Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 236b7bc44ae0fdecc8e80c5aba0655ca14fdfb23 ("[PATCH 4/4] drm/crtc: add drmm_crtc_alloc_with_planes()") url: https://github.com/0day-ci/linux/commits/Philipp-Zabel/drm-add-drmm_encoder_... base: git://anongit.freedesktop.org/drm-intel for-linux-next
in testcase: trinity with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester. test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------------------------------------------------------+------------+------------+ | | d809a51da3 | 236b7bc44a | +---------------------------------------------------------------------------------------------+------------+------------+ | boot_successes | 16 | 0 | | boot_failures | 0 | 4 | | BUG:stack_guard_page_was_hit_at(____ptrval____)(stack_is(____ptrval____)..(____ptrval____)) | 0 | 4 | | RIP:drm_crtc_init_with_planes[drm] | 0 | 4 | | Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0 | 4 | +---------------------------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag Reported-by: kernel test robot lkp@intel.com
[ 12.795894] BUG: stack guard page was hit at (____ptrval____) (stack is (____ptrval____)..(____ptrval____)) [ 12.795895] kernel stack overflow (double-fault): 0000 [#1] SMP PTI [ 12.795896] CPU: 0 PID: 193 Comm: systemd-udevd Not tainted 5.8.0-01890-g236b7bc44ae0fd #1 [ 12.795897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 12.795898] RIP: 0010:drm_crtc_init_with_planes+0x5/0x80 [drm] [ 12.795899] Code: 0f eb 16 48 8b 50 10 48 8d 42 f0 48 39 d7 74 09 39 b0 90 00 00 00 75 eb c3 31 c0 c3 66 0f 1f 84 00 00 00 00 00 66 66 66 66 90 <55> 48 89 e5 41 52 4c 8d 55 10 48 83 ec 50 65 48 8b 04 25 28 00 00 [ 12.795900] RSP: 0018:ffffac1040344000 EFLAGS: 00010246 [ 12.795902] RAX: ffffac1040344010 RBX: ffff9b400fa8b078 RCX: 0000000000000000 [ 12.795902] RDX: ffff9b400fa8b490 RSI: ffff9b400fa8b078 RDI: ffff9b4010c5c000 [ 12.795903] RBP: ffffac1040344068 R08: ffffffffc04d3340 R09: 0000000000000000 [ 12.795904] R10: ffffac1040344078 R11: 0000000000000000 R12: ffff9b4010c5c000 [ 12.795905] R13: ffff9b400fa8b490 R14: 000000000000000a R15: ffffffffc0621300 [ 12.795905] FS: 00007faf7e56dd40(0000) GS:ffff9b403fc00000(0000) knlGS:0000000000000000 [ 12.795906] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 12.795907] CR2: ffffac1040343ff8 CR3: 0000000168096000 CR4: 00000000000406f0 [ 12.795907] Call Trace: [ 12.795908] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795909] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795910] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795911] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795912] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795913] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795914] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795915] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795916] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795917] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795918] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795919] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795920] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795921] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795922] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795923] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795924] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795925] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795926] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795927] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795928] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795929] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795930] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795931] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795932] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795933] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795934] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795935] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795936] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795937] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795938] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795939] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795940] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795941] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795942] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795943] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795944] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795945] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795946] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795947] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795948] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795949] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795950] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795951] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795952] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795953] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795954] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795955] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795956] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795957] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795958] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795959] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795960] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795961] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795962] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795963] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795964] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795965] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795966] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795967] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795968] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795969] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795970] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795971] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795972] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795973] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795974] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795975] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795976] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795977] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795978] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795979] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795980] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795981] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795982] ? update_group_capacity+0x25/0x1c0 [ 12.795982] ? cpumask_next_and+0x1a/0x20 [ 12.795983] ? update_sd_lb_stats+0x121/0x860 [ 12.795984] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795985] ? update_load_avg+0x78/0x660 [ 12.795986] ? account_entity_enqueue+0x9c/0xe0 [ 12.795986] ? enqueue_entity+0x218/0x3a0 [ 12.795987] drm_crtc_init_with_planes+0x63/0x80 [drm] [ 12.795987] ? enqueue_task_fair+0x8e/0x6a0 [ 12.795988] ? check_preempt_wakeup+0x17f/0x240 [ 12.795988] drm_crtc_init_with_planes+0x63/0x80 [drm]
To reproduce:
# build kernel cd linux cp config-5.8.0-01890-g236b7bc44ae0fd .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks, lkp