syzkaller login: [ 38.689763] BUG: Bad rss-counter state mm:000000001f4ed23f type:MM_FILEPAGES val:33 [ 38.690518] BUG: Bad rss-counter state mm:000000001f4ed23f type:MM_ANONPAGES val:22 [ 38.821828] ================================================================== [ 38.822923] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.824019] Read of size 8 at addr ffff88801021b880 by task sshd/221 [ 38.824877] [ 38.825094] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.825939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.826914] Call Trace: [ 38.827239] [ 38.827521] dump_stack_lvl+0x91/0xf0 [ 38.828009] print_report+0xcc/0x620 [ 38.828489] ? __virt_addr_valid+0x102/0x340 [ 38.829035] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.829657] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830274] kasan_report+0xbe/0xf0 [ 38.830742] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831366] vma_interval_tree_remove+0xc75/0xec0 [ 38.831969] vma_prepare+0xc54/0x11a0 [ 38.832447] __split_vma+0x5af/0x950 [ 38.832914] ? __pfx___split_vma+0x10/0x10 [ 38.833444] ? find_held_lock+0x2c/0x110 [ 38.833963] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.834532] ? lock_is_held_type+0x9f/0x120 [ 38.835069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.835697] ? mtree_range_walk+0x632/0x900 [ 38.836241] ? mas_walk+0x5c7/0x7c0 [ 38.836718] do_vmi_munmap+0x1f1/0x2b0 [ 38.837203] mmap_region+0x1f9/0x2660 [ 38.837680] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.838193] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.838906] ? __pfx_lock_acquire+0x10/0x10 [ 38.839447] ? __pfx_mmap_region+0x10/0x10 [ 38.839970] ? security_mmap_addr+0x7d/0xa0 [ 38.840499] ? get_unmapped_area+0x1f5/0x3f0 [ 38.841043] do_mmap+0x854/0xf00 [ 38.841479] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.841968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.842528] ksys_mmap_pgoff+0x3af/0x500 [ 38.843027] do_syscall_64+0x3f/0x90 [ 38.843512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.844152] RIP: 0033:0x7f1b8872ed82 [ 38.844600] 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 [ 38.846701] RSP: 002b:00007fff39414408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.847615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b8872ed82 [ 38.848451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b87b68000 [ 38.849283] RBP: 00007f1b87b68000 R08: 0000000000000009 R09: 0000000000001000 [ 38.850122] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b00ada2ec0 [ 38.850969] R13: 00007fff39414420 R14: 00007fff39414450 R15: 00007fff394147b0 [ 38.851833] [ 38.852120] [ 38.852333] Allocated by task 214: [ 38.852761] kasan_save_stack+0x22/0x50 [ 38.853262] kasan_set_track+0x25/0x30 [ 38.853746] __kasan_slab_alloc+0x59/0x70 [ 38.854272] kmem_cache_alloc+0x16b/0x370 [ 38.854777] vm_area_dup+0x20/0x160 [ 38.855243] __split_vma+0x170/0x950 [ 38.855708] split_vma+0xc6/0x110 [ 38.856142] mprotect_fixup+0x8d2/0xb30 [ 38.856639] do_mprotect_pkey+0x87e/0xd40 [ 38.857159] __x64_sys_mprotect+0x78/0xc0 [ 38.857675] do_syscall_64+0x3f/0x90 [ 38.858144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.858780] [ 38.858993] Freed by task 13: [ 38.859385] kasan_save_stack+0x22/0x50 [ 38.859882] kasan_set_track+0x25/0x30 [ 38.860368] kasan_save_free_info+0x2b/0x50 [ 38.860895] __kasan_slab_free+0x10a/0x190 [ 38.861422] kmem_cache_free+0x10d/0x4d0 [ 38.861921] rcu_core+0x8c8/0x2860 [ 38.862366] __do_softirq+0x1b7/0x7d4 [ 38.862839] [ 38.863052] Last potentially related work creation: [ 38.863633] kasan_save_stack+0x22/0x50 [ 38.864130] __kasan_record_aux_stack+0x8e/0xa0 [ 38.864693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.865327] remove_vma+0x139/0x170 [ 38.865772] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.866327] do_vmi_munmap+0x1f1/0x2b0 [ 38.866806] __vm_munmap+0x138/0x3a0 [ 38.867286] __x64_sys_munmap+0x59/0x80 [ 38.867779] do_syscall_64+0x3f/0x90 [ 38.868250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.868884] [ 38.869099] The buggy address belongs to the object at ffff88801021b828 [ 38.869099] which belongs to the cache vm_area_struct of size 168 [ 38.870550] The buggy address is located 88 bytes inside of [ 38.870550] freed 168-byte region [ffff88801021b828, ffff88801021b8d0) [ 38.871948] [ 38.872162] The buggy address belongs to the physical page: [ 38.872815] page:000000006e3662b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1021b [ 38.873900] memcg:ffff88800e808b01 [ 38.874323] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.875009] page_type: 0xffffffff() [ 38.875476] raw: 0100000000000200 ffff8880087a0c80 ffffea000040e800 dead000000000005 [ 38.876388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e808b01 [ 38.877285] page dumped because: kasan: bad access detected [ 38.877939] [ 38.878153] Memory state around the buggy address: [ 38.878728] ffff88801021b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.879584] ffff88801021b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.880438] >ffff88801021b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.881284] ^ [ 38.881693] ffff88801021b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.882544] ffff88801021b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.883400] ================================================================== [ 38.884367] Disabling lock debugging due to kernel taint [ 40.805707] BUG: Bad rss-counter state mm:00000000d02e51a0 type:MM_FILEPAGES val:33 [ 40.806684] BUG: Bad rss-counter state mm:00000000d02e51a0 type:MM_ANONPAGES val:22 [ 41.279727] BUG: Bad rss-counter state mm:00000000d261170c type:MM_FILEPAGES val:33 [ 41.280993] BUG: Bad rss-counter state mm:00000000d261170c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24970' (ECDSA) to the list of known hosts. 2023/06/20 14:24:03 fuzzer started 2023/06/20 14:24:03 dialing manager at localhost:36067 2023/06/20 14:24:03 checking machine... 2023/06/20 14:24:03 checking revisions... [ 42.015267] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:24:04 testing simple program... [ 42.064082] cgroup: Unknown subsys name 'net' [ 42.107362] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:03 Registers: info registers vcpu 0 RAX=0000000000003c0d RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000003c14 RSI=0000000000000bd0 RDI=000000000000b43c RBP=ffff88801954fa38 RSP=ffff88801954f920 R8 =ffffffff8608a556 R9 =ffff88801954fa20 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801954fa40 R13=ffff88801954fa28 R14=ffff88801954fa21 R15=ffff88801954f9e0 RIP=ffffffff81130859 RFL=00000293 [--S-A-C] 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 00007f5dd7e4d900 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=00007f5dd8404618 CR3=000000001c950000 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=ffff88800cbd0001 RBX=ffff88800cbcf388 RCX=0000000000000001 RDX=ffff88800cbcf701 RSI=ffff88800cbcf7a8 RDI=ffff88800cbcf398 RBP=ffff88800cbcf7a8 RSP=ffff88800cbcf2e0 R8 =0000000000000001 R9 =ffff88800cbcf3c8 R10=0000000000038001 R11=00000000000b3bfc R12=0000000000000008 R13=ffff88800cbc8000 R14=ffff88800cbcf7a8 R15=ffff88800cbcf388 RIP=ffffffff8113048d RFL=00000287 [--S--PC] 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=00007f335cda8028 CR3=0000000017e22000 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=756e696c2d34365f3638782f62696c2f XMM01=00362e6f732e6362696c2f756e672d78 XMM02=ffffffffffffffffffffffffffffffff XMM03=ffffffffffffffffffffffffffffffff XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000