Hi Andreas, On Fri, 11 Jun 2021 16:10:03 +0200 Andreas Schwab <schwab@xxxxxxxxxxxxxx> wrote: > On Mär 30 2021, Jisheng Zhang wrote: > > > From: Jisheng Zhang <jszhang@xxxxxxxxxx> > > > > We allocate Non-executable pages, then call bpf_jit_binary_lock_ro() > > to enable executable permission after mapping them read-only. This is > > to prepare for STRICT_MODULE_RWX in following patch. > > That breaks booting with > <https://github.com/openSUSE/kernel-source/blob/master/config/riscv64/default>. > Thanks for the bug report. I reproduced an kernel panic with the defconfig on qemu, but I'm not sure whether this is the issue you saw, I will check. 0.161959] futex hash table entries: 512 (order: 3, 32768 bytes, linear) [ 0.167028] pinctrl core: initialized pinctrl subsystem [ 0.190727] Unable to handle kernel paging request at virtual address ffffffff81651bd8 [ 0.191361] Oops [#1] [ 0.191509] Modules linked in: [ 0.191814] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.13.0-rc5-default+ #3 [ 0.192179] Hardware name: riscv-virtio,qemu (DT) [ 0.192492] epc : __memset+0xc4/0xfc [ 0.192712] ra : skb_flow_dissector_init+0x22/0x86 [ 0.192915] epc : ffffffff803e2700 ra : ffffffff8058f90c sp : ffffffe001a4fda0 [ 0.193221] gp : ffffffff8156d120 tp : ffffffe001a5b700 t0 : ffffffff81651b10 [ 0.193631] t1 : 0000000000000100 t2 : 00000000000003a8 s0 : ffffffe001a4fdd0 [ 0.194034] s1 : ffffffff80c9e250 a0 : ffffffff81651bd8 a1 : 0000000000000000 [ 0.194502] a2 : 000000000000003c a3 : ffffffff81651c10 a4 : 0000000000000064 [ 0.195053] a5 : ffffffff803e2700 a6 : 0000000000000040 a7 : 0000000000000002 [ 0.195436] s2 : ffffffff81651bd8 s3 : 0000000000000009 s4 : ffffffff8156e0c8 [ 0.195723] s5 : ffffffff8156e050 s6 : ffffffff80a105e0 s7 : ffffffff80a00738 [ 0.195992] s8 : ffffffff80f07be0 s9 : 0000000000000008 s10: ffffffff808000ac [ 0.196257] s11: 0000000000000000 t3 : fffffffffffffffc t4 : 0000000000000000 [ 0.196511] t5 : 00000000000003a9 t6 : 00000000000003ff [ 0.196714] status: 0000000000000120 badaddr: ffffffff81651bd8 cause: 000000000000000f [ 0.197103] [<ffffffff803e2700>] __memset+0xc4/0xfc [ 0.197408] [<ffffffff80831f58>] init_default_flow_dissectors+0x22/0x60 [ 0.197693] [<ffffffff800020fc>] do_one_initcall+0x3e/0x168 [ 0.197907] [<ffffffff80801438>] kernel_init_freeable+0x25a/0x2c6 [ 0.198157] [<ffffffff8070a8a8>] kernel_init+0x12/0x110 [ 0.198351] [<ffffffff8000333a>] ret_from_exception+0x0/0xc [ 0.198973] Unable to handle kernel paging request at virtual address ffffffff8164d860 [ 0.199242] Oops [#2] [ 0.199336] Modules linked in: [ 0.199514] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G D 5.13.0-rc5-default+ #3 [ 0.199785] Hardware name: riscv-virtio,qemu (DT) [ 0.199940] epc : _raw_spin_lock_irqsave+0x14/0x4e [ 0.200113] ra : _extract_crng+0x58/0xac [ 0.200264] epc : ffffffff807117ae ra : ffffffff80490774 sp : ffffffe001a4fa70 [ 0.200489] gp : ffffffff8156d120 tp : ffffffe001a5b700 t0 : ffffffff8157c0d7 [ 0.200715] t1 : ffffffff8157c0c8 t2 : 0000000000000000 s0 : ffffffe001a4fa80 [ 0.200938] s1 : ffffffff8164d818 a0 : 0000000000000022 a1 : ffffffe001a4fac8 [ 0.201166] a2 : 0000000000000010 a3 : 0000000000000001 a4 : ffffffff8164d860 [ 0.201389] a5 : 0000000000000000 a6 : c0000000ffffdfff a7 : ffffffffffffffff [ 0.201612] s2 : ffffffff8156e1c0 s3 : ffffffe001a4fac8 s4 : ffffffff8164d860 [ 0.201836] s5 : ffffffff8156e0c8 s6 : ffffffff80a105e0 s7 : ffffffff80a00738 [ 0.202060] s8 : ffffffff80f07be0 s9 : 0000000000000008 s10: ffffffff808000ac [ 0.202295] s11: 0000000000000000 t3 : 000000000000005b t4 : ffffffffffffffff [ 0.202519] t5 : 00000000000003a9 t6 : ffffffe001a4f9b8 [ 0.202691] status: 0000000000000100 badaddr: ffffffff8164d860 cause: 000000000000000f [ 0.202940] [<ffffffff807117ae>] _raw_spin_lock_irqsave+0x14/0x4e [ 0.203326] Unable to handle kernel paging request at virtual address ffffffff8164d860 [ 0.203574] Oops [#3] [ 0.203664] Modules linked in: [ 0.203784] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G D 5.13.0-rc5-default+ #3 [ 0.204046] Hardware name: riscv-virtio,qemu (DT) [ 0.204201] epc : _raw_spin_lock_irqsave+0x14/0x4e [ 0.204371] ra : _extract_crng+0x58/0xac [ 0.204519] epc : ffffffff807117ae ra : ffffffff80490774 sp : ffffffe001a4f740 [ 0.204819] gp : ffffffff8156d120 tp : ffffffe001a5b700 t0 : ffffffff8157c0d7 [ 0.205089] t1 : ffffffff8157c0c8 t2 : 0000000000000000 s0 : ffffffe001a4f750 [ 0.205330] s1 : ffffffff8164d818 a0 : 0000000000000102 a1 : ffffffe001a4f798 [ 0.205553] a2 : 0000000000000010 a3 : 0000000000000001 a4 : ffffffff8164d860 [ 0.205768] a5 : 0000000000000000 a6 : c0000000ffffdfff a7 : ffffffff81408a40 [ 0.205981] s2 : ffffffff8156e1c0 s3 : ffffffe001a4f798 s4 : ffffffff8164d860 [ 0.206197] s5 : ffffffff8156e0c8 s6 : ffffffff80a105e0 s7 : ffffffff80a00738 [ 0.206411] s8 : ffffffff80f07be0 s9 : 0000000000000008 s10: ffffffff808000ac [ 0.206633] s11: 0000000000000000 t3 : 000000000000005b t4 : ffffffffffffffff [ 0.206849] t5 : 00000000000003a9 t6 : ffffffe001a4f688
