Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is https://github.com/miquelraynal/linux-0day.git nand/next commit 625608edb698b9e62a9620398ff660659714f92b Author: Miquel Raynal <miquel.raynal(a)bootlin.com&gt; AuthorDate: Thu Aug 27 10:52:05 2020 +0200 Commit: Miquel Raynal <miquel.raynal(a)bootlin.com&gt; CommitDate: Wed Sep 2 09:28:20 2020 +0200 mtd: rawnand: Use the ECC framework OOB layouts No need to have our own in the raw NAND core. Signed-off-by: Miquel Raynal <miquel.raynal(a)bootlin.com&gt; Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-18-miquel.raynal@b... 9b08a7d863 mtd: rawnand: Make use of the ECC framework 625608edb6 mtd: rawnand: Use the ECC framework OOB layouts 2296830e3d mtd: onenand: omap2: Allow for compile-testing on !ARM +-------------------------------------------------------+------------+------------+------------+ | | 9b08a7d863 | 625608edb6 | 2296830e3d | +-------------------------------------------------------+------------+------------+------------+ | boot_successes | 40 | 0 | 0 | | boot_failures | 3 | 23 | 1 | | invoked_oom-killer:gfp_mask=0x | 1 | | | | Mem-Info | 2 | | | | EIP:__put_user_4 | 1 | | | | Initiating_system_reboot | 1 | | | | BUG:unable_to_handle_page_fault_for_address | 0 | 10 | 1 | | Oops:#[##] | 0 | 13 | 1 | | EIP:memcpy | 0 | 14 | 1 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 9 | | | INFO:trying_to_register_non-static_key | 0 | 1 | | | BUG:kernel_NULL_pointer_dereference,address | 0 | 4 | | | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0 | 4 | 1 | | BUG:kernel_reboot-without-warning_in_test_stage | 0 | 8 | | | EIP:run_timer_softirq | 0 | 2 | | | BUG:spinlock_bad_magic_on_CPU | 0 | 1 | | | EIP:lookup_object | 0 | 0 | 1 | +-------------------------------------------------------+------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <lkp(a)intel.com&gt; [ 13.371873] udevd[339]: starting version 175 [ 13.526613] _warn_unseeded_randomness: 601 callbacks suppressed [ 13.526623] random: get_random_u32 called from copy_process+0x240/0x13ab with crng_init=0 [ 13.526836] random: get_random_u32 called from allocate_slab+0x10e/0x374 with crng_init=0 [ 13.529371] random: get_random_u32 called from copy_process+0x240/0x13ab with crng_init=0 [ 14.148526] BUG: unable to handle page fault for address: f71fe000 [ 14.151301] #PF: supervisor read access in kernel mode [ 14.152114] #PF: error_code(0x0000) - not-present page [ 14.152893] *pdpt = 0000000002ba7001 *pde = 0000000003749067 *pte = 0000000000000000 [ 14.154106] Oops: 0000 [#1] SMP [ 14.154629] CPU: 1 PID: 436 Comm: mtd_probe Not tainted 5.9.0-rc2-00017-g625608edb698b9 #1 [ 14.155908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 14.157241] EIP: memcpy+0xf/0x1f [ 14.157766] Code: 88 43 52 5b 5d c3 e8 14 fd ff ff 8b 43 5c 2b 43 54 88 43 52 5b 5d c3 c3 cc cc cc 55 89 e5 57 89 c7 56 89 d6 53 89 cb c1 e9 02 <f3> a5 89 d9 83 e1 03 74 02 f3 a4 5b 5e 5f 5d c3 55 89 e5 57 89 c7 [ 14.160625] EAX: bf98ea44 EBX: fffffffc ECX: 3db28781 EDX: ede9fe06 [ 14.161622] ESI: f71fdffe EDI: c8cecc3c EBP: beffbd2c ESP: beffbd20 [ 14.162603] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010a06 [ 14.163556] CR0: 80050033 CR2: f71fe000 CR3: 7ef24400 CR4: 000006f0 [ 14.164487] Call Trace: [ 14.164857] mtd_ooblayout_get_bytes+0x70/0x8f [ 14.165539] ? get_mtd_device_nm+0x9f/0x9f [ 14.166183] mtd_ooblayout_get_eccbytes+0x13/0x15 [ 14.166919] ? get_mtd_device_nm+0x9f/0x9f [ 14.167565] nand_read_page_swecc+0x90/0x115 [ 14.168250] nand_do_read_ops+0x17e/0x4e5 [ 14.168891] nand_read_oob+0x44/0x24f [ 14.169472] ? find_held_lock+0x24/0x6b [ 14.170081] ? create_object+0x1c8/0x2e3 [ 14.170711] ? nand_do_read_ops+0x4e5/0x4e5 [ 14.171378] mtd_read_oob_std+0x60/0x89 [ 14.171955] mtd_read_oob+0x75/0x10d [ 14.172521] mtd_read+0x49/0x67 [ 14.173019] mtdchar_read+0xf2/0x212 [ 14.173581] ? mtdchar_write+0x211/0x211 [ 14.174194] vfs_read+0x92/0x185 [ 14.174725] ksys_read+0x5c/0xc9 [ 14.175247] __ia32_sys_read+0x10/0x12 [ 14.175845] do_int80_syscall_32+0x27/0x34 [ 14.176494] entry_INT80_32+0x111/0x111 [ 14.177089] EIP: 0x37efd1b2 [ 14.177519] Code: 89 c2 31 c0 89 d7 f3 aa 8b 44 24 1c 89 30 c6 40 04 00 83 c4 2c 89 f0 5b 5e 5f 5d c3 90 90 90 90 90 90 90 90 90 90 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 [ 14.180127] EAX: ffffffda EBX: 00000003 ECX: 004a0008 EDX: 00000200 [ 14.181107] ESI: 004a0008 EDI: 00000000 EBP: 3fc28698 ESP: 3fc28654 [ 14.182067] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246 [ 14.183131] Modules linked in: [ 14.183612] CR2: 00000000f71fe000 [ 14.184136] ---[ end trace 5c769db94eac64db ]--- [ 14.184867] EIP: memcpy+0xf/0x1f # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD git bisect start cb0e49097ccffd20d4cd33a6346740070bab1974 f4d51dffc6c01a9e94650d95ce0104964f8ae822 -- git bisect bad 4577ad883f283c25dd53ef1ab1002eee93e75755 # 22:37 B 2 1 2 4 Merge 'mptcp/export' into devel-catchup-202009072059 git bisect bad 812048bdb9b22d5e0a24588e863eea1d3872ed45 # 22:53 B 6 5 6 8 Merge 'linux-review/Ville-Syrjala/drm-atomic-helper-Extract-drm_atomic_helper_calc_timestamping_constants/20200907-200154' into devel-catchup-202009072059 git bisect good 3265bbfadc6dd6ce90052fe2da9e546b713be32e # 23:24 G 17 0 11 11 Merge 'asoc/for-next' into devel-catchup-202009072059 git bisect bad dff8253a1df95da4dc2f443e9df7f891f4fb3134 # 23:31 B 0 5 14 0 Merge 'ceph-client/testing' into devel-catchup-202009072059 git bisect good da7471d4956496c48046ed6ea6d9594b9351146e # 00:01 G 17 0 10 10 Merge 'renesas-devel/master' into devel-catchup-202009072059 git bisect bad 301a66c61759541231917e71fbc477689595481c # 00:17 B 1 2 1 1 Merge 'miquelraynal/nand/next' into devel-catchup-202009072059 git bisect bad 09f4b18a9b0d0316371391d6c887287a911d9a6e # 00:29 B 5 3 5 5 mtd: rawnand: atmel: Drop redundant nand_read_page_op() git bisect good 8f27947f2ea51f14340c5743ed6c865edaaba372 # 00:56 G 23 0 15 15 mtd: nand: Create a helper to extract the ECC configuration git bisect good 9b08a7d863cc16304a8988b4784487f3e88c310f # 01:21 G 22 0 14 15 mtd: rawnand: Make use of the ECC framework git bisect bad a965a86a8b29381a8ca4b9733f25011b9714380e # 01:36 B 0 1 10 0 mtd: rawnand: Use the ECC framework user input parsing bits git bisect bad 127e7d2f5ac9261ecbfca11d264d6651a60e16f6 # 05:01 B 3 1 3 13 mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper git bisect bad 625608edb698b9e62a9620398ff660659714f92b # 05:20 B 0 1 10 0 mtd: rawnand: Use the ECC framework OOB layouts # first bad commit: [625608edb698b9e62a9620398ff660659714f92b] mtd: rawnand: Use the ECC framework OOB layouts git bisect good 9b08a7d863cc16304a8988b4784487f3e88c310f # 05:32 G 63 0 32 47 mtd: rawnand: Make use of the ECC framework # extra tests with debug options git bisect bad 625608edb698b9e62a9620398ff660659714f92b # 06:07 B 1 1 1 1 mtd: rawnand: Use the ECC framework OOB layouts # extra tests on head commit of miquelraynal/nand/next git bisect bad 2296830e3dae6dcace9e435b6c508a8319d2eaa0 # 07:31 B 0 1 10 0 mtd: onenand: omap2: Allow for compile-testing on !ARM # bad: [2296830e3dae6dcace9e435b6c508a8319d2eaa0] mtd: onenand: omap2: Allow for compile-testing on !ARM --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/lkp@lists.01.org