On Mon, Aug 13, 2018 at 05:55:02PM -0700, syzbot wrote: > ------------[ cut here ]------------ > refcount_t: underflow; use-after-free. > WARNING: CPU: 1 PID: 7203 at lib/refcount.c:187 > refcount_sub_and_test+0x2e7/0x350 lib/refcount.c:187 > Kernel panic - not syncing: panic_on_warn set ... > ... > refcount_dec_and_test+0x1a/0x20 lib/refcount.c:212 > sctp_transport_put+0x76/0x200 net/sctp/transport.c:331 > sctp_generate_heartbeat_event+0x2d7/0x450 net/sctp/sm_sideeffect.c:416 > call_timer_fn+0x242/0x970 kernel/time/timer.c:1326 > expire_timers kernel/time/timer.c:1363 [inline] > __run_timers+0x7a6/0xc70 kernel/time/timer.c:1666 > run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 > __do_softirq+0x2e8/0xb17 kernel/softirq.c:292 > invoke_softirq kernel/softirq.c:372 [inline] > irq_exit+0x1d4/0x210 kernel/softirq.c:412 > exiting_irq arch/x86/include/asm/apic.h:527 [inline] > smp_apic_timer_interrupt+0x186/0x730 arch/x86/kernel/apic/apic.c:1055 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 > </IRQ> Interesting, again on heartbeat timer handler. Marcelo
