Messages in this thread | | | Date | Mon, 04 May 2020 03:54:18 -0700 | Subject | BUG: unable to handle kernel paging request in syscall_return_slowpath | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: f66ed1eb Merge tag 'iomap-5.7-fixes-1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=140f6e60100000 kernel config: https://syzkaller.appspot.com/x/.config?x=1ac152749c11ca54 dashboard link: https://syzkaller.appspot.com/bug?extid=3231e7d48f1538976553 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1415e23fe00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=146bbc3fe00000
Bisection is inconclusive: the bug happens on the oldest tested release.
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12955ee4100000 final crash: https://syzkaller.appspot.com/x/report.txt?x=11955ee4100000 console output: https://syzkaller.appspot.com/x/log.txt?x=16955ee4100000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3231e7d48f1538976553@syzkaller.appspotmail.com
BUG: unable to handle page fault for address: fffffffff8778570 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 927c067 P4D 927c067 PUD 927e067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7070 Comm: syz-executor231 Not tainted 5.7.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0xfffffffff8778570 Code: Bad RIP value. RSP: 0018:ffffc90001627f00 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000004000 RCX: ffff888092d64280 RDX: ffff888092d64280 RSI: 0000000000000200 RDI: 0000000000000000 RBP: 0000000000000200 R08: ffffffff8100848d R09: fffffbfff16e6e11 R10: fffffbfff16e6e11 R11: 0000000000000000 R12: 1ffff110125ac850 R13: dffffc0000000000 R14: ffff888092d64280 R15: ffff888092d64280 FS: 0000000001be0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffff8778546 CR3: 00000000a82d6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: syscall_return_slowpath+0x9b/0x420 arch/x86/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Modules linked in: CR2: fffffffff8778570 ---[ end trace 8e914c2fec746223 ]--- RIP: 0010:0xfffffffff8778570 Code: Bad RIP value. RSP: 0018:ffffc90001627f00 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000004000 RCX: ffff888092d64280 RDX: ffff888092d64280 RSI: 0000000000000200 RDI: 0000000000000000 RBP: 0000000000000200 R08: ffffffff8100848d R09: fffffbfff16e6e11 R10: fffffbfff16e6e11 R11: 0000000000000000 R12: 1ffff110125ac850 R13: dffffc0000000000 R14: ffff888092d64280 R15: ffff888092d64280 FS: 0000000001be0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffff8778546 CR3: 00000000a82d6000 CR4: 00000000001406e0 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@googlegroups.com.
syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
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