syzbot


WARNING in hashtab_init

Status: upstream: reported C repro on 2025/06/18 13:07
Subsystems: selinux
[Documentation on labels]
Reported-by: syzbot+bc2c99c2929c3d219fb3@syzkaller.appspotmail.com
Fix commit: selinux: add __GFP_NOWARN to hashtab_init() allocations
Patched on: [ci-upstream-linux-next-kasan-gce-root ci-upstream-rust-kasan-gce], missing on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 6d22h, last: 9m
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [selinux?] WARNING in hashtab_init 2 (4) 2025/06/18 15:07
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-12 WARNING in hashtab_init origin:upstream C 255 2h54m 6d06h 0/1 premoderation: reported C repro on 2025/06/19 03:47
Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/06/18 14:48 18m paul@paul-moore.com patch upstream OK log

Sample crash report:
WARNING: CPU: 3 PID: 5933 at mm/page_alloc.c:4935 __alloc_frozen_pages_noprof+0x30b/0x23f0 mm/page_alloc.c:4935
Modules linked in:
CPU: 3 UID: 0 PID: 5933 Comm: syz-executor114 Not tainted 6.16.0-rc2-syzkaller-00047-g52da431bf03b #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__alloc_frozen_pages_noprof+0x30b/0x23f0 mm/page_alloc.c:4935
Code: f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 83 fe 0a 0f 86 0a fe ff ff 80 3d 83 6e 7a 0e 00 75 0b c6 05 7a 6e 7a 0e 01 90 <0f> 0b 90 45 31 f6 eb 81 4d 85 f6 74 22 44 89 fa 89 ee 4c 89 f7 e8
RSP: 0018:ffffc9000333f438 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000015 RDI: 0000000000040dc0
RBP: 0000000200000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000040000000 R11: 0000000000000001 R12: 0000000000000015
R13: 1ffff92000667e9c R14: 0000000200000000 R15: 0000000000000015
FS:  000055555d875380(0000) GS:ffff8880d6a53000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000032669000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __alloc_pages_noprof+0xb/0x1b0 mm/page_alloc.c:4993
 __alloc_pages_node_noprof include/linux/gfp.h:284 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:311 [inline]
 ___kmalloc_large_node+0x84/0x1e0 mm/slub.c:4272
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:4300
 __do_kmalloc_node mm/slub.c:4316 [inline]
 __kmalloc_noprof.cold+0xc/0x61 mm/slub.c:4340
 kmalloc_noprof include/linux/slab.h:909 [inline]
 kmalloc_array_noprof include/linux/slab.h:948 [inline]
 hashtab_init+0x1b1/0x290 security/selinux/ss/hashtab.c:43
 common_read+0x1c2/0x3d0 security/selinux/ss/policydb.c:1172
 policydb_read+0x874/0x3220 security/selinux/ss/policydb.c:2578
 security_load_policy+0x15c/0x12c0 security/selinux/ss/services.c:2299
 sel_write_load+0x332/0x1bd0 security/selinux/selinuxfs.c:603
 vfs_write+0x2a0/0x1150 fs/read_write.c:684
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc8dc815d79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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:00007fff87e67758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000200000000300 RCX: 00007fc8dc815d79
RDX: 0000000000002000 RSI: 0000200000000000 RDI: 0000000000000003
RBP: 0000200000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000008f R11: 0000000000000246 R12: 00007fc8dc86419c
R13: 00007fc8dc85f082 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (206):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/18 13:12 upstream 52da431bf03b ca631f70 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/18 12:36 upstream 52da431bf03b ca631f70 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/18 11:55 upstream 52da431bf03b ca631f70 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 09:52 upstream 78f4e737a53e 1a7fb460 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in hashtab_init
2025/06/24 06:45 upstream 78f4e737a53e 1a7fb460 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in hashtab_init
2025/06/22 22:37 upstream b67ec639010f d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in hashtab_init
2025/06/22 09:29 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in hashtab_init
2025/06/25 09:56 upstream 7595b66ae9de 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/25 08:39 upstream 7595b66ae9de 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/25 07:06 upstream 7595b66ae9de 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/25 06:43 upstream 7595b66ae9de 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/25 02:52 upstream 7595b66ae9de 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/25 00:46 upstream 78f4e737a53e 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 22:18 upstream 78f4e737a53e 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 20:02 upstream 78f4e737a53e 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 20:02 upstream 78f4e737a53e 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 16:08 upstream 78f4e737a53e e2f27c35 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 08:18 upstream 78f4e737a53e e2f27c35 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 03:48 upstream 78f4e737a53e 1a7fb460 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 02:40 upstream 78f4e737a53e 1a7fb460 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/24 00:08 upstream 78f4e737a53e 1a7fb460 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 20:51 upstream 86731a2a651e 1a7fb460 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 18:05 upstream 86731a2a651e 1a7fb460 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 15:58 upstream 86731a2a651e d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 14:22 upstream 86731a2a651e d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 13:40 upstream 86731a2a651e d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 08:27 upstream b67ec639010f d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 07:25 upstream b67ec639010f d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 06:20 upstream b67ec639010f d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 04:03 upstream b67ec639010f d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/23 00:50 upstream b67ec639010f d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 23:42 upstream b67ec639010f d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 19:15 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 17:54 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 17:04 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 15:35 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 14:24 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 12:23 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 10:10 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 07:47 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 04:40 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/22 02:10 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/21 23:59 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/21 20:57 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/21 18:58 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/21 17:36 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/21 15:32 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/21 12:06 upstream 11313e2f7812 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in hashtab_init
2025/06/20 20:04 upstream 75f5f23f8787 804b3919 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in hashtab_init
* Struck through repros no longer work on HEAD.