================================================================== BUG: KASAN: slab-out-of-bounds in strlen+0x93/0xa0 lib/string.c:413 Read of size 1 at addr ffff88805cabd800 by task syz.2.723/9134 CPU: 0 UID: 0 PID: 9134 Comm: syz.2.723 Not tainted 6.13.0-syzkaller-07259-g0f8e26b38d7a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 strlen+0x93/0xa0 lib/string.c:413 kstrdup+0x29/0xb0 mm/util.c:81 debug_string_to_mask+0x82/0x570 fs/orangefs/orangefs-debugfs.c:836 orangefs_debug_write+0x22e/0x780 fs/orangefs/orangefs-debugfs.c:423 full_proxy_write+0xfd/0x1b0 fs/debugfs/file.c:369 vfs_write+0x24c/0x1150 fs/read_write.c:677 ksys_write+0x12b/0x250 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb93a58cd29 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:00007fb93b3c9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb93a7a5fa0 RCX: 00007fb93a58cd29 RDX: 00000000fffffdef RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fb93a60e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb93a7a5fa0 R15: 00007ffc2ef8b838 Allocated by task 9134: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] orangefs_debug_write+0x14c/0x780 fs/orangefs/orangefs-debugfs.c:401 full_proxy_write+0xfd/0x1b0 fs/debugfs/file.c:369 vfs_write+0x24c/0x1150 fs/read_write.c:677 ksys_write+0x12b/0x250 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805cabd000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes to the right of allocated 2048-byte region [ffff88805cabd000, ffff88805cabd800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5cab8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b042000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff88801b042000 dead000000000100 dead000000000122 head: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea000172ae01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5825, tgid 5825 (syz-executor), ts 70481999227, free_ts 21988345290 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476 __alloc_pages_noprof+0x221/0x2470 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x2c8/0x620 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xbcd/0x1590 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_noprof+0x2de/0x4f0 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2181 sk_alloc+0x36/0xb90 net/core/sock.c:2234 __netlink_create+0x5e/0x2c0 net/netlink/af_netlink.c:629 netlink_create+0x3a4/0x630 net/netlink/af_netlink.c:687 __sock_create+0x335/0x8d0 net/socket.c:1543 sock_create net/socket.c:1601 [inline] __sys_socket_create net/socket.c:1638 [inline] __sys_socket+0x14f/0x260 net/socket.c:1685 __do_sys_socket net/socket.c:1699 [inline] __se_sys_socket net/socket.c:1697 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1697 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0x1080 mm/page_alloc.c:2659 free_contig_range+0x133/0x3f0 mm/page_alloc.c:6635 destroy_args+0x802/0xa50 mm/debug_vm_pgtable.c:1017 debug_vm_pgtable+0x149c/0x2f20 mm/debug_vm_pgtable.c:1397 do_one_initcall+0x128/0x630 init/main.c:1267 do_initcall_level init/main.c:1329 [inline] do_initcalls init/main.c:1345 [inline] do_basic_setup init/main.c:1364 [inline] kernel_init_freeable+0x58f/0x8b0 init/main.c:1578 kernel_init+0x1c/0x2b0 init/main.c:1467 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88805cabd700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805cabd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805cabd800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805cabd880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805cabd900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================