syzkaller login: [ 30.623545] BUG: Bad rss-counter state mm:0000000013293e95 type:MM_FILEPAGES val:33 [ 30.624724] BUG: Bad rss-counter state mm:0000000013293e95 type:MM_ANONPAGES val:22 [ 30.776935] ================================================================== [ 30.777897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.778901] Read of size 8 at addr ffff8880094be880 by task sshd/219 [ 30.779708] [ 30.780122] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.781035] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.782065] Call Trace: [ 30.782421] [ 30.782733] dump_stack_lvl+0x91/0xf0 [ 30.783264] print_report+0xcc/0x620 [ 30.783774] ? __virt_addr_valid+0x102/0x340 [ 30.784362] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785660] kasan_report+0xbe/0xf0 [ 30.786163] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786841] vma_interval_tree_remove+0xc75/0xec0 [ 30.787483] vma_prepare+0xc54/0x11a0 [ 30.787991] __split_vma+0x5af/0x950 [ 30.788493] ? __pfx___split_vma+0x10/0x10 [ 30.789055] ? find_held_lock+0x2c/0x110 [ 30.789611] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.790211] ? lock_is_held_type+0x9f/0x120 [ 30.790799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.791438] ? mtree_range_walk+0x632/0x900 [ 30.792024] ? mas_walk+0x5c7/0x7c0 [ 30.792532] do_vmi_munmap+0x1f1/0x2b0 [ 30.793053] mmap_region+0x1f9/0x2660 [ 30.793563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.794106] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.794880] ? __pfx_lock_acquire+0x10/0x10 [ 30.795448] ? __pfx_mmap_region+0x10/0x10 [ 30.796016] ? security_mmap_addr+0x7d/0xa0 [ 30.796585] ? get_unmapped_area+0x1f5/0x3f0 [ 30.797178] do_mmap+0x854/0xf00 [ 30.797646] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.798170] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.798780] ksys_mmap_pgoff+0x3af/0x500 [ 30.799319] do_syscall_64+0x3f/0x90 [ 30.799826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800513] RIP: 0033:0x7f5abbf9bd82 [ 30.800998] 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 [ 30.803266] RSP: 002b:00007ffd87bcf3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.804222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5abbf9bd82 [ 30.805122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5abb3d5000 [ 30.806023] RBP: 00007f5abb3d5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.806935] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558688fcdec0 [ 30.807831] R13: 00007ffd87bcf400 R14: 00007ffd87bcf430 R15: 00007ffd87bcf790 [ 30.808740] [ 30.809049] [ 30.809277] Allocated by task 212: [ 30.809736] kasan_save_stack+0x22/0x50 [ 30.810274] kasan_set_track+0x25/0x30 [ 30.810802] __kasan_slab_alloc+0x59/0x70 [ 30.811356] kmem_cache_alloc+0x16b/0x370 [ 30.811906] vm_area_dup+0x20/0x160 [ 30.812389] __split_vma+0x170/0x950 [ 30.812889] split_vma+0xc6/0x110 [ 30.813357] mprotect_fixup+0x8d2/0xb30 [ 30.813885] do_mprotect_pkey+0x87e/0xd40 [ 30.814444] __x64_sys_mprotect+0x78/0xc0 [ 30.815022] do_syscall_64+0x3f/0x90 [ 30.815525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816207] [ 30.816436] Freed by task 212: [ 30.816852] kasan_save_stack+0x22/0x50 [ 30.817387] kasan_set_track+0x25/0x30 [ 30.817902] kasan_save_free_info+0x2b/0x50 [ 30.818475] __kasan_slab_free+0x10a/0x190 [ 30.819042] kmem_cache_free+0x10d/0x4d0 [ 30.819580] rcu_core+0x8c8/0x2860 [ 30.820046] __do_softirq+0x1b7/0x7d4 [ 30.820555] [ 30.820840] Last potentially related work creation: [ 30.821460] kasan_save_stack+0x22/0x50 [ 30.821996] __kasan_record_aux_stack+0x8e/0xa0 [ 30.822619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823303] remove_vma+0x139/0x170 [ 30.823778] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824367] do_vmi_munmap+0x1f1/0x2b0 [ 30.824878] __vm_munmap+0x138/0x3a0 [ 30.825374] __x64_sys_munmap+0x59/0x80 [ 30.825897] do_syscall_64+0x3f/0x90 [ 30.826402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827093] [ 30.827324] The buggy address belongs to the object at ffff8880094be828 [ 30.827324] which belongs to the cache vm_area_struct of size 168 [ 30.828869] The buggy address is located 88 bytes inside of [ 30.828869] freed 168-byte region [ffff8880094be828, ffff8880094be8d0) [ 30.830352] [ 30.830585] The buggy address belongs to the physical page: [ 30.831283] page:0000000083856750 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94be [ 30.832432] memcg:ffff88800f6ca901 [ 30.832885] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833567] page_type: 0xffffffff() [ 30.834037] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.835034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6ca901 [ 30.836002] page dumped because: kasan: bad access detected [ 30.836718] [ 30.836946] Memory state around the buggy address: [ 30.837563] ffff8880094be780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.838483] ffff8880094be800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.839380] >ffff8880094be880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.840267] ^ [ 30.840705] ffff8880094be900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.841602] ffff8880094be980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.842511] ================================================================== [ 30.843669] Disabling lock debugging due to kernel taint [ 33.004433] BUG: Bad rss-counter state mm:000000001fe2e2e0 type:MM_FILEPAGES val:33 [ 33.005595] BUG: Bad rss-counter state mm:000000001fe2e2e0 type:MM_ANONPAGES val:22 [ 33.503642] BUG: Bad rss-counter state mm:000000002d036a46 type:MM_FILEPAGES val:33 [ 33.504833] BUG: Bad rss-counter state mm:000000002d036a46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6181' (ECDSA) to the list of known hosts. 2023/06/20 18:42:12 fuzzer started 2023/06/20 18:42:12 dialing manager at localhost:36067 2023/06/20 18:42:12 checking machine... 2023/06/20 18:42:12 checking revisions... [ 34.150690] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:42:12 testing simple program... [ 34.200694] cgroup: Unknown subsys name 'net' [ 34.284335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c521140 RCX=ffffea000038ce01 RDX=ffffea000038ce00 RSI=ffff88800c744700 RDI=ffff888008441500 RBP=0000000000000000 RSP=ffff88801627f808 R8 =ffff88800e33b000 R9 =0000000000000000 R10=ffffea000031d100 R11=000000008040002b R12=dffffc0000000000 R13=ffff88801627f848 R14=ffff88800844f140 R15=ffff88800c744700 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f705fccb900 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=00007f7060280650 CR3=000000000f5d8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8180ce89 RCX=ffffffff86138e01 RDX=1ffff110028efede RSI=0000000000000000 RDI=ffffffff8180ce89 RBP=ffff88801477f6f0 RSP=ffff88801477f668 R8 =ffffffff86138eb4 R9 =ffff88801477f6d8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801477f760 R13=0000000000000000 R14=ffff88800e9f51c0 R15=0000000000000dc0 RIP=ffffffff811fc7a0 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 00007fc9968e8900 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=00007fc995ce2b20 CR3=000000000ca1c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=30b4747ab4d24a5a00000000000ae988 XMM05=918cfd92e704a8e400000000001323c8 XMM06=806171799158d96700000000001311b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000