================================================================== 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+0x8fb/0xa80 crypto/af_alg.c:711 Read of size 8 at addr ffff8880283c26e0 by task syz.4.621/8292 CPU: 0 UID: 0 PID: 8292 Comm: syz.4.621 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x156/0x4c9 mm/kasan/report.c:482 kasan_report+0xdf/0x1e0 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+0x8fb/0xa80 crypto/af_alg.c:711 _skcipher_recvmsg crypto/algif_skcipher.c:152 [inline] skcipher_recvmsg+0x512/0x1020 crypto/algif_skcipher.c:221 sock_recvmsg_nosec net/socket.c:1078 [inline] sock_recvmsg+0x1a4/0x1f0 net/socket.c:1100 ____sys_recvmsg+0x218/0x640 net/socket.c:2812 ___sys_recvmsg+0x16a/0x1a0 net/socket.c:2854 __sys_recvmsg+0x16d/0x220 net/socket.c:2887 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f235539c819 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:00007f23562ae028 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007f2355615fa0 RCX: 00007f235539c819 RDX: 0000000000002000 RSI: 00002000000058c0 RDI: 0000000000000007 RBP: 00007f2355432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2355616038 R14: 00007f2355615fa0 R15: 00007fff2e02a138 Allocated by task 8292: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5260 [inline] __kmalloc_noprof+0x301/0x850 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] sock_kmalloc+0x111/0x170 net/core/sock.c:2880 _skcipher_recvmsg crypto/algif_skcipher.c:144 [inline] skcipher_recvmsg+0x48b/0x1020 crypto/algif_skcipher.c:221 sock_recvmsg_nosec net/socket.c:1078 [inline] sock_recvmsg+0x1a4/0x1f0 net/socket.c:1100 ____sys_recvmsg+0x218/0x640 net/socket.c:2812 ___sys_recvmsg+0x16a/0x1a0 net/socket.c:2854 __sys_recvmsg+0x16d/0x220 net/socket.c:2887 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880283c2680 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes to the right of allocated 96-byte region [ffff8880283c2680, ffff8880283c26e0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x283c2 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88813fe40280 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800200020 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 152, tgid 152 (kworker/u8:6), ts 4840927978, free_ts 4838619805 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x153/0x170 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab mm/slub.c:3481 [inline] new_slab+0xa6/0x6b0 mm/slub.c:3539 refill_objects+0x26b/0x400 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] __pcs_replace_empty_main+0x1ab/0x660 mm/slub.c:4615 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x688/0x850 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] lsm_blob_alloc+0x68/0x90 security/security.c:193 lsm_task_alloc security/security.c:245 [inline] security_task_alloc+0x2a/0x260 security/security.c:2683 copy_process+0x258f/0x7a40 kernel/fork.c:2205 kernel_clone+0xfc/0x9a0 kernel/fork.c:2653 user_mode_thread+0xcc/0x110 kernel/fork.c:2729 call_usermodehelper_exec_work kernel/umh.c:171 [inline] call_usermodehelper_exec_work+0xcb/0x180 kernel/umh.c:157 process_one_work+0xa23/0x19a0 kernel/workqueue.c:3276 process_scheduled_works kernel/workqueue.c:3359 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3440 kthread+0x370/0x450 kernel/kthread.c:436 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:1433 [inline] __free_frozen_pages+0x7e1/0x10d0 mm/page_alloc.c:2978 vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479 vfree+0x55/0x80 mm/vmalloc.c:3456 free_partitions block/partitions/core.c:114 [inline] check_partition block/partitions/core.c:173 [inline] blk_add_partitions block/partitions/core.c:590 [inline] bdev_disk_changed+0x9ee/0xc80 block/partitions/core.c:694 blkdev_get_whole+0x187/0x290 block/bdev.c:764 bdev_open+0x2c7/0xe40 block/bdev.c:973 bdev_file_open_by_dev block/bdev.c:1075 [inline] bdev_file_open_by_dev+0x179/0x210 block/bdev.c:1050 disk_scan_partitions+0x1ef/0x320 block/genhd.c:387 add_disk_final block/genhd.c:416 [inline] add_disk_fwnode+0x3ed/0x5c0 block/genhd.c:610 add_disk include/linux/blkdev.h:785 [inline] null_add_dev+0x129d/0x1df0 drivers/block/null_blk/main.c:2052 null_create_dev drivers/block/null_blk/main.c:2106 [inline] null_init+0x3a4/0x480 drivers/block/null_blk/main.c:2178 do_one_initcall+0x11d/0x760 init/main.c:1382 do_initcall_level init/main.c:1444 [inline] do_initcalls init/main.c:1460 [inline] do_basic_setup init/main.c:1479 [inline] kernel_init_freeable+0x6e5/0x7a0 init/main.c:1692 kernel_init+0x1f/0x1e0 init/main.c:1582 ret_from_fork+0x754/0xd80 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: ffff8880283c2580: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880283c2600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880283c2680: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffff8880283c2700: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff8880283c2780: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ==================================================================