syzbot


WARNING: kmalloc bug in hash_netport_create

Status: closed as dup on 2021/09/15 05:14
Reported-by: syzbot+3f5904753c2388727c6c@syzkaller.appspotmail.com
First crash: 387d, last: 363d

Cause bisection: introduced by (bisect log) :
commit 7661809d493b426e979f39ab512e3adf41fbcc69
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed Jul 14 16:45:49 2021 +0000

  mm: don't allow oversized kvmalloc() calls

Crash: WARNING: kmalloc bug in hash_netport_create (log)
Repro: C syz .config
Duplicate of (1):
Title Repro Cause bisect Fix bisect Count Last Reported
WARNING: kmalloc bug in hash_net_create C done 283 360d 387d

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8430 at mm/util.c:597 kvmalloc_node+0x111/0x120 mm/util.c:597
Modules linked in:
CPU: 1 PID: 8430 Comm: syz-executor891 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kvmalloc_node+0x111/0x120 mm/util.c:597
Code: 01 00 00 00 4c 89 e7 e8 ed 11 0d 00 49 89 c5 e9 69 ff ff ff e8 90 55 d1 ff 41 89 ed 41 81 cd 00 20 01 00 eb 95 e8 7f 55 d1 ff <0f> 0b e9 4c ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 e8 66
RSP: 0018:ffffc900010a7078 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc900010a7190 RCX: 0000000000000000
RDX: ffff88801d93e300 RSI: ffffffff81a3f651 RDI: 0000000000000003
RBP: 0000000000400dc0 R08: 000000007fffffff R09: 000000000000001f
R10: ffffffff81a3f60e R11: 000000000000001f R12: 0000000400000018
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88803040e000
FS:  0000000002161300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000003ea95000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hash_netport_create+0x3dd/0x1220 net/netfilter/ipset/ip_set_hash_gen.h:1524
 ip_set_create+0x782/0x15a0 net/netfilter/ipset/ip_set_core.c:1100
 nfnetlink_rcv_msg+0xbc9/0x13f0 net/netfilter/nfnetlink.c:296
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
 nfnetlink_rcv+0x1ac/0x420 net/netfilter/nfnetlink.c:654
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 sock_no_sendpage+0xf3/0x130 net/core/sock.c:2980
 kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3504
 kernel_sendpage net/socket.c:3501 [inline]
 sock_sendpage+0xe5/0x140 net/socket.c:1003
 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x43e/0x8a0 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xd4/0x140 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 do_splice+0xb7e/0x1960 fs/splice.c:1079
 __do_splice+0x134/0x250 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice fs/splice.c:1332 [inline]
 __x64_sys_splice+0x198/0x250 fs/splice.c:1332
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43efb9
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd3f03c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043efb9
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000402fa0 R08: 0000000100000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403030
R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2021/09/03 19:57 upstream a9c9a6f741cd f62a5829 .config log report syz C WARNING: kmalloc bug in hash_netport_create
ci-upstream-kasan-gce-root 2021/09/27 03:47 upstream 996148ee05d0 78494d16 .config log report info WARNING: kmalloc bug in hash_netport_create
ci-upstream-kasan-gce-selinux-root 2021/09/03 19:32 upstream a9c9a6f741cd f62a5829 .config log report info WARNING: kmalloc bug in hash_netport_create
* Struck through repros no longer work on HEAD.