On Wed, 11 Nov 2020 at 07:13, Naresh Kamboju naresh.kamboju@linaro.org wrote:
The following kernel warning noticed on arm KASAN enabled config while booting.
[ 0.000000] Linux version 5.10.0-rc3-next-20201110 (tuxmake@e15fe3b4fdc6) (arm-linux-gnueabihf-gcc (Debian 9.3.0-13) 9.3.0, GNU ld (GNU Binutils for Debian) 2.35.1) #2 SMP Tue Nov 10 07:49:47 UTC 2020 [ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
<trim> [ 0.000000] kasan: Truncating shadow for memory block at 0x40000000-0xffffffff to lowmem region at 0x70000000 [ 0.000000] kasan: Mapping kernel virtual memory block: c0000000-f0000000 at shadow: b7000000-bd000000 [ 0.000000] kasan: Mapping kernel virtual memory block: bf000000-c0000000 at shadow: b6e00000-b7000000 [ 0.000000] kasan: Kernel address sanitizer initialized <trim> [ 0.000000] ftrace: allocating 57178 entries in 112 pages [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/arm/kernel/insn.c:47 __arm_gen_branch+0x78/0x80 [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.0-rc3-next-20201110 #2 [ 0.000000] Hardware name: Generic DT based system [ 0.000000] Backtrace: [ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>] (show_stack+0x20/0x24) [ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3 r5:00000000 r4:c3023060 [ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>] (dump_stack+0xe8/0x10c) [ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164) [ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009 r6:c031986c r5:0000002f [ 0.000000] r4:c1a0bbe0 r3:c2e06f50 [ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>] (warn_slowpath_fmt+0xc0/0x128) [ 0.000000] r9:c031986c r8:0000002f r7:c1a0bbe0 r6:00000000 r5:c2e03ec0 r4:b75c07cc [ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c031986c>] (__arm_gen_branch+0x78/0x80) [ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c2e070a0 r6:c400c108 r5:c0319250 [ 0.000000] r4:00000000 [ 0.000000] [<c03197f4>] (__arm_gen_branch) from [<c0319720>] (ftrace_make_nop+0x30/0x48) [ 0.000000] r5:c0319250 r4:c2b00354 [ 0.000000] [<c03196f0>] (ftrace_make_nop) from [<c04ac104>] (ftrace_process_locs+0x470/0x5f0) [ 0.000000] r5:00001248 r4:c400c100 [ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>] (ftrace_init+0xa8/0x158) [ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230 r6:00000001 r5:c2e070a0 [ 0.000000] r4:c37f5c40 [ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>] (start_kernel+0x174/0x3f8) [ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00 r5:c37c0000 r4:ffffffff [ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0) [ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d r5:00000051 r4:c2b00334 [ 0.000000] random: get_random_bytes called from print_oops_end_marker+0x30/0xa0 with crng_init=0 [ 0.000000] ---[ end trace 0000000000000000 ]--- [ # 0.000000] ------------[ ftrace bug ]------------ [ 0.000000] ftrace failed to modify [ 0.000000] [<c2b00354>] set_reset_devices+0x10/0x28 [ 0.000000] actual: 0a:3d:04:eb [ 0.000000] Initializing ftrace call sites [ 0.000000] ftrace record flags: 0 [ 0.000000] (0) [ 0.000000] expected tramp: c031925c [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: CPU: 0 PID: 0 at kernel/trace/ftrace.c:2065 ftrace_bug+0x218/0x280 [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G W 5.10.0-rc3-next-20201110 #2 [ 0.000000] Hardware name: Generic DT based system [ 0.000000] Backtrace: [ 0.000000] [<c199f710>] (dump_backtrace) from [<c199fb94>] (show_stack+0x20/0x24) [ 0.000000] r9:00000080 r8:c2e00000 r7:c3023060 r6:600000d3 r5:00000000 r4:c3023060 [ 0.000000] [<c199fb74>] (show_stack) from [<c19a7ad0>] (dump_stack+0xe8/0x10c) [ 0.000000] [<c19a79e8>] (dump_stack) from [<c0366518>] (__warn+0x140/0x164) [ 0.000000] r10:00000009 r9:00000000 r8:c2e0e000 r7:00000009 r6:c19a3790 r5:00000811 [ 0.000000] r4:c1a863c0 r3:c2e06f50 [ 0.000000] [<c03663d8>] (__warn) from [<c19a13ac>] (warn_slowpath_fmt+0xc0/0x128) [ 0.000000] r9:c19a3790 r8:00000811 r7:c1a863c0 r6:00000000 r5:c2e03ee0 r4:b75c07d0 [ 0.000000] [<c19a12f0>] (warn_slowpath_fmt) from [<c19a3790>] (ftrace_bug+0x218/0x280) [ 0.000000] r10:0000d247 r9:c4019238 r8:c400c104 r7:c37f5c40 r6:c1a86960 r5:c401923c [ 0.000000] r4:c4019238 [ 0.000000] [<c19a3578>] (ftrace_bug) from [<c04abfc0>] (ftrace_process_locs+0x32c/0x5f0) [ 0.000000] r7:c2e070a0 r6:c400c108 r5:00001248 r4:c400c100 [ 0.000000] [<c04abc94>] (ftrace_process_locs) from [<c2b2d8f4>] (ftrace_init+0xa8/0x158) [ 0.000000] r10:10c5387d r9:c1a87768 r8:c2cb9f98 r7:c2c82230 r6:00000001 r5:c2e070a0 [ 0.000000] r4:c37f5c40 [ 0.000000] [<c2b2d84c>] (ftrace_init) from [<c2b010ec>] (start_kernel+0x174/0x3f8) [ 0.000000] r9:00000001 r8:c2e06f00 r7:00000000 r6:c2e06f00 r5:c37c0000 r4:ffffffff [ 0.000000] [<c2b00f78>] (start_kernel) from [<00000000>] (0x0) [ 0.000000] r9:410fd034 r8:48000000 r7:ffffffff r6:10c0387d r5:00000051 r4:c2b00334 [ 0.000000] ---[ end trace f68728a0d3053b52 ]--- [ 0.000000] ftrace: allocated 112 pages with 3 groups
metadata: git branch: master git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git describe: next-20201110 make_kernelversion: 5.10.0-rc3 build : https://builds.tuxbuild.com/1k5bYasxkHF7omMh7mjtxjRtkMe/
The qemu boot command,
/usr/bin/qemu-system-aarch64 -cpu host,aarch64=off -machine virt-2.10,accel=kvm -nographic -net nic,model=virtio,macaddr=BA:DD:AD:CC:09:03 -net tap -m 2048 -monitor none -kernel kernel/zImage --append "console=ttyAMA0 root=/dev/vda rw" -hda rpb-console-image-lkft-am57xx-evm-20201022181203-3085.rootfs.ext4 -m 4096 -smp 2 -nographic
Full log: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20201110/tes...
The kernel you are building is too big.
An ordinary multi_v7_defconfig+thumb2 has
(10240K kernel code, 2232K rwdata, 5344K rodata, 2048K init, 441K bss, 144040K reserved, 65536K cma-reserved, 3340512K highmem)
whereas your kernel has
(23552K kernel code, 9970K rwdata, 16736K rodata, 3072K init, 4849K bss, 189072K reserved, 65536K cma-reserved, 2293756K highmem)
and so the kernel text section is too large to resolve relative branches.
Which config are you building?