general protection fault in shmem

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
f780e022-f2d6-48b5-8aaf-51f6c13faa6b	assessment-security		💥	general protection fault in shmem_mapping	2026/05/19 23:18	2026/05/19 23:18	2026/05/19 23:52	1d9407ad5a662c921fc0d659cf022b438c0bde91	failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/c3d0a4670d3ea4d35d5cf156a64b95e108a9a4e9" "-s" "bzImage" "compile_commands.json"]: exit status 2 Root cause: ld.lld: error: undefined symbol: wcslen * * Restart config... * * * General setup * Compile also drivers which will not load (COMPILE_TEST) [N/y/?] n Compile the kernel with warnings as errors (WERROR) [N/y/?] n Local version - append to kernel release (LOCALVERSION) [] Automatically append version information to the version string (LOCALVERSION_AUTO) [Y/n/?] y Build ID Salt (BUILD_SALT) [] Kernel compression mode > 1. Gzip (KERNEL_GZIP) 2. Bzip2 (KERNEL_BZIP2) 3. LZMA (KERNEL_LZMA) 4. XZ (KERNEL_XZ) 5. LZO (KERNEL_LZO) 6. LZ4 (KERNEL_LZ4) 7. ZSTD (KERNEL_ZSTD) choice[1-7?]: 1 Default init path (DEFAULT_INIT) [] Default hostname (DEFAULT_HOSTNAME) [(none)] (none) System V IPC (SYSVIPC) [Y/n/?] y POSIX Message Queues (POSIX_MQUEUE) [Y/n/?] y General notification queue (WATCH_QUEUE) [Y/n/?] y Enable process_vm_readv/writev syscalls (CROSS_MEMORY_ATTACH) [Y/n/?] y uselib syscall (for libc5 and earlier) (USELIB) [N/y/?] n Auditing support (AUDIT) [Y/?] y Preemption Model 1. No Forced Preemption (Server) (PREEMPT_NONE) 2. Voluntary Kernel Preemption (Desktop) (PREEMPT_VOLUNTARY) > 3. Preemptible Kernel (Low-Latency Desktop) (PREEMPT) 4. Scheduler controlled preemption model (PREEMPT_LAZY) choice[1-4?]: 3 Fully Preemptible Kernel (Real-Time) (PREEMPT_RT) [N/y/?] n Preemption behaviour defined on boot (PREEMPT_DYNAMIC) [Y/n/?] y Core Scheduling for SMT (SCHED_CORE) [Y/n/?] y CPU isolation (CPU_ISOLATION) [Y/n/?] y Kernel .config support (IKCONFIG) [Y/n/m/?] y Enable access to .config through /proc/config.gz (IKCONFIG_PROC) [Y/n/?] y Enable kernel headers through /sys/kernel/kheaders.tar.xz (IKHEADERS) [N/m/y/?] n Kernel log buffer size (16 => 64KB, 17 => 128KB) (LOG_BUF_SHIFT) [18] 18 CPU kernel log buffer size contribution (13 => 8 KB, 17 => 128KB) (LOG_CPU_MAX_BUF_SHIFT) [12] 12 Printk indexing debugfs interface (PRINTK_INDEX) [N/y/?] n Memory placement aware NUMA scheduler (NUMA_BALANCING) [Y/n/?] y Automatically enable NUMA aware memory/task placement (NUMA_BALANCING_DEFAULT_ENABLED) [Y/n/?] y Checkpoint/restore support (CHECKPOINT_RESTORE) [Y/n/?] y Automatic process group scheduling (SCHED_AUTOGROUP) [N/y/?] n Kernel->user space relay support (formerly relayfs) (RELAY) [Y/?] y Initial RAM filesystem and RAM disk (initramfs/initrd) support (BLK_DEV_INITRD) [Y/n/?] y Initramfs source file(s) (INITRAMFS_SOURCE) [] Support initial ramdisk/ramfs compressed using gzip (RD_GZIP) [Y/n/?] y Support initial ramdisk/ramfs compressed using bzip2 (RD_BZIP2) [Y/n/?] y Support initial ramdisk/ramfs compressed using LZMA (RD_LZMA) [Y/n/?] y Support initial ramdisk/ramfs compressed using XZ (RD_XZ) [Y/n/?] y Support initial ramdisk/ramfs compressed using LZO (RD_LZO) [Y/n/?] y Support initial ramdisk/ramfs compressed using LZ4 (RD_LZ4) [Y/n/?] y Support initial ramdisk/ramfs compressed using ZSTD (RD_ZSTD) [Y/n/?] y Boot config support (BOOT_CONFIG) [N/y/?] n Preserve cpio archive mtimes in initramfs (INITRAMFS_PRESERVE_MTIME) [Y/n/?] y Compiler optimization level > 1. Optimize for performance (-O2) (CC_OPTIMIZE_FOR_PERFORMANCE) 2. Optimize for size (-Os) (CC_OPTIMIZE_FOR_SIZE) choice[1-2?]: 1 Enable madvise/fadvise syscalls (ADVISE_SYSCALLS) [Y/n/?] y Enable membarrier() system call (MEMBARRIER) [Y/?] y Enable kcmp() system call (KCMP) [Y/?] y Enable rseq() system call (RSEQ) [Y/n/?] y Enable debugging of rseq() system call (DEBUG_RSEQ) [N/y/?] n Enable cachestat() system call (CACHESTAT_SYSCALL) [Y/n/?] y PC/104 support (PC104) [N/y/?] n Load all symbols for debugging/ksymoops (KALLSYMS) [Y/?] y Test the basic functions and performance of kallsyms (KALLSYMS_SELFTEST) [N/y/?] n Include all symbols in kallsyms (KALLSYMS_ALL) [Y/?] y Profiling support (PROFILING) [Y/n/?] y Rust support (RUST) [N/y/?] (NE

Title	Replies (including bot)	Last reply
[syzbot] [mm?] general protection fault in shmem_mapping	4 (9)	2025/02/15 01:15

Title

Replies (including bot)

Last reply

[syzbot] [mm?] general protection fault in shmem_mapping

4 (9)

2025/02/15 01:15

Created	Duration	User	Patch	Repo	Result
2025/02/15 00:48	26m	ziy@nvidia.com	patch	git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git df5d6180169a	OK log
2025/02/15 00:13	27m	ziy@nvidia.com	patch	git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git df5d6180169a	OK log
2025/02/14 23:28	0m	ziy@nvidia.com		git@github.com:x-y-z/linux-1gb-thp.git syzkaller_fix_20250114	error

Created

Duration

User

Patch

Repo

Result

2025/02/15 00:48

26m

ziy@nvidia.com

patch

git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git df5d6180169a

OK log

2025/02/15 00:13

27m

ziy@nvidia.com

patch

git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git df5d6180169a

OK log

2025/02/14 23:28

ziy@nvidia.com

git@github.com:x-y-z/linux-1gb-thp.git syzkaller_fix_20250114

error

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000024: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000120-0x0000000000000127] CPU: 1 UID: 0 PID: 5949 Comm: syz-executor163 Not tainted 6.14.0-rc2-next-20250210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:shmem_mapping+0x25/0x50 mm/shmem.c:281 Code: 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 c3 3a bd ff 48 81 c3 20 01 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 dd 35 24 00 48 c7 c0 80 6c 14 8c 48 RSP: 0018:ffffc90004036dd8 EFLAGS: 00010006 RAX: 0000000000000024 RBX: 0000000000000120 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000600 RDI: 0000000000000000 RBP: 0000000000000600 R08: ffffffff822bcf18 R09: 1ffffd4000331008 R10: dffffc0000000000 R11: fffff94000331009 R12: ffffea0001988018 R13: ffffea0001988080 R14: ffffea0001988018 R15: ffffea0001988000 FS: 00007f5e045316c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e0458dae0 CR3: 0000000023c78000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __split_unmapped_folio+0x238a/0x3e50 mm/huge_memory.c:3587 __folio_split+0x1267/0x16d0 mm/huge_memory.c:3871 try_folio_split include/linux/huge_mm.h:374 [inline] truncate_inode_partial_folio+0x55d/0xdc0 mm/truncate.c:230 shmem_undo_range+0xab7/0x1820 mm/shmem.c:1144 shmem_truncate_range mm/shmem.c:1224 [inline] shmem_fallocate+0x431/0xf20 mm/shmem.c:3674 vfs_fallocate+0x623/0x7a0 fs/open.c:338 madvise_remove mm/madvise.c:1034 [inline] madvise_vma_behavior mm/madvise.c:1269 [inline] madvise_walk_vmas mm/madvise.c:1511 [inline] madvise_do_behavior+0x1f29/0x3c00 mm/madvise.c:1646 do_madvise mm/madvise.c:1744 [inline] __do_sys_madvise mm/madvise.c:1752 [inline] __se_sys_madvise mm/madvise.c:1750 [inline] __x64_sys_madvise+0x11b/0x140 mm/madvise.c:1750 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5e04576519 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e04531218 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f5e04600308 RCX: 00007f5e04576519 RDX: 0000000000000009 RSI: 0000000000600003 RDI: 0000400000000000 RBP: 00007f5e04600300 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5e045cd074 R13: 0000400000000000 R14: 0000400000000140 R15: 0000400000000040 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:shmem_mapping+0x25/0x50 mm/shmem.c:281 Code: 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 c3 3a bd ff 48 81 c3 20 01 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 dd 35 24 00 48 c7 c0 80 6c 14 8c 48 RSP: 0018:ffffc90004036dd8 EFLAGS: 00010006 RAX: 0000000000000024 RBX: 0000000000000120 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000600 RDI: 0000000000000000 RBP: 0000000000000600 R08: ffffffff822bcf18 R09: 1ffffd4000331008 R10: dffffc0000000000 R11: fffff94000331009 R12: ffffea0001988018 R13: ffffea0001988080 R14: ffffea0001988018 R15: ffffea0001988000 FS: 00007f5e045316c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e0458dae0 CR3: 0000000023c78000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: f3 0f 1e fa endbr64 9: 53 push %rbx a: 48 89 fb mov %rdi,%rbx d: e8 c3 3a bd ff call 0xffbd3ad5 12: 48 81 c3 20 01 00 00 add $0x120,%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 dd 35 24 00 call 0x243615 38: 48 c7 c0 80 6c 14 8c mov $0xffffffff8c146c80,%rax 3f: 48 rex.W

Crashes (17):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/02/10 23:27	linux-next	df5d6180169a	43f51a00	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/10 22:33	linux-next	df5d6180169a	43f51a00	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/10 21:43	linux-next	df5d6180169a	43f51a00	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/10 20:20	linux-next	df5d6180169a	43f51a00	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/17 00:43	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/17 00:43	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/17 00:43	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/16 20:48	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/16 16:05	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/16 12:47	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/15 11:49	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/15 11:48	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/14 22:54	linux-next	0ae0fa3bf0b4	40a34ec9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/11 17:30	linux-next	df5d6180169a	f2baddf5	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/10 17:08	linux-next	df5d6180169a	43f51a00	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/10 15:45	linux-next	df5d6180169a	43f51a00	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping
2025/02/10 15:45	linux-next	df5d6180169a	43f51a00	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	general protection fault in shmem_mapping

Crashes (17):

Assets (help?)

2025/02/10 23:27

linux-next