Hello, syzbot found the following crash on: HEAD commit: e99332e7 gcc-10: mark more functions __init to avoid secti.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13de23a2100000 kernel config: https://syzkaller.appspot.com/x/.config?x=a45301b663dae85a dashboard link: https://syzkaller.appspot.com/bug?extid=839b7dbe276bd3648b70 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+839b7dbe276bd3648b70@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: vmalloc-out-of-bounds in memcpy include/linux/string.h:381 [inline] BUG: KASAN: vmalloc-out-of-bounds in drm_fb_helper_dirty_blit_real drivers/gpu/drm/drm_fb_helper.c:386 [inline] BUG: KASAN: vmalloc-out-of-bounds in drm_fb_helper_dirty_work+0x3f5/0x6b0 drivers/gpu/drm/drm_fb_helper.c:415 Write of size 32 at addr ffffc900290e5fe0 by task kworker/3:3/10902 CPU: 3 PID: 10902 Comm: kworker/3:3 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Workqueue: events drm_fb_helper_dirty_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x315 mm/kasan/report.c:382 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 check_memory_region_inline mm/kasan/generic.c:187 [inline] check_memory_region+0x141/0x190 mm/kasan/generic.c:193 memcpy+0x39/0x60 mm/kasan/common.c:107 memcpy include/linux/string.h:381 [inline] drm_fb_helper_dirty_blit_real drivers/gpu/drm/drm_fb_helper.c:386 [inline] drm_fb_helper_dirty_work+0x3f5/0x6b0 drivers/gpu/drm/drm_fb_helper.c:415 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Memory state around the buggy address: ffffc900290e5e80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc900290e5f00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 >ffffc900290e5f80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ^ ffffc900290e6000: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc900290e6080: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ================================================================== --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
