syzbot


UBSAN: shift-out-of-bounds in nci_activate_target

Status: upstream: reported on 2023/04/02 16:21
Labels: nfc (incorrect?)
Reported-by: syzbot+0839b78e119aae1fec78@syzkaller.appspotmail.com
First crash: 64d, last: 44d
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] net: nfc: nci: fix for UBSAN: shift-out-of-bounds in nci_activate_target 4 (4) 2023/04/19 08:28
[syzbot] [nfc?] UBSAN: shift-out-of-bounds in nci_activate_target 0 (1) 2023/04/02 16:21

Sample crash report:
================================================================================
UBSAN: shift-out-of-bounds in net/nfc/nci/core.c:912:45
shift exponent 1090519040 is too large for 32-bit type 'int'
CPU: 1 PID: 20568 Comm: syz-executor.3 Not tainted 6.3.0-rc7-syzkaller-00043-gaf67688dca57 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_shift_out_of_bounds+0x221/0x5a0 lib/ubsan.c:387
 nci_activate_target.cold+0x1a/0x1f net/nfc/nci/core.c:912
 nfc_activate_target+0x1f8/0x4c0 net/nfc/core.c:420
 nfc_genl_activate_target+0x1f3/0x290 net/nfc/netlink.c:900
 genl_family_rcv_msg_doit.isra.0+0x1e6/0x2d0 net/netlink/genetlink.c:968
 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline]
 genl_rcv_msg+0x4ff/0x7e0 net/netlink/genetlink.c:1065
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2577
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f310c68c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f310d3f7168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f310c7abf80 RCX: 00007f310c68c169
RDX: 0000000000000000 RSI: 0000000020000780 RDI: 0000000000000006
RBP: 00007f310c6e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe18cf17ef R14: 00007f310d3f7300 R15: 0000000000022000
 </TASK>
================================================================================

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/04/19 08:26 upstream af67688dca57 94b4184e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root UBSAN: shift-out-of-bounds in nci_activate_target
2023/03/29 16:17 linux-next 198925fae644 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root UBSAN: shift-out-of-bounds in nci_activate_target
* Struck through repros no longer work on HEAD.