Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1244011

[BUG] x86: apic: Possible null pointer dereference by apic_ack_edge

Show all headers | View raw

Hello,

In mainline kernel version 4.3-rc4, the following line located in the
apic_ack_edge function definition can result in a null pointer dereference:

        irq_complete_move(irqd_cfg(data));
        
The irqd_cfg function may return a value of NULL. If NULL is passed to the
irq_complete_move function, then the struct apic_chip_data pointer 'data' of
the __irq_complete_move function will be defined, and subsequently dereferenced,
based on this incorrect NULL value passed through the 'cfg' parameter:

        data = container_of(cfg, struct apic_chip_data, cfg);
        if (likely(!data->move_in_progress))
        
Sincerely,

William Breathitt Gray
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[BUG] x86: apic: Possible null pointer dereference by apic_ack_edge William Breathitt Gray <vilhelm.gray@gmail.com> - 2015-10-10 23:00 +0200
  Re: [BUG] x86: apic: Possible null pointer dereference by  apic_ack_edge Thomas Gleixner <tglx@linutronix.de> - 2015-10-11 10:40 +0200

csiph-web