syzkaller login: [ 58.841596] BUG: Bad rss-counter state mm:000000005955da90 type:MM_FILEPAGES val:33 [ 58.842694] BUG: Bad rss-counter state mm:000000005955da90 type:MM_ANONPAGES val:22 [ 59.007653] ================================================================== [ 59.008737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.009851] Read of size 8 at addr ffff88800c7b5798 by task sshd/221 [ 59.010950] [ 59.011215] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 59.012431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.013592] Call Trace: [ 59.014022] [ 59.014364] dump_stack_lvl+0x91/0xf0 [ 59.014985] print_report+0xcc/0x620 [ 59.015559] ? __virt_addr_valid+0x102/0x340 [ 59.016105] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.016717] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.017332] kasan_report+0xbe/0xf0 [ 59.017833] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.018528] vma_interval_tree_remove+0xc75/0xec0 [ 59.019159] vma_prepare+0xc54/0x11a0 [ 59.019661] __split_vma+0x5af/0x950 [ 59.020166] ? __pfx___split_vma+0x10/0x10 [ 59.020717] ? find_held_lock+0x2c/0x110 [ 59.021268] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.021896] ? lock_is_held_type+0x9f/0x120 [ 59.022474] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.023138] ? mtree_range_walk+0x632/0x900 [ 59.023713] ? mas_walk+0x5c7/0x7c0 [ 59.024233] do_vmi_munmap+0x1f1/0x2b0 [ 59.024756] mmap_region+0x1f9/0x2660 [ 59.025263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.025807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.026612] ? __pfx_lock_acquire+0x10/0x10 [ 59.027171] ? __pfx_mmap_region+0x10/0x10 [ 59.027725] ? security_mmap_addr+0x7d/0xa0 [ 59.028288] ? get_unmapped_area+0x1f5/0x3f0 [ 59.028868] do_mmap+0x854/0xf00 [ 59.029322] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.029876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.030497] ksys_mmap_pgoff+0x3af/0x500 [ 59.031034] do_syscall_64+0x3f/0x90 [ 59.031547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.032224] RIP: 0033:0x7fc2b70d3d82 [ 59.032718] 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 [ 59.035036] RSP: 002b:00007fffcf71af28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.035996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2b70d3d82 [ 59.036905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2b650d000 [ 59.037821] RBP: 00007fc2b650d000 R08: 0000000000000009 R09: 0000000000001000 [ 59.038778] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593461a8ec0 [ 59.039677] R13: 00007fffcf71af40 R14: 00007fffcf71af70 R15: 00007fffcf71b2d0 [ 59.040582] [ 59.040895] [ 59.041118] Allocated by task 214: [ 59.041569] kasan_save_stack+0x22/0x50 [ 59.042145] kasan_set_track+0x25/0x30 [ 59.042680] __kasan_slab_alloc+0x59/0x70 [ 59.043231] kmem_cache_alloc+0x16b/0x370 [ 59.043770] vm_area_dup+0x20/0x160 [ 59.044247] __split_vma+0x170/0x950 [ 59.044728] split_vma+0xc6/0x110 [ 59.045191] mprotect_fixup+0x8d2/0xb30 [ 59.045722] do_mprotect_pkey+0x87e/0xd40 [ 59.046307] __x64_sys_mprotect+0x78/0xc0 [ 59.046881] do_syscall_64+0x3f/0x90 [ 59.047379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.048063] [ 59.048291] Freed by task 214: [ 59.048704] kasan_save_stack+0x22/0x50 [ 59.049234] kasan_set_track+0x25/0x30 [ 59.049753] kasan_save_free_info+0x2b/0x50 [ 59.050362] __kasan_slab_free+0x10a/0x190 [ 59.050933] kmem_cache_free+0x10d/0x4d0 [ 59.051464] rcu_core+0x8c8/0x2860 [ 59.051929] __do_softirq+0x1b7/0x7d4 [ 59.052436] [ 59.052660] Last potentially related work creation: [ 59.053277] kasan_save_stack+0x22/0x50 [ 59.053816] __kasan_record_aux_stack+0x8e/0xa0 [ 59.054444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.055152] remove_vma+0x139/0x170 [ 59.055627] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.056216] do_vmi_munmap+0x1f1/0x2b0 [ 59.056729] __vm_munmap+0x138/0x3a0 [ 59.057234] __x64_sys_munmap+0x59/0x80 [ 59.057761] do_syscall_64+0x3f/0x90 [ 59.058292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.058989] [ 59.059214] The buggy address belongs to the object at ffff88800c7b5740 [ 59.059214] which belongs to the cache vm_area_struct of size 168 [ 59.060762] The buggy address is located 88 bytes inside of [ 59.060762] freed 168-byte region [ffff88800c7b5740, ffff88800c7b57e8) [ 59.062289] [ 59.062531] The buggy address belongs to the physical page: [ 59.063224] page:000000007046af1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b5 [ 59.064373] memcg:ffff88800c90fc01 [ 59.064825] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.065508] page_type: 0xffffffff() [ 59.066022] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.067033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c90fc01 [ 59.068031] page dumped because: kasan: bad access detected [ 59.068752] [ 59.068976] Memory state around the buggy address: [ 59.069600] ffff88800c7b5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.070516] ffff88800c7b5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 59.071433] >ffff88800c7b5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 59.072366] ^ [ 59.072891] ffff88800c7b5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 59.073792] ffff88800c7b5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 59.074727] ================================================================== [ 59.075934] Disabling lock debugging due to kernel taint [ 60.978395] BUG: Bad rss-counter state mm:0000000055b301ef type:MM_FILEPAGES val:33 [ 60.979300] BUG: Bad rss-counter state mm:0000000055b301ef type:MM_ANONPAGES val:22 [ 61.402547] BUG: Bad rss-counter state mm:00000000b7a1d73a type:MM_FILEPAGES val:33 [ 61.403837] BUG: Bad rss-counter state mm:00000000b7a1d73a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12855' (ECDSA) to the list of known hosts. 2023/06/20 00:46:40 fuzzer started 2023/06/20 00:46:41 dialing manager at localhost:44161 2023/06/20 00:46:41 checking machine... 2023/06/20 00:46:41 checking revisions... [ 62.078872] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:46:41 testing simple program... [ 62.129434] cgroup: Unknown subsys name 'net' [ 62.176118] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:46:11 Registers: info registers vcpu 0 RAX=00007fafb17cb860 RBX=000000000000001c RCX=0000000200000001 RDX=00007fafb17cb880 RSI=0000000000000070 RDI=0000001d00000001 RBP=0000556f9c5d71c0 RSP=00007fafb17cb700 R8 =0000000000000053 R9 =0000000000000000 R10=0000000000000001 R11=00007fafb17cb8b0 R12=0000000000000053 R13=0000000000001fa0 R14=00007fafac000ba0 R15=00007fafb18a2840 RIP=00007fafb189eae1 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fafb17cf700 00000000 00000000 GS =0000 0000000000000000 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=00007fb7019530b0 CR3=000000000ec0a000 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=00000000000834cc000000006490f6f0 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732030343a3634 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343437 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=0000000000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e136e RSI=ffffffff810001ce RDI=ffff88806cf09b68 RBP=000000000000000f RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888013e67b30 RIP=ffffffff813ad459 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 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=00007f4483081028 CR3=000000000cc1a000 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=6c93856555b790ab454e8e4ccbfedb07 XMM02=ec2efd57dc4c00df0000000000120d58 XMM03=d97040ec6da488150000000000120e28 XMM04=021be743bae0f4b100000000000ae988 XMM05=e4cb8bb95a7664b60000000000138838 XMM06=c02d2213a0e2f15000000000001376a0 XMM07=e042d86d42eb936e00000000001288f0 XMM08=d97040ec6da488150000000000120e28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000