syzkaller login: [ 30.746268] BUG: Bad rss-counter state mm:000000000bd29fc9 type:MM_FILEPAGES val:33 [ 30.747343] BUG: Bad rss-counter state mm:000000000bd29fc9 type:MM_ANONPAGES val:22 [ 30.909817] ================================================================== [ 30.910936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.912026] Read of size 8 at addr ffff888016594310 by task sshd/220 [ 30.912943] [ 30.913168] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.914064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.915084] Call Trace: [ 30.915401] [ 30.915682] dump_stack_lvl+0x91/0xf0 [ 30.916171] print_report+0xcc/0x620 [ 30.916649] ? __virt_addr_valid+0x102/0x340 [ 30.917195] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917810] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918418] kasan_report+0xbe/0xf0 [ 30.918893] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.919514] vma_interval_tree_remove+0xc75/0xec0 [ 30.920104] vma_prepare+0xc54/0x11a0 [ 30.920577] __split_vma+0x5af/0x950 [ 30.921044] ? __pfx___split_vma+0x10/0x10 [ 30.921564] ? find_held_lock+0x2c/0x110 [ 30.922098] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.922665] ? lock_is_held_type+0x9f/0x120 [ 30.923229] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.923832] ? mtree_range_walk+0x632/0x900 [ 30.924377] ? mas_walk+0x5c7/0x7c0 [ 30.924860] do_vmi_munmap+0x1f1/0x2b0 [ 30.925350] mmap_region+0x1f9/0x2660 [ 30.925829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.926335] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.927050] ? __pfx_lock_acquire+0x10/0x10 [ 30.927575] ? __pfx_mmap_region+0x10/0x10 [ 30.928112] ? security_mmap_addr+0x7d/0xa0 [ 30.928648] ? get_unmapped_area+0x1f5/0x3f0 [ 30.929194] do_mmap+0x854/0xf00 [ 30.929628] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.930125] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.930686] ksys_mmap_pgoff+0x3af/0x500 [ 30.931204] do_syscall_64+0x3f/0x90 [ 30.931690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.932335] RIP: 0033:0x7f4dd36ebd82 [ 30.932795] 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 [ 30.934915] RSP: 002b:00007ffe652c0578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.935839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4dd36ebd82 [ 30.936683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4dd2b25000 [ 30.937521] RBP: 00007f4dd2b25000 R08: 0000000000000009 R09: 0000000000001000 [ 30.938360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560cd7e5af70 [ 30.939216] R13: 00007ffe652c0590 R14: 00007ffe652c05c0 R15: 00007ffe652c0920 [ 30.940075] [ 30.940366] [ 30.940585] Allocated by task 213: [ 30.941019] kasan_save_stack+0x22/0x50 [ 30.941527] kasan_set_track+0x25/0x30 [ 30.942018] __kasan_slab_alloc+0x59/0x70 [ 30.942541] kmem_cache_alloc+0x16b/0x370 [ 30.943082] vm_area_dup+0x20/0x160 [ 30.943546] __split_vma+0x170/0x950 [ 30.944015] split_vma+0xc6/0x110 [ 30.944452] mprotect_fixup+0x8d2/0xb30 [ 30.944951] do_mprotect_pkey+0x87e/0xd40 [ 30.945469] __x64_sys_mprotect+0x78/0xc0 [ 30.945989] do_syscall_64+0x3f/0x90 [ 30.946467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.947112] [ 30.947327] Freed by task 213: [ 30.947736] kasan_save_stack+0x22/0x50 [ 30.948240] kasan_set_track+0x25/0x30 [ 30.948731] kasan_save_free_info+0x2b/0x50 [ 30.949254] __kasan_slab_free+0x10a/0x190 [ 30.949785] kmem_cache_free+0x10d/0x4d0 [ 30.950305] rcu_core+0x8c8/0x2860 [ 30.950748] __do_softirq+0x1b7/0x7d4 [ 30.951240] [ 30.951457] Last potentially related work creation: [ 30.952040] kasan_save_stack+0x22/0x50 [ 30.952540] __kasan_record_aux_stack+0x8e/0xa0 [ 30.953111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.953750] remove_vma+0x139/0x170 [ 30.954200] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.954762] do_vmi_munmap+0x1f1/0x2b0 [ 30.955263] __vm_munmap+0x138/0x3a0 [ 30.955740] __x64_sys_munmap+0x59/0x80 [ 30.956233] do_syscall_64+0x3f/0x90 [ 30.956704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957339] [ 30.957552] The buggy address belongs to the object at ffff8880165942b8 [ 30.957552] which belongs to the cache vm_area_struct of size 168 [ 30.959018] The buggy address is located 88 bytes inside of [ 30.959018] freed 168-byte region [ffff8880165942b8, ffff888016594360) [ 30.960409] [ 30.960626] The buggy address belongs to the physical page: [ 30.961280] page:000000007d10e715 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16594 [ 30.962376] memcg:ffff888016595001 [ 30.962804] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.963465] page_type: 0xffffffff() [ 30.963945] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.964857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016595001 [ 30.965759] page dumped because: kasan: bad access detected [ 30.966417] [ 30.966635] Memory state around the buggy address: [ 30.967226] ffff888016594200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.968086] ffff888016594280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.968939] >ffff888016594300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.969791] ^ [ 30.970256] ffff888016594380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.971124] ffff888016594400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.971969] ================================================================== [ 30.972933] Disabling lock debugging due to kernel taint [ 33.097010] BUG: Bad rss-counter state mm:000000006aea8e33 type:MM_FILEPAGES val:33 [ 33.097825] BUG: Bad rss-counter state mm:000000006aea8e33 type:MM_ANONPAGES val:22 [ 33.536923] BUG: Bad rss-counter state mm:0000000029657477 type:MM_FILEPAGES val:33 [ 33.537694] BUG: Bad rss-counter state mm:0000000029657477 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37367' (ECDSA) to the list of known hosts. 2023/06/21 00:26:05 fuzzer started 2023/06/21 00:26:05 dialing manager at localhost:36067 2023/06/21 00:26:05 checking machine... 2023/06/21 00:26:05 checking revisions... [ 34.174782] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:26:05 testing simple program... [ 34.230934] cgroup: Unknown subsys name 'net' [ 34.279602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:05 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=00007fd669cd1650 CR3=000000000de5c000 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=2035303a36323a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a36323a3030203132 XMM08=20303d64696720303d64697520612f6e 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=ffff888008c04400 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=00007f51dcba74d0 CR3=0000000008ec6000 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=b907678876f9a496d547e9c2dcb869f1 XMM02=0000000000119e10eff9b2d0a8fce9cb XMM03=0000000000119ee02c67c8bc2e329bc3 XMM04=c4661efb5c46ab6900000000000ae988 XMM05=f170742d97ae0d920000000000131fd0 XMM06=4fda316b135da52b0000000000131070 XMM07=e042d86d42eb936e0000000000121370 XMM08=d75fea63eda4c08c0000000000119ee0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000