Puranjay Mohan 19d3c179a3 bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG ... When BPF_TRAMP_F_CALL_ORIG is set, the trampoline calls __bpf_tramp_enter() and __bpf_tramp_exit() functions, passing them the struct bpf_tramp_image *im pointer as an argument in R0. The trampoline generation code uses emit_addr_mov_i64() to emit instructions for moving the bpf_tramp_image address into R0, but emit_addr_mov_i64() assumes the address to be in the vmalloc() space and uses only 48 bits. Because bpf_tramp_image is allocated using kzalloc(), its address can use more than 48-bits, in this case the trampoline will pass an invalid address to __bpf_tramp_enter/exit() causing a kernel crash. Fix this by using emit_a64_mov_i64() in place of emit_addr_mov_i64() as it can work with addresses that are greater than 48-bits. Fixes: efc9909fdc ("bpf, arm64: Add bpf trampoline for arm64") Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Closes: https://lore.kernel.org/all/SJ0PR15MB461564D3F7E7A763498CA6A8CBDB2@SJ0PR15MB4615.namprd15.prod.outlook.com/ Link: https://lore.kernel.org/bpf/20240711151838.43469-1-puranjay@kernel.org		2024-07-11 17:56:30 +02:00
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bpf_jit_comp.c	bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG	2024-07-11 17:56:30 +02:00
bpf_jit.h	bpf, arm64: inline bpf_get_smp_processor_id() helper	2024-05-12 16:54:34 -07:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00