syzkaller login: [ 30.596765] BUG: Bad rss-counter state mm:00000000fabd8d32 type:MM_FILEPAGES val:33 [ 30.598279] BUG: Bad rss-counter state mm:00000000fabd8d32 type:MM_ANONPAGES val:22 [ 30.769660] ================================================================== [ 30.770591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.771542] Read of size 8 at addr ffff88800da98df0 by task sshd/219 [ 30.772416] [ 30.772635] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.773515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.774488] Call Trace: [ 30.774807] [ 30.775088] dump_stack_lvl+0x91/0xf0 [ 30.775577] print_report+0xcc/0x620 [ 30.776075] ? __virt_addr_valid+0x102/0x340 [ 30.776622] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777247] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777871] kasan_report+0xbe/0xf0 [ 30.778351] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778971] vma_interval_tree_remove+0xc75/0xec0 [ 30.779573] vma_prepare+0xc54/0x11a0 [ 30.780094] __split_vma+0x5af/0x950 [ 30.780597] ? __pfx___split_vma+0x10/0x10 [ 30.781168] ? find_held_lock+0x2c/0x110 [ 30.781725] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782327] ? lock_is_held_type+0x9f/0x120 [ 30.782897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.783544] ? mtree_range_walk+0x632/0x900 [ 30.784146] ? mas_walk+0x5c7/0x7c0 [ 30.784645] do_vmi_munmap+0x1f1/0x2b0 [ 30.785177] mmap_region+0x1f9/0x2660 [ 30.785692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.786234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.786993] ? __pfx_lock_acquire+0x10/0x10 [ 30.787567] ? __pfx_mmap_region+0x10/0x10 [ 30.788150] ? security_mmap_addr+0x7d/0xa0 [ 30.788720] ? get_unmapped_area+0x1f5/0x3f0 [ 30.789293] do_mmap+0x854/0xf00 [ 30.789769] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.790295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.790894] ksys_mmap_pgoff+0x3af/0x500 [ 30.791423] do_syscall_64+0x3f/0x90 [ 30.791933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792623] RIP: 0033:0x7ff45c245d82 [ 30.793107] 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 [ 30.795379] RSP: 002b:00007ffd1e93de18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.796358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff45c245d82 [ 30.797272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff45b67f000 [ 30.798171] RBP: 00007ff45b67f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799068] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab6d130ec0 [ 30.799983] R13: 00007ffd1e93de30 R14: 00007ffd1e93de60 R15: 00007ffd1e93e1c0 [ 30.800912] [ 30.801228] [ 30.801450] Allocated by task 212: [ 30.801906] kasan_save_stack+0x22/0x50 [ 30.802430] kasan_set_track+0x25/0x30 [ 30.802943] __kasan_slab_alloc+0x59/0x70 [ 30.803472] kmem_cache_alloc+0x16b/0x370 [ 30.803996] vm_area_dup+0x20/0x160 [ 30.804451] __split_vma+0x170/0x950 [ 30.804920] split_vma+0xc6/0x110 [ 30.805361] mprotect_fixup+0x8d2/0xb30 [ 30.805864] do_mprotect_pkey+0x87e/0xd40 [ 30.806382] __x64_sys_mprotect+0x78/0xc0 [ 30.806903] do_syscall_64+0x3f/0x90 [ 30.807378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808047] [ 30.808263] Freed by task 212: [ 30.808656] kasan_save_stack+0x22/0x50 [ 30.809163] kasan_set_track+0x25/0x30 [ 30.809652] kasan_save_free_info+0x2b/0x50 [ 30.810186] __kasan_slab_free+0x10a/0x190 [ 30.810718] kmem_cache_free+0x10d/0x4d0 [ 30.811224] rcu_core+0x8c8/0x2860 [ 30.811668] __do_softirq+0x1b7/0x7d4 [ 30.812156] [ 30.812370] Last potentially related work creation: [ 30.812970] kasan_save_stack+0x22/0x50 [ 30.813469] __kasan_record_aux_stack+0x8e/0xa0 [ 30.814062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.814721] remove_vma+0x139/0x170 [ 30.815182] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.815745] do_vmi_munmap+0x1f1/0x2b0 [ 30.816250] __vm_munmap+0x138/0x3a0 [ 30.816716] __x64_sys_munmap+0x59/0x80 [ 30.817213] do_syscall_64+0x3f/0x90 [ 30.817691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818333] [ 30.818547] Second to last potentially related work creation: [ 30.819234] kasan_save_stack+0x22/0x50 [ 30.819734] __kasan_record_aux_stack+0x8e/0xa0 [ 30.820312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820946] remove_vma+0x139/0x170 [ 30.821395] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821949] do_vmi_munmap+0x1f1/0x2b0 [ 30.822436] mmap_region+0x1f9/0x2660 [ 30.822912] do_mmap+0x854/0xf00 [ 30.823343] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.823828] ksys_mmap_pgoff+0x3af/0x500 [ 30.824358] do_syscall_64+0x3f/0x90 [ 30.824833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825477] [ 30.825693] The buggy address belongs to the object at ffff88800da98d98 [ 30.825693] which belongs to the cache vm_area_struct of size 168 [ 30.827155] The buggy address is located 88 bytes inside of [ 30.827155] freed 168-byte region [ffff88800da98d98, ffff88800da98e40) [ 30.828567] [ 30.828772] The buggy address belongs to the physical page: [ 30.829429] page:00000000a317db44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda98 [ 30.830508] memcg:ffff88800d99ba01 [ 30.830936] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.831583] page_type: 0xffffffff() [ 30.832045] raw: 0100000000000200 ffff8880087a0c80 ffffea000036f5c0 dead000000000002 [ 30.832965] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d99ba01 [ 30.833866] page dumped because: kasan: bad access detected [ 30.834533] [ 30.834758] Memory state around the buggy address: [ 30.835349] ffff88800da98c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.836234] ffff88800da98d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.837098] >ffff88800da98d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.837962] ^ [ 30.838784] ffff88800da98e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.839654] ffff88800da98e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.840543] ================================================================== [ 30.841666] Disabling lock debugging due to kernel taint [ 32.919301] BUG: Bad rss-counter state mm:00000000beba74bb type:MM_FILEPAGES val:33 [ 32.920066] BUG: Bad rss-counter state mm:00000000beba74bb type:MM_ANONPAGES val:22 [ 33.400348] BUG: Bad rss-counter state mm:0000000084baa6fc type:MM_FILEPAGES val:33 [ 33.401543] BUG: Bad rss-counter state mm:0000000084baa6fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19437' (ECDSA) to the list of known hosts. 2023/06/20 13:40:43 fuzzer started 2023/06/20 13:40:43 dialing manager at localhost:36067 2023/06/20 13:40:43 checking machine... 2023/06/20 13:40:43 checking revisions... [ 34.109277] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:40:44 testing simple program... [ 34.158824] cgroup: Unknown subsys name 'net' [ 34.195670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:43 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=00007f656d8dc370 CR3=000000000cc10000 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=dded2e6cfc285c956e45e2624841ec6e XMM02=eff9b2d0a8fce9cb0000000000119d10 XMM03=2c67c8bc2e329bc30000000000119e38 XMM04=2dba0cdb8c51480800000000000ae988 XMM05=b775b9520aa34d3e0000000000133648 XMM06=f784237cd8b8533800000000001323e8 XMM07=fb795ef6d65770560000000000121378 XMM08=2c67c8bc2e329bc30000000000119e38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000039500 RCX=0000000000000000 RDX=1ffff1100d9e73db RSI=ffffffff813bcfd9 RDI=ffff88806cf39ed8 RBP=ffff88806cf09dc8 RSP=ffff88806cf09d80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=ffff88806cf39500 R13=0000000000000001 R14=0000000000000001 R15=ffff888009bc8000 RIP=ffffffff810cb5a4 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 00007f96f5088900 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=00007ffe7f0f1000 CR3=0000000018754000 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=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