================================================================== BUG: KASAN: double-free or invalid-free in kfree+0x19e/0x220 mm/slub.c:4574 CPU: 0 PID: 25544 Comm: syz-executor.5 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 kasan_report_invalid_free+0x6b/0xa0 mm/kasan/report.c:370 __kasan_kfree_large+0x82/0x90 mm/kasan/common.c:398 kasan_kfree_large include/linux/kasan.h:201 [inline] kfree_hook mm/slub.c:1687 [inline] free_nonslab_page+0x3c/0xc0 mm/slub.c:3551 kfree+0x19e/0x220 mm/slub.c:4574 kvfree+0x35/0x40 mm/util.c:658 ext4_xattr_move_to_block fs/ext4/xattr.c:2628 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0x1063/0x1bc0 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x303/0x3f0 fs/ext4/inode.c:5859 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5902 [inline] __ext4_mark_inode_dirty+0x4af/0x7a0 fs/ext4/inode.c:5980 ext4_inline_data_truncate+0x54a/0xd00 fs/ext4/inline.c:2013 ext4_truncate+0x337/0xfa0 fs/ext4/inode.c:4232 ext4_process_orphan+0x1d3/0x2f0 fs/ext4/orphan.c:339 ext4_orphan_cleanup+0x93d/0x10a0 fs/ext4/orphan.c:474 ext4_fill_super+0x8d67/0x9680 fs/ext4/super.c:4963 mount_bdev+0x281/0x3b0 fs/super.c:1378 ext4_mount+0x34/0x40 fs/ext4/super.c:6567 legacy_get_tree+0xf1/0x190 fs/fs_context.c:610 vfs_get_tree+0x88/0x290 fs/super.c:1508 do_new_mount+0x28b/0xac0 fs/namespace.c:2994 path_mount+0x671/0x1070 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3522 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbe279d16ca Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbe26742f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000480 RCX: 00007fbe279d16ca RDX: 0000000020000040 RSI: 0000000020000000 RDI: 00007fbe26742fe0 RBP: 00007fbe26743020 R08: 00007fbe26743020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000040 R13: 0000000020000000 R14: 00007fbe26742fe0 R15: 0000000020000c80 The buggy address belongs to the page: page:ffffea00048c47c0 refcount:2 mapcount:0 mapping:ffff888109125358 index:0x2 pfn:0x12311f memcg:ffff8881083a0000 aops:def_blk_aops ino:700005 flags: 0x400000000000203a(referenced|dirty|lru|active|private|zone=1) raw: 400000000000203a ffffea0005bf7988 ffff88810138f030 ffff888109125358 raw: 0000000000000002 ffff88816c150f18 00000002ffffffff ffff8881083a0000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x108c40(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL), pid 25544, ts 3107408246519, free_ts 3107397351935 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2502 prep_new_page mm/page_alloc.c:2508 [inline] get_page_from_freelist+0x2c14/0x2cf0 mm/page_alloc.c:4291 __alloc_pages+0x386/0x7b0 mm/page_alloc.c:5569 __alloc_pages_node include/linux/gfp.h:591 [inline] alloc_pages_node include/linux/gfp.h:605 [inline] alloc_pages include/linux/gfp.h:618 [inline] __page_cache_alloc include/linux/pagemap.h:305 [inline] pagecache_get_page+0xb18/0xeb0 mm/filemap.c:1940 find_or_create_page include/linux/pagemap.h:418 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x21e/0x7c0 fs/buffer.c:1336 sb_getblk_gfp include/linux/buffer_head.h:368 [inline] ext4_sb_breadahead_unmovable+0x6a/0xe0 fs/ext4/super.c:238 __ext4_get_inode_loc+0xaaf/0xcd0 fs/ext4/inode.c:4430 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4460 [inline] __ext4_iget+0x467/0x3e40 fs/ext4/inode.c:4665 ext4_fill_super+0x7570/0x9680 fs/ext4/super.c:4829 mount_bdev+0x281/0x3b0 fs/super.c:1378 ext4_mount+0x34/0x40 fs/ext4/super.c:6567 legacy_get_tree+0xf1/0x190 fs/fs_context.c:610 vfs_get_tree+0x88/0x290 fs/super.c:1508 do_new_mount+0x28b/0xac0 fs/namespace.c:2994 path_mount+0x671/0x1070 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3522 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1370 [inline] free_pcp_prepare mm/page_alloc.c:1442 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3441 free_unref_page+0xac/0x2c0 mm/page_alloc.c:3521 free_the_page mm/page_alloc.c:711 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5645 free_pages+0x7c/0x90 mm/page_alloc.c:5656 tlb_batch_list_free mm/mmu_gather.c:61 [inline] tlb_finish_mmu+0x253/0x320 mm/mmu_gather.c:341 unmap_region+0x304/0x350 mm/mmap.c:2688 __do_munmap+0x1421/0x1a90 mm/mmap.c:2920 __vm_munmap+0x166/0x2a0 mm/mmap.c:2943 __do_sys_munmap mm/mmap.c:2969 [inline] __se_sys_munmap mm/mmap.c:2965 [inline] __x64_sys_munmap+0x6b/0x80 mm/mmap.c:2965 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff88812311f180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812311f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88812311f280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88812311f300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812311f380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs (loop5): 1 truncate cleaned up EXT4-fs (loop5): mounted filesystem without journal. Opts: noload,minixdf,debug_want_extra_isize=0x000000000000003e,lazytime,i_version,quota,,errors=continue. Quota mode: writeback.