loop3: detected capacity change from 0 to 2048 EXT4-fs error (device loop3): ext4_xattr_ibody_get:669: inode #18: comm syz-executor.3: corrupted in-inode xattr: bad magic number in in-inode xattr ================================================================== BUG: KASAN: slab-out-of-bounds in get_max_inline_xattr_value_size+0x33d/0x510 fs/ext4/inline.c:63 Read of size 4 at addr ffff88801e285088 by task syz-executor.3/23588 CPU: 1 PID: 23588 Comm: syz-executor.3 Not tainted 6.3.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 get_max_inline_xattr_value_size+0x33d/0x510 fs/ext4/inline.c:63 ext4_get_max_inline_size+0x141/0x200 fs/ext4/inline.c:113 ext4_prepare_inline_data+0x87/0x1d0 fs/ext4/inline.c:393 ext4_da_write_inline_data_begin+0x208/0xe40 fs/ext4/inline.c:931 ext4_da_write_begin+0x4da/0x960 fs/ext4/inode.c:3064 generic_perform_write+0x300/0x5e0 mm/filemap.c:3926 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:289 ext4_file_write_iter+0x1d6/0x1930 do_iter_write+0x6ea/0xc50 fs/read_write.c:861 iter_file_splice_write+0x843/0xfe0 fs/splice.c:778 do_splice_from fs/splice.c:856 [inline] direct_splice_actor+0xe7/0x1c0 fs/splice.c:1022 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:977 do_splice_direct+0x283/0x3d0 fs/splice.c:1065 do_sendfile+0x620/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f80b968c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f80ba35b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f80b97abf80 RCX: 00007f80b968c0f9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f80b96e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3099c59f R14: 00007f80ba35b300 R15: 0000000000022000 Allocated by task 7041: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0xb8/0x230 mm/slab_common.c:974 kmalloc_array_node include/linux/slab.h:697 [inline] kcalloc_node include/linux/slab.h:702 [inline] memcg_alloc_slab_cgroups+0x81/0x120 mm/memcontrol.c:2899 memcg_slab_post_alloc_hook mm/slab.h:546 [inline] slab_post_alloc_hook+0xe3/0x3a0 mm/slab.h:777 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] alloc_buffer_head+0x2d/0x2a0 fs/buffer.c:2947 alloc_page_buffers+0x32d/0x950 fs/buffer.c:872 create_empty_buffers+0x3e/0x7e0 fs/buffer.c:1586 create_page_buffers+0x1d2/0x4c0 fs/buffer.c:1703 block_read_full_folio+0x242/0x1000 fs/buffer.c:2299 filemap_read_folio+0x19d/0x7a0 mm/filemap.c:2424 do_read_cache_folio+0x2ee/0x820 mm/filemap.c:3683 do_read_cache_page+0x32/0x230 mm/filemap.c:3749 read_mapping_page include/linux/pagemap.h:769 [inline] dir_get_page fs/minix/dir.c:76 [inline] minix_find_entry+0x1b7/0x530 fs/minix/dir.c:176 minix_inode_by_name+0x9e/0x240 fs/minix/dir.c:460 minix_lookup+0xc5/0x150 fs/minix/namei.c:30 __lookup_hash+0x117/0x240 fs/namei.c:1602 filename_create+0x291/0x530 fs/namei.c:3809 do_linkat+0x1d5/0x9e0 fs/namei.c:4577 __do_sys_link fs/namei.c:4627 [inline] __se_sys_link fs/namei.c:4625 [inline] __x64_sys_link+0x86/0x90 fs/namei.c:4625 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801e285000 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of allocated 136-byte region [ffff88801e285000, ffff88801e285088) The buggy address belongs to the physical page: page:ffffea000078a140 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801e285400 pfn:0x1e285 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012441a00 ffffea0000a718d0 ffffea0000a3df90 raw: ffff88801e285400 0000000000100005 00000001ffffffff 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 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 7041, tgid 7025 (syz-executor.3), ts 284909830140, free_ts 278484651706 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page+0x59/0x160 mm/slub.c:1853 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node+0xa7/0x230 mm/slab_common.c:974 kmalloc_array_node include/linux/slab.h:697 [inline] kcalloc_node include/linux/slab.h:702 [inline] memcg_alloc_slab_cgroups+0x81/0x120 mm/memcontrol.c:2899 memcg_slab_post_alloc_hook mm/slab.h:546 [inline] slab_post_alloc_hook+0xe3/0x3a0 mm/slab.h:777 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] alloc_buffer_head+0x2d/0x2a0 fs/buffer.c:2947 alloc_page_buffers+0x32d/0x950 fs/buffer.c:872 create_empty_buffers+0x3e/0x7e0 fs/buffer.c:1586 create_page_buffers+0x1d2/0x4c0 fs/buffer.c:1703 block_read_full_folio+0x242/0x1000 fs/buffer.c:2299 filemap_read_folio+0x19d/0x7a0 mm/filemap.c:2424 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare mm/page_alloc.c:1504 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3483 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] alloc_buffer_head+0x2d/0x2a0 fs/buffer.c:2947 alloc_page_buffers+0x32d/0x950 fs/buffer.c:872 create_empty_buffers+0x3e/0x7e0 fs/buffer.c:1586 create_page_buffers+0x1d2/0x4c0 fs/buffer.c:1703 block_read_full_folio+0x242/0x1000 fs/buffer.c:2299 filemap_read_folio+0x19d/0x7a0 mm/filemap.c:2424 do_read_cache_folio+0x2ee/0x820 mm/filemap.c:3683 do_read_cache_page+0x32/0x230 mm/filemap.c:3749 read_mapping_page include/linux/pagemap.h:769 [inline] dir_get_page fs/minix/dir.c:76 [inline] minix_find_entry+0x1b7/0x530 fs/minix/dir.c:176 Memory state around the buggy address: ffff88801e284f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801e285000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801e285080: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801e285100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801e285180: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================