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general protection fault in __radix_tree_delete

Status: fixed on 2018/06/07 13:52
Subsystems: kvm
[Documentation on labels]
Reported-by: syzbot+549decbd1891d501b6d5@syzkaller.appspotmail.com
Fix commit: 7a4deea1aa8b idr: fix invalid ptr dereference on item delete
First crash: 2398d, last: 2371d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
general protection fault in __radix_tree_delete 2 (3) 2018/05/26 16:44

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4554 Comm: syz-executor145 Not tainted 4.17.0-rc6+ #62
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline]
RIP: 0010:__radix_tree_delete+0x74/0x230 lib/radix-tree.c:1987
RSP: 0018:ffff8801ae2cf108 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 1ffff10035c59e3e
RDX: 0000000000000000 RSI: ffffffff87696bdd RDI: ffff8801a0469e68
RBP: ffff8801ae2cf1a8 R08: ffff8801ad108680 R09: ffffed003408d3b1
R10: ffff8801ae2cf2b8 R11: ffff8801a0469d8f R12: 0000000000000000
R13: ffff8801a0469e68 R14: 0000000000000000 R15: ffff8801ae2cf230
FS:  0000000000d0e880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000180 CR3: 00000001ad029000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 radix_tree_delete_item+0x148/0x2d0 lib/radix-tree.c:2048
 idr_remove+0x46/0x60 lib/idr.c:157
 kvm_hv_eventfd_deassign arch/x86/kvm/hyperv.c:1435 [inline]
 kvm_vm_ioctl_hv_eventfd+0x1df/0x24b arch/x86/kvm/hyperv.c:1453
 kvm_arch_vm_ioctl+0x155e/0x2690 arch/x86/kvm/x86.c:4566
 kvm_vm_ioctl+0x246/0x1d90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3100
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x43fda9
RSP: 002b:00007ffc4ee33e78 EFLAGS: 00000217 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 6d766b2f7665642f RCX: 000000000043fda9
RDX: 0000000020000140 RSI: 000000004018aebd RDI: 00000000000003fd
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000217 R12: 00000000004016d0
R13: 0000000000401760 R14: 0000000000000000 R15: 0000000000000000
Code: 48 9a 88 48 c7 45 88 70 6b 69 87 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 43 c4 0f fa 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 0f 85 97 01 00 00 48 8d 55 d8 4c 8d 7a c0 49 8b 1e 
RIP: __read_once_size include/linux/compiler.h:188 [inline] RSP: ffff8801ae2cf108
RIP: __radix_tree_delete+0x74/0x230 lib/radix-tree.c:1987 RSP: ffff8801ae2cf108
---[ end trace 9fd9d1d02d80eee6 ]---

Crashes (38):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/05/21 19:56 upstream 6741c4bb389d f48c20b8 .config console log report syz C ci-upstream-kasan-gce-root
2018/05/21 19:35 upstream 6741c4bb389d f48c20b8 .config console log report syz C ci-upstream-kasan-gce
2018/05/20 20:31 upstream 203ec2fed17a f48c20b8 .config console log report syz C ci-upstream-kasan-gce
2018/05/20 19:53 upstream 203ec2fed17a f48c20b8 .config console log report syz C ci-upstream-kasan-gce-root
2018/05/17 19:20 upstream 305bb5521282 738d58ad .config console log report syz C ci-upstream-kasan-gce-root
2018/05/17 19:02 upstream 305bb5521282 738d58ad .config console log report syz C ci-upstream-kasan-gce
2018/04/29 08:53 upstream cdface520934 d5a5d045 .config console log report syz C ci-upstream-kasan-gce
2018/04/29 08:52 upstream cdface520934 d5a5d045 .config console log report syz C ci-upstream-kasan-gce-root
2018/04/29 03:28 upstream a97d8efd9d35 d5a5d045 .config console log report syz ci-upstream-kasan-gce
2018/05/21 21:02 upstream 6741c4bb389d f48c20b8 .config console log report syz ci-upstream-kasan-gce-386
2018/05/20 20:50 upstream 203ec2fed17a f48c20b8 .config console log report syz ci-upstream-kasan-gce-386
2018/04/29 08:30 upstream cdface520934 d5a5d045 .config console log report syz ci-upstream-kasan-gce-386
2018/04/29 03:13 upstream a97d8efd9d35 d5a5d045 .config console log report syz ci-upstream-kasan-gce-386
2018/05/26 01:01 upstream 62d18ecfa641 f48c20b8 .config console log report ci-upstream-kasan-gce
2018/05/22 20:47 upstream a048a07d7f45 f48c20b8 .config console log report ci-upstream-kasan-gce
2018/05/21 16:51 upstream 771c577c23ba f48c20b8 .config console log report ci-upstream-kasan-gce
2018/05/18 17:51 upstream 3acf4e395260 849705db .config console log report ci-upstream-kasan-gce
2018/05/17 08:04 upstream e6506eb24187 a367c1d7 .config console log report ci-upstream-kasan-gce
2018/05/17 02:41 upstream e6506eb24187 a367c1d7 .config console log report ci-upstream-kasan-gce
2018/05/16 17:12 upstream 21b9f1c7e319 75b2448a .config console log report ci-upstream-kasan-gce
2018/05/16 15:26 upstream 21b9f1c7e319 75b2448a .config console log report ci-upstream-kasan-gce
2018/05/11 05:53 upstream 008464a9360e 12c7428a .config console log report ci-upstream-kasan-gce
2018/05/09 23:01 upstream 008464a9360e 12c7428a .config console log report ci-upstream-kasan-gce
2018/05/09 21:09 upstream 036db8bd9637 12c7428a .config console log report ci-upstream-kasan-gce-root
2018/05/04 15:37 upstream 150426981426 9ce14f4b .config console log report ci-upstream-kasan-gce-root
2018/05/03 17:41 upstream f4ef6a438cee 9ce14f4b .config console log report ci-upstream-kasan-gce
2018/05/02 12:54 upstream f2125992e7cb d5b114b4 .config console log report ci-upstream-kasan-gce
2018/05/01 14:44 upstream fff75eb2a08c d5b114b4 .config console log report ci-upstream-kasan-gce-root
2018/04/30 09:59 upstream 6da6c0db5316 06db3cec .config console log report ci-upstream-kasan-gce
2018/04/30 09:09 upstream 6da6c0db5316 06db3cec .config console log report ci-upstream-kasan-gce-root
2018/04/29 23:59 upstream c61a56ababa4 bb79c6ab .config console log report ci-upstream-kasan-gce
2018/04/29 16:49 upstream cdface520934 d5a5d045 .config console log report ci-upstream-kasan-gce-root
2018/05/20 03:04 upstream 0b449a441dac f48c20b8 .config console log report ci-upstream-kasan-gce-386
2018/05/17 02:41 upstream e6506eb24187 a367c1d7 .config console log report ci-upstream-kasan-gce-386
2018/05/13 23:25 upstream 66e1c94db3cd 481f030c .config console log report ci-upstream-kasan-gce-386
2018/05/08 23:53 upstream 036db8bd9637 b88872ba .config console log report ci-upstream-kasan-gce-386
2018/04/29 07:34 upstream cdface520934 d5a5d045 .config console log report ci-upstream-kasan-gce-386
2018/04/29 02:49 upstream a97d8efd9d35 d5a5d045 .config console log report ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.