MC (Midnight Commander 4.6.0 Gentoo) segfaults trying to mmap files
under /proc/bus/pci. The oops, strace output prior the
segfault and the config are attached.
-alex
open("/proc/bus/pci/00/00.0", O_RDONLY|O_NONBLOCK|O_LARGEFILE) = 4
fstat64(4, {st_dev=makedev(0, 3), st_ino=4338, st_mode=S_IFREG|0644, st_nlink=1, st_uid=0, st_gid=0, st_blksize=1024, st_blocks=2, st_size=256, st_atime=2003/05/31-18:26:38, st_mtime=2003/05/31-18:26:38, st_ctime=2003/05/31-18:26:38}) = 0
fcntl64(3, F_GETFL) = 0x2 (flags O_RDWR)
fcntl64(3, F_SETFL, O_RDWR) = 0
read(4, "\6\21\5\6", 4) = 4
mmap2(NULL, 256, PROT_READ, MAP_SHARED, 4, 0 <unfinished ...>
+++ killed by SIGSEGV +++
Unable to handle kernel paging request at virtual address 6b6b6b6f
printing eip:
c0159a79
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[<c0159a79>] Not tainted
EFLAGS: 00010202
EIP is at unmap_vmas+0xf9/0x360
eax: 4048b000 ebx: 00001000 ecx: d9508f90 edx: 6b6b6b6b
esi: 4048b000 edi: 4048b000 ebp: d8cdbef8 esp: d8cdbeb8
ds: 007b es: 007b ss: 0068
Process mc (pid: 18038, threadinfo=d8cda000 task=d5a18100)
Stack: c03b107c d9508f90 4048a000 4048b000 d94cbd54 c780a080 08091630 d8cda000
d8cda000 d94cbd54 4048b000 00000001 000ff000 4048b000 d94cbd54 4048a000
d8cdbf30 c0159dbf d8cdbf1c d94cbd54 d9508f90 4048a000 4048b000 d8cdbf20
Call Trace:
[<c0159dbf>] zap_page_range+0xdf/0x210
[<c015e5ec>] do_mmap_pgoff+0x35c/0x6b0
[<c0112afb>] sys_mmap2+0x9b/0xe0
[<c010a4ab>] syscall_call+0x7/0xb
Code: 39 42 04 72 22 89 f6 89 55 10 85 d2 74 0e 8b 52 04 3b 55 18
<6>note: mc[18038] exited with preempt_count 1
mm/mmap.c:1438: spin_lock(kernel/fork.c:d94cbd98) already locked by mm/memory.c/604
bad: scheduling while atomic!
Call Trace:
[<c011e821>] schedule+0x6d1/0x6e0
[<c010a618>] common_interrupt+0x18/0x20
[<c0159b7e>] unmap_vmas+0x1fe/0x360
[<c015f8e9>] exit_mmap+0xc9/0x2c0
[<c0121ce2>] mmput+0xa2/0x130
[<c01280ef>] do_exit+0x27f/0xaa0
[<c010adec>] die+0x21c/0x220
[<c011c52d>] do_page_fault+0x15d/0x4dc
[<c014817a>] find_get_page+0x7a/0x170
[<c0149707>] filemap_nopage+0x1e7/0x2e0
[<c011c3d0>] do_page_fault+0x0/0x4dc
[<c010a655>] error_code+0x2d/0x38
[<c0159a79>] unmap_vmas+0xf9/0x360
[<c0159dbf>] zap_page_range+0xdf/0x210
[<c015e5ec>] do_mmap_pgoff+0x35c/0x6b0
[<c0112afb>] sys_mmap2+0x9b/0xe0
[<c010a4ab>] syscall_call+0x7/0xb
Debug: sleeping function called from illegal context at include/asm/semaphore.h:119
Call Trace:
[<c0120e81>] __might_sleep+0x61/0x80
[<c015897d>] clear_page_tables+0xad/0xb0
[<c015d779>] remove_shared_vm_struct+0x39/0xa0
[<c015f9fb>] exit_mmap+0x1db/0x2c0
[<c0121ce2>] mmput+0xa2/0x130
[<c01280ef>] do_exit+0x27f/0xaa0
[<c010adec>] die+0x21c/0x220
[<c011c52d>] do_page_fault+0x15d/0x4dc
[<c014817a>] find_get_page+0x7a/0x170
[<c0149707>] filemap_nopage+0x1e7/0x2e0
[<c011c3d0>] do_page_fault+0x0/0x4dc
[<c010a655>] error_code+0x2d/0x38
[<c0159a79>] unmap_vmas+0xf9/0x360
[<c0159dbf>] zap_page_range+0xdf/0x210
[<c015e5ec>] do_mmap_pgoff+0x35c/0x6b0
[<c0112afb>] sys_mmap2+0x9b/0xe0
[<c010a4ab>] syscall_call+0x7/0xb
CONFIG_X86=y
CONFIG_MMU=y
CONFIG_UID16=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_EXPERIMENTAL=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_OBSOLETE_MODPARM=y
CONFIG_KMOD=y
CONFIG_X86_PC=y
CONFIG_MPENTIUMIII=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_L1_CACHE_SHIFT=5
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_PREEMPT=y
CONFIG_X86_TSC=y
CONFIG_X86_MCE=y
CONFIG_X86_MSR=y
CONFIG_EDD=y
CONFIG_NOHIGHMEM=y
CONFIG_MTRR=y
CONFIG_HAVE_DEC_LOCK=y
CONFIG_PM=y
CONFIG_ACPI=y
CONFIG_ACPI_BOOT=y
CONFIG_ACPI_BUTTON=m
CONFIG_ACPI_FAN=m
CONFIG_ACPI_PROCESSOR=m
CONFIG_ACPI_THERMAL=m
CONFIG_ACPI_DEBUG=y
CONFIG_ACPI_BUS=y
CONFIG_ACPI_INTERPRETER=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_PCI=y
CONFIG_ACPI_SYSTEM=y
CONFIG_APM=y
CONFIG_PCI=y
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_LEGACY_PROC=y
CONFIG_PCI_NAMES=y
CONFIG_HOTPLUG=y
CONFIG_KCORE_ELF=y
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_PARPORT_PC_CML1=m
CONFIG_PARPORT_SERIAL=m
CONFIG_PARPORT_PC_FIFO=y
CONFIG_PARPORT_PC_SUPERIO=y
CONFIG_PARPORT_1284=y
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_DEV_LOOP=m
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_IDEDISK_MULTI_MODE=y
CONFIG_BLK_DEV_IDECD=m
CONFIG_BLK_DEV_IDESCSI=m
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_BLK_DEV_GENERIC=y
CONFIG_IDEPCI_SHARE_IRQ=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_BLK_DEV_ADMA=y
CONFIG_BLK_DEV_VIA82CXXX=y
CONFIG_IDEDMA_AUTO=y
CONFIG_BLK_DEV_IDE_MODES=y
CONFIG_SCSI=m
CONFIG_BLK_DEV_SD=m
CONFIG_BLK_DEV_SR=m
CONFIG_CHR_DEV_SG=m
CONFIG_SCSI_MULTI_LUN=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_NETFILTER=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_INET_ECN=y
CONFIG_SYN_COOKIES=y
CONFIG_IP_NF_CONNTRACK=m
CONFIG_IP_NF_FTP=m
CONFIG_IP_NF_IRC=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_LIMIT=m
CONFIG_IP_NF_MATCH_MAC=m
CONFIG_IP_NF_MATCH_PKTTYPE=m
CONFIG_IP_NF_MATCH_MARK=m
CONFIG_IP_NF_MATCH_MULTIPORT=m
CONFIG_IP_NF_MATCH_TOS=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_DSCP=m
CONFIG_IP_NF_MATCH_AH_ESP=m
CONFIG_IP_NF_MATCH_LENGTH=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_MATCH_TCPMSS=m
CONFIG_IP_NF_MATCH_HELPER=m
CONFIG_IP_NF_MATCH_STATE=m
CONFIG_IP_NF_MATCH_CONNTRACK=m
CONFIG_IP_NF_MATCH_UNCLEAN=m
CONFIG_IP_NF_MATCH_OWNER=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_MIRROR=m
CONFIG_IP_NF_NAT=m
CONFIG_IP_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_NAT_SNMP_BASIC=m
CONFIG_IP_NF_NAT_IRC=m
CONFIG_IP_NF_NAT_FTP=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_TOS=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_DSCP=m
CONFIG_IP_NF_TARGET_MARK=m
CONFIG_IP_NF_TARGET_LOG=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_IP_NF_TARGET_TCPMSS=m
CONFIG_IPV6=m
CONFIG_XFRM_USER=m
CONFIG_IPV6_SCTP__=m
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_CSZ=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_QOS=y
CONFIG_NET_ESTIMATOR=y
CONFIG_NET_CLS=y
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_ROUTE=y
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_POLICE=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
CONFIG_TUN=m
CONFIG_NET_ETHERNET=y
CONFIG_MII=m
CONFIG_NET_TULIP=y
CONFIG_DE2104X=m
CONFIG_TULIP=m
CONFIG_TULIP_MWI=y
CONFIG_TULIP_MMIO=y
CONFIG_DE4X5=m
CONFIG_NET_PCI=y
CONFIG_NATSEMI=m
CONFIG_8139TOO=m
CONFIG_8139TOO_TUNE_TWISTER=y
CONFIG_8139TOO_8129=y
CONFIG_INPUT=y
CONFIG_INPUT_MOUSEDEV=m
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_EVDEV=m
CONFIG_SOUND_GAMEPORT=y
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=m
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_PCSPKR=y
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
CONFIG_RTC=m
CONFIG_GEN_RTC=m
CONFIG_GEN_RTC_X=y
CONFIG_AGP=m
CONFIG_AGP_VIA=m
CONFIG_DRM=y
CONFIG_DRM_RADEON=m
CONFIG_HANGCHECK_TIMER=m
CONFIG_EXT2_FS=y
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_JBD=y
CONFIG_FS_MBCACHE=y
CONFIG_REISERFS_FS=m
CONFIG_AUTOFS4_FS=m
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_ZISOFS_FS=m
CONFIG_UDF_FS=m
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_NTFS_FS=m
CONFIG_PROC_FS=y
CONFIG_DEVPTS_FS=y
CONFIG_TMPFS=y
CONFIG_RAMFS=y
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
CONFIG_NFSD=m
CONFIG_NFSD_V3=y
CONFIG_LOCKD=m
CONFIG_LOCKD_V4=y
CONFIG_EXPORTFS=m
CONFIG_SUNRPC=m
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=y
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_15=y
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_UTF8=m
CONFIG_VIDEO_SELECT=y
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_SOUND=m
CONFIG_SND=m
CONFIG_SND_SEQUENCER=m
CONFIG_SND_SEQ_DUMMY=m
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=m
CONFIG_SND_DUMMY=m
CONFIG_SND_VIRMIDI=m
CONFIG_SND_ENS1371=m
CONFIG_SOUND_PRIME=m
CONFIG_USB=m
CONFIG_USB_DEVICEFS=y
CONFIG_USB_UHCI_HCD=m
CONFIG_USB_PRINTER=m
CONFIG_USB_STORAGE=m
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_DPCM=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_HID=m
CONFIG_USB_HIDINPUT=y
CONFIG_USB_SCANNER=m
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_SLAB=y
CONFIG_DEBUG_IOVIRT=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_KALLSYMS=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
CONFIG_FRAME_POINTER=y
CONFIG_CRC32=m
CONFIG_ZLIB_INFLATE=m
CONFIG_X86_BIOS_REBOOT=y
Alex Riesen <[email protected]> wrote:
>
> MC (Midnight Commander 4.6.0 Gentoo) segfaults trying to mmap files
> under /proc/bus/pci.
Thanks. This will fix it up.
It's pretty lame. Really we need a proper vma constructor
somewhere.
diff -puN mm/mmap.c~pci-mmap-fix mm/mmap.c
--- 25/mm/mmap.c~pci-mmap-fix 2003-05-31 19:49:20.000000000 -0700
+++ 25-akpm/mm/mmap.c 2003-05-31 19:49:35.000000000 -0700
@@ -677,6 +677,7 @@ munmap_back:
vma->vm_pgoff = pgoff;
vma->vm_file = NULL;
vma->vm_private_data = NULL;
+ vma->vm_next = NULL;
INIT_LIST_HEAD(&vma->shared);
if (file) {
_
Andrew Morton, Sun, Jun 01, 2003 04:54:14 +0200:
> >
> > MC (Midnight Commander 4.6.0 Gentoo) segfaults trying to mmap files
> > under /proc/bus/pci.
>
> Thanks. This will fix it up.
>
it did, of course.