syzbot


KMSAN: uninit-value in translate_table (2)

Status: auto-closed as invalid on 2021/11/13 14:40
Reported-by: syzbot+761644ed2ba863e99b41@syzkaller.appspotmail.com
First crash: 548d, last: 502d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in translate_table 1 826d 822d 0/24 auto-closed as invalid on 2020/12/24 01:52

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in check_entry_size_and_hooks net/ipv4/netfilter/ip_tables.c:599 [inline]
BUG: KMSAN: uninit-value in translate_table+0xdbf/0x3c40 net/ipv4/netfilter/ip_tables.c:685
CPU: 0 PID: 24174 Comm: syz-executor.5 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197
 check_entry_size_and_hooks net/ipv4/netfilter/ip_tables.c:599 [inline]
 translate_table+0xdbf/0x3c40 net/ipv4/netfilter/ip_tables.c:685
 translate_compat_table net/ipv4/netfilter/ip_tables.c:1463 [inline]
 compat_do_replace net/ipv4/netfilter/ip_tables.c:1517 [inline]
 do_ipt_set_ctl+0x446a/0x56a0 net/ipv4/netfilter/ip_tables.c:1624
 nf_setsockopt+0x59e/0x600 net/netfilter/nf_sockopt.c:101
 ip_setsockopt+0x651f/0x8ab0 net/ipv4/ip_sockglue.c:1435
 raw_setsockopt+0x3f6/0x470 net/ipv4/raw.c:857
 sock_common_setsockopt+0x16c/0x1b0 net/core/sock.c:3263
 __sys_setsockopt+0x94c/0xd80 net/socket.c:2117
 __do_sys_setsockopt net/socket.c:2128 [inline]
 __se_sys_setsockopt+0xdd/0x100 net/socket.c:2125
 __ia32_sys_setsockopt+0x62/0x80 net/socket.c:2125
 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline]
 __do_fast_syscall_32+0x127/0x180 arch/x86/entry/common.c:142
 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:168
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:211
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7fcd549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f55c75fc EFLAGS: 00000296 ORIG_RAX: 000000000000016e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000040 RSI: 0000000020000200 RDI: 000000000000028c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:120 [inline]
 kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:103
 kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76
 slab_alloc_node mm/slub.c:2922 [inline]
 __kmalloc_node+0xa3c/0x1440 mm/slub.c:4116
 kmalloc_node include/linux/slab.h:577 [inline]
 kvmalloc_node+0x201/0x3d0 mm/util.c:587
 kvmalloc include/linux/mm.h:785 [inline]
 xt_alloc_table_info+0xce/0x1c0 net/netfilter/x_tables.c:1178
 translate_compat_table net/ipv4/netfilter/ip_tables.c:1427 [inline]
 compat_do_replace net/ipv4/netfilter/ip_tables.c:1517 [inline]
 do_ipt_set_ctl+0x2978/0x56a0 net/ipv4/netfilter/ip_tables.c:1624
 nf_setsockopt+0x59e/0x600 net/netfilter/nf_sockopt.c:101
 ip_setsockopt+0x651f/0x8ab0 net/ipv4/ip_sockglue.c:1435
 raw_setsockopt+0x3f6/0x470 net/ipv4/raw.c:857
 sock_common_setsockopt+0x16c/0x1b0 net/core/sock.c:3263
 __sys_setsockopt+0x94c/0xd80 net/socket.c:2117
 __do_sys_setsockopt net/socket.c:2128 [inline]
 __se_sys_setsockopt+0xdd/0x100 net/socket.c:2125
 __ia32_sys_setsockopt+0x62/0x80 net/socket.c:2125
 do_syscall_32_irqs_on arch/x86/entry/common.c:79 [inline]
 __do_fast_syscall_32+0x127/0x180 arch/x86/entry/common.c:142
 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:168
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:211
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
=====================================================

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kmsan-gce-386 2021/07/16 14:39 https://github.com/google/kmsan.git master 57b5797c8013 f115ae98 .config log report info KMSAN: uninit-value in translate_table
ci-upstream-kmsan-gce-386 2021/07/16 14:31 https://github.com/google/kmsan.git master 57b5797c8013 f115ae98 .config log report info KMSAN: uninit-value in translate_table
ci-upstream-kmsan-gce-386 2021/07/09 21:22 https://github.com/google/kmsan.git master 57b5797c8013 281e815f .config log report info KMSAN: uninit-value in translate_table
ci-upstream-kmsan-gce-386 2021/05/31 05:48 https://github.com/google/kmsan.git master 6099c9da2f7d 325a8dab .config log report info KMSAN: uninit-value in translate_table
* Struck through repros no longer work on HEAD.