: KASAN: slab-use-after-free in ocfs2_lock_global_qf+0xb8/0x2b0 fs/ocfs2/quota_global.c:303 Read of size 8 at addr ffff8880442db828 by task syz.0.0/5323 CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.12.0-rc7-syzkaller-00189-ge8bdb3c8be08 #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:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ocfs2_lock_global_qf+0xb8/0x2b0 fs/ocfs2/quota_global.c:303 ocfs2_get_next_id+0x233/0x760 fs/ocfs2/quota_global.c:900 dquot_get_next_dqblk+0x73/0x3a0 fs/quota/dquot.c:2701 quota_getnextquota+0x2c5/0x6c0 fs/quota/quota.c:250 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl+0x2c4/0xa30 fs/quota/quota.c:917 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: 0033:0x7feca6b7e719 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:00007feca797a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007feca6d35f80 RCX: 00007feca6b7e719 RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffff80000901 RBP: 00007feca6bf175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007feca6d35f80 R15: 00007ffccbe521f8 Allocated by task 5323: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4295 kmalloc_noprof include/linux/slab.h:878 [inline] ocfs2_local_read_info+0x1ee/0x19f0 fs/ocfs2/quota_local.c:699 dquot_load_quota_sb+0x762/0xbb0 fs/quota/dquot.c:2458 dquot_load_quota_inode+0x320/0x600 fs/quota/dquot.c:2495 ocfs2_enable_quotas+0x225/0x450 fs/ocfs2/super.c:926 ocfs2_fill_super+0x4ca1/0x5760 fs/ocfs2/super.c:1141 mount_bdev+0x20a/0x2d0 fs/super.c:1693 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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 5323: 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:579 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:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kfree+0x1a0/0x440 mm/slub.c:4727 ocfs2_local_free_info+0x81f/0x9a0 fs/ocfs2/quota_local.c:869 dquot_disable+0x1160/0x1cd0 fs/quota/dquot.c:2303 dquot_suspend include/linux/quotaops.h:85 [inline] ocfs2_susp_quotas+0x24b/0x340 fs/ocfs2/super.c:892 ocfs2_remount+0x576/0xc30 fs/ocfs2/super.c:647 reconfigure_super+0x445/0x880 fs/super.c:1083 do_remount fs/namespace.c:3047 [inline] path_mount+0xc22/0xfa0 fs/namespace.c:3826 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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 ffff8880442db800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 40 bytes inside of freed 1024-byte region [ffff8880442db800, ffff8880442dbc00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x442d8 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801ac41dc0 0000000000000000 0000000000000001 raw: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 04fff00000000040 ffff88801ac41dc0 0000000000000000 0000000000000001 head: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 04fff00000000002 ffffea000110b601 ffffffffffffffff 0000000000000000 head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5305, tgid 5305 (syz-executor), ts 65030631028, free_ts 65021715098 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:4750 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x140 mm/slub.c:2412 allocate_slab+0x5a/0x2f0 mm/slub.c:2578 new_slab mm/slub.c:2631 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818 __slab_alloc+0x58/0xa0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] __do_kmalloc_node mm/slub.c:4263 [inline] __kmalloc_noprof+0x25a/0x400 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] load_elf_phdrs fs/binfmt_elf.c:526 [inline] load_elf_binary+0x2eb/0x2710 fs/binfmt_elf.c:855 search_binary_handler fs/exec.c:1752 [inline] exec_binprm fs/exec.c:1794 [inline] bprm_execve+0xaf8/0x1770 fs/exec.c:1845 do_execveat_common+0x55f/0x6f0 fs/exec.c:1952 do_execve fs/exec.c:2026 [inline] __do_sys_execve fs/exec.c:2102 [inline] __se_sys_execve fs/exec.c:2097 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2097 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 page last free pid 5295 tgid 5295 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xdf9/0x1140 mm/page_alloc.c:2657 stack_depot_save_flags+0x6f6/0x830 lib/stackdepot.c:666 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x51/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 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:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kmem_cache_free+0x1a2/0x420 mm/slub.c:4681 ext4_mb_new_blocks+0x2c50/0x4e30 fs/ext4/mballoc.c:6262 ext4_ext_map_blocks+0x1beb/0x7e40 fs/ext4/extents.c:4379 ext4_map_create_blocks fs/ext4/inode.c:516 [inline] ext4_map_blocks+0x8c2/0x1960 fs/ext4/inode.c:702 ext4_alloc_file_blocks+0x3fe/0xd50 fs/ext4/extents.c:4520 ext4_zero_range+0x929/0xd80 fs/ext4/extents.c:4683 ext4_fallocate+0x54a/0x1ea0 fs/ext4/extents.c:4782 vfs_fallocate+0x569/0x6e0 fs/open.c:333 ksys_fallocate fs/open.c:356 [inline] __do_sys_fallocate fs/open.c:364 [inline] __se_sys_fallocate fs/open.c:362 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:362 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 Memory state around the buggy address: ffff8880442db700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880442db780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880442db800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880442db880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880442db900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================