syzkaller login: [ 30.383497] BUG: Bad rss-counter state mm:000000005b2a65c5 type:MM_FILEPAGES val:33 [ 30.384694] BUG: Bad rss-counter state mm:000000005b2a65c5 type:MM_ANONPAGES val:22 [ 30.564177] ================================================================== [ 30.565100] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.566024] Read of size 8 at addr ffff88800d8f5ed8 by task sshd/219 [ 30.566795] [ 30.567010] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.568034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.569018] Call Trace: [ 30.569334] [ 30.569618] dump_stack_lvl+0x91/0xf0 [ 30.570127] print_report+0xcc/0x620 [ 30.570610] ? __virt_addr_valid+0x102/0x340 [ 30.571158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.571766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.572404] kasan_report+0xbe/0xf0 [ 30.572880] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.573503] vma_interval_tree_remove+0xc75/0xec0 [ 30.574095] vma_prepare+0xc54/0x11a0 [ 30.574577] __split_vma+0x5af/0x950 [ 30.575046] ? __pfx___split_vma+0x10/0x10 [ 30.575569] ? find_held_lock+0x2c/0x110 [ 30.576106] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.576662] ? lock_is_held_type+0x9f/0x120 [ 30.577212] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.577809] ? mtree_range_walk+0x632/0x900 [ 30.578361] ? mas_walk+0x5c7/0x7c0 [ 30.578835] do_vmi_munmap+0x1f1/0x2b0 [ 30.579326] mmap_region+0x1f9/0x2660 [ 30.579805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.580326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.581037] ? __pfx_lock_acquire+0x10/0x10 [ 30.581575] ? __pfx_mmap_region+0x10/0x10 [ 30.582105] ? security_mmap_addr+0x7d/0xa0 [ 30.582650] ? get_unmapped_area+0x1f5/0x3f0 [ 30.583208] do_mmap+0x854/0xf00 [ 30.583643] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.584161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.584721] ksys_mmap_pgoff+0x3af/0x500 [ 30.585225] do_syscall_64+0x3f/0x90 [ 30.585706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.586360] RIP: 0033:0x7f08340afd82 [ 30.586817] 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 [ 30.588963] RSP: 002b:00007ffd48c67e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.589866] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08340afd82 [ 30.590724] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08334e9000 [ 30.591575] RBP: 00007f08334e9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.592434] R10: 0000000000000812 R11: 0000000000000206 R12: 000056164816db20 [ 30.593277] R13: 00007ffd48c67ea0 R14: 00007ffd48c67ed0 R15: 00007ffd48c68230 [ 30.594131] [ 30.594421] [ 30.594640] Allocated by task 212: [ 30.595082] kasan_save_stack+0x22/0x50 [ 30.595590] kasan_set_track+0x25/0x30 [ 30.596098] __kasan_slab_alloc+0x59/0x70 [ 30.596616] kmem_cache_alloc+0x16b/0x370 [ 30.597128] vm_area_dup+0x20/0x160 [ 30.597585] __split_vma+0x170/0x950 [ 30.598050] split_vma+0xc6/0x110 [ 30.598491] mprotect_fixup+0x8d2/0xb30 [ 30.598991] do_mprotect_pkey+0x87e/0xd40 [ 30.599523] __x64_sys_mprotect+0x78/0xc0 [ 30.600060] do_syscall_64+0x3f/0x90 [ 30.600540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.601178] [ 30.601391] Freed by task 212: [ 30.601780] kasan_save_stack+0x22/0x50 [ 30.602280] kasan_set_track+0x25/0x30 [ 30.602771] kasan_save_free_info+0x2b/0x50 [ 30.603313] __kasan_slab_free+0x10a/0x190 [ 30.603842] kmem_cache_free+0x10d/0x4d0 [ 30.604364] rcu_core+0x8c8/0x2860 [ 30.604824] __do_softirq+0x1b7/0x7d4 [ 30.605310] [ 30.605528] Last potentially related work creation: [ 30.606106] kasan_save_stack+0x22/0x50 [ 30.606611] __kasan_record_aux_stack+0x8e/0xa0 [ 30.607181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.607818] remove_vma+0x139/0x170 [ 30.608274] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.608896] do_vmi_munmap+0x1f1/0x2b0 [ 30.609380] __vm_munmap+0x138/0x3a0 [ 30.609849] __x64_sys_munmap+0x59/0x80 [ 30.610344] do_syscall_64+0x3f/0x90 [ 30.610818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.611459] [ 30.611673] The buggy address belongs to the object at ffff88800d8f5e80 [ 30.611673] which belongs to the cache vm_area_struct of size 168 [ 30.613160] The buggy address is located 88 bytes inside of [ 30.613160] freed 168-byte region [ffff88800d8f5e80, ffff88800d8f5f28) [ 30.614561] [ 30.614775] The buggy address belongs to the physical page: [ 30.615430] page:000000001ae35e6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8f5 [ 30.616518] memcg:ffff8880166c2d01 [ 30.616946] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.617587] page_type: 0xffffffff() [ 30.618034] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.618955] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166c2d01 [ 30.619857] page dumped because: kasan: bad access detected [ 30.620522] [ 30.620738] Memory state around the buggy address: [ 30.621313] ffff88800d8f5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.622168] ffff88800d8f5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.623023] >ffff88800d8f5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.623866] ^ [ 30.624603] ffff88800d8f5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.625468] ffff88800d8f5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.626313] ================================================================== [ 30.627390] Disabling lock debugging due to kernel taint [ 32.769802] BUG: Bad rss-counter state mm:000000009314b8a4 type:MM_FILEPAGES val:33 [ 32.770966] BUG: Bad rss-counter state mm:000000009314b8a4 type:MM_ANONPAGES val:22 [ 33.172381] BUG: Bad rss-counter state mm:00000000e04e8531 type:MM_FILEPAGES val:33 [ 33.173359] BUG: Bad rss-counter state mm:00000000e04e8531 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56664' (ECDSA) to the list of known hosts. 2023/06/20 18:05:30 fuzzer started 2023/06/20 18:05:30 dialing manager at localhost:36067 2023/06/20 18:05:30 checking machine... 2023/06/20 18:05:30 checking revisions... [ 33.880193] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:05:30 testing simple program... [ 33.926484] cgroup: Unknown subsys name 'net' [ 33.978314] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:05:30 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135e RSI=ffff88806ce09b30 RDI=ffffffff813ad720 RBP=ffff88806ce09af0 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e237670 RIP=ffffffff811303b9 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 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=00007ffe3347e528 CR3=0000000019400000 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=2039323a35303a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a35303a3831203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000030 RCX=ffffffff8369e81f RDX=ffff88800fdfd1c0 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000000000 RSP=ffff88801465f890 R8 =0000000000000006 R9 =0000000000000030 R10=000000000000001c R11=0000000000000001 R12=000000000000001c R13=ffff88801465fb80 R14=ffff88801465fba0 R15=ffff88801465fa70 RIP=ffffffff814c0261 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 00007fc5396d7900 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=00007f386a846650 CR3=000000000d6b4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f6e432ab20dad32000000000000ae988 XMM05=6b3c9af8b8d4f4ac00000000001328c8 XMM06=4fda316b135da52b00000000001316b8 XMM07=fb795ef6d65770560000000000121950 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000