------------[ cut here ]------------
WARNING: CPU: 0 PID: 4461 at net/tls/tls_strp.c:493 tls_strp_msg_load+0x5ac/0x82c net/tls/tls_strp.c:493
Modules linked in:
CPU: 0 PID: 4461 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : tls_strp_msg_load+0x5ac/0x82c net/tls/tls_strp.c:493
lr : tls_strp_msg_load+0x5ac/0x82c net/tls/tls_strp.c:493
sp : ffff800020d774c0
x29: ffff800020d77540 x28: 1fffe0001b039e9b x27: 1fffe0001b039e9b
x26: ffff7000041aee9c x25: dfff800000000000 x24: ffff0000d81cf4dc
x23: 0000000000000000 x22: 000000000000001e x21: ffff0000dd963da0
x20: ffff0000d81cf4d0 x19: ffff0000d81cf4d8 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800011b90080 x15: 0000000000000000
x14: 0000000000000002 x13: 1ffff000041aef06 x12: 0000000000000000
x11: ff008000108900fc x10: 0000000000000000 x9 : ffff8000108900fc
x8 : ffff0000c328d400 x7 : 0000000000000000 x6 : ffff800020d777fc
x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000001
x2 : 0000000000000000 x1 : 000000000000001e x0 : 0000000000000000
Call trace:
 tls_strp_msg_load+0x5ac/0x82c net/tls/tls_strp.c:493
 tls_rx_rec_wait+0x784/0x8c0 net/tls/tls_sw.c:1513
 tls_sw_recvmsg+0x554/0x181c net/tls/tls_sw.c:2170
 inet_recvmsg+0x118/0x1c8 net/ipv4/af_inet.c:890
 ____sys_recvmsg+0x270/0x754 net/socket.c:-1
 ___sys_recvmsg net/socket.c:2780 [inline]
 __sys_recvmsg+0x250/0x33c net/socket.c:2810
 __do_sys_recvmsg net/socket.c:2820 [inline]
 __se_sys_recvmsg net/socket.c:2817 [inline]
 __arm64_sys_recvmsg+0x80/0x94 net/socket.c:2817
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 850
hardirqs last  enabled at (849): [<ffff8000081ad57c>] __local_bh_enable_ip+0x1f8/0x37c kernel/softirq.c:426
hardirqs last disabled at (850): [<ffff800011b8c2bc>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (848): [<ffff80000fe92ffc>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (848): [<ffff80000fe92ffc>] lock_sock_nested+0xe0/0x130 net/core/sock.c:3512
softirqs last disabled at (846): [<ffff80000fe92fa4>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (846): [<ffff80000fe92fa4>] lock_sock_nested+0x88/0x130 net/core/sock.c:3508
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: use-after-free in __skb_nsg+0x474/0x504 net/tls/tls_sw.c:126
Read of size 4 at addr ffff0000d0517a60 by task syz.0.17/4461

CPU: 1 PID: 4461 Comm: syz.0.17 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350
 __skb_nsg+0x474/0x504 net/tls/tls_sw.c:126
 skb_nsg net/tls/tls_sw.c:153 [inline]
 tls_decrypt_sg+0x268/0x27c8 net/tls/tls_sw.c:1636
 tls_decrypt_sw+0xb8/0x9e0 net/tls/tls_sw.c:1798
 tls_rx_one_record+0x164/0xc18 net/tls/tls_sw.c:1889
 tls_sw_recvmsg+0x7e8/0x181c net/tls/tls_sw.c:2202
 inet_recvmsg+0x118/0x1c8 net/ipv4/af_inet.c:890
 ____sys_recvmsg+0x270/0x754 net/socket.c:-1
 ___sys_recvmsg net/socket.c:2780 [inline]
 __sys_recvmsg+0x250/0x33c net/socket.c:2810
 __do_sys_recvmsg net/socket.c:2820 [inline]
 __se_sys_recvmsg net/socket.c:2817 [inline]
 __arm64_sys_recvmsg+0x80/0x94 net/socket.c:2817
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Allocated by task 4462:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:53
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x430 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 kmem_cache_alloc_node+0x258/0x344 mm/slub.c:3404
 __alloc_skb+0x128/0x728 net/core/skbuff.c:505
 alloc_skb_fclone include/linux/skbuff.h:1353 [inline]
 tcp_stream_alloc_skb+0x48/0x2d8 net/ipv4/tcp.c:873
 tcp_build_frag net/ipv4/tcp.c:998 [inline]
 do_tcp_sendpages+0x798/0x22dc net/ipv4/tcp.c:1087
 tls_push_sg+0x128/0x6e4 net/tls/tls_main.c:150
 tls_tx_records+0x2bc/0x4b8 net/tls/tls_sw.c:445
 tls_push_record+0x1860/0x2d78 net/tls/tls_sw.c:865
 bpf_exec_tx_verdict+0xc88/0x1258 net/tls/tls_sw.c:885
 tls_sw_sendmsg+0xabc/0x14d4 net/tls/tls_sw.c:1120
 inet_sendmsg+0x154/0x27c net/ipv4/af_inet.c:841
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x588/0x90c net/socket.c:2519
 ___sys_sendmsg net/socket.c:2573 [inline]
 __sys_sendmsg+0x288/0x374 net/socket.c:2602
 __do_sys_sendmsg net/socket.c:2611 [inline]
 __se_sys_sendmsg net/socket.c:2609 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2609
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Freed by task 4462:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:53
 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516
 ____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:237
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:245
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x16c/0x1e8 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 kmem_cache_free+0x118/0x318 mm/slub.c:3709
 kfree_skbmem+0x10c/0x198 net/core/skbuff.c:-1
 __kfree_skb+0x5c/0x74 net/core/skbuff.c:871
 tcp_wmem_free_skb include/net/tcp.h:306 [inline]
 tcp_rtx_queue_unlink_and_free+0x2ec/0x4a4 include/net/tcp.h:1978
 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3412 [inline]
 tcp_ack+0x19c4/0x4d08 net/ipv4/tcp_input.c:3971
 tcp_rcv_established+0xb0c/0x1d30 net/ipv4/tcp_input.c:6104
 tcp_v4_do_rcv+0x784/0xa68 net/ipv4/tcp_ipv4.c:1684
 sk_backlog_rcv include/net/sock.h:1138 [inline]
 __release_sock+0x1b0/0x3b0 net/core/sock.c:2954
 release_sock+0x60/0x1bc net/core/sock.c:3520
 tls_sw_sendmsg+0x1244/0x14d4 net/tls/tls_sw.c:1246
 inet_sendmsg+0x154/0x27c net/ipv4/af_inet.c:841
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x588/0x90c net/socket.c:2519
 ___sys_sendmsg net/socket.c:2573 [inline]
 __sys_sendmsg+0x288/0x374 net/socket.c:2602
 __do_sys_sendmsg net/socket.c:2611 [inline]
 __se_sys_sendmsg net/socket.c:2609 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2609
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the object at ffff0000d0517900
 which belongs to the cache skbuff_fclone_cache of size 488
The buggy address is located 352 bytes inside of
 488-byte region [ffff0000d0517900, ffff0000d0517ae8)

The buggy address belongs to the physical page:
page:00000000d5b4479a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110516
head:00000000d5b4479a order:1 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0870300
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d0517900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000d0517980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000d0517a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff0000d0517a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
 ffff0000d0517b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4461 at net/core/skbuff.c:4603 __skb_to_sgvec+0x540/0x900 net/core/skbuff.c:4603
Modules linked in:
CPU: 1 PID: 4461 Comm: syz.0.17 Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __skb_to_sgvec+0x540/0x900 net/core/skbuff.c:4603
lr : __skb_to_sgvec+0x540/0x900 net/core/skbuff.c:4603
sp : ffff800020d77120
x29: ffff800020d77170 x28: 1fffe0001993b419 x27: ffff0000c3114d08
x26: dfff800000000000 x25: ffff0000cc9da0d0 x24: 0000000000000000
x23: 000000000000000d x22: ffff0000cc9da0cc x21: 0000000000000000
x20: 00000000fffffff1 x19: 00000000ffffffe4 x18: 1fffe00033e7697e
x17: 0000000000fe010c x16: ffff800011b90080 x15: 0000000000000000
x14: 0000000000000008 x13: 1fffe0001862299d x12: 0000000000000000
x11: ff0080000feb61f8 x10: 0000000000000000 x9 : ffff80000feb61f8
x8 : ffff0000c328d400 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff0000c3114ca0 x4 : 0000000000000000 x3 : 00000000ffffffe4
x2 : 000000000000000d x1 : 00000000fffffff1 x0 : 0000000000000000
Call trace:
 __skb_to_sgvec+0x540/0x900 net/core/skbuff.c:4603
 skb_to_sgvec+0x40/0xb4 net/core/skbuff.c:4664
 tls_decrypt_sg+0xe6c/0x27c8 net/tls/tls_sw.c:1727
 tls_decrypt_sw+0xb8/0x9e0 net/tls/tls_sw.c:1798
 tls_rx_one_record+0x164/0xc18 net/tls/tls_sw.c:1889
 tls_sw_recvmsg+0x7e8/0x181c net/tls/tls_sw.c:2202
 inet_recvmsg+0x118/0x1c8 net/ipv4/af_inet.c:890
 ____sys_recvmsg+0x270/0x754 net/socket.c:-1
 ___sys_recvmsg net/socket.c:2780 [inline]
 __sys_recvmsg+0x250/0x33c net/socket.c:2810
 __do_sys_recvmsg net/socket.c:2820 [inline]
 __se_sys_recvmsg net/socket.c:2817 [inline]
 __arm64_sys_recvmsg+0x80/0x94 net/socket.c:2817
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 1317
hardirqs last  enabled at (1317): [<ffff80000825abe4>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (1317): [<ffff80000825abe4>] finish_lock_switch+0xb0/0x1c8 kernel/sched/core.c:5005
hardirqs last disabled at (1316): [<ffff800011c630f8>] __schedule+0x294/0x1a6c kernel/sched/core.c:6461
softirqs last  enabled at (900): [<ffff8000081ae3bc>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (900): [<ffff8000081ae3bc>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (853): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:4646!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4461 Comm: syz.0.17 Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __skb_to_sgvec+0x8fc/0x900 net/core/skbuff.c:4646
lr : __skb_to_sgvec+0x8fc/0x900 net/core/skbuff.c:4646
sp : ffff800020d77120
x29: ffff800020d77170 x28: 1fffe0001993b419 x27: ffff0000c3114d08
x26: dfff800000000000 x25: 0000000000000000 x24: 0000000000000000
x23: 000000000000000d x22: ffff0000cc9da0cc x21: 0000000000000001
x20: ffff0000ccaa58c0 x19: 00000000ffffffe4 x18: 1fffe00033e7697e
x17: 0000000000fe010c x16: ffff800011b90080 x15: 0000000000000000
x14: 0000000000000008 x13: 1fffe0001862299d x12: 0000000000000000
x11: ff0080000feb65b4 x10: 0000000000000000 x9 : ffff80000feb65b4
x8 : ffff0000c328d400 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff0000c3114ca0 x4 : 0000000000000000 x3 : 00000000ffffffe4
x2 : 000000000000000d x1 : 00000000ffffffe4 x0 : 0000000000000000
Call trace:
 __skb_to_sgvec+0x8fc/0x900 net/core/skbuff.c:4646
 skb_to_sgvec+0x40/0xb4 net/core/skbuff.c:4664
 tls_decrypt_sg+0xe6c/0x27c8 net/tls/tls_sw.c:1727
 tls_decrypt_sw+0xb8/0x9e0 net/tls/tls_sw.c:1798
 tls_rx_one_record+0x164/0xc18 net/tls/tls_sw.c:1889
 tls_sw_recvmsg+0x7e8/0x181c net/tls/tls_sw.c:2202
 inet_recvmsg+0x118/0x1c8 net/ipv4/af_inet.c:890
 ____sys_recvmsg+0x270/0x754 net/socket.c:-1
 ___sys_recvmsg net/socket.c:2780 [inline]
 __sys_recvmsg+0x250/0x33c net/socket.c:2810
 __do_sys_recvmsg net/socket.c:2820 [inline]
 __se_sys_recvmsg net/socket.c:2817 [inline]
 __arm64_sys_recvmsg+0x80/0x94 net/socket.c:2817
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: d4210000 9617f187 d4210000 9617f185 (d4210000) 
---[ end trace 0000000000000000 ]---