Re: [PATCH bpf] bpf: Fix use after free in subprog's jited symbol removal

2019-10-22 Thread Alexei Starovoitov
On Tue, Oct 22, 2019 at 6:57 AM Daniel Borkmann wrote: > > syzkaller managed to trigger the following crash: > > [...] > BUG: unable to handle page fault for address: c90001923030 > #PF: supervisor read access in kernel mode > #PF: error_code(0x) - not-present page > PGD aa551067

[PATCH bpf] bpf: Fix use after free in subprog's jited symbol removal

2019-10-22 Thread Daniel Borkmann
syzkaller managed to trigger the following crash: [...] BUG: unable to handle page fault for address: c90001923030 #PF: supervisor read access in kernel mode #PF: error_code(0x) - not-present page PGD aa551067 P4D aa551067 PUD aa552067 PMD a572b067 PTE 8000a1173163 Oops: 00