Buffer I/O error on dev loop0, logical block 45, lost sync page write EXT4-fs error (device loop0): ext4_splice_branch:472: inode #18: block 45: comm syz.0.0: IO error syncing itable block EXT4-fs error (device loop0): ext4_check_bdev_write_error:228: comm syz.0.0: Error while async write back metadata syz.0.0: attempt to access beyond end of device loop0: rw=2051, sector=306, nr_sectors = 2 limit=64 EXT4-fs (loop0): discard request in group:0 block:152 count:1 failed with -5 EXT4-fs error (device loop0) in ext4_mb_clear_bb:6657: IO failure EXT4-fs error (device loop0): mb_free_blocks:2017: group 0, inode 18: block 153:freeing already freed block (bit 152); block bitmap corrupt. EXT4-fs (loop0): pa ffff888044a19000: logic 112, phys. 149, len 12 EXT4-fs error (device loop0): ext4_mb_release_inode_pa:5434: group 0, free 8, pa_free 7 syz.0.0: attempt to access beyond end of device loop0: rw=14337, sector=90, nr_sectors = 2 limit=64 Buffer I/O error on dev loop0, logical block 45, lost sync page write EXT4-fs error (device loop0): ext4_free_data:978: inode #18: block 45: comm syz.0.0: IO error syncing itable block EXT4-fs error (device loop0): ext4_check_bdev_write_error:228: comm syz.0.0: Error while async write back metadata syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=74, nr_sectors = 16 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 37) Buffer I/O error on device loop0, logical block 37 Buffer I/O error on device loop0, logical block 38 Buffer I/O error on device loop0, logical block 39 Buffer I/O error on device loop0, logical block 40 Buffer I/O error on device loop0, logical block 41 Buffer I/O error on device loop0, logical block 42 Buffer I/O error on device loop0, logical block 43 Buffer I/O error on device loop0, logical block 44 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=98, nr_sectors = 8 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 49) Buffer I/O error on device loop0, logical block 49 Buffer I/O error on device loop0, logical block 50 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=114, nr_sectors = 8 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 57) syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=106, nr_sectors = 8 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 53) syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=426, nr_sectors = 8 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 213) syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=178, nr_sectors = 8 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 89) syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=250, nr_sectors = 8 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 125) EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 161) EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 185) EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 232) ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1751 Read of size 18446744073709551600 at addr ffff88804d36e6b8 by task syz.0.0/5353 CPU: 0 UID: 0 PID: 5353 Comm: syz.0.0 Not tainted 6.17.0-rc1-syzkaller-00004-g53e760d89498 #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+0x2c2/0x900 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+0x535/0x7a0 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: 0033:0x7f7ee738ebe9 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:00007f7ee81d0038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f7ee75b5fa0 RCX: 00007f7ee738ebe9 RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f7ee8186000 RBP: 00007f7ee7411e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7ee75b6038 R14: 00007f7ee75b5fa0 R15: 00007ffdd16f75a8 The buggy address belongs to the physical page: page: refcount:2 mapcount:0 mapping:ffff888031c4cd80 index:0x2 pfn:0x4d36e memcg:ffff888030ad0d00 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff38000004234(referenced|dirty|lru|workingset|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff38000004234 ffffea00010e19c8 ffff888030ae09e0 ffff888031c4cd80 raw: 0000000000000002 ffff888044a1a000 00000002ffffffff ffff888030ad0d00 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 5353, tgid 5352 (syz.0.0), ts 74545166906, free_ts 74496416972 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 fs/ext4/inode.c:4994 [inline] ext4_reserve_inode_write+0x18b/0x360 fs/ext4/inode.c:6323 __ext4_mark_inode_dirty+0x15b/0x700 fs/ext4/inode.c:6501 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6538 __mark_inode_dirty+0x2ce/0xdf0 fs/fs-writeback.c:2527 mark_inode_dirty_sync include/linux/fs.h:2614 [inline] dquot_free_space include/linux/quotaops.h:380 [inline] dquot_free_block include/linux/quotaops.h:390 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6640 [inline] ext4_free_blocks+0x1340/0x1bf0 fs/ext4/mballoc.c:6760 ext4_splice_branch+0x438/0x590 fs/ext4/indirect.c:496 page last free pid 5328 tgid 5328 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:997 folio_batch_release include/linux/pagevec.h:101 [inline] shmem_undo_range+0x49e/0x14b0 mm/shmem.c:1157 shmem_truncate_range mm/shmem.c:1269 [inline] shmem_evict_inode+0x272/0xa70 mm/shmem.c:1397 evict+0x504/0x9c0 fs/inode.c:810 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 do_renameat2+0x6de/0xa80 fs/namei.c:5280 __do_sys_rename fs/namei.c:5325 [inline] __se_sys_rename fs/namei.c:5323 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5323 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: ffff88804d36e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804d36e600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88804d36e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88804d36e700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804d36e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================