Li Huafei cbc32023dd RISC-V: kexec: Fix memory leak of elf header buffer ... This is reported by kmemleak detector: unreferenced object 0xff2000000403d000 (size 4096): comm "kexec", pid 146, jiffies 4294900633 (age 64.792s) hex dump (first 32 bytes): 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 .ELF............ 04 00 f3 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000566ca97c>] kmemleak_vmalloc+0x3c/0xbe [<00000000979283d8>] __vmalloc_node_range+0x3ac/0x560 [<00000000b4b3712a>] __vmalloc_node+0x56/0x62 [<00000000854f75e2>] vzalloc+0x2c/0x34 [<00000000e9a00db9>] crash_prepare_elf64_headers+0x80/0x30c [<0000000067e8bf48>] elf_kexec_load+0x3e8/0x4ec [<0000000036548e09>] kexec_image_load_default+0x40/0x4c [<0000000079fbe1b4>] sys_kexec_file_load+0x1c4/0x322 [<0000000040c62c03>] ret_from_syscall+0x0/0x2 In elf_kexec_load(), a buffer is allocated via vzalloc() to store elf headers. While it's not freed back to system when kdump kernel is reloaded or unloaded, or when image->elf_header is successfully set and then fails to load kdump kernel for some reason. Fix it by freeing the buffer in arch_kimage_file_post_load_cleanup(). Fixes: 8acea455fa ("RISC-V: Support for kexec_file on panic") Signed-off-by: Li Huafei <lihuafei1@huawei.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20221104095658.141222-2-lihuafei1@huawei.com Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2022-12-05 10:59:58 -08:00
..
boot	RISC-V Patches for the 6.1 Merge Window, Part 2	2022-10-14 11:21:11 -07:00
configs	RISC-V: defconfig: Enable CONFIG_SERIAL_8250_DW	2022-12-02 10:24:13 -08:00
errata	drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores	2022-10-27 14:35:20 -07:00
include	RISC-V: kexec: Fix memory leak of fdt buffer	2022-12-05 10:59:51 -08:00
kernel	RISC-V: kexec: Fix memory leak of elf header buffer	2022-12-05 10:59:58 -08:00
kvm	The first batch of KVM patches, mostly covering x86, which I	2022-10-09 09:39:55 -07:00
lib	riscv: lib: uaccess: fix CSR_STATUS SR_SUM bit	2022-08-10 14:06:31 -07:00
mm	riscv/mm: hugepage's PG_dcache_clean flag is only set in head page	2022-12-02 11:25:49 -08:00
net	bpf, riscv: Support riscv jit to provide bpf_line_info	2022-06-02 16:26:01 -07:00
purgatory	riscv/purgatory: Omit use of bin2c	2022-08-11 09:32:34 -07:00
Kbuild	riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild	2022-06-01 22:26:32 -07:00
Kconfig	riscv: add riscv rethook implementation	2022-12-02 13:04:05 -08:00
Kconfig.debug	RISC-V: Remove EARLY_PRINTK support	2018-12-17 10:23:46 -08:00
Kconfig.erratas	drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores	2022-10-27 14:35:20 -07:00
Kconfig.socs	riscv: Kconfig: Style cleanups	2022-06-30 19:26:16 -07:00
Makefile	RISC-V Patches for the 6.1 Merge Window, Part 2	2022-10-14 11:21:11 -07:00