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Message-ID: <68cd2c2b.a00a0220.37dadf.001a.GAE@google.com> Date: Fri, 19 Sep 2025 03:10:51 -0700 From: syzbot ci <syzbot+ci5a8560c05ff0980d@...kaller.appspotmail.com> To: akpm@...ux-foundation.org, bhe@...hat.com, changyuanl@...gle.com, cwang@...tikernel.io, graf@...zon.com, kexec@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, pasha.tatashin@...een.com, rppt@...nel.org, xiyou.wangcong@...il.com Cc: syzbot@...ts.linux.dev, syzkaller-bugs@...glegroups.com Subject: [syzbot ci] Re: kernel: Introduce multikernel architecture support syzbot ci has tested the following series [v1] kernel: Introduce multikernel architecture support https://lore.kernel.org/all/20250918222607.186488-1-xiyou.wangcong@gmail.com * [RFC Patch 1/7] kexec: Introduce multikernel support via kexec * [RFC Patch 2/7] x86: Introduce SMP INIT trampoline for multikernel CPU bootstrap * [RFC Patch 3/7] x86: Introduce MULTIKERNEL_VECTOR for inter-kernel communication * [RFC Patch 4/7] kernel: Introduce generic multikernel IPI communication framework * [RFC Patch 5/7] x86: Introduce arch_cpu_physical_id() to obtain physical CPU ID * [RFC Patch 6/7] kexec: Implement dynamic kimage tracking * [RFC Patch 7/7] kexec: Add /proc/multikernel interface for kimage tracking and found the following issue: WARNING in note_page Full report is available here: https://ci.syzbot.org/series/9ca759c7-776a-4d45-a2f9-5e6ca245e989 *** WARNING in note_page tree: torvalds URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux base: f83ec76bf285bea5727f478a68b894f5543ca76e arch: amd64 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 config: https://ci.syzbot.org/builds/645f543b-aa06-4977-81f2-45a0b44a2133/config Key type fscrypt-provisioning registered kAFS: Red Hat AFS client v0.1 registering. Btrfs loaded, assert=on, ref-verify=on, zoned=yes, fsverity=yes Key type big_key registered Key type encrypted registered AppArmor: AppArmor sha256 policy hashing enabled ima: No TPM chip found, activating TPM-bypass! Loading compiled-in module X.509 certificates Loaded X.509 cert 'Build time autogenerated kernel key: 75e3f237904f24df4a2b6e4eae1a8f34effb6643' ima: Allocated hash algorithm: sha256 ima: No architecture policies found evm: Initialising EVM extended attributes: evm: security.selinux (disabled) evm: security.SMACK64 (disabled) evm: security.SMACK64EXEC (disabled) evm: security.SMACK64TRANSMUTE (disabled) evm: security.SMACK64MMAP (disabled) evm: security.apparmor evm: security.ima evm: security.capability evm: HMAC attrs: 0x1 PM: Magic number: 9:738:504 usb usb41-port1: hash matches usb usb40-port2: hash matches netconsole: network logging started gtp: GTP module loaded (pdp ctx size 128 bytes) rdma_rxe: loaded cfg80211: Loading compiled-in X.509 certificates for regulatory database Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600' clk: Disabling unused clocks ALSA device list: #0: Dummy 1 #1: Loopback 1 #2: Virtual MIDI Card 1 check access for rdinit=/init failed: -2, ignoring md: Waiting for all devices to be available before autodetect md: If you don't use raid, use raid=noautodetect md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. EXT4-fs (sda1): mounted filesystem b4773fba-1738-4da0-8a90-0fe043d0a496 ro with ordered data mode. Quota mode: none. VFS: Mounted root (ext4 filesystem) readonly on device 8:1. devtmpfs: mounted Freeing unused kernel image (initmem) memory: 26168K Write protecting the kernel read-only data: 210944k Freeing unused kernel image (text/rodata gap) memory: 104K Freeing unused kernel image (rodata/data gap) memory: 300K ------------[ cut here ]------------ x86/mm: Found insecure W+X mapping at address 0xffff888000096000 WARNING: CPU: 1 PID: 1 at arch/x86/mm/dump_pagetables.c:248 note_page+0x12a5/0x14a0 Modules linked in: CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:note_page+0x12a5/0x14a0 Code: d5 49 00 c6 05 bd 7d 17 0e 01 90 43 80 3c 2e 00 74 08 4c 89 ff e8 9b 47 ad 00 49 8b 37 48 c7 c7 40 98 88 8b e8 1c 53 0d 00 90 <0f> 0b 90 90 49 bd 00 00 00 00 00 fc ff df e9 5a f1 ff ff 44 89 f9 RSP: 0000:ffffc90000047678 EFLAGS: 00010246 RAX: 0829288c8ce4fa00 RBX: ffffc90000047cf0 RCX: ffff88801c2d0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bfa274 R12: ffffffffffffffff R13: dffffc0000000000 R14: 1ffff92000008fb2 R15: ffffc90000047d90 FS: 0000000000000000(0000) GS:ffff8881a3c09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000df36000 CR4: 00000000000006f0 Call Trace: <TASK> ptdump_pte_entry+0xc6/0xe0 walk_pte_range_inner+0x1ba/0x380 walk_pgd_range+0x1467/0x1d40 walk_page_range_debug+0x312/0x3d0 ptdump_walk_pgd+0x126/0x320 ptdump_walk_pgd_level_core+0x260/0x3e0 kernel_init+0x53/0x1d0 ret_from_fork+0x439/0x7d0 ret_from_fork_asm+0x1a/0x30 </TASK> *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@...kaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@...glegroups.com.
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