* Re: CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race [not found] <2024030253-CVE-2023-52521-d847@gregkh> @ 2024-03-05 16:54 ` Michal Hocko 2024-03-05 22:22 ` Greg Kroah-Hartman 0 siblings, 1 reply; 2+ messages in thread From: Michal Hocko @ 2024-03-05 16:54 UTC (permalink / raw) To: cve, linux-kernel; +Cc: Greg Kroah-Hartman On Sat 02-03-24 22:53:05, Greg KH wrote: > Description > =========== > > In the Linux kernel, the following vulnerability has been resolved: > > bpf: Annotate bpf_long_memcpy with data_race > > syzbot reported a data race splat between two processes trying to > update the same BPF map value via syscall on different CPUs: > > BUG: KCSAN: data-race in bpf_percpu_array_update / bpf_percpu_array_update I would like to dispute this CVE. It adds data_race annotation which doesn't have any impact on the code generation. -- Michal Hocko SUSE Labs ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race 2024-03-05 16:54 ` CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race Michal Hocko @ 2024-03-05 22:22 ` Greg Kroah-Hartman 0 siblings, 0 replies; 2+ messages in thread From: Greg Kroah-Hartman @ 2024-03-05 22:22 UTC (permalink / raw) To: Michal Hocko; +Cc: cve, linux-kernel On Tue, Mar 05, 2024 at 05:54:45PM +0100, Michal Hocko wrote: > On Sat 02-03-24 22:53:05, Greg KH wrote: > > Description > > =========== > > > > In the Linux kernel, the following vulnerability has been resolved: > > > > bpf: Annotate bpf_long_memcpy with data_race > > > > syzbot reported a data race splat between two processes trying to > > update the same BPF map value via syscall on different CPUs: > > > > BUG: KCSAN: data-race in bpf_percpu_array_update / bpf_percpu_array_update > > I would like to dispute this CVE. It adds data_race annotation which > doesn't have any impact on the code generation. Ah, my fault, I thought the "BUG: KCSAN:" line was a real BUG() call, it's just a syslog dump, good catch. I'll go revoke this now, thanks for the review! greg k-h ^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <2024030253-CVE-2023-52521-d847@gregkh>
2024-03-05 16:54 ` CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race Michal Hocko
2024-03-05 22:22 ` Greg Kroah-Hartman
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