syzkaller login: [ 38.814115] BUG: Bad rss-counter state mm:00000000535a3913 type:MM_FILEPAGES val:33 [ 38.815309] BUG: Bad rss-counter state mm:00000000535a3913 type:MM_ANONPAGES val:22 [ 38.865772] ================================================================== [ 38.866658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.867426] Read of size 8 at addr ffff88800ed884e0 by task sshd/219 [ 38.868074] [ 38.868257] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.868978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.869738] Call Trace: [ 38.870073] [ 38.870342] dump_stack_lvl+0x91/0xf0 [ 38.870714] print_report+0xcc/0x620 [ 38.871089] ? __virt_addr_valid+0x102/0x340 [ 38.871538] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872014] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872497] kasan_report+0xbe/0xf0 [ 38.872889] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873381] vma_interval_tree_remove+0xc75/0xec0 [ 38.873846] vma_prepare+0xc54/0x11a0 [ 38.874215] __split_vma+0x5af/0x950 [ 38.874577] ? __pfx___split_vma+0x10/0x10 [ 38.874979] ? find_held_lock+0x2c/0x110 [ 38.875402] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.875844] ? lock_is_held_type+0x9f/0x120 [ 38.876280] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.876762] ? mtree_range_walk+0x632/0x900 [ 38.877186] ? mas_walk+0x5c7/0x7c0 [ 38.877562] do_vmi_munmap+0x1f1/0x2b0 [ 38.877939] mmap_region+0x1f9/0x2660 [ 38.878322] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.878718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.879288] ? __pfx_lock_acquire+0x10/0x10 [ 38.879704] ? __pfx_mmap_region+0x10/0x10 [ 38.880113] ? security_mmap_addr+0x7d/0xa0 [ 38.880530] ? get_unmapped_area+0x1f5/0x3f0 [ 38.880968] do_mmap+0x854/0xf00 [ 38.881237] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.881533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.881865] ksys_mmap_pgoff+0x3af/0x500 [ 38.882171] do_syscall_64+0x3f/0x90 [ 38.882460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.882843] RIP: 0033:0x7f24509cfd82 [ 38.883121] 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 [ 38.884436] RSP: 002b:00007fff69631118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.884996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24509cfd82 [ 38.885517] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f244fe09000 [ 38.886019] RBP: 00007f244fe09000 R08: 0000000000000009 R09: 0000000000001000 [ 38.886522] R10: 0000000000000812 R11: 0000000000000206 R12: 000055759c7fcb20 [ 38.887039] R13: 00007fff69631130 R14: 00007fff69631160 R15: 00007fff696314c0 [ 38.887560] [ 38.887733] [ 38.887864] Allocated by task 212: [ 38.888122] kasan_save_stack+0x22/0x50 [ 38.888438] kasan_set_track+0x25/0x30 [ 38.888749] __kasan_slab_alloc+0x59/0x70 [ 38.889058] kmem_cache_alloc+0x16b/0x370 [ 38.889373] vm_area_dup+0x20/0x160 [ 38.889649] __split_vma+0x170/0x950 [ 38.889930] split_vma+0xc6/0x110 [ 38.890190] mprotect_fixup+0x8d2/0xb30 [ 38.890494] do_mprotect_pkey+0x87e/0xd40 [ 38.890802] __x64_sys_mprotect+0x78/0xc0 [ 38.891112] do_syscall_64+0x3f/0x90 [ 38.891400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891781] [ 38.891908] Freed by task 13: [ 38.892145] kasan_save_stack+0x22/0x50 [ 38.892460] kasan_set_track+0x25/0x30 [ 38.892760] kasan_save_free_info+0x2b/0x50 [ 38.893076] __kasan_slab_free+0x10a/0x190 [ 38.893403] kmem_cache_free+0x10d/0x4d0 [ 38.893701] rcu_core+0x8c8/0x2860 [ 38.893963] __do_softirq+0x1b7/0x7d4 [ 38.894255] [ 38.894380] Last potentially related work creation: [ 38.894719] kasan_save_stack+0x22/0x50 [ 38.895023] __kasan_record_aux_stack+0x8e/0xa0 [ 38.895378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.895762] remove_vma+0x139/0x170 [ 38.896028] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.896364] do_vmi_munmap+0x1f1/0x2b0 [ 38.896659] __vm_munmap+0x138/0x3a0 [ 38.896935] __x64_sys_munmap+0x59/0x80 [ 38.897240] do_syscall_64+0x3f/0x90 [ 38.897533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897911] [ 38.898037] The buggy address belongs to the object at ffff88800ed88488 [ 38.898037] which belongs to the cache vm_area_struct of size 168 [ 38.898931] The buggy address is located 88 bytes inside of [ 38.898931] freed 168-byte region [ffff88800ed88488, ffff88800ed88530) [ 38.899779] [ 38.899906] The buggy address belongs to the physical page: [ 38.900310] page:000000007f8af4b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed88 [ 38.900973] memcg:ffff88800edf6601 [ 38.901229] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.901662] page_type: 0xffffffff() [ 38.901928] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4c80 dead000000000003 [ 38.902480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf6601 [ 38.903030] page dumped because: kasan: bad access detected [ 38.903434] [ 38.903563] Memory state around the buggy address: [ 38.903913] ffff88800ed88380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.904432] ffff88800ed88400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.904957] >ffff88800ed88480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.905484] ^ [ 38.905942] ffff88800ed88500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.906463] ffff88800ed88580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.906979] ================================================================== [ 38.907602] Disabling lock debugging due to kernel taint [ 40.700481] BUG: Bad rss-counter state mm:00000000d1b1c14f type:MM_FILEPAGES val:33 [ 40.701272] BUG: Bad rss-counter state mm:00000000d1b1c14f type:MM_ANONPAGES val:22 [ 41.106902] BUG: Bad rss-counter state mm:00000000232be4a9 type:MM_FILEPAGES val:33 [ 41.108050] BUG: Bad rss-counter state mm:00000000232be4a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54445' (ECDSA) to the list of known hosts. 2023/06/20 22:37:15 fuzzer started 2023/06/20 22:37:15 dialing manager at localhost:36067 2023/06/20 22:37:15 checking machine... 2023/06/20 22:37:15 checking revisions... [ 41.740229] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:37:15 testing simple program... [ 41.789786] cgroup: Unknown subsys name 'net' [ 41.837621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:37:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86098092 RDX=ffff88806ce09ae0 RSI=1ffff1100d9c135e RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86098096 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a98 R15=ffff88806ce09a98 RIP=ffffffff811310a7 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 00007f683db87900 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=00007f683cff95a0 CR3=0000000010288000 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=7786ff9bab35cdb2ad41a8bae1fc627d XMM02=000000000011a408d59e07bde36eea69 XMM03=000000000011a530ec2efd57dc4c00df XMM04=ee3c55c43a2ac1f800000000000ae988 XMM05=d700a557d9a0df990000000000132098 XMM06=e4cb8bb95a7664b60000000000130e90 XMM07=fb795ef6d657705600000000001212d8 XMM08=2c67c8bc2e329bc3000000000011a530 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015ab51c0 RBX=ffff888009820e40 RCX=ffffffff812e0473 RDX=1ffff110013041ca RSI=0000000000000004 RDI=ffff888009820e40 RBP=ffff888009820e40 RSP=ffff88800fe37880 R8 =0000000000000000 R9 =ffffed10013041c8 R10=ffff888009820e43 R11=00030009ff02000a R12=ffff888009820e50 R13=ffff888009820e80 R14=ffffffff8367562f R15=00000000000000a4 RIP=ffffffff812e04d3 RFL=00000046 [---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 00007f64fd50e900 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=00007ffe8f617000 CR3=000000000e408000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000