syzkaller login: [ 30.585917] BUG: Bad rss-counter state mm:00000000f6934a3e type:MM_FILEPAGES val:33 [ 30.587879] BUG: Bad rss-counter state mm:00000000f6934a3e type:MM_ANONPAGES val:22 [ 30.749773] ================================================================== [ 30.750708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.751659] Read of size 8 at addr ffff88800eba25c8 by task sshd/219 [ 30.752442] [ 30.752669] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.753676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.754686] Call Trace: [ 30.755016] [ 30.755306] dump_stack_lvl+0x91/0xf0 [ 30.755805] print_report+0xcc/0x620 [ 30.756293] ? __virt_addr_valid+0x102/0x340 [ 30.756851] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757489] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758122] kasan_report+0xbe/0xf0 [ 30.758595] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.759217] vma_interval_tree_remove+0xc75/0xec0 [ 30.759834] vma_prepare+0xc54/0x11a0 [ 30.760317] __split_vma+0x5af/0x950 [ 30.760803] ? __pfx___split_vma+0x10/0x10 [ 30.761344] ? find_held_lock+0x2c/0x110 [ 30.761897] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.762464] ? lock_is_held_type+0x9f/0x120 [ 30.763009] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.763621] ? mtree_range_walk+0x632/0x900 [ 30.764182] ? mas_walk+0x5c7/0x7c0 [ 30.764662] do_vmi_munmap+0x1f1/0x2b0 [ 30.765162] mmap_region+0x1f9/0x2660 [ 30.765663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.766180] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.766908] ? __pfx_lock_acquire+0x10/0x10 [ 30.767450] ? __pfx_mmap_region+0x10/0x10 [ 30.767984] ? security_mmap_addr+0x7d/0xa0 [ 30.768519] ? get_unmapped_area+0x1f5/0x3f0 [ 30.769080] do_mmap+0x854/0xf00 [ 30.769534] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.770046] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.770613] ksys_mmap_pgoff+0x3af/0x500 [ 30.771127] do_syscall_64+0x3f/0x90 [ 30.771613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772266] RIP: 0033:0x7fa387885d82 [ 30.772726] 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 [ 30.774884] RSP: 002b:00007fff0bacbad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.775795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa387885d82 [ 30.776657] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa386cbf000 [ 30.777513] RBP: 00007fa386cbf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.778369] R10: 0000000000000812 R11: 0000000000000206 R12: 000056457477fec0 [ 30.779219] R13: 00007fff0bacbaf0 R14: 00007fff0bacbb20 R15: 00007fff0bacbe80 [ 30.780081] [ 30.780378] [ 30.780599] Allocated by task 212: [ 30.781030] kasan_save_stack+0x22/0x50 [ 30.781555] kasan_set_track+0x25/0x30 [ 30.782066] __kasan_slab_alloc+0x59/0x70 [ 30.782598] kmem_cache_alloc+0x16b/0x370 [ 30.783121] vm_area_dup+0x20/0x160 [ 30.783582] __split_vma+0x170/0x950 [ 30.784052] split_vma+0xc6/0x110 [ 30.784494] mprotect_fixup+0x8d2/0xb30 [ 30.785001] do_mprotect_pkey+0x87e/0xd40 [ 30.785528] __x64_sys_mprotect+0x78/0xc0 [ 30.786062] do_syscall_64+0x3f/0x90 [ 30.786539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787196] [ 30.787412] Freed by task 212: [ 30.787809] kasan_save_stack+0x22/0x50 [ 30.788323] kasan_set_track+0x25/0x30 [ 30.788836] kasan_save_free_info+0x2b/0x50 [ 30.789379] __kasan_slab_free+0x10a/0x190 [ 30.789948] kmem_cache_free+0x10d/0x4d0 [ 30.790458] rcu_core+0x8c8/0x2860 [ 30.790907] __do_softirq+0x1b7/0x7d4 [ 30.791388] [ 30.791601] Last potentially related work creation: [ 30.792193] kasan_save_stack+0x22/0x50 [ 30.792697] __kasan_record_aux_stack+0x8e/0xa0 [ 30.793275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.793925] remove_vma+0x139/0x170 [ 30.794380] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.794942] do_vmi_munmap+0x1f1/0x2b0 [ 30.795428] __vm_munmap+0x138/0x3a0 [ 30.795898] __x64_sys_munmap+0x59/0x80 [ 30.796398] do_syscall_64+0x3f/0x90 [ 30.796875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797524] [ 30.797747] The buggy address belongs to the object at ffff88800eba2570 [ 30.797747] which belongs to the cache vm_area_struct of size 168 [ 30.799214] The buggy address is located 88 bytes inside of [ 30.799214] freed 168-byte region [ffff88800eba2570, ffff88800eba2618) [ 30.800625] [ 30.800843] The buggy address belongs to the physical page: [ 30.801522] page:0000000084b145e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeba2 [ 30.802619] memcg:ffff88800ecc7e01 [ 30.803058] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.803708] page_type: 0xffffffff() [ 30.804165] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.805083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecc7e01 [ 30.806009] page dumped because: kasan: bad access detected [ 30.806669] [ 30.806888] Memory state around the buggy address: [ 30.807466] ffff88800eba2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.808327] ffff88800eba2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.809187] >ffff88800eba2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.810067] ^ [ 30.810733] ffff88800eba2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.811589] ffff88800eba2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.812453] ================================================================== [ 30.813480] Disabling lock debugging due to kernel taint [ 32.754522] BUG: Bad rss-counter state mm:0000000011232bf9 type:MM_FILEPAGES val:33 [ 32.755769] BUG: Bad rss-counter state mm:0000000011232bf9 type:MM_ANONPAGES val:22 [ 33.241085] BUG: Bad rss-counter state mm:00000000a5f51f6b type:MM_FILEPAGES val:33 [ 33.242037] BUG: Bad rss-counter state mm:00000000a5f51f6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41999' (ECDSA) to the list of known hosts. 2023/06/20 17:17:38 fuzzer started 2023/06/20 17:17:39 dialing manager at localhost:36067 2023/06/20 17:17:39 checking machine... 2023/06/20 17:17:39 checking revisions... [ 33.964437] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:17:39 testing simple program... [ 34.002055] cgroup: Unknown subsys name 'net' [ 34.038346] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:17:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002ebdf5e RCX=0000000000000000 RDX=ffff88800fe00000 RSI=ffff88800f352200 RDI=fffffffffffff000 RBP=ffff8880175efc98 RSP=ffff8880175efad0 R8 =0000000000000000 R9 =00676f6c2f766564 R10=0000000000000009 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800f352200 R14=ffff8880175efcf8 R15=dffffc0000000000 RIP=ffffffff814c0434 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 00007f85ce95a900 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=00007f85cef0f650 CR3=000000000e2c4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000010 RBX=0000000000000002 RCX=ffffffff86138976 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff8613897a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09e40 R15=ffff88806cf09a78 RIP=ffffffff81130bba RFL=00000246 [---Z-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 00007f33c4843700 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=00007f7d6c89ac90 CR3=0000000019ece000 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=60e27419c2b624827c482afc5b6da3dd XMM02=000000000011ba80ec2efd57dc4c00df XMM03=0000000000121d6857e89e18ce18dc51 XMM04=b53dd5d0aae93e8d00000000000ae988 XMM05=dfcdbad4f1609c370000000000131910 XMM06=8e91c1a8c6ceb43b0000000000130ae8 XMM07=e042d86d42eb936e0000000000121fe8 XMM08=57e89e18ce18dc51000000000011bae0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000