Messages in this thread | ![/](/images/icornerl.gif) | | Date | Fri, 02 Nov 2018 08:37:03 -0700 | Subject | WARNING in kmem_cache_create_usercopy | From | syzbot <> |
| |
Hello,
syzbot found the following crash on:
HEAD commit: 4794a36bf08d Add linux-next specific files for 20180928 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=124f814e400000 kernel config: https://syzkaller.appspot.com/x/.config?x=b0ba9bb377f8ae91 dashboard link: https://syzkaller.appspot.com/bug?extid=0c1d61e4db7db94102ca compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1511532a400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1701f831400000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+0c1d61e4db7db94102ca@syzkaller.appspotmail.com
WARNING: CPU: 0 PID: 6065 at mm/slab_common.c:473 kmem_cache_create_usercopy+0xad/0x240 mm/slab_common.c:473 Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 6065 Comm: syz-executor140 Not tainted 4.19.0-rc5-next-20180928+ #84 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c4 lib/dump_stack.c:113 panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:kmem_cache_create_usercopy+0xad/0x240 mm/slab_common.c:473 Code: 44 89 f0 25 00 60 de 04 45 85 ed 89 45 cc 75 0b 8b 45 d0 85 c0 0f 85 8e 01 00 00 44 39 eb 72 0a 89 d8 44 29 e8 3b 45 d0 73 7e <0f> 0b c7 45 d0 00 00 00 00 4c 8b 45 10 44 89 fa 89 de 4c 89 e7 8b RSP: 0018:ffff8801bc23f5d0 EFLAGS: 00010213 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffffffff88b04b20 RBP: ffff8801bc23f608 R08: fffffbfff1283a2d R09: fffffbfff1283a2c R10: ffff8801bc23f5c0 R11: ffffffff8941d167 R12: ffffffff88b04b20 R13: 00000000fffffffd R14: 0000000000000000 R15: 0000000000000000 p9_client_create+0xa58/0x1769 net/9p/client.c:1054 v9fs_session_init+0x217/0x1bb0 fs/9p/v9fs.c:421 v9fs_mount+0x7c/0x8f0 fs/9p/vfs_super.c:135 legacy_get_tree+0x131/0x460 fs/fs_context.c:718 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1795 do_new_mount fs/namespace.c:2648 [inline] do_mount+0x70c/0x1d90 fs/namespace.c:2974 ksys_mount+0x12d/0x140 fs/namespace.c:3190 __do_sys_mount fs/namespace.c:3204 [inline] __se_sys_mount fs/namespace.c:3201 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440189 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdd30ec3c8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440189 RDX: 00000000200008c0 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00000000006ca018 R08: 0000000020000a80 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401a10 R13: 0000000000401aa0 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..
--- 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#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
| ![\](/images/icornerr.gif) |