syzkaller login: [ 30.861547] BUG: Bad rss-counter state mm:00000000845dd6c1 type:MM_FILEPAGES val:33 [ 30.862735] BUG: Bad rss-counter state mm:00000000845dd6c1 type:MM_ANONPAGES val:22 [ 30.894688] ================================================================== [ 30.895378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.896099] Read of size 8 at addr ffff88800a33e310 by task sshd/220 [ 30.896671] [ 30.896833] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.897477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.898206] Call Trace: [ 30.898448] [ 30.898665] dump_stack_lvl+0x91/0xf0 [ 30.899045] print_report+0xcc/0x620 [ 30.899410] ? __virt_addr_valid+0x102/0x340 [ 30.899829] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.900293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.900758] kasan_report+0xbe/0xf0 [ 30.901121] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.901592] vma_interval_tree_remove+0xc75/0xec0 [ 30.902047] vma_prepare+0xc54/0x11a0 [ 30.902404] __split_vma+0x5af/0x950 [ 30.902760] ? __pfx___split_vma+0x10/0x10 [ 30.903162] ? find_held_lock+0x2c/0x110 [ 30.903550] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.903996] ? lock_is_held_type+0x9f/0x120 [ 30.904393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.904795] ? mtree_range_walk+0x632/0x900 [ 30.905121] ? mas_walk+0x5c7/0x7c0 [ 30.905401] do_vmi_munmap+0x1f1/0x2b0 [ 30.905690] mmap_region+0x1f9/0x2660 [ 30.905972] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.906276] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.906696] ? __pfx_lock_acquire+0x10/0x10 [ 30.907098] ? __pfx_mmap_region+0x10/0x10 [ 30.907408] ? security_mmap_addr+0x7d/0xa0 [ 30.907728] ? get_unmapped_area+0x1f5/0x3f0 [ 30.908049] do_mmap+0x854/0xf00 [ 30.908304] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.908594] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.908928] ksys_mmap_pgoff+0x3af/0x500 [ 30.909246] do_syscall_64+0x3f/0x90 [ 30.909530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909914] RIP: 0033:0x7f79ed146d82 [ 30.910185] 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 [ 30.911452] RSP: 002b:00007ffc6c95aea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.912005] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79ed146d82 [ 30.912499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79ec580000 [ 30.913000] RBP: 00007f79ec580000 R08: 0000000000000009 R09: 0000000000001000 [ 30.913503] R10: 0000000000000812 R11: 0000000000000206 R12: 000055888bdfcec0 [ 30.913998] R13: 00007ffc6c95aec0 R14: 00007ffc6c95aef0 R15: 00007ffc6c95b250 [ 30.914505] [ 30.914676] [ 30.914801] Allocated by task 213: [ 30.915055] kasan_save_stack+0x22/0x50 [ 30.915350] kasan_set_track+0x25/0x30 [ 30.915650] __kasan_slab_alloc+0x59/0x70 [ 30.915963] kmem_cache_alloc+0x16b/0x370 [ 30.916313] vm_area_dup+0x20/0x160 [ 30.916642] __split_vma+0x170/0x950 [ 30.916982] split_vma+0xc6/0x110 [ 30.917302] mprotect_fixup+0x8d2/0xb30 [ 30.917663] do_mprotect_pkey+0x87e/0xd40 [ 30.918040] __x64_sys_mprotect+0x78/0xc0 [ 30.918416] do_syscall_64+0x3f/0x90 [ 30.918725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919107] [ 30.919235] Freed by task 213: [ 30.919466] kasan_save_stack+0x22/0x50 [ 30.919768] kasan_set_track+0x25/0x30 [ 30.920063] kasan_save_free_info+0x2b/0x50 [ 30.920375] __kasan_slab_free+0x10a/0x190 [ 30.920690] kmem_cache_free+0x10d/0x4d0 [ 30.920989] rcu_core+0x8c8/0x2860 [ 30.921252] __do_softirq+0x1b7/0x7d4 [ 30.921533] [ 30.921660] Last potentially related work creation: [ 30.922005] kasan_save_stack+0x22/0x50 [ 30.922301] __kasan_record_aux_stack+0x8e/0xa0 [ 30.922637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.923013] remove_vma+0x139/0x170 [ 30.923277] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923618] do_vmi_munmap+0x1f1/0x2b0 [ 30.923908] __vm_munmap+0x138/0x3a0 [ 30.924184] __x64_sys_munmap+0x59/0x80 [ 30.924479] do_syscall_64+0x3f/0x90 [ 30.924766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925144] [ 30.925268] The buggy address belongs to the object at ffff88800a33e2b8 [ 30.925268] which belongs to the cache vm_area_struct of size 168 [ 30.926127] The buggy address is located 88 bytes inside of [ 30.926127] freed 168-byte region [ffff88800a33e2b8, ffff88800a33e360) [ 30.926946] [ 30.927072] The buggy address belongs to the physical page: [ 30.927509] page:00000000875f9ec2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa33e [ 30.928337] memcg:ffff888014549401 [ 30.928665] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.929148] page_type: 0xffffffff() [ 30.929490] raw: 0100000000000200 ffff8880087a0c80 ffffea00003776c0 dead000000000006 [ 30.930170] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014549401 [ 30.930707] page dumped because: kasan: bad access detected [ 30.931104] [ 30.931237] Memory state around the buggy address: [ 30.931596] ffff88800a33e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.932115] ffff88800a33e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.932619] >ffff88800a33e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.933108] ^ [ 30.933377] ffff88800a33e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.933879] ffff88800a33e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.934377] ================================================================== [ 30.935221] Disabling lock debugging due to kernel taint [ 33.254755] BUG: Bad rss-counter state mm:000000007ae133be type:MM_FILEPAGES val:33 [ 33.255972] BUG: Bad rss-counter state mm:000000007ae133be type:MM_ANONPAGES val:22 [ 33.646237] BUG: Bad rss-counter state mm:000000001cd28433 type:MM_FILEPAGES val:33 [ 33.647184] BUG: Bad rss-counter state mm:000000001cd28433 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12293' (ECDSA) to the list of known hosts. 2023/06/20 13:54:32 fuzzer started 2023/06/20 13:54:33 dialing manager at localhost:36067 2023/06/20 13:54:33 checking machine... 2023/06/20 13:54:33 checking revisions... [ 34.337972] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:54:33 testing simple program... [ 34.396839] cgroup: Unknown subsys name 'net' [ 34.429259] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:54:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880158277f8 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83635bd7 RDI=ffff888015827804 RBP=0000000000000007 RSP=ffff888015827710 R8 =0000000000000001 R9 =ffff888015827770 R10=0000000000038001 R11=0000000000091af2 R12=ffff8880158277f8 R13=0000000000000000 R14=ffff88801627d1c0 R15=0000000000000000 RIP=ffffffff813ad506 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 00007f9d568bc900 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=00007fff19ac2000 CR3=000000000ed50000 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=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=00007fb354eb86b0 CR3=000000000e71a000 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=2032333a34353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000