Hello, syzbot found the following issue on: HEAD commit: 0fed89a961ea Merge tag 'hyperv-fixes-signed-20250311' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17ea1874580000 kernel config: https://syzkaller.appspot.com/x/.config?x=31c94a07ddad0b00 dashboard link: https://syzkaller.appspot.com/bug?extid=85a56f124ac1ea0ac0cb compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16124c78580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-0fed89a9.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9e4d0fd4258e/vmlinux-0fed89a9.xz kernel image: https://storage.googleapis.com/syzbot-assets/ea186f3b1240/bzImage-0fed89a9.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/2c3be83f8b9f/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+85a56f124ac1ea0ac0cb@xxxxxxxxxxxxxxxxxxxxxxxxx Oops: general protection fault, probably for non-canonical address 0x7d0034f00001880: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5719 Comm: syz.4.37 Not tainted 6.14.0-rc6-syzkaller-00016-g0fed89a961ea #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:get_freepointer mm/slub.c:504 [inline] RIP: 0010:get_freepointer_safe mm/slub.c:532 [inline] RIP: 0010:__slab_alloc_node mm/slub.c:3993 [inline] RIP: 0010:slab_alloc_node mm/slub.c:4152 [inline] RIP: 0010:kmem_cache_alloc_lru_noprof+0xed/0x390 mm/slub.c:4183 Code: 0f 84 8e 01 00 00 41 83 f8 ff 74 1a 48 8b 03 48 83 f8 ff 0f 84 97 02 00 00 48 c1 e8 3a 41 39 c0 0f 85 6e 01 00 00 41 8b 47 28 <4a> 8b 1c 20 49 8d 4d 08 49 8b 37 4c 89 e0 4c 89 ea 65 48 0f c7 0e RSP: 0018:ffffc9000d037478 EFLAGS: 00010046 RAX: 0000000000000240 RBX: ffffea0000ecb880 RCX: 0000000000043ba0 RDX: 0000000000000001 RSI: 0000000000000240 RDI: ffffffff8ec54460 RBP: ffffffff8c06a1c0 R08: 00000000ffffffff R09: fffff52001a06ea8 R10: dffffc0000000000 R11: fffff52001a06ea8 R12: 07d0034f00001640 R13: 0000000000016220 R14: 0000000000402800 R15: ffff88801b04fdc0 FS: 00007fd8409fe6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa6ac013000 CR3: 0000000012b64000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> xas_alloc lib/xarray.c:377 [inline] xas_create+0x10d0/0x1ae0 lib/xarray.c:684 xas_store+0x96/0x1870 lib/xarray.c:794 shmem_add_to_page_cache+0x89d/0xcc0 mm/shmem.c:897 shmem_alloc_and_add_folio+0x968/0x1090 mm/shmem.c:1928 shmem_get_folio_gfp+0x621/0x1840 mm/shmem.c:2545 shmem_get_folio mm/shmem.c:2651 [inline] shmem_write_begin+0x165/0x350 mm/shmem.c:3301 generic_perform_write+0x346/0x990 mm/filemap.c:4188 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3477 new_sync_write fs/read_write.c:586 [inline] vfs_write+0xacf/0xd10 fs/read_write.c:679 ksys_write+0x18f/0x2b0 fs/read_write.c:731 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: 0033:0x7fd84178bc1f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48 RSP: 002b:00007fd8409fddf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007fd84178bc1f RDX: 0000000001000000 RSI: 00007fd838400000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000590c R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003 R13: 00007fd8409fdef0 R14: 00007fd8409fdeb0 R15: 00007fd838400000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:get_freepointer mm/slub.c:504 [inline] RIP: 0010:get_freepointer_safe mm/slub.c:532 [inline] RIP: 0010:__slab_alloc_node mm/slub.c:3993 [inline] RIP: 0010:slab_alloc_node mm/slub.c:4152 [inline] RIP: 0010:kmem_cache_alloc_lru_noprof+0xed/0x390 mm/slub.c:4183 Code: 0f 84 8e 01 00 00 41 83 f8 ff 74 1a 48 8b 03 48 83 f8 ff 0f 84 97 02 00 00 48 c1 e8 3a 41 39 c0 0f 85 6e 01 00 00 41 8b 47 28 <4a> 8b 1c 20 49 8d 4d 08 49 8b 37 4c 89 e0 4c 89 ea 65 48 0f c7 0e RSP: 0018:ffffc9000d037478 EFLAGS: 00010046 RAX: 0000000000000240 RBX: ffffea0000ecb880 RCX: 0000000000043ba0 RDX: 0000000000000001 RSI: 0000000000000240 RDI: ffffffff8ec54460 RBP: ffffffff8c06a1c0 R08: 00000000ffffffff R09: fffff52001a06ea8 R10: dffffc0000000000 R11: fffff52001a06ea8 R12: 07d0034f00001640 R13: 0000000000016220 R14: 0000000000402800 R15: ffff88801b04fdc0 FS: 00007fd8409fe6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa6ac013000 CR3: 0000000012b64000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 84 8e 01 00 00 je 0x194 6: 41 83 f8 ff cmp $0xffffffff,%r8d a: 74 1a je 0x26 c: 48 8b 03 mov (%rbx),%rax f: 48 83 f8 ff cmp $0xffffffffffffffff,%rax 13: 0f 84 97 02 00 00 je 0x2b0 19: 48 c1 e8 3a shr $0x3a,%rax 1d: 41 39 c0 cmp %eax,%r8d 20: 0f 85 6e 01 00 00 jne 0x194 26: 41 8b 47 28 mov 0x28(%r15),%eax * 2a: 4a 8b 1c 20 mov (%rax,%r12,1),%rbx <-- trapping instruction 2e: 49 8d 4d 08 lea 0x8(%r13),%rcx 32: 49 8b 37 mov (%r15),%rsi 35: 4c 89 e0 mov %r12,%rax 38: 4c 89 ea mov %r13,%rdx 3b: 65 48 0f c7 0e cmpxchg16b %gs:(%rsi) --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
