[IrDA] Oops with NULL deref in irda_device_set_media_busy

From: Michal Rokos (michal_at_rokos.info)
Date: 04/05/05

  • Next message: Paul Mackerras: "Re: 2.6.12-rc2-mm1" 
    To: Jean Tourrilhes <jt@hpl.hp.com>, linux-kernel@vger.kernel.org
Date:	Tue, 5 Apr 2005 11:02:26 +0200

    Hello,

    I've problems with IrDA - when debug is off, I'm getting oops for obvious
    reason...
    (I don't have a log, this is just rewrite from screen:
    EIP: irda_device_set_media_busy+0x15/0x40 [irda]
    ali_ircc_sir_receive+0x4a/0x70
    ali_ircc_sir_interrupt+0x66/0x70
    ali_ircc_interrupt+0x5e/0x80
    .....
    )
    When I turn debug on, I get just
    Assertion failed! net/irda/irda_device.c:irda_device_set_media_busy:128
    self != NULL

    The obvious reason is that I don't have irlap module in that inits
    dev->atalk_ptr, so I'm getting assertion exception in irda_device.c:489.

    A few info that could be handy:

    $ uname -a # It's yesterday bk snapshot
    Linux csas 2.6.12-rc1-mr #14 Mon Apr 4 13:42:14 CEST 2005 i686 GNU/Linux

    $ lsmod | grep ir
    ircomm_tty 39176 3
    ircomm 22404 1 ircomm_tty
    ali_ircc 26032 0
    irda 192316 3 ircomm_tty,ircomm,ali_ircc
    crc_ccitt 2176 2 ppp_async,irda

    $ grep IR .config
    CONFIG_IRDA=m
    # CONFIG_IRLAN is not set
    CONFIG_IRNET=m
    CONFIG_IRCOMM=m
    CONFIG_IRDA_ULTRA=y
    CONFIG_IRDA_CACHE_LAST_LSAP=y
    CONFIG_IRDA_FAST_RR=y
    CONFIG_IRDA_DEBUG=y
    # SIR device drivers
    # CONFIG_IRTTY_SIR is not set
    # Old SIR device drivers
    # CONFIG_IRPORT_SIR is not set
    # FIR device drivers
    # CONFIG_USB_IRDA is not set
    # CONFIG_SIGMATEL_FIR is not set
    # CONFIG_NSC_FIR is not set
    # CONFIG_WINBOND_FIR is not set
    # CONFIG_TOSHIBA_FIR is not set
    # CONFIG_SMC_IRCC_FIR is not set
    CONFIG_ALI_FIR=m
    # CONFIG_VLSI_FIR is not set
    # CONFIG_VIA_FIR is not set
    # CONFIG_USB_SERIAL_IR is not set

     Michal
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  • Next message: Paul Mackerras: "Re: 2.6.12-rc2-mm1"

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