On 19/06/2019 13:16, Ard Biesheuvel wrote: >> Try >> cryptsetup open --type plain -c null /dev/sdd test -q >> or >> dmsetup create test --table " 0 417792 crypt cipher_null-ecb - 0 /dev/sdd 0" >> >> (or just run full cryptsetup testsuite) >> > > Is that your mode-test script? > > I saw some errors about the null cipher, but tbh, it looked completely > unrelated to me, so i skipped those for the moment. But now, it looks > like it is related after all. This was triggered by align-test, mode-test fails the same though. It is definitely related, I think you just changed the mode parsing in dm-crypt. (cipher null contains only one dash I guess). m. > > >> kernel: BUG: kernel NULL pointer dereference, address: 00000000 >> kernel: #PF: supervisor read access in kernel mode >> kernel: #PF: error_code(0x0000) - not-present page >> kernel: *pde = 00000000 >> kernel: Oops: 0000 [#1] PREEMPT SMP >> kernel: CPU: 2 PID: 2261 Comm: cryptsetup Not tainted 5.2.0-rc5+ #521 >> kernel: Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 04/13/2018 >> kernel: EIP: strcmp+0x9/0x20 >> kernel: Code: 00 55 89 c1 89 e5 57 89 c7 56 89 d6 ac aa 84 c0 75 fa 5e 89 c8 5f 5d c3 8d b4 26 00 00 00 00 66 90 55 89 e5 57 89 d7 56 89 c6 <ac> ae 75 08 84 c0 75 f8 31 c0 eb 04 19 c0 0c 01 5e 5f 5d c3 8d 76 >> kernel: EAX: 00000000 EBX: ef51016c ECX: 0000000c EDX: f78e585e >> kernel: ESI: 00000000 EDI: f78e585e EBP: f238dcb0 ESP: f238dca8 >> kernel: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00210282 >> kernel: CR0: 80050033 CR2: 00000000 CR3: 30a28000 CR4: 00140690 >> kernel: Call Trace: >> kernel: crypt_ctr+0x473/0xf4e [dm_crypt] >> kernel: dm_table_add_target+0x15f/0x340 [dm_mod] >> kernel: table_load+0xe9/0x280 [dm_mod] >> kernel: ? retrieve_status+0x200/0x200 [dm_mod] >> kernel: ctl_ioctl+0x1c8/0x400 [dm_mod] >> kernel: ? retrieve_status+0x200/0x200 [dm_mod] >> kernel: ? ctl_ioctl+0x400/0x400 [dm_mod] >> kernel: dm_ctl_ioctl+0x8/0x10 [dm_mod] >> kernel: do_vfs_ioctl+0x3dd/0x790 >> kernel: ? trace_hardirqs_on+0x4a/0xf0 >> kernel: ? ksys_old_semctl+0x27/0x30 >> kernel: ksys_ioctl+0x2e/0x60 >> kernel: ? mpihelp_add_n+0x39/0x50 >> kernel: sys_ioctl+0x11/0x20 >> kernel: do_int80_syscall_32+0x4b/0x1a0 >> kernel: ? mpihelp_add_n+0x39/0x50 >> kernel: entry_INT80_32+0xcf/0xcf >> kernel: EIP: 0xb7f5bbf2 >> kernel: Code: de 01 00 05 ed 73 02 00 83 ec 14 8d 80 0c ac ff ff 50 6a 02 e8 5f 12 01 00 c7 04 24 7f 00 00 00 e8 ce cd 01 00 66 90 90 cd 80 <c3> 8d b6 00 00 00 00 8d bc 27 00 00 00 00 8b 1c 24 c3 8d b6 00 00 >> kernel: EAX: ffffffda EBX: 00000005 ECX: c138fd09 EDX: 00511080 >> kernel: ESI: b7b83d40 EDI: b7b785af EBP: 0050dda0 ESP: bf9e1c34 >> kernel: DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00200286 >> kernel: ? mpihelp_add_n+0x39/0x50 >> kernel: Modules linked in: dm_crypt loop dm_mod pktcdvd crc32_pclmul crc32c_intel aesni_intel aes_i586 crypto_simd cryptd ata_piix >> kernel: CR2: 0000000000000000 >> kernel: ---[ end trace 0d32231f952fd372 ]--- >> >> m.
