Buildresult: powerpc-next/85xx/mpc85xx_cds_defconfig/powerpc-gcc4.6 built on Jun 8 2019, 01:02
kisskb
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Status:
OK
Date/Time:
Jun 8 2019, 01:02
Duration:
0:00:37.724142
Builder:
ka3
Revision:
powerpc/pseries/hvconsole: Fix stack overread via udbg (
6754297c2924cd55843499bc2bb338843177931f)
Target:
powerpc-next/85xx/mpc85xx_cds_defconfig/powerpc-gcc4.6
Branch:
powerpc-next
Compiler:
powerpc-gcc4.6
(powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:
85xx/mpc85xx_cds_defconfig
(
download
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Log:
Download original
Possible warnings (5)
kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] arch/powerpc/boot/dts/fsl/mpc8541cds.dts:334.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/dts/fsl/mpc8555cds.dts:334.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0)
Full Log
# git rev-parse -q --verify 6754297c2924cd55843499bc2bb338843177931f^{commit} 6754297c2924cd55843499bc2bb338843177931f already have revision, skipping fetch # git checkout -q -f -B kisskb 6754297c2924cd55843499bc2bb338843177931f # git clean -qxdf # < git log -1 # commit 6754297c2924cd55843499bc2bb338843177931f # Author: Daniel Axtens <dja@axtens.net> # Date: Mon Jun 3 16:56:57 2019 +1000 # # powerpc/pseries/hvconsole: Fix stack overread via udbg # # While developing KASAN for 64-bit book3s, I hit the following stack # over-read. # # It occurs because the hypercall to put characters onto the terminal # takes 2 longs (128 bits/16 bytes) of characters at a time, and so # hvc_put_chars() would unconditionally copy 16 bytes from the argument # buffer, regardless of supplied length. However, udbg_hvc_putc() can # call hvc_put_chars() with a single-byte buffer, leading to the error. # # ================================================================== # BUG: KASAN: stack-out-of-bounds in hvc_put_chars+0xdc/0x110 # Read of size 8 at addr c0000000023e7a90 by task swapper/0 # # CPU: 0 PID: 0 Comm: swapper Not tainted 5.2.0-rc2-next-20190528-02824-g048a6ab4835b #113 # Call Trace: # dump_stack+0x104/0x154 (unreliable) # print_address_description+0xa0/0x30c # __kasan_report+0x20c/0x224 # kasan_report+0x18/0x30 # __asan_report_load8_noabort+0x24/0x40 # hvc_put_chars+0xdc/0x110 # hvterm_raw_put_chars+0x9c/0x110 # udbg_hvc_putc+0x154/0x200 # udbg_write+0xf0/0x240 # console_unlock+0x868/0xd30 # register_console+0x970/0xe90 # register_early_udbg_console+0xf8/0x114 # setup_arch+0x108/0x790 # start_kernel+0x104/0x784 # start_here_common+0x1c/0x534 # # Memory state around the buggy address: # c0000000023e7980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 # c0000000023e7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 # >c0000000023e7a80: f1 f1 01 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 # ^ # c0000000023e7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 # c0000000023e7b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 # ================================================================== # # Document that a 16-byte buffer is requred, and provide it in udbg. # # Signed-off-by: Daniel Axtens <dja@axtens.net> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 6754297c2924cd55843499bc2bb338843177931f # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- 85xx/mpc85xx_cds_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:331:21: note: 'pdeo' was declared here /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:334.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:334.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0x51a434) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x51a434) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x51a434) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x509d74) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.2.0-rc2-g6754297c2924 Created: Sat Jun 8 01:03:32 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2583326 Bytes = 2522.78 KiB = 2.46 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.2.0-rc2-g6754297c2924 Created: Sat Jun 8 01:03:32 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2613621 Bytes = 2552.36 KiB = 2.49 MiB Load Address: 00600000 Entry Point: 006002a8 Image Name: Linux-5.2.0-rc2-g6754297c2924 Created: Sat Jun 8 01:03:32 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2614239 Bytes = 2552.97 KiB = 2.49 MiB Load Address: 00600000 Entry Point: 006002a8 Image Name: Linux-5.2.0-rc2-g6754297c2924 Created: Sat Jun 8 01:03:32 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2613143 Bytes = 2551.90 KiB = 2.49 MiB Load Address: 00600000 Entry Point: 006002a8 Completed OK # rm -rf /kisskb/build/powerpc-next_85xx_mpc85xx_cds_defconfig_powerpc-gcc4.6 # Build took: 0:00:37.724142
© Michael Ellerman 2006-2018.