BUG: Bad page state in corrupted

Status: upstream: reported C repro on 2026/08/13 00:08
Subsystems: mm
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+237bbeed8dfe0699b7f5@syzkaller.appspotmail.com
First crash: 69d, last: 2d03h
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
69b6c1ac assessment-security DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ BUG: Bad page state in corrupted 2026/08/09 02:11 2026/08/09 02:11 2026/08/09 03:27 5d63f80b
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[PATCH bpf v3 1/2] bpf, veth: xdp: fix page_pool page leak on skb-backed XDP 4 (4) 2026/09/18 01:31
[PATCH bpf v2 1/2] bpf, veth: xdp: fix page_pool page leak on skb-backed XDP 9 (9) 2026/09/04 23:16
Re: [PATCH bpf v2 2/2] selftests/bpf: add xdp_shrink_frags 1 (1) 2026/08/27 19:19
[PATCH bpf] bpf: free page_pool frags via the page_pool path in bpf_xdp_shrink_data 7 (7) 2026/08/17 14:29
Re: [PATCH bpf] bpf: free page_pool frags via the page_pool path in bpf_xdp_shrink_data 1 (1) 2026/08/17 14:29
[syzbot] [mm?] BUG: Bad page state in corrupted 1 (2) 2026/08/13 21:08
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 BUG: Bad page state in corrupted origin:lts-only -1 syz, C inconclusive 23 17d 661d 0/3 upstream: reported C repro on 2024/12/24 12:58
linux-5.15 BUG: Bad page state in corrupted origin:upstream -1 syz, C error 6 21d 696d 0/3 upstream: reported C repro on 2024/11/19 11:50
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2026/10/15 06:43 14m retest repro https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master report job log log
2026/08/24 08:47 14m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report job log log

Sample crash report:
BUG: Bad page state in process syz-executor210  pfn:112724
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000d2724480 pfn:0x112724
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 dead000000000040 ffff0000c30e0000 0000000000000000
raw: ffff0000d2724480 3fffffffffffffff 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
Modules linked in:
CPU: 1 UID: 0 PID: 4718 Comm: syz-executor210 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 bad_page+0x194/0x1d0 mm/page_alloc.c:643
 free_page_is_bad mm/page_alloc.c:1078 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xb68/0xbb8 mm/page_alloc.c:2950
 free_frozen_pages+0x14/0x20 mm/page_alloc.c:2988
 page_frag_free+0x18c/0x1e0 mm/page_frag_cache.c:169
 __xdp_return+0x200/0x738 net/core/xdp.c:448
 bpf_xdp_shrink_data+0x288/0x348 net/core/filter.c:4294
 bpf_xdp_frags_shrink_tail+0x1c0/0x424 net/core/filter.c:4318
 ____bpf_xdp_adjust_tail net/core/filter.c:4340 [inline]
 bpf_xdp_adjust_tail+0x198/0x1dc net/core/filter.c:4333
 bpf_prog_5d7dc57dfd7f985a+0x38/0x58
 bpf_dispatcher_xdp_func+0x30/0x44 net/core/filter.c:12027
 __bpf_prog_run include/linux/filter.h:724 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x4a4/0x11e0 net/core/dev.c:5498
 netif_receive_generic_xdp net/core/dev.c:5614 [inline]
 do_xdp_generic+0x97c/0x11e0 net/core/dev.c:5676
 tun_get_user+0x1e24/0x364c drivers/net/tun.c:1874
 tun_chr_write_iter+0xfc/0x168 drivers/net/tun.c:2001
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:687
 ksys_write+0x12c/0x228 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x84/0x98 fs/read_write.c:747
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:738
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590
BUG: Bad page state in process syz-executor210  pfn:113883
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000d3883c00 pfn:0x113883
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 dead000000000040 ffff0000c30e0000 0000000000000000
raw: ffff0000d3883c00 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
Modules linked in:
CPU: 1 UID: 0 PID: 4718 Comm: syz-executor210 Tainted: G    B               syzkaller #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 bad_page+0x194/0x1d0 mm/page_alloc.c:643

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/08 17:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ba5cc80fd326 5d63f80b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: Bad page state in corrupted
2026/10/01 06:17 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master 551c722f4080 38f7f0d1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 BUG: Bad page state in corrupted
* Struck through repros no longer work on HEAD.