On Wed, Jul 4, 2018 at 5:11 PM, syzbot <[email protected]> wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 2bdea157b999 Merge branch 'sctp-fully-support-for-dscp-and.. > git tree: bpf-next > console output: https://syzkaller.appspot.com/x/log.txt?x=153954c2400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f62553dc846b0692 > dashboard link: https://syzkaller.appspot.com/bug?extid=3d9a14b389b1d7e54d6d > compiler: gcc (GCC) 8.0.1 20180413 (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: [email protected]
#syz dup: KASAN: stack-out-of-bounds Read in timerqueue_add > ================================================================== > PANIC: double fault, error_code: 0x0 > BUG: KASAN: stack-out-of-bounds in __read_once_size > include/linux/compiler.h:188 [inline] > BUG: KASAN: stack-out-of-bounds in calc_group_shares > kernel/sched/fair.c:2931 [inline] > BUG: KASAN: stack-out-of-bounds in update_cfs_group+0x4b1/0x590 > kernel/sched/fair.c:3028 > CPU: 1 PID: 15263 Comm: syz-executor7 Not tainted 4.18.0-rc3+ #45 > Read of size 8 at addr ffff8801aca4b500 by task syz-executor5/15250 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:__lock_acquire+0x2e/0x5020 kernel/locking/lockdep.c:3294 > > Code: 41 > CPU: 0 PID: 15250 Comm: syz-executor5 Not tainted 4.18.0-rc3+ #45 > 57 41 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > 89 cf > Call Trace: > 41 56 > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 > 41 55 > 49 89 > fd 41 > 54 45 > 89 > print_address_description+0x6c/0x20b mm/kasan/report.c:256 > cc 53 > 65 4c > kasan_report_error mm/kasan/report.c:354 [inline] > kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 > 8b 34 > __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 > 25 40 > __read_once_size include/linux/compiler.h:188 [inline] > calc_group_shares kernel/sched/fair.c:2931 [inline] > update_cfs_group+0x4b1/0x590 kernel/sched/fair.c:3028 > ee 01 > 00 48 > 83 e4 > f0 48 > dequeue_entity+0x400/0x15e0 kernel/sched/fair.c:4322 > 81 > ec 60 > 03 00 > 00 48 > 8b 45 > 10 <89> > 94 24 > 80 > dequeue_task_fair+0xf2/0x9e0 kernel/sched/fair.c:5455 > 00 00 > 00 48 > ba 00 > 00 00 > 00 00 > fc ff > df 48 > dequeue_task kernel/sched/core.c:762 [inline] > deactivate_task+0xf3/0x330 kernel/sched/core.c:778 > 89 > __schedule+0x9c9/0x1ed0 kernel/sched/core.c:3454 > 84 24 > 98 > RSP: 0018:ffff8801ac5ffe80 EFLAGS: 00010082 > RAX: 0000000000000000 RBX: 1ffff100358c004c RCX: 0000000000000002 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 > RBP: ffff8801ac600208 R08: 0000000000000000 R09: 0000000000000000 > R10: ffff8801acc771b8 R11: ffff8801daf236b3 R12: 0000000000000000 > R13: ffffffff88f92620 R14: ffff8801aee52140 R15: 0000000000000002 > FS: 00007fe265cc0700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: ffff8801ac5ffe78 CR3: 00000001aaa5e000 CR4: 00000000001406e0 > DR0: 00000000200001c0 DR1: 0000000020000000 DR2: 0000000000000000 > schedule+0xfb/0x450 kernel/sched/core.c:3548 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 > Call Trace: > > > --- > 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 [email protected]. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with > syzbot. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/000000000000c19fad05702dd6a8%40google.com. > For more options, visit https://groups.google.com/d/optout.
