------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 1 PID: 5653 at lib/refcount.c:25 refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25
Modules linked in:
CPU: 1 PID: 5653 Comm: syz.4.341 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25
lr : refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25
sp : ffff800008017800
x29: ffff800008017800 x28: ffff0000cb7fbc00 x27: ffff0000c0b67000
x26: 1fffe00019dc2369 x25: dfff800000000000 x24: 1fffe0001816ce01
x23: ffff0000e8a9b400 x22: ffff0000d3c4b654 x21: ffff0000d8435880
x20: ffff0000d3c4b654 x19: ffff80001659e000 x18: 0000000000000102
x17: 0000000000000000 x16: ffff8000111a97c4 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000101 x10: 0000000000000000 x9 : b1cdcb766e064400
x8 : b1cdcb766e064400 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000080170f8 x4 : ffff80001423f280 x3 : ffff800008503958
x2 : 0000000000000001 x1 : 0000000100000101 x0 : 000000000000002a
Call trace:
 refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 get_net include/net/net_namespace.h:252 [inline]
 tipc_aead_encrypt net/tipc/crypto.c:832 [inline]
 tipc_crypto_xmit+0x1634/0x2220 net/tipc/crypto.c:1772
 tipc_bearer_xmit_skb+0x1f0/0x384 net/tipc/bearer.c:574
 tipc_disc_timeout+0x4c8/0x608 net/tipc/discover.c:338
 call_timer_fn+0x19c/0x858 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x46c/0x6c4 kernel/time/timer.c:1767
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780
 handle_softirqs+0x344/0xbf0 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
 invoke_softirq kernel/softirq.c:457 [inline]
 __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
 irq_exit+0x14/0x88 kernel/softirq.c:683
 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711
 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899
 do_interrupt_handler+0x6c/0x88 arch/arm64/kernel/entry-common.c:267
 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470
 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline]
 raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline]
 finish_lock_switch+0xb8/0x1c4 kernel/sched/core.c:4784
 finish_task_switch+0x120/0x6b0 kernel/sched/core.c:4902
 context_switch kernel/sched/core.c:5033 [inline]
 __schedule+0xe04/0x1c0c kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 schedule_timeout+0xb4/0x2c8 kernel/time/timer.c:1890
 unix_wait_for_peer+0x184/0x250 net/unix/af_unix.c:1304
 unix_dgram_sendmsg+0xb7c/0x1188 net/unix/af_unix.c:1899
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x61c/0x920 net/socket.c:2436
 ___sys_sendmsg+0x1d0/0x240 net/socket.c:2490
 __sys_sendmmsg+0x218/0x5f0 net/socket.c:2576
 __do_sys_sendmmsg net/socket.c:2605 [inline]
 __se_sys_sendmmsg net/socket.c:2602 [inline]
 __arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2602
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 65727
hardirqs last  enabled at (65726): [<ffff8000082f7764>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (65727): [<ffff8000111a5098>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (64330): [<ffff80000819d1e8>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (64330): [<ffff80000819d1e8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604
softirqs last disabled at (65693): [<ffff80000819d7ec>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (65693): [<ffff80000819d7ec>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (65693): [<ffff80000819d7ec>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (65693): [<ffff80000819d7ec>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
---[ end trace b6894e5d4c69fd00 ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 5653 at lib/refcount.c:28 refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 5653 Comm: syz.4.341 Tainted: G        W         5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28
lr : refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28
sp : ffff800008017800
x29: ffff800008017800 x28: ffff0000cb7fbc00 x27: 0000000000000000
x26: 1fffe00019dc2369 x25: dfff800000000000 x24: 1fffe0001816ce01
x23: ffff0000ea846b38 x22: ffff0000d3c4b500 x21: ffff0000d8435880
x20: ffff0000d3c4b654 x19: ffff80001659e000 x18: 0000000000000102
x17: 0000000000000000 x16: ffff8000083008fc x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000101 x10: 0000000000000000 x9 : b1cdcb766e064400
x8 : b1cdcb766e064400 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000080170f8 x4 : ffff80001423f280 x3 : ffff800008300a0c
x2 : 0000000000000001 x1 : 0000000100000101 x0 : 0000000000000026
Call trace:
 refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28
 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
 refcount_dec_and_test include/linux/refcount.h:333 [inline]
 put_net include/net/net_namespace.h:270 [inline]
 tipc_aead_encrypt net/tipc/crypto.c:840 [inline]
 tipc_crypto_xmit+0x177c/0x2220 net/tipc/crypto.c:1772
 tipc_bearer_xmit_skb+0x1f0/0x384 net/tipc/bearer.c:574
 tipc_disc_timeout+0x4c8/0x608 net/tipc/discover.c:338
 call_timer_fn+0x19c/0x858 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x46c/0x6c4 kernel/time/timer.c:1767
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780
 handle_softirqs+0x344/0xbf0 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
 invoke_softirq kernel/softirq.c:457 [inline]
 __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
 irq_exit+0x14/0x88 kernel/softirq.c:683
 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711
 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899
 do_interrupt_handler+0x6c/0x88 arch/arm64/kernel/entry-common.c:267
 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470
 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline]
 raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline]
 finish_lock_switch+0xb8/0x1c4 kernel/sched/core.c:4784
 finish_task_switch+0x120/0x6b0 kernel/sched/core.c:4902
 context_switch kernel/sched/core.c:5033 [inline]
 __schedule+0xe04/0x1c0c kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 schedule_timeout+0xb4/0x2c8 kernel/time/timer.c:1890
 unix_wait_for_peer+0x184/0x250 net/unix/af_unix.c:1304
 unix_dgram_sendmsg+0xb7c/0x1188 net/unix/af_unix.c:1899
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x61c/0x920 net/socket.c:2436
 ___sys_sendmsg+0x1d0/0x240 net/socket.c:2490
 __sys_sendmmsg+0x218/0x5f0 net/socket.c:2576
 __do_sys_sendmmsg net/socket.c:2605 [inline]
 __se_sys_sendmmsg net/socket.c:2602 [inline]
 __arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2602
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 65753
hardirqs last  enabled at (65752): [<ffff8000082f7764>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (65753): [<ffff8000111a5098>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (64330): [<ffff80000819d1e8>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (64330): [<ffff80000819d1e8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604
softirqs last disabled at (65693): [<ffff80000819d7ec>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (65693): [<ffff80000819d7ec>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (65693): [<ffff80000819d7ec>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (65693): [<ffff80000819d7ec>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
---[ end trace b6894e5d4c69fd01 ]---
------------[ cut here ]------------
refcount_t: saturated; leaking memory.
WARNING: CPU: 1 PID: 5650 at lib/refcount.c:22 refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22
Modules linked in:
CPU: 1 PID: 5650 Comm: syz.2.340 Tainted: G        W         5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22
lr : refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22
sp : ffff800008017800
x29: ffff800008017800 x28: ffff0000e8810400 x27: ffff0000c0b67000
x26: 1fffe00019ddca39 x25: dfff800000000000 x24: 1fffe0001816ce01
x23: ffff0000e8a9b400 x22: ffff0000d3c4b654 x21: 000000007ffffffe
x20: ffff0000d3c4b654 x19: ffff80001659e000 x18: 0000000000000102
x17: 0000000000000000 x16: ffff8000083008fc x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000101 x10: 0000000000000000 x9 : b64631a74e283c00
x8 : b64631a74e283c00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000080170f8 x4 : ffff80001423f280 x3 : ffff800008300a0c
x2 : 0000000000000001 x1 : 0000000000000101 x0 : 0000000000000026
Call trace:
 refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22
 __refcount_add include/linux/refcount.h:-1 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 get_net include/net/net_namespace.h:252 [inline]
 tipc_aead_encrypt net/tipc/crypto.c:832 [inline]
 tipc_crypto_xmit+0x1634/0x2220 net/tipc/crypto.c:1772
 tipc_bearer_xmit_skb+0x1f0/0x384 net/tipc/bearer.c:574
 tipc_disc_timeout+0x4c8/0x608 net/tipc/discover.c:338
 call_timer_fn+0x19c/0x858 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x46c/0x6c4 kernel/time/timer.c:1767
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780
 handle_softirqs+0x344/0xbf0 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
 invoke_softirq kernel/softirq.c:457 [inline]
 __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
 irq_exit+0x14/0x88 kernel/softirq.c:683
 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711
 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899
 do_interrupt_handler+0x6c/0x88 arch/arm64/kernel/entry-common.c:267
 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470
 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline]
 raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline]
 finish_lock_switch+0xb8/0x1c4 kernel/sched/core.c:4784
 finish_task_switch+0x120/0x6b0 kernel/sched/core.c:4902
 context_switch kernel/sched/core.c:5033 [inline]
 __schedule+0xe04/0x1c0c kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 do_notify_resume+0x144/0x3128 arch/arm64/kernel/signal.c:932
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_interrupt+0x10c/0x25c arch/arm64/kernel/entry-common.c:685
 __el0_irq_handler_common+0x18/0x24 arch/arm64/kernel/entry-common.c:690
 el0t_64_irq_handler+0x10/0x1c arch/arm64/kernel/entry-common.c:695
 el0t_64_irq+0x1a0/0x1a4 arch/arm64/kernel/entry.S:585
irq event stamp: 24043
hardirqs last  enabled at (24042): [<ffff8000082f7764>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (24043): [<ffff8000111a5098>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (15130): [<ffff80000819d1e8>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (15130): [<ffff80000819d1e8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604
softirqs last disabled at (24011): [<ffff80000819d7ec>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (24011): [<ffff80000819d7ec>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (24011): [<ffff80000819d7ec>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (24011): [<ffff80000819d7ec>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
---[ end trace b6894e5d4c69fd02 ]---