syzkaller login: [ 38.761648] BUG: Bad rss-counter state mm:000000001904f056 type:MM_FILEPAGES val:33 [ 38.763354] BUG: Bad rss-counter state mm:000000001904f056 type:MM_ANONPAGES val:22 [ 38.910401] ================================================================== [ 38.911254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.912228] Read of size 8 at addr ffff888018383b38 by task sshd/219 [ 38.912940] [ 38.913188] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.913995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.914926] Call Trace: [ 38.915228] [ 38.915497] dump_stack_lvl+0x91/0xf0 [ 38.915992] print_report+0xcc/0x620 [ 38.916610] ? __virt_addr_valid+0x102/0x340 [ 38.917374] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918200] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919020] kasan_report+0xbe/0xf0 [ 38.919653] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920494] vma_interval_tree_remove+0xc75/0xec0 [ 38.921351] vma_prepare+0xc54/0x11a0 [ 38.921960] __split_vma+0x5af/0x950 [ 38.922602] ? __pfx___split_vma+0x10/0x10 [ 38.923190] ? find_held_lock+0x2c/0x110 [ 38.923720] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.924278] ? lock_is_held_type+0x9f/0x120 [ 38.924819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.925429] ? mtree_range_walk+0x632/0x900 [ 38.925982] ? mas_walk+0x5c7/0x7c0 [ 38.926617] do_vmi_munmap+0x1f1/0x2b0 [ 38.927290] mmap_region+0x1f9/0x2660 [ 38.927818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.928322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.929054] ? __pfx_lock_acquire+0x10/0x10 [ 38.929599] ? __pfx_mmap_region+0x10/0x10 [ 38.930127] ? security_mmap_addr+0x7d/0xa0 [ 38.930658] ? get_unmapped_area+0x1f5/0x3f0 [ 38.931187] do_mmap+0x854/0xf00 [ 38.931651] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.932149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.932715] ksys_mmap_pgoff+0x3af/0x500 [ 38.933219] do_syscall_64+0x3f/0x90 [ 38.933707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934344] RIP: 0033:0x7f65ffa1cd82 [ 38.934801] 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 [ 38.936904] RSP: 002b:00007ffda77b8958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.937862] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65ffa1cd82 [ 38.938712] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65fee56000 [ 38.939812] RBP: 00007f65fee56000 R08: 0000000000000009 R09: 0000000000001000 [ 38.940984] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b731c5bf70 [ 38.942189] R13: 00007ffda77b8970 R14: 00007ffda77b89a0 R15: 00007ffda77b8d00 [ 38.943374] [ 38.943769] [ 38.944061] Allocated by task 212: [ 38.944636] kasan_save_stack+0x22/0x50 [ 38.945354] kasan_set_track+0x25/0x30 [ 38.946034] __kasan_slab_alloc+0x59/0x70 [ 38.946768] kmem_cache_alloc+0x16b/0x370 [ 38.947480] vm_area_dup+0x20/0x160 [ 38.948108] __split_vma+0x170/0x950 [ 38.948732] split_vma+0xc6/0x110 [ 38.949351] mprotect_fixup+0x8d2/0xb30 [ 38.949996] do_mprotect_pkey+0x87e/0xd40 [ 38.950687] __x64_sys_mprotect+0x78/0xc0 [ 38.951386] do_syscall_64+0x3f/0x90 [ 38.951984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952656] [ 38.952868] Freed by task 212: [ 38.953275] kasan_save_stack+0x22/0x50 [ 38.953784] kasan_set_track+0x25/0x30 [ 38.954266] kasan_save_free_info+0x2b/0x50 [ 38.954795] __kasan_slab_free+0x10a/0x190 [ 38.955300] kmem_cache_free+0x10d/0x4d0 [ 38.955801] rcu_core+0x8c8/0x2860 [ 38.956236] __do_softirq+0x1b7/0x7d4 [ 38.956732] [ 38.956948] Last potentially related work creation: [ 38.957546] kasan_save_stack+0x22/0x50 [ 38.958041] __kasan_record_aux_stack+0x8e/0xa0 [ 38.958614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.959243] remove_vma+0x139/0x170 [ 38.959690] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.960231] do_vmi_munmap+0x1f1/0x2b0 [ 38.960712] __vm_munmap+0x138/0x3a0 [ 38.961186] __x64_sys_munmap+0x59/0x80 [ 38.961674] do_syscall_64+0x3f/0x90 [ 38.962145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962772] [ 38.962983] The buggy address belongs to the object at ffff888018383ae0 [ 38.962983] which belongs to the cache vm_area_struct of size 168 [ 38.964504] The buggy address is located 88 bytes inside of [ 38.964504] freed 168-byte region [ffff888018383ae0, ffff888018383b88) [ 38.966089] [ 38.966364] The buggy address belongs to the physical page: [ 38.967228] page:000000001693435d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18383 [ 38.968630] memcg:ffff888013ea1101 [ 38.969187] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.970024] page_type: 0xffffffff() [ 38.970600] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.971767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ea1101 [ 38.972938] page dumped because: kasan: bad access detected [ 38.973807] [ 38.974090] Memory state around the buggy address: [ 38.974843] ffff888018383a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.975951] ffff888018383a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.976989] >ffff888018383b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.978102] ^ [ 38.978917] ffff888018383b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.980044] ffff888018383c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.981179] ================================================================== [ 38.982495] Disabling lock debugging due to kernel taint [ 40.821440] BUG: Bad rss-counter state mm:000000007a9ea261 type:MM_FILEPAGES val:33 [ 40.822320] BUG: Bad rss-counter state mm:000000007a9ea261 type:MM_ANONPAGES val:22 [ 41.237132] BUG: Bad rss-counter state mm:00000000d83fc91a type:MM_FILEPAGES val:33 [ 41.237940] BUG: Bad rss-counter state mm:00000000d83fc91a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35496' (ECDSA) to the list of known hosts. 2023/06/21 07:38:18 fuzzer started 2023/06/21 07:38:19 dialing manager at localhost:36067 2023/06/21 07:38:19 checking machine... 2023/06/21 07:38:19 checking revisions... [ 41.908871] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:38:19 testing simple program... [ 41.967590] cgroup: Unknown subsys name 'net' [ 42.027534] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:38:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f0a1166ed80 CR3=000000000d8a4000 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=dfd991659ec85495f6406cad068d4499 XMM02=ec2efd57dc4c00df000000000011af28 XMM03=ab95c478fd6a09a7000000000011aff8 XMM04=8e7d7ad2f3e4f99d00000000000ae988 XMM05=dfcdbad4f1609c370000000000131e58 XMM06=f3044fa6cf5e82e100000000001306b8 XMM07=e042d86d42eb936e0000000000121bb8 XMM08=ab95c478fd6a09a7000000000011aff8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002d13f02 RSP=ffff88801689f800 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=0000000000000dc0 RIP=ffffffff812d86f2 RFL=00000247 [---Z-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 00007f4de0cd4900 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=00007ffead9bc000 CR3=00000000182d2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000