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; already mounted read-only hpfs: filesystem error: improperly stopped hpfs: filesystem error: warning: spare dnodes used, try chkdsk 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+0x6f/0xc0 lib/string.c:283 Read of size 1 at addr ffff88802311b8a6 by task syz.0.0/5345 CPU: 0 UID: 0 PID: 5345 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+0xe8/0x150 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 strcmp+0x6f/0xc0 lib/string.c:283 hpfs_get_ea+0x114/0xdb0 fs/hpfs/ea.c:139 hpfs_read_inode+0x19d/0x1010 fs/hpfs/inode.c:63 hpfs_fill_super+0x129d/0x2040 fs/hpfs/super.c:651 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2a0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3712 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3c82590f6a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3c83492e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3c83492ef0 RCX: 00007f3c82590f6a RDX: 000020000000a000 RSI: 0000200000009ec0 RDI: 00007f3c83492eb0 RBP: 000020000000a000 R08: 00007f3c83492ef0 R09: 0000000003200041 R10: 0000000003200041 R11: 0000000000000246 R12: 0000200000009ec0 R13: 00007f3c83492eb0 R14: 0000000000009e15 R15: 00002000000000c0 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1b8 pfn:0x2311b flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000100 dead000000000122 0000000000000000 raw: 00000000000001b8 0000000000000000 00000000ffffffff 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 4853, tgid 4853 (v4l_id), ts 72896253837, free_ts 124592559631 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846 prep_new_page mm/page_alloc.c:1854 [inline] get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2577 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2587 filemap_alloc_folio_noprof+0x107/0x470 mm/filemap.c:1013 ractl_alloc_folio mm/readahead.c:189 [inline] page_cache_ra_unbounded+0x34f/0x990 mm/readahead.c:275 do_sync_mmap_readahead+0x66a/0x870 mm/filemap.c:3400 filemap_fault+0x6ac/0x1290 mm/filemap.c:3549 __do_fault+0x138/0x390 mm/memory.c:5320 do_cow_fault mm/memory.c:5785 [inline] do_fault mm/memory.c:5891 [inline] do_pte_missing+0x554/0x3330 mm/memory.c:4401 handle_pte_fault mm/memory.c:6273 [inline] __handle_mm_fault mm/memory.c:6411 [inline] handle_mm_fault+0x1b26/0x32b0 mm/memory.c:6580 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x71/0xd0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 79 tgid 79 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:3000 shrink_folio_list+0x28df/0x5010 mm/vmscan.c:1534 evict_folios+0x473e/0x57f0 mm/vmscan.c:4711 try_to_shrink_lruvec+0x8a3/0xb50 mm/vmscan.c:4874 shrink_one+0x25c/0x720 mm/vmscan.c:4919 shrink_many mm/vmscan.c:4982 [inline] lru_gen_shrink_node mm/vmscan.c:5060 [inline] shrink_node+0x2f7d/0x35b0 mm/vmscan.c:6047 kswapd_shrink_node mm/vmscan.c:6901 [inline] balance_pgdat mm/vmscan.c:7084 [inline] kswapd+0x145a/0x2820 mm/vmscan.c:7354 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Memory state around the buggy address: ffff88802311b780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88802311b800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88802311b880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88802311b900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88802311b980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================