syzkaller login: [ 31.222307] BUG: Bad rss-counter state mm:00000000b25294e6 type:MM_FILEPAGES val:33 [ 31.223138] BUG: Bad rss-counter state mm:00000000b25294e6 type:MM_ANONPAGES val:22 [ 31.408648] ================================================================== [ 31.409775] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.410905] Read of size 8 at addr ffff888019d8b5c8 by task sshd/219 [ 31.411757] [ 31.411996] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.412986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.414062] Call Trace: [ 31.414426] [ 31.414740] dump_stack_lvl+0x91/0xf0 [ 31.415287] print_report+0xcc/0x620 [ 31.415827] ? __virt_addr_valid+0x102/0x340 [ 31.416450] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.417148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.417836] kasan_report+0xbe/0xf0 [ 31.418389] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419094] vma_interval_tree_remove+0xc75/0xec0 [ 31.419798] vma_prepare+0xc54/0x11a0 [ 31.420355] __split_vma+0x5af/0x950 [ 31.420883] ? __pfx___split_vma+0x10/0x10 [ 31.421507] ? find_held_lock+0x2c/0x110 [ 31.422093] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.422735] ? lock_is_held_type+0x9f/0x120 [ 31.423354] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.424030] ? mtree_range_walk+0x632/0x900 [ 31.424678] ? mas_walk+0x5c7/0x7c0 [ 31.425221] do_vmi_munmap+0x1f1/0x2b0 [ 31.425786] mmap_region+0x1f9/0x2660 [ 31.426343] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.426911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.427714] ? __pfx_lock_acquire+0x10/0x10 [ 31.428333] ? __pfx_mmap_region+0x10/0x10 [ 31.428965] ? security_mmap_addr+0x7d/0xa0 [ 31.429588] ? get_unmapped_area+0x1f5/0x3f0 [ 31.430214] do_mmap+0x854/0xf00 [ 31.430698] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.431250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.431876] ksys_mmap_pgoff+0x3af/0x500 [ 31.432484] do_syscall_64+0x3f/0x90 [ 31.433037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.433784] RIP: 0033:0x7f5174582d82 [ 31.434317] 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 [ 31.436913] RSP: 002b:00007ffe892b1c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.437930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5174582d82 [ 31.438901] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51739bc000 [ 31.439845] RBP: 00007f51739bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.440787] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee2ada0d90 [ 31.441755] R13: 00007ffe892b1c90 R14: 00007ffe892b1cc0 R15: 00007ffe892b2020 [ 31.442737] [ 31.443071] [ 31.443326] Allocated by task 212: [ 31.443806] kasan_save_stack+0x22/0x50 [ 31.444392] kasan_set_track+0x25/0x30 [ 31.444970] __kasan_slab_alloc+0x59/0x70 [ 31.445584] kmem_cache_alloc+0x16b/0x370 [ 31.446169] vm_area_dup+0x20/0x160 [ 31.446675] __split_vma+0x170/0x950 [ 31.447212] split_vma+0xc6/0x110 [ 31.447714] mprotect_fixup+0x8d2/0xb30 [ 31.448286] do_mprotect_pkey+0x87e/0xd40 [ 31.448865] __x64_sys_mprotect+0x78/0xc0 [ 31.449476] do_syscall_64+0x3f/0x90 [ 31.450010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450736] [ 31.450982] Freed by task 212: [ 31.451425] kasan_save_stack+0x22/0x50 [ 31.451997] kasan_set_track+0x25/0x30 [ 31.452555] kasan_save_free_info+0x2b/0x50 [ 31.453159] __kasan_slab_free+0x10a/0x190 [ 31.453729] kmem_cache_free+0x10d/0x4d0 [ 31.454269] rcu_core+0x8c8/0x2860 [ 31.454744] __do_softirq+0x1b7/0x7d4 [ 31.455248] [ 31.455475] Last potentially related work creation: [ 31.456099] kasan_save_stack+0x22/0x50 [ 31.456633] __kasan_record_aux_stack+0x8e/0xa0 [ 31.457267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.457961] remove_vma+0x139/0x170 [ 31.458452] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.459069] do_vmi_munmap+0x1f1/0x2b0 [ 31.459608] __vm_munmap+0x138/0x3a0 [ 31.460133] __x64_sys_munmap+0x59/0x80 [ 31.460686] do_syscall_64+0x3f/0x90 [ 31.461219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.461933] [ 31.462171] The buggy address belongs to the object at ffff888019d8b570 [ 31.462171] which belongs to the cache vm_area_struct of size 168 [ 31.463825] The buggy address is located 88 bytes inside of [ 31.463825] freed 168-byte region [ffff888019d8b570, ffff888019d8b618) [ 31.465518] [ 31.465770] The buggy address belongs to the physical page: [ 31.466552] page:000000002cb5d31a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d8b [ 31.467849] memcg:ffff888019f86901 [ 31.468355] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.469145] page_type: 0xffffffff() [ 31.469670] raw: 0100000000000200 ffff8880087a0c80 ffffea00006760c0 000000000000000a [ 31.470768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f86901 [ 31.471839] page dumped because: kasan: bad access detected [ 31.472582] [ 31.472819] Memory state around the buggy address: [ 31.473464] ffff888019d8b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.474370] ffff888019d8b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.475300] >ffff888019d8b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.476244] ^ [ 31.476984] ffff888019d8b600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.477914] ffff888019d8b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.478823] ================================================================== [ 31.479931] Disabling lock debugging due to kernel taint [ 33.472295] BUG: Bad rss-counter state mm:00000000dff341af type:MM_FILEPAGES val:33 [ 33.473337] BUG: Bad rss-counter state mm:00000000dff341af type:MM_ANONPAGES val:22 [ 33.978259] BUG: Bad rss-counter state mm:00000000aba8c9cb type:MM_FILEPAGES val:33 [ 33.979467] BUG: Bad rss-counter state mm:00000000aba8c9cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35863' (ECDSA) to the list of known hosts. 2023/06/20 21:29:12 fuzzer started 2023/06/20 21:29:13 dialing manager at localhost:36067 2023/06/20 21:29:13 checking machine... 2023/06/20 21:29:13 checking revisions... [ 34.653443] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:29:13 testing simple program... [ 34.706949] cgroup: Unknown subsys name 'net' [ 34.748216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffc63321000 RCX=0000000000000000 RDX=ffff8880167151c0 RSI=00007ffc63321000 RDI=ffff88801a3cf9f8 RBP=ffff88801a3cf9f8 RSP=ffff88800b997ce8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000100dca R13=ffff88801a3cf9f8 R14=0000000000000000 R15=ffff88801bf5b8c8 RIP=ffffffff817f5976 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6c3b331900 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=00007ffc63321f7c CR3=000000000c5b6000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=eab922b0c714168407813d1d9dc146b7 XMM05=00000000000000000000000000000000 XMM06=737322636314163d07653d1d6873463d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f11fe9bb6c8 CR3=0000000008c64000 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=ab16b169c49678808840cc6218bfa507 XMM02=000000000011b170ec2efd57dc4c00df XMM03=00000000001222805eb8acb21635ba1e XMM04=042837ee95bad50800000000000ae988 XMM05=dfcdbad4f1609c3700000000001320f0 XMM06=cd86eb23f6f1cffa0000000000130f58 XMM07=e042d86d42eb936e0000000000122500 XMM08=5eb8acb21635ba1e000000000011b1d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000