loop0: detected capacity change from 0 to 128 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= hpfs: filesystem error: invalid number of hotfixes: 2066844986, used: 2066844985; going on - but anything won't be destroyed because it's read-only hpfs: filesystem error: improperly stopped hpfs: filesystem error: warning: spare dnodes used, try chkdsk hpfs: Proceeding, but your filesystem could be corrupted if you delete files or directories hpfs: You really don't want any checks? You are crazy... hpfs: hpfs_map_sector(): read error hpfs: code page support is disabled ================================================================== BUG: KASAN: use-after-free in strcmp+0x6b/0xc0 lib/string.c:265 Read of size 1 at addr ffff888013848c85 by task syz.0.0/5332 CPU: 0 UID: 0 PID: 5332 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 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 strcmp+0x6b/0xc0 lib/string.c:265 hpfs_get_ea+0x137/0xeb0 fs/hpfs/ea.c:139 hpfs_read_inode+0x1a9/0x1060 fs/hpfs/inode.c:63 hpfs_fill_super+0x1275/0x1fa0 fs/hpfs/super.c:652 get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1872 vfs_get_tree+0x92/0x2a0 fs/super.c:1932 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6ac9b9f3ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6acaa96e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f6acaa96ea0 RCX: 00007f6ac9b9f3ca RDX: 000020000000a000 RSI: 0000200000009ec0 RDI: 00007f6acaa96e60 RBP: 000020000000a000 R08: 00007f6acaa96ea0 R09: 0000000003a00041 R10: 0000000003a00041 R11: 0000000000000246 R12: 0000200000009ec0 R13: 00007f6acaa96e60 R14: 0000000000009e22 R15: 0000200000000000 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13848 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f0(buddy) raw: 00fff00000000000 ffffea00004e5d08 ffffea00004e1588 0000000000000000 raw: 0000000000000000 0000000000000001 00000000f0000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_MOVABLE|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 4684, tgid 4684 (start-stop-daem), ts 59796947869 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436 alloc_pages_mpol+0x21e/0x390 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0xb1/0x2b0 mm/mempolicy.c:2577 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2587 filemap_alloc_folio_noprof+0x111/0x460 mm/filemap.c:1019 ractl_alloc_folio mm/readahead.c:200 [inline] page_cache_ra_unbounded+0x390/0x9d0 mm/readahead.c:288 do_page_cache_ra mm/readahead.c:348 [inline] page_cache_ra_order+0xb47/0xee0 mm/readahead.c:558 filemap_get_pages+0x4a9/0x1ec0 mm/filemap.c:2714 filemap_read+0x426/0x11e0 mm/filemap.c:2824 ext4_file_read_iter+0x553/0xad0 fs/ext4/file.c:-1 __kernel_read+0x4ca/0x960 fs/read_write.c:532 prepare_binprm fs/exec.c:1717 [inline] search_binary_handler fs/exec.c:1764 [inline] exec_binprm fs/exec.c:1810 [inline] bprm_execve+0x862/0x1590 fs/exec.c:1866 do_execveat_common+0x4f4/0x670 fs/exec.c:1964 __do_sys_execve fs/exec.c:2037 [inline] __se_sys_execve fs/exec.c:2031 [inline] __x64_sys_execve+0x97/0xc0 fs/exec.c:2031 page last free pid 77 tgid 77 ts 115753763009 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] free_unref_folios+0xdc2/0x14e0 mm/page_alloc.c:3022 shrink_folio_list+0x2be2/0x5250 mm/vmscan.c:1511 evict_folios+0x3055/0x3fb0 mm/vmscan.c:4910 try_to_shrink_lruvec+0xe3b/0x1340 mm/vmscan.c:5076 shrink_one+0x233/0x730 mm/vmscan.c:5117 shrink_many mm/vmscan.c:5180 [inline] lru_gen_shrink_node mm/vmscan.c:5258 [inline] shrink_node+0x35d0/0x3e30 mm/vmscan.c:6247 kswapd_shrink_node mm/vmscan.c:7101 [inline] balance_pgdat mm/vmscan.c:7279 [inline] kswapd+0x185e/0x32c0 mm/vmscan.c:7555 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888013848b80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888013848c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888013848c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888013848d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888013848d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================