================================================================== BUG: KASAN: slab-use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline] BUG: KASAN: slab-use-after-free in do_raw_spin_unlock+0x1f7/0x230 kernel/locking/spinlock_debug.c:140 Read of size 4 at addr ffff88801c3bc93c by task kworker/3:4/978 CPU: 3 PID: 978 Comm: kworker/3:4 Not tainted 6.6.0-rc5-syzkaller-g94f6f0550c62 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: pencrypt_serial padata_serial_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline] do_raw_spin_unlock+0x1f7/0x230 kernel/locking/spinlock_debug.c:140 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline] _raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] tls_encrypt_done+0x281/0x560 net/tls/tls_sw.c:488 padata_serial_worker+0x246/0x490 kernel/padata.c:378 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Allocated by task 5597: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] tls_set_sw_offload+0x12e0/0x1700 net/tls/tls_sw.c:2606 do_tls_setsockopt_conf net/tls/tls_main.c:667 [inline] do_tls_setsockopt net/tls/tls_main.c:772 [inline] tls_setsockopt+0x108c/0x1340 net/tls/tls_main.c:800 __sys_setsockopt+0x2cd/0x5b0 net/socket.c:2325 __do_sys_setsockopt net/socket.c:2336 [inline] __se_sys_setsockopt net/socket.c:2333 [inline] __x64_sys_setsockopt+0xbd/0x150 net/socket.c:2333 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5596: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] __cache_free mm/slab.c:3370 [inline] __do_kmem_cache_free mm/slab.c:3557 [inline] __kmem_cache_free+0xcc/0x2d0 mm/slab.c:3564 tls_sk_proto_close+0x4c3/0xb00 net/tls/tls_main.c:390 inet_release+0x132/0x270 net/ipv4/af_inet.c:433 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:484 __sock_release+0xae/0x260 net/socket.c:659 sock_close+0x1c/0x20 net/socket.c:1419 __fput+0x3f7/0xa70 fs/file_table.c:384 __fput_sync+0x47/0x50 fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1557 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801c3bc800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 316 bytes inside of freed 512-byte region [ffff88801c3bc800, ffff88801c3bca00) The buggy address belongs to the physical page: page:ffffea000070ef00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c3bc flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0x4() raw: 00fff00000000800 ffff888012c40600 ffffea0000735110 ffffea00006d3810 raw: 0000000000000000 ffff88801c3bc000 0000000100000004 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 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 646, tgid 646 (kworker/u16:0), ts 9457497719, free_ts 9456618192 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426 __alloc_pages_node include/linux/gfp.h:237 [inline] kmem_getpages mm/slab.c:1356 [inline] cache_grow_begin+0x99/0x3a0 mm/slab.c:2550 cache_alloc_refill+0x294/0x3a0 mm/slab.c:2923 ____cache_alloc mm/slab.c:2999 [inline] ____cache_alloc mm/slab.c:2982 [inline] __do_cache_alloc mm/slab.c:3182 [inline] slab_alloc_node mm/slab.c:3230 [inline] __kmem_cache_alloc_node+0x3c5/0x470 mm/slab.c:3521 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1114 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] alloc_bprm+0x51/0xaf0 fs/exec.c:1514 kernel_execve+0xaf/0x4e0 fs/exec.c:1989 call_usermodehelper_exec_async+0x256/0x4c0 kernel/umh.c:110 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405 mm_free_pgd kernel/fork.c:803 [inline] __mmdrop+0xd7/0x470 kernel/fork.c:919 mmdrop include/linux/sched/mm.h:54 [inline] __mmput+0x409/0x4d0 kernel/fork.c:1360 mmput+0x62/0x70 kernel/fork.c:1371 free_bprm+0x144/0x3f0 fs/exec.c:1492 kernel_execve+0x3e7/0x4e0 fs/exec.c:2026 call_usermodehelper_exec_async+0x256/0x4c0 kernel/umh.c:110 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Memory state around the buggy address: ffff88801c3bc800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801c3bc880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801c3bc900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801c3bc980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801c3bca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================