diff options
| author | Andrea Righi <[email protected]> | 2024-12-17 19:58:13 +0000 |
|---|---|---|
| committer | Andrii Nakryiko <[email protected]> | 2024-12-18 00:09:24 +0000 |
| commit | 23579010cf0a12476e96a5f1acdf78a9c5843657 (patch) | |
| tree | 301e0adb9b91129f0276a2a66e66d252da1e10b9 /net/ipv4/tcp_bpf.c | |
| parent | Linux 6.13-rc3 (diff) | |
| download | kernel-23579010cf0a12476e96a5f1acdf78a9c5843657.tar.gz kernel-23579010cf0a12476e96a5f1acdf78a9c5843657.zip | |
bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP
On x86-64 calling bpf_get_smp_processor_id() in a kernel with CONFIG_SMP
disabled can trigger the following bug, as pcpu_hot is unavailable:
[ 8.471774] BUG: unable to handle page fault for address: 00000000936a290c
[ 8.471849] #PF: supervisor read access in kernel mode
[ 8.471881] #PF: error_code(0x0000) - not-present page
Fix by inlining a return 0 in the !CONFIG_SMP case.
Fixes: 1ae6921009e5 ("bpf: inline bpf_get_smp_processor_id() helper")
Signed-off-by: Andrea Righi <[email protected]>
Signed-off-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'net/ipv4/tcp_bpf.c')
0 files changed, 0 insertions, 0 deletions