syzkaller login: [ 32.739572] BUG: Bad rss-counter state mm:00000000759987aa type:MM_FILEPAGES val:33 [ 32.740639] BUG: Bad rss-counter state mm:00000000759987aa type:MM_ANONPAGES val:22 [ 32.779960] ================================================================== [ 32.780979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.781919] Read of size 8 at addr ffff88801589d058 by task sshd/221 [ 32.782692] [ 32.782910] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.783775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.784762] Call Trace: [ 32.785082] [ 32.785369] dump_stack_lvl+0x91/0xf0 [ 32.785862] print_report+0xcc/0x620 [ 32.786347] ? __virt_addr_valid+0x102/0x340 [ 32.786907] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.787524] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.788140] kasan_report+0xbe/0xf0 [ 32.788624] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.789240] vma_interval_tree_remove+0xc75/0xec0 [ 32.789841] vma_prepare+0xc54/0x11a0 [ 32.790334] __split_vma+0x5af/0x950 [ 32.790809] ? __pfx___split_vma+0x10/0x10 [ 32.791343] ? find_held_lock+0x2c/0x110 [ 32.791869] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.792457] ? lock_is_held_type+0x9f/0x120 [ 32.792995] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.793599] ? mtree_range_walk+0x632/0x900 [ 32.794156] ? mas_walk+0x5c7/0x7c0 [ 32.794635] do_vmi_munmap+0x1f1/0x2b0 [ 32.795143] mmap_region+0x1f9/0x2660 [ 32.795625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.796140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.796873] ? __pfx_lock_acquire+0x10/0x10 [ 32.797419] ? __pfx_mmap_region+0x10/0x10 [ 32.797963] ? security_mmap_addr+0x7d/0xa0 [ 32.798493] ? get_unmapped_area+0x1f5/0x3f0 [ 32.799051] do_mmap+0x854/0xf00 [ 32.799497] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.799992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.800579] ksys_mmap_pgoff+0x3af/0x500 [ 32.801089] do_syscall_64+0x3f/0x90 [ 32.801572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.802227] RIP: 0033:0x7f7e9924cd82 [ 32.802685] 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 [ 32.804855] RSP: 002b:00007fff468701f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.805764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e9924cd82 [ 32.806615] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e98686000 [ 32.807654] RBP: 00007f7e98686000 R08: 0000000000000009 R09: 0000000000001000 [ 32.808528] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562785b3ed90 [ 32.809398] R13: 00007fff46870210 R14: 00007fff46870240 R15: 00007fff468705a0 [ 32.810251] [ 32.810542] [ 32.810762] Allocated by task 214: [ 32.811191] kasan_save_stack+0x22/0x50 [ 32.811698] kasan_set_track+0x25/0x30 [ 32.812192] __kasan_slab_alloc+0x59/0x70 [ 32.812728] kmem_cache_alloc+0x16b/0x370 [ 32.813250] vm_area_dup+0x20/0x160 [ 32.813715] __split_vma+0x170/0x950 [ 32.814188] split_vma+0xc6/0x110 [ 32.814633] mprotect_fixup+0x8d2/0xb30 [ 32.815143] do_mprotect_pkey+0x87e/0xd40 [ 32.815680] __x64_sys_mprotect+0x78/0xc0 [ 32.816209] do_syscall_64+0x3f/0x90 [ 32.816708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.817359] [ 32.817575] Freed by task 204: [ 32.817971] kasan_save_stack+0x22/0x50 [ 32.818488] kasan_set_track+0x25/0x30 [ 32.818995] kasan_save_free_info+0x2b/0x50 [ 32.819539] __kasan_slab_free+0x10a/0x190 [ 32.820088] kmem_cache_free+0x10d/0x4d0 [ 32.820617] rcu_core+0x8c8/0x2860 [ 32.821080] __do_softirq+0x1b7/0x7d4 [ 32.821563] [ 32.821788] Last potentially related work creation: [ 32.822385] kasan_save_stack+0x22/0x50 [ 32.822894] __kasan_record_aux_stack+0x8e/0xa0 [ 32.823483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.824145] remove_vma+0x139/0x170 [ 32.824614] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.825172] do_vmi_munmap+0x1f1/0x2b0 [ 32.825666] __vm_munmap+0x138/0x3a0 [ 32.826142] __x64_sys_munmap+0x59/0x80 [ 32.826648] do_syscall_64+0x3f/0x90 [ 32.827139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.827804] [ 32.828026] The buggy address belongs to the object at ffff88801589d000 [ 32.828026] which belongs to the cache vm_area_struct of size 168 [ 32.829538] The buggy address is located 88 bytes inside of [ 32.829538] freed 168-byte region [ffff88801589d000, ffff88801589d0a8) [ 32.830995] [ 32.831215] The buggy address belongs to the physical page: [ 32.831903] page:00000000c6c5b4fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1589d [ 32.833023] memcg:ffff88800ff90801 [ 32.833451] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.834111] page_type: 0xffffffff() [ 32.834568] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.835499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff90801 [ 32.836441] page dumped because: kasan: bad access detected [ 32.837114] [ 32.837337] Memory state around the buggy address: [ 32.837936] ffff88801589cf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.838819] ffff88801589cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.839691] >ffff88801589d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.840558] ^ [ 32.841312] ffff88801589d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.842183] ffff88801589d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.843060] ================================================================== [ 32.844156] Disabling lock debugging due to kernel taint [ 34.971114] BUG: Bad rss-counter state mm:00000000f22036ae type:MM_FILEPAGES val:33 [ 34.972315] BUG: Bad rss-counter state mm:00000000f22036ae type:MM_ANONPAGES val:22 [ 35.363794] BUG: Bad rss-counter state mm:00000000bb93eff0 type:MM_FILEPAGES val:33 [ 35.365015] BUG: Bad rss-counter state mm:00000000bb93eff0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61157' (ECDSA) to the list of known hosts. 2023/06/19 16:49:46 fuzzer started 2023/06/19 16:49:47 dialing manager at localhost:44161 2023/06/19 16:49:47 checking machine... 2023/06/19 16:49:47 checking revisions... [ 36.066949] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:49:47 testing simple program... [ 36.122380] cgroup: Unknown subsys name 'net' [ 36.177377] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:49:45 Registers: info registers vcpu 0 RAX=1ffff1100127f169 RBX=ffff8880093f8b18 RCX=1ffff11001d40ad2 RDX=dffffc0000000000 RSI=ffff88800e53dd50 RDI=ffff8880093f8b48 RBP=ffff88800ea05660 RSP=ffff88801678fa28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e53db80 R13=0000000000000000 R14=ffff888019bd2178 R15=ffff888019bd2130 RIP=ffffffff818474fe 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 00007f8879a3c900 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=00007ffd1bad7000 CR3=0000000009692000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=ffffffff86137d01 RDX=1ffff1100d9e137d RSI=ffffffff8180c8da RDI=ffff88806cf09b6c RBP=ffff88806cf09be8 RSP=ffff88806cf09a78 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800d87e540 RIP=ffffffff813ad4f7 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 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=00007fcbfb7e5ca0 CR3=000000000c7c8000 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=39343a3631203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303834 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000