syzkaller login: [ 25.189402] BUG: Bad rss-counter state mm:000000004ab33a7d type:MM_FILEPAGES val:33 [ 25.190639] BUG: Bad rss-counter state mm:000000004ab33a7d type:MM_ANONPAGES val:22 [ 25.339545] ================================================================== [ 25.340506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.341477] Read of size 8 at addr ffff888013b613f8 by task sshd/219 [ 25.342310] [ 25.342620] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.343487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.344454] Call Trace: [ 25.344796] [ 25.345083] dump_stack_lvl+0x91/0xf0 [ 25.345587] print_report+0xcc/0x620 [ 25.346066] ? __virt_addr_valid+0x102/0x340 [ 25.346621] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.347256] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.347897] kasan_report+0xbe/0xf0 [ 25.348379] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.349005] vma_interval_tree_remove+0xc75/0xec0 [ 25.349614] vma_prepare+0xc54/0x11a0 [ 25.350095] __split_vma+0x5af/0x950 [ 25.350573] ? __pfx___split_vma+0x10/0x10 [ 25.351111] ? find_held_lock+0x2c/0x110 [ 25.351636] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.352206] ? lock_is_held_type+0x9f/0x120 [ 25.352754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.353375] ? mtree_range_walk+0x632/0x900 [ 25.353926] ? mas_walk+0x5c7/0x7c0 [ 25.354395] do_vmi_munmap+0x1f1/0x2b0 [ 25.354884] mmap_region+0x1f9/0x2660 [ 25.355368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.355880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.356589] ? __pfx_lock_acquire+0x10/0x10 [ 25.357126] ? __pfx_mmap_region+0x10/0x10 [ 25.357691] ? security_mmap_addr+0x7d/0xa0 [ 25.358222] ? get_unmapped_area+0x1f5/0x3f0 [ 25.358774] do_mmap+0x854/0xf00 [ 25.359206] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.359702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.360264] ksys_mmap_pgoff+0x3af/0x500 [ 25.360770] do_syscall_64+0x3f/0x90 [ 25.361245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.361914] RIP: 0033:0x7fcf8fbcdd82 [ 25.362367] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 25.364501] RSP: 002b:00007ffc75a09018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.365429] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf8fbcdd82 [ 25.366281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf8f007000 [ 25.367122] RBP: 00007fcf8f007000 R08: 0000000000000009 R09: 0000000000001000 [ 25.367974] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561577982ec0 [ 25.368814] R13: 00007ffc75a09030 R14: 00007ffc75a09060 R15: 00007ffc75a093c0 [ 25.369693] [ 25.369998] [ 25.370251] Allocated by task 212: [ 25.370690] kasan_save_stack+0x22/0x50 [ 25.371207] kasan_set_track+0x25/0x30 [ 25.371713] __kasan_slab_alloc+0x59/0x70 [ 25.372235] kmem_cache_alloc+0x16b/0x370 [ 25.372755] vm_area_dup+0x20/0x160 [ 25.373211] __split_vma+0x170/0x950 [ 25.373717] split_vma+0xc6/0x110 [ 25.374162] mprotect_fixup+0x8d2/0xb30 [ 25.374672] do_mprotect_pkey+0x87e/0xd40 [ 25.375201] __x64_sys_mprotect+0x78/0xc0 [ 25.375739] do_syscall_64+0x3f/0x90 [ 25.376218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.376866] [ 25.377085] Freed by task 212: [ 25.377492] kasan_save_stack+0x22/0x50 [ 25.377992] kasan_set_track+0x25/0x30 [ 25.378491] kasan_save_free_info+0x2b/0x50 [ 25.379026] __kasan_slab_free+0x10a/0x190 [ 25.379557] kmem_cache_free+0x10d/0x4d0 [ 25.380065] rcu_core+0x8c8/0x2860 [ 25.380506] __do_softirq+0x1b7/0x7d4 [ 25.380981] [ 25.381201] Last potentially related work creation: [ 25.381796] kasan_save_stack+0x22/0x50 [ 25.382299] __kasan_record_aux_stack+0x8e/0xa0 [ 25.382873] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.383512] remove_vma+0x139/0x170 [ 25.383963] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.384525] do_vmi_munmap+0x1f1/0x2b0 [ 25.385007] __vm_munmap+0x138/0x3a0 [ 25.385490] __x64_sys_munmap+0x59/0x80 [ 25.385992] do_syscall_64+0x3f/0x90 [ 25.386469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.387112] [ 25.387348] Second to last potentially related work creation: [ 25.388041] kasan_save_stack+0x22/0x50 [ 25.388551] __kasan_record_aux_stack+0x8e/0xa0 [ 25.389121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.389788] remove_vma+0x139/0x170 [ 25.390247] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.390804] do_vmi_munmap+0x1f1/0x2b0 [ 25.391296] __vm_munmap+0x138/0x3a0 [ 25.391761] elf_map+0x26f/0x310 [ 25.392206] load_elf_binary+0x3417/0x5030 [ 25.392741] bprm_execve+0x803/0x1940 [ 25.393214] do_execveat_common+0x734/0x8e0 [ 25.393759] __x64_sys_execve+0x93/0xc0 [ 25.394252] do_syscall_64+0x3f/0x90 [ 25.394736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.395377] [ 25.395594] The buggy address belongs to the object at ffff888013b613a0 [ 25.395594] which belongs to the cache vm_area_struct of size 168 [ 25.397047] The buggy address is located 88 bytes inside of [ 25.397047] freed 168-byte region [ffff888013b613a0, ffff888013b61448) [ 25.398453] [ 25.398670] The buggy address belongs to the physical page: [ 25.399328] page:0000000088794a15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13b61 [ 25.400423] memcg:ffff888013b14501 [ 25.400848] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.401505] page_type: 0xffffffff() [ 25.401959] raw: 0100000000000200 ffff88800879fc80 ffffea000037a740 dead000000000004 [ 25.402873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b14501 [ 25.403772] page dumped because: kasan: bad access detected [ 25.404425] [ 25.404641] Memory state around the buggy address: [ 25.405217] ffff888013b61280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 25.406075] ffff888013b61300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 25.406922] >ffff888013b61380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 25.407770] ^ [ 25.408617] ffff888013b61400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.409483] ffff888013b61480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.410328] ================================================================== [ 25.411558] Disabling lock debugging due to kernel taint [ 27.705679] BUG: Bad rss-counter state mm:0000000056b30b60 type:MM_FILEPAGES val:33 [ 27.706800] BUG: Bad rss-counter state mm:0000000056b30b60 type:MM_ANONPAGES val:22 [ 28.088963] BUG: Bad rss-counter state mm:00000000c4327cca type:MM_FILEPAGES val:33 [ 28.090190] BUG: Bad rss-counter state mm:00000000c4327cca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28979' (ECDSA) to the list of known hosts. 2023/06/19 14:14:12 fuzzer started 2023/06/19 14:14:12 dialing manager at localhost:44161 2023/06/19 14:14:12 checking machine... 2023/06/19 14:14:12 checking revisions... [ 28.806158] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:14:12 testing simple program... [ 28.852377] cgroup: Unknown subsys name 'net' [ 28.891593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:14:10 Registers: info registers vcpu 0 RAX=ffffed10030bf6b8 RBX=ffff888009a6c000 RCX=ffffffff83ab403d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f9468c RBP=0000000014faf541 RSP=ffff88801a3b7508 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff83ab409b RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5677210900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f56777c7618 CR3=000000000ed8e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800f380000 RSI=ffffffff81b25baf RDI=0000000000000004 RBP=ffffea000070d300 RSP=ffff88800f38f238 R8 =0000000000000004 R9 =0000000000000756 R10=0000000000001b1f R11=0000000000000000 R12=ffff88800f38f638 R13=ffff88800f38f638 R14=0000000000001b1f R15=0000000000000755 RIP=ffffffff81b25bba RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f47d99d3a80 CR3=000000000eefa000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=c1fe59a8fed23e8504488a55c5d111fa XMM02=ec2efd57dc4c00df0000000000120038 XMM03=1c7ef7d07062a3ca0000000000120108 XMM04=25f2a7df6d033f6900000000000ae988 XMM05=ff31ed6cbc3474eb00000000001357e8 XMM06=806171799158d9670000000000134e70 XMM07=e042d86d42eb936e0000000000124028 XMM08=1c7ef7d07062a3ca0000000000120108 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000