FYI, we noticed the below changes on https://github.com/0day-ci/linux Deepa-Dinamani/Remove-CURRENT_TIME-and-CURRENT_TIME_SEC-PART-1/20160203-141501 commit e17f2e4fa7e7d9e851085009f70902973fe4005e ("fs: btrfs: Replace CURRENT_TIME by current_fs_time()") +------------------------------------------+------------+------------+ | | 3fa5374a4d | e17f2e4fa7 | +------------------------------------------+------------+------------+ | boot_successes | 4 | 4 | | boot_failures | 1 | 4 | | BUG:kernel_test_hang | 1 | | | BUG:unable_to_handle_kernel | 0 | 4 | | Oops | 0 | 4 | | RIP:btrfs_update_root_times[btrfs] | 0 | 4 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 4 | | backtrace:vfs_mkdir | 0 | 4 | | backtrace:SyS_mkdirat | 0 | 4 | | backtrace:SyS_mkdir | 0 | 4 | +------------------------------------------+------------+------------+ [ 639.124909] BTRFS info (device vda): disk space caching is enabled [ 639.126317] BTRFS: flagging fs with big metadata feature [ 639.132163] BTRFS: creating UUID tree [ 640.326431] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 640.328677] IP: [] btrfs_update_root_times+0x1f/0x6b [btrfs] [ 640.330723] PGD 3ef9a067 PUD 3ef80067 PMD 0 [ 640.331879] Oops: 0000 [#1] SMP [ 640.332892] Modules linked in: btrfs acpi_cpufreq processor [ 640.334252] CPU: 0 PID: 2615 Comm: mkdir Not tainted 4.4.0-00026-ge17f2e4 #1 [ 640.335747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 640.338035] task: ffff88003efdbc00 ti: ffff88003ea00000 task.ti: ffff88003ea00000 [ 640.340030] RIP: 0010:[] [] btrfs_update_root_times+0x1f/0x6b [btrfs] [ 640.342441] RSP: 0018:ffff88003ea03d68 EFLAGS: 00010286 [ 640.343650] RAX: 0000000000000000 RBX: ffff88003eed2000 RCX: ffff88001db228c8 [ 640.345164] RDX: 0000000000000000 RSI: ffff88003eed2000 RDI: ffff88001db33000 [ 640.346629] RBP: ffff88003ea03d90 R08: 0000000000000006 R09: ffffffffa001d333 [ 640.348080] R10: ffff88003e8eb300 R11: ffffea000076cc00 R12: ffff88001db301b0 [ 640.349572] R13: ffff88003eed2000 R14: ffff88001db33000 R15: 0000000000003e44 [ 640.351003] FS: 00007f64a4146800(0000) GS:ffff880038600000(0000) knlGS:0000000000000000 [ 640.353100] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 640.354384] CR2: 0000000000000028 CR3: 000000003ef76000 CR4: 00000000000006f0 [ 640.355852] Stack: [ 640.356635] ffff88001db22d50 ffff88003e8eb300 ffff88001db301b0 ffff88003eed2000 [ 640.358707] ffff88001db22970 ffff88003ea03e50 ffffffffa004dd5d ffff88003ea03db8 [ 640.360831] 0000000000000100 000041ff01ed2000 0000000100000002 0000000000003ea9 [ 640.362941] Call Trace: [ 640.363800] [] btrfs_new_inode+0x433/0x531 [btrfs] [ 640.365195] [] btrfs_mkdir+0xb0/0x1c6 [btrfs] [ 640.366577] [] vfs_mkdir+0x78/0xa6 [ 640.367763] [] SyS_mkdirat+0x7a/0xb1 [ 640.369011] [] ? path_put+0x1e/0x21 [ 640.370206] [] SyS_mkdir+0x19/0x1b [ 640.371420] [] entry_SYSCALL_64_fastpath+0x12/0x71 [ 640.372810] Code: 00 00 00 00 00 00 48 89 47 40 5d c3 66 66 66 66 90 48 8b 86 90 02 00 00 55 48 89 e5 41 56 49 89 fe 41 55 41 54 41 52 53 48 89 f3 <48> 8b 78 28 e8 97 7c 11 e1 48 8d bb 2c 04 00 00 49 89 c5 49 89 [ 640.378682] RIP [] btrfs_update_root_times+0x1f/0x6b [btrfs] [ 640.380736] RSP [ 640.381736] CR2: 0000000000000028 [ 640.383211] ---[ end trace ed72d9677669a6b4 ]--- [ 640.384544] Kernel panic - not syncing: Fatal exception To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Ying Huang