On Sat, Nov 30, 2019 at 8:57 AM syzbot <syzbot+6be2cbddaad2e32b47a0@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 419593da Add linux-next specific files for 20191129 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=10cecb36e00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=7c04b0959e75c206 > dashboard link: https://syzkaller.appspot.com/bug?extid=6be2cbddaad2e32b47a0 > 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+6be2cbddaad2e32b47a0@xxxxxxxxxxxxxxxxxxxxxxxxx +Daniel, kasan-dev This is presumably from the new CONFIG_KASAN_VMALLOC > BUG: unable to handle page fault for address: fffff52002e00000 > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > PGD 21ffee067 P4D 21ffee067 PUD aa11c067 PMD 0 > Oops: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 2938 Comm: kworker/0:2 Not tainted > 5.4.0-next-20191129-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Workqueue: xfs-buf/loop3 xfs_buf_ioend_work > RIP: 0010:xfs_sb_read_verify+0xf0/0x540 fs/xfs/libxfs/xfs_sb.c:691 > Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 18 04 00 00 4d 8b ac 24 30 01 > 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 84 > c0 74 08 3c 03 0f 8e a7 03 00 00 41 8b 75 00 bf 58 > RSP: 0018:ffffc90007e5faf0 EFLAGS: 00010a06 > RAX: dffffc0000000000 RBX: 1ffff92000fcbf61 RCX: ffffffff82acb516 > RDX: 1ffff92002e00000 RSI: ffffffff82a97e3b RDI: ffff888091bada60 > RBP: ffffc90007e5fcd0 R08: ffff88809f3c2040 R09: ffffed1015cc7045 > R10: ffffed1015cc7044 R11: ffff8880ae638223 R12: ffff888091bad940 > R13: ffffc90017000000 R14: ffffc90007e5fca8 R15: ffff88809feb8000 > FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: fffff52002e00000 CR3: 0000000069ceb000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > xfs_buf_ioend+0x3f9/0xde0 fs/xfs/xfs_buf.c:1162 > xfs_buf_ioend_work+0x19/0x20 fs/xfs/xfs_buf.c:1183 > process_one_work+0x9af/0x1740 kernel/workqueue.c:2264 > worker_thread+0x98/0xe40 kernel/workqueue.c:2410 > kthread+0x361/0x430 kernel/kthread.c:255 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 > Modules linked in: > CR2: fffff52002e00000 > ---[ end trace aef83d995322cc4a ]--- > RIP: 0010:xfs_sb_read_verify+0xf0/0x540 fs/xfs/libxfs/xfs_sb.c:691 > Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 18 04 00 00 4d 8b ac 24 30 01 > 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 84 > c0 74 08 3c 03 0f 8e a7 03 00 00 41 8b 75 00 bf 58 > RSP: 0018:ffffc90007e5faf0 EFLAGS: 00010a06 > RAX: dffffc0000000000 RBX: 1ffff92000fcbf61 RCX: ffffffff82acb516 > RDX: 1ffff92002e00000 RSI: ffffffff82a97e3b RDI: ffff888091bada60 > RBP: ffffc90007e5fcd0 R08: ffff88809f3c2040 R09: ffffed1015cc7045 > R10: ffffed1015cc7044 R11: ffff8880ae638223 R12: ffff888091bad940 > R13: ffffc90017000000 R14: ffffc90007e5fca8 R15: ffff88809feb8000 > FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: fffff52002e00000 CR3: 0000000069ceb000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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. > > -- > 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 syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000005f386305988bb15f%40google.com.
