================================================================== BUG: KASAN: slab-out-of-bounds in strlen+0x93/0xa0 lib/string.c:413 Read of size 1 at addr ffff88814d695800 by task syz-executor153/5822 CPU: 0 UID: 0 PID: 5822 Comm: syz-executor153 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 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+0xfb/0x1b0 fs/debugfs/file.c:356 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: 0033:0x7f11f9893a39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc84d45838 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f11f9893a39 RDX: 00000000fffffdef RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f11f99065f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 Allocated by task 5822: 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+0xfb/0x1b0 fs/debugfs/file.c:356 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 ffff88814d695000 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 [ffff88814d695000, ffff88814d695800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14d690 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 057ff00000000040 ffff88801ac42000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 057ff00000000040 ffff88801ac42000 dead000000000100 dead000000000122 head: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 057ff00000000003 ffffea000535a401 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 18983173250, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x2c9/0x610 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+0xce2/0x1650 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] __kmalloc_cache_noprof+0xf6/0x420 mm/slub.c:4324 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] cfctrl_create+0x9b/0x320 net/caif/cfctrl.c:39 cfcnfg_create+0xb2/0x500 net/caif/cfcnfg.c:86 caif_init_net+0x7d/0xe0 net/caif/caif_dev.c:514 ops_init+0x1df/0x5f0 net/core/net_namespace.c:138 __register_pernet_operations net/core/net_namespace.c:1267 [inline] register_pernet_operations+0x3a1/0x6f0 net/core/net_namespace.c:1343 register_pernet_subsys+0x28/0x40 net/core/net_namespace.c:1384 caif_device_init+0x16/0x50 net/caif/caif_dev.c:567 do_one_initcall+0x128/0x630 init/main.c:1266 page_owner free stack trace missing Memory state around the buggy address: ffff88814d695700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88814d695780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88814d695800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88814d695880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88814d695900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================