loop0: detected capacity change from 0 to 1024 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2848: Unable to expand inode 15. Delete some EAs or run e2fsck. syz.0.0 uses obsolete (PF_INET,SOCK_PACKET) loop0: detected capacity change from 1024 to 64 ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1751 Read of size 18446744073709551600 at addr ffff88804cf242d0 by task syz.0.0/5359 CPU: 0 UID: 0 PID: 5359 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 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_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1751 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2263 ext4_destroy_inline_data_nolock+0x214/0x5b0 fs/ext4/inline.c:463 ext4_convert_inline_data_to_extent+0x540/0xdd0 fs/ext4/inline.c:613 ext4_write_begin+0x382/0x19a0 fs/ext4/inode.c:1302 generic_perform_write+0x2c5/0x900 mm/filemap.c:4175 ext4_buffered_write_iter+0xce/0x3a0 fs/ext4/file.c:299 ext4_file_write_iter+0x298/0x1bc0 fs/ext4/file.c:-1 aio_write+0x532/0x7a0 fs/aio.c:1634 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x78b/0x1310 fs/aio.c:2053 __do_sys_io_submit fs/aio.c:2112 [inline] __se_sys_io_submit+0x185/0x2f0 fs/aio.c:2082 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5ab2f8eec9 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:00007f5ab3ebd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f5ab31e5fa0 RCX: 00007f5ab2f8eec9 RDX: 00002000000000c0 RSI: 0000000000000001 RDI: 00007f5ab3e7b000 RBP: 00007f5ab3011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5ab31e6038 R14: 00007f5ab31e5fa0 R15: 00007ffde4550488 The buggy address belongs to the physical page: page: refcount:3 mapcount:0 mapping:ffff8880008dcd80 index:0x2 pfn:0x4cf24 memcg:ffff888030488d00 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff18000004214(referenced|dirty|workingset|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff18000004214 0000000000000000 dead000000000122 ffff8880008dcd80 raw: 0000000000000002 ffff8880440e5000 00000003ffffffff ffff888030488d00 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_MOVABLE|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL), pid 5359, tgid 5358 (syz.0.0), ts 76026639545, free_ts 75988069966 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2517 filemap_alloc_folio_noprof+0xdf/0x470 mm/filemap.c:1007 __filemap_get_folio+0x3f2/0xaf0 mm/filemap.c:1981 grow_dev_folio fs/buffer.c:1050 [inline] grow_buffers fs/buffer.c:1116 [inline] __getblk_slow fs/buffer.c:1134 [inline] bdev_getblk+0x1ad/0x660 fs/buffer.c:1461 __getblk include/linux/buffer_head.h:380 [inline] sb_getblk include/linux/buffer_head.h:386 [inline] __ext4_get_inode_loc+0x561/0x1040 fs/ext4/inode.c:4866 ext4_get_inode_loc+0x81/0xf0 fs/ext4/inode.c:4994 ext4_xattr_ibody_get+0x111/0x510 fs/ext4/xattr.c:644 ext4_xattr_get+0x123/0x6a0 fs/ext4/xattr.c:705 vfs_getxattr_alloc+0x42e/0x580 fs/xattr.c:393 ima_read_xattr+0x38/0x60 security/integrity/ima/ima_appraise.c:230 process_measurement+0xfd7/0x1a40 security/integrity/ima/ima_main.c:386 page last free pid 5359 tgid 5358 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] free_unref_folios+0xdbd/0x1520 mm/page_alloc.c:2952 folios_put_refs+0x559/0x640 mm/swap.c:999 folios_put include/linux/mm.h:1419 [inline] folio_batch_move_lru+0x3b8/0x460 mm/swap.c:179 lru_add_drain_cpu+0x119/0x880 mm/swap.c:648 lru_add_drain+0x122/0x3e0 mm/swap.c:737 __folio_batch_release+0x48/0x90 mm/swap.c:1056 folio_batch_release include/linux/pagevec.h:101 [inline] writeback_get_folio mm/page-writeback.c:2459 [inline] writeback_iter+0x6cd/0x12a0 mm/page-writeback.c:2562 blkdev_writepages+0xe9/0x170 block/fops.c:483 do_writepages+0x32b/0x550 mm/page-writeback.c:2634 filemap_fdatawrite_wbc mm/filemap.c:386 [inline] __filemap_fdatawrite_range mm/filemap.c:419 [inline] filemap_write_and_wait_range+0x21f/0x320 mm/filemap.c:691 loop_set_status+0x249/0xd60 drivers/block/loop.c:1243 lo_ioctl+0x9f6/0x1c10 drivers/block/loop.c:-1 blkdev_ioctl+0x5a5/0x6d0 block/ioctl.c:705 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88804cf24180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804cf24200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88804cf24280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88804cf24300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804cf24380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================