syzbot


WARNING in handle_policy_update

Status: fixed on 2025/05/06 15:33
Subsystems: lsm
[Documentation on labels]
Reported-by: syzbot+4eb7a741b3216020043a@syzkaller.appspotmail.com
Fix commit: f09ff307c729 safesetid: check size of policy writes
First crash: 151d, last: 126d
Discussions (9)
Title Replies (including bot) Last reply
[PATCH v2] lsm: check size of writes 13 (13) 2025/01/27 16:05
[PATCH AUTOSEL 5.10 3/3] safesetid: check size of policy writes 1 (1) 2025/01/26 14:57
[PATCH AUTOSEL 5.15 3/3] safesetid: check size of policy writes 1 (1) 2025/01/26 14:57
[PATCH AUTOSEL 6.1 9/9] safesetid: check size of policy writes 1 (1) 2025/01/26 14:56
[PATCH AUTOSEL 6.6 17/17] safesetid: check size of policy writes 1 (1) 2025/01/26 14:56
[PATCH AUTOSEL 6.12 28/31] safesetid: check size of policy writes 1 (1) 2025/01/26 14:54
[PATCH AUTOSEL 6.13 31/34] safesetid: check size of policy writes 1 (1) 2025/01/26 14:53
[PATCH] lsm: check size of writes 3 (3) 2024/12/16 22:59
[syzbot] [lsm?] WARNING in handle_policy_update 0 (1) 2024/12/15 21:59

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5827 at mm/page_alloc.c:4727 __alloc_pages_noprof+0xeff/0x25b0 mm/page_alloc.c:4727
Modules linked in:
CPU: 0 UID: 0 PID: 5827 Comm: syz-executor752 Not tainted 6.13.0-rc2-syzkaller-00159-gf932fb9b4074 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:__alloc_pages_noprof+0xeff/0x25b0 mm/page_alloc.c:4727
Code: 24 2c 00 00 00 00 89 cd 0f 84 8b f9 ff ff 8b 34 24 48 89 da 8b 7c 24 08 e8 0e b3 fe ff e9 69 f9 ff ff c6 05 e1 44 16 0e 01 90 <0f> 0b 90 31 db e9 9f f3 ff ff 89 14 24 e8 9f a2 0c 00 8b 14 24 e9
RSP: 0018:ffffc900015978e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000040cc0
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000100
R10: 0000000000000100 R11: ffffffff81fb9344 R12: 0000000000000013
R13: 0000000000040cc0 R14: 1ffff920002b2f31 R15: 00000000ffffffff
FS:  000055556162e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000130 CR3: 0000000028cc2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 ___kmalloc_large_node+0x84/0x1b0 mm/slub.c:4228
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:4255
 __do_kmalloc_node mm/slub.c:4271 [inline]
 __kmalloc_node_track_caller_noprof.cold+0x5/0x5f mm/slub.c:4302
 memdup_user_nul+0x2b/0x110 mm/util.c:305
 handle_policy_update+0x188/0x11e0 security/safesetid/securityfs.c:153
 safesetid_gid_file_write+0x87/0xc0 security/safesetid/securityfs.c:260
 vfs_write+0x24c/0x1150 fs/read_write.c:677
 ksys_write+0x12b/0x250 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8b2d0d02e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd58b75818 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffd58b759f8 RCX: 00007f8b2d0d02e9
RDX: 00000000fffffdef RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f8b2d143610 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd58b759e8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (61):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/13 12:10 upstream f932fb9b4074 b1b5e51a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/11 22:33 upstream f92f4749861b 6f1b0fa8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/05 23:34 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/05 22:21 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/05 09:16 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/05 07:30 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/04 18:43 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/04 15:55 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/04 12:45 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/03 13:45 upstream 0bc21e701a6f 96d578a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/02 08:56 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/01 15:24 upstream ccb98ccef0e5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/01 13:58 upstream ccb98ccef0e5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2025/01/01 09:11 upstream ccb98ccef0e5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/31 16:19 upstream ccb98ccef0e5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/31 08:00 upstream ccb98ccef0e5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/30 16:53 upstream fc033cf25e61 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/30 00:39 upstream 4099a71718b0 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/29 14:30 upstream 059dd502b263 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/29 13:11 upstream 059dd502b263 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/29 08:33 upstream 059dd502b263 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/28 22:13 upstream fd0584d220fe d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/28 18:44 upstream fd0584d220fe d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/28 16:16 upstream fd0584d220fe d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/28 13:18 upstream fd0584d220fe d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/27 22:29 upstream 8379578b11d5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/26 18:25 upstream 9b2ffa6148b1 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/26 17:56 upstream 9b2ffa6148b1 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/26 08:02 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/26 05:57 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/26 01:28 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/25 14:10 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/25 14:06 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/25 13:47 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/25 11:20 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/25 10:55 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/25 01:53 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/24 23:37 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/24 13:53 upstream f07044dd0df0 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/24 12:55 upstream f07044dd0df0 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/24 09:36 upstream f07044dd0df0 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/22 20:37 upstream bcde95ce32b6 b4fbdbd4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/22 13:55 upstream 48f506ad0b68 b4fbdbd4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/21 07:02 upstream e9b8ffafd20a d7f584ee .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/19 21:12 upstream eabcdba3ad40 1d58202c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/19 20:01 upstream eabcdba3ad40 1d58202c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/18 19:54 upstream aef25be35d23 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/16 06:38 upstream dccbe2047a5b 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/15 19:55 upstream 2d8308bf5b67 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/15 12:33 upstream 2d8308bf5b67 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/14 06:01 upstream 243f750a2df0 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/12 18:52 upstream 231825b2e1ff 035bb8e0 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/12 15:18 upstream 231825b2e1ff 035bb8e0 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/12 13:06 upstream 231825b2e1ff 035bb8e0 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/12 07:39 upstream f92f4749861b 6f1b0fa8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/12 00:53 upstream f92f4749861b 6f1b0fa8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
2024/12/11 21:54 upstream f92f4749861b 6f1b0fa8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in handle_policy_update
* Struck through repros no longer work on HEAD.