syzkaller login: [ 59.587355] BUG: Bad rss-counter state mm:00000000f65801a9 type:MM_FILEPAGES val:33 [ 59.588494] BUG: Bad rss-counter state mm:00000000f65801a9 type:MM_ANONPAGES val:22 [ 59.751843] ================================================================== [ 59.752737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.753680] Read of size 8 at addr ffff88800db6b4e0 by task sshd/220 [ 59.754451] [ 59.754671] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 59.755824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.756797] Call Trace: [ 59.757116] [ 59.757419] dump_stack_lvl+0x91/0xf0 [ 59.757918] print_report+0xcc/0x620 [ 59.758404] ? __virt_addr_valid+0x102/0x340 [ 59.758958] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.759571] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.760184] kasan_report+0xbe/0xf0 [ 59.760659] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.761280] vma_interval_tree_remove+0xc75/0xec0 [ 59.761888] vma_prepare+0xc54/0x11a0 [ 59.762362] __split_vma+0x5af/0x950 [ 59.762828] ? __pfx___split_vma+0x10/0x10 [ 59.763353] ? find_held_lock+0x2c/0x110 [ 59.763871] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.764432] ? lock_is_held_type+0x9f/0x120 [ 59.764969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.765567] ? mtree_range_walk+0x632/0x900 [ 59.766133] ? mas_walk+0x5c7/0x7c0 [ 59.766602] do_vmi_munmap+0x1f1/0x2b0 [ 59.767094] mmap_region+0x1f9/0x2660 [ 59.767577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.768086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.768789] ? __pfx_lock_acquire+0x10/0x10 [ 59.769316] ? __pfx_mmap_region+0x10/0x10 [ 59.769848] ? security_mmap_addr+0x7d/0xa0 [ 59.770380] ? get_unmapped_area+0x1f5/0x3f0 [ 59.770924] do_mmap+0x854/0xf00 [ 59.771361] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.771848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.772407] ksys_mmap_pgoff+0x3af/0x500 [ 59.772911] do_syscall_64+0x3f/0x90 [ 59.773382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.774041] RIP: 0033:0x7f8f96ba4d82 [ 59.774496] 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 [ 59.776584] RSP: 002b:00007fff4362e928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.777486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f96ba4d82 [ 59.778351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f95fde000 [ 59.779202] RBP: 00007f8f95fde000 R08: 0000000000000009 R09: 0000000000001000 [ 59.780063] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cefdca5ec0 [ 59.780914] R13: 00007fff4362e940 R14: 00007fff4362e970 R15: 00007fff4362ecd0 [ 59.781789] [ 59.782079] [ 59.782293] Allocated by task 213: [ 59.782717] kasan_save_stack+0x22/0x50 [ 59.783216] kasan_set_track+0x25/0x30 [ 59.783715] __kasan_slab_alloc+0x59/0x70 [ 59.784235] kmem_cache_alloc+0x16b/0x370 [ 59.784746] vm_area_dup+0x20/0x160 [ 59.785197] __split_vma+0x170/0x950 [ 59.785661] split_vma+0xc6/0x110 [ 59.786112] mprotect_fixup+0x8d2/0xb30 [ 59.786621] do_mprotect_pkey+0x87e/0xd40 [ 59.787135] __x64_sys_mprotect+0x78/0xc0 [ 59.787655] do_syscall_64+0x3f/0x90 [ 59.788130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.788771] [ 59.788984] Freed by task 213: [ 59.789376] kasan_save_stack+0x22/0x50 [ 59.789881] kasan_set_track+0x25/0x30 [ 59.790375] kasan_save_free_info+0x2b/0x50 [ 59.790901] __kasan_slab_free+0x10a/0x190 [ 59.791433] kmem_cache_free+0x10d/0x4d0 [ 59.791933] rcu_core+0x8c8/0x2860 [ 59.792374] __do_softirq+0x1b7/0x7d4 [ 59.792851] [ 59.793063] Last potentially related work creation: [ 59.793645] kasan_save_stack+0x22/0x50 [ 59.794168] __kasan_record_aux_stack+0x8e/0xa0 [ 59.794746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.795382] remove_vma+0x139/0x170 [ 59.795830] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.796400] do_vmi_munmap+0x1f1/0x2b0 [ 59.796885] __vm_munmap+0x138/0x3a0 [ 59.797347] __x64_sys_munmap+0x59/0x80 [ 59.797846] do_syscall_64+0x3f/0x90 [ 59.798324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.798958] [ 59.799174] Second to last potentially related work creation: [ 59.799855] kasan_save_stack+0x22/0x50 [ 59.800353] __kasan_record_aux_stack+0x8e/0xa0 [ 59.800922] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.801560] remove_vma+0x139/0x170 [ 59.802014] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.802569] do_vmi_munmap+0x1f1/0x2b0 [ 59.803049] mmap_region+0x1f9/0x2660 [ 59.803528] do_mmap+0x854/0xf00 [ 59.803955] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.804442] ksys_mmap_pgoff+0x3af/0x500 [ 59.804941] do_syscall_64+0x3f/0x90 [ 59.805418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.806075] [ 59.806288] The buggy address belongs to the object at ffff88800db6b488 [ 59.806288] which belongs to the cache vm_area_struct of size 168 [ 59.807731] The buggy address is located 88 bytes inside of [ 59.807731] freed 168-byte region [ffff88800db6b488, ffff88800db6b530) [ 59.809121] [ 59.809339] The buggy address belongs to the physical page: [ 59.810000] page:00000000dd62d6fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb6b [ 59.811070] memcg:ffff88800f52ae01 [ 59.811496] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 59.812186] page_type: 0xffffffff() [ 59.812638] raw: 0100000000000200 ffff88800879fc80 ffffea000037e8c0 dead000000000003 [ 59.813549] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f52ae01 [ 59.814455] page dumped because: kasan: bad access detected [ 59.815108] [ 59.815328] Memory state around the buggy address: [ 59.815919] ffff88800db6b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 59.816761] ffff88800db6b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 59.817629] >ffff88800db6b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.818492] ^ [ 59.819248] ffff88800db6b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 59.820098] ffff88800db6b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.820952] ================================================================== [ 59.821923] Disabling lock debugging due to kernel taint [ 61.754925] BUG: Bad rss-counter state mm:0000000064d5f8d2 type:MM_FILEPAGES val:33 [ 61.755871] BUG: Bad rss-counter state mm:0000000064d5f8d2 type:MM_ANONPAGES val:22 [ 62.335427] BUG: Bad rss-counter state mm:000000009deb30ca type:MM_FILEPAGES val:33 [ 62.336371] BUG: Bad rss-counter state mm:000000009deb30ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52959' (ECDSA) to the list of known hosts. 2023/06/20 06:33:33 fuzzer started 2023/06/20 06:33:33 dialing manager at localhost:44161 2023/06/20 06:33:33 checking machine... 2023/06/20 06:33:33 checking revisions... [ 63.031628] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:33:33 testing simple program... [ 63.084748] cgroup: Unknown subsys name 'net' [ 63.137435] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016e6f548 RCX=0000000000000001 RDX=1ffff11002dcdeab RSI=ffff888016e6ff58 RDI=ffff888016e6f558 RBP=ffff888016e6ff58 RSP=ffff888016e6f4a0 R8 =ffffffff864b9d5a R9 =ffff888016e6f588 R10=0000000000038001 R11=00000000000b6996 R12=00000000000000a8 R13=ffff888016e68000 R14=ffff888016e6ff58 R15=ffff888016e6f548 RIP=ffffffff81130468 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 00007f704fb75700 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=00007fcd630a3618 CR3=000000000f492000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033333a3333 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303936 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5f2eef1990 CR3=000000000cb42000 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=c0e1b967beabc082674be6b6dd63f589 XMM02=0000000000121508ec2efd57dc4c00df XMM03=00000000001287104886389bf5b238aa XMM04=f2ef93ec064d45fa00000000000ae988 XMM05=9f33f09f5e87b158000000000013ada0 XMM06=4fda316b135da52b0000000000139e98 XMM07=e042d86d42eb936e0000000000128990 XMM08=4886389bf5b238aa0000000000121568 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000