================================================================== BUG: KASAN: slab-out-of-bounds in sg_assign_page include/linux/scatterlist.h:131 [inline] BUG: KASAN: slab-out-of-bounds in sg_set_page include/linux/scatterlist.h:162 [inline] BUG: KASAN: slab-out-of-bounds in af_alg_pull_tsgl+0x1c6/0x740 crypto/af_alg.c:711 Read of size 8 at addr ffff888035904ae0 by task syz.1.5891/27917 CPU: 0 UID: 0 PID: 27917 Comm: syz.1.5891 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 sg_assign_page include/linux/scatterlist.h:131 [inline] sg_set_page include/linux/scatterlist.h:162 [inline] af_alg_pull_tsgl+0x1c6/0x740 crypto/af_alg.c:711 _skcipher_recvmsg crypto/algif_skcipher.c:152 [inline] skcipher_recvmsg+0x5df/0x1140 crypto/algif_skcipher.c:221 sock_recvmsg_nosec net/socket.c:1072 [inline] sock_recvmsg+0x172/0x1b0 net/socket.c:1094 ____sys_recvmsg+0x1e6/0x4a0 net/socket.c:2853 ___sys_recvmsg+0x215/0x590 net/socket.c:2895 do_recvmmsg+0x334/0x800 net/socket.c:2990 __sys_recvmmsg net/socket.c:3064 [inline] __do_sys_recvmmsg net/socket.c:3087 [inline] __se_sys_recvmmsg net/socket.c:3080 [inline] __x64_sys_recvmmsg+0x198/0x250 net/socket.c:3080 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fedb039c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fedb12b9028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fedb0615fa0 RCX: 00007fedb039c819 RDX: 0000000000000001 RSI: 0000200000004c00 RDI: 0000000000000004 RBP: 00007fedb0432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000040000020 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fedb0616038 R14: 00007fedb0615fa0 R15: 00007ffc52c613c8 Allocated by task 27917: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] sock_kmalloc+0xd6/0x160 net/core/sock.c:2883 _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline] skcipher_recvmsg+0x54d/0x1140 crypto/algif_skcipher.c:221 sock_recvmsg_nosec net/socket.c:1072 [inline] sock_recvmsg+0x172/0x1b0 net/socket.c:1094 ____sys_recvmsg+0x1e6/0x4a0 net/socket.c:2853 ___sys_recvmsg+0x215/0x590 net/socket.c:2895 do_recvmmsg+0x334/0x800 net/socket.c:2990 __sys_recvmmsg net/socket.c:3064 [inline] __do_sys_recvmmsg net/socket.c:3087 [inline] __se_sys_recvmmsg net/socket.c:3080 [inline] __x64_sys_recvmmsg+0x198/0x250 net/socket.c:3080 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888035904ac0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes to the right of allocated 32-byte region [ffff888035904ac0, ffff888035904ae0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35904 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88813feac780 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800400040 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5489, tgid 5489 (dhcpcd), ts 57877347351, free_ts 57875428838 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab+0x77/0x660 mm/slub.c:3481 new_slab mm/slub.c:3539 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] __pcs_replace_empty_main+0x2e6/0x730 mm/slub.c:4615 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __kmalloc_cache_noprof+0x392/0x660 mm/slub.c:5375 kmalloc_noprof include/linux/slab.h:950 [inline] slab_free_hook mm/slub.c:2637 [inline] slab_free mm/slub.c:6165 [inline] kmem_cache_free+0x15b/0x630 mm/slub.c:6295 remove_vma mm/vma.c:470 [inline] vms_complete_munmap_vmas+0x929/0xc60 mm/vma.c:1342 do_vmi_align_munmap+0x3b7/0x4b0 mm/vma.c:1585 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1633 __vm_munmap+0x22c/0x3d0 mm/vma.c:3261 __do_sys_munmap mm/mmap.c:1078 [inline] __se_sys_munmap mm/mmap.c:1075 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1075 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5489 tgid 5489 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0xc2b/0xdb0 mm/page_alloc.c:2978 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1b2/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd73/0x14b0 mm/vmalloc.c:2129 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024 __vmalloc_node_noprof+0xc2/0x100 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:355 [inline] dup_task_struct+0x275/0x9a0 kernel/fork.c:924 copy_process+0x508/0x3cd0 kernel/fork.c:2050 kernel_clone+0x248/0x8e0 kernel/fork.c:2653 __do_sys_clone3 kernel/fork.c:2955 [inline] __se_sys_clone3+0x33c/0x360 kernel/fork.c:2934 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888035904980: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff888035904a00: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc >ffff888035904a80: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ^ ffff888035904b00: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff888035904b80: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc ==================================================================