syzkaller login: [ 30.827175] BUG: Bad rss-counter state mm:00000000af86b398 type:MM_FILEPAGES val:33 [ 30.828720] BUG: Bad rss-counter state mm:00000000af86b398 type:MM_ANONPAGES val:22 [ 30.971929] ================================================================== [ 30.972970] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.973894] Read of size 8 at addr ffff888016ba9798 by task sshd/221 [ 30.974759] [ 30.974981] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.975851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.976858] Call Trace: [ 30.977180] [ 30.977469] dump_stack_lvl+0x91/0xf0 [ 30.977972] print_report+0xcc/0x620 [ 30.978451] ? __virt_addr_valid+0x102/0x340 [ 30.979006] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.979636] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980281] kasan_report+0xbe/0xf0 [ 30.980766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.981385] vma_interval_tree_remove+0xc75/0xec0 [ 30.981984] vma_prepare+0xc54/0x11a0 [ 30.982460] __split_vma+0x5af/0x950 [ 30.982940] ? __pfx___split_vma+0x10/0x10 [ 30.983466] ? find_held_lock+0x2c/0x110 [ 30.983982] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.984571] ? lock_is_held_type+0x9f/0x120 [ 30.985114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.985716] ? mtree_range_walk+0x632/0x900 [ 30.986265] ? mas_walk+0x5c7/0x7c0 [ 30.986738] do_vmi_munmap+0x1f1/0x2b0 [ 30.987231] mmap_region+0x1f9/0x2660 [ 30.987709] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.988220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.988957] ? __pfx_lock_acquire+0x10/0x10 [ 30.989501] ? __pfx_mmap_region+0x10/0x10 [ 30.990034] ? security_mmap_addr+0x7d/0xa0 [ 30.990563] ? get_unmapped_area+0x1f5/0x3f0 [ 30.991109] do_mmap+0x854/0xf00 [ 30.991544] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.992037] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.992623] ksys_mmap_pgoff+0x3af/0x500 [ 30.993135] do_syscall_64+0x3f/0x90 [ 30.993608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.994254] RIP: 0033:0x7f166090dd82 [ 30.994709] 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 [ 30.996822] RSP: 002b:00007ffdbc388ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.997725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f166090dd82 [ 30.998579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f165fd47000 [ 30.999441] RBP: 00007f165fd47000 R08: 0000000000000009 R09: 0000000000001000 [ 31.000300] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a0d122f70 [ 31.001184] R13: 00007ffdbc388af0 R14: 00007ffdbc388b20 R15: 00007ffdbc388e80 [ 31.002041] [ 31.002333] [ 31.002556] Allocated by task 214: [ 31.002989] kasan_save_stack+0x22/0x50 [ 31.003515] kasan_set_track+0x25/0x30 [ 31.004029] __kasan_slab_alloc+0x59/0x70 [ 31.004617] kmem_cache_alloc+0x16b/0x370 [ 31.005157] vm_area_dup+0x20/0x160 [ 31.005622] __split_vma+0x170/0x950 [ 31.006098] split_vma+0xc6/0x110 [ 31.006542] mprotect_fixup+0x8d2/0xb30 [ 31.007063] do_mprotect_pkey+0x87e/0xd40 [ 31.007601] __x64_sys_mprotect+0x78/0xc0 [ 31.008142] do_syscall_64+0x3f/0x90 [ 31.008645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.009308] [ 31.009529] Freed by task 19: [ 31.009932] kasan_save_stack+0x22/0x50 [ 31.010454] kasan_set_track+0x25/0x30 [ 31.010958] kasan_save_free_info+0x2b/0x50 [ 31.011512] __kasan_slab_free+0x10a/0x190 [ 31.012059] kmem_cache_free+0x10d/0x4d0 [ 31.012602] rcu_core+0x8c8/0x2860 [ 31.013067] __do_softirq+0x1b7/0x7d4 [ 31.013566] [ 31.013790] Last potentially related work creation: [ 31.014399] kasan_save_stack+0x22/0x50 [ 31.014917] __kasan_record_aux_stack+0x8e/0xa0 [ 31.015521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.016193] remove_vma+0x139/0x170 [ 31.016687] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.017266] do_vmi_munmap+0x1f1/0x2b0 [ 31.017761] __vm_munmap+0x138/0x3a0 [ 31.018240] __x64_sys_munmap+0x59/0x80 [ 31.018749] do_syscall_64+0x3f/0x90 [ 31.019242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.019904] [ 31.020132] The buggy address belongs to the object at ffff888016ba9740 [ 31.020132] which belongs to the cache vm_area_struct of size 168 [ 31.021677] The buggy address is located 88 bytes inside of [ 31.021677] freed 168-byte region [ffff888016ba9740, ffff888016ba97e8) [ 31.023129] [ 31.023351] The buggy address belongs to the physical page: [ 31.024033] page:0000000068884c58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ba9 [ 31.025185] memcg:ffff888016ba7101 [ 31.025626] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.026295] page_type: 0xffffffff() [ 31.026761] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.027723] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ba7101 [ 31.028680] page dumped because: kasan: bad access detected [ 31.029367] [ 31.029583] Memory state around the buggy address: [ 31.030176] ffff888016ba9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.031053] ffff888016ba9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.031931] >ffff888016ba9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.032821] ^ [ 31.033329] ffff888016ba9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.034207] ffff888016ba9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.035084] ================================================================== [ 31.036131] Disabling lock debugging due to kernel taint [ 32.967687] BUG: Bad rss-counter state mm:00000000ce15dc1b type:MM_FILEPAGES val:33 [ 32.968738] BUG: Bad rss-counter state mm:00000000ce15dc1b type:MM_ANONPAGES val:22 [ 33.525480] BUG: Bad rss-counter state mm:00000000d48704ac type:MM_FILEPAGES val:33 [ 33.526643] BUG: Bad rss-counter state mm:00000000d48704ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19091' (ECDSA) to the list of known hosts. 2023/06/21 04:08:56 fuzzer started 2023/06/21 04:08:56 dialing manager at localhost:36067 2023/06/21 04:08:56 checking machine... 2023/06/21 04:08:56 checking revisions... [ 34.198547] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:08:56 testing simple program... [ 34.238224] cgroup: Unknown subsys name 'net' [ 34.280097] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:08:55 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff888008d9f9f8 RDX=1ffff110011b3f36 RSI=ffff888008d9f9f0 RDI=ffffffff813ad720 RBP=ffff888008d9f9f0 RSP=ffff888008d9f958 R8 =0000000000000001 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d9fa20 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800d994d80 RIP=ffffffff810bd06d 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=00007f304a18e438 CR3=0000000008ece000 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=9a291f8793b7e4b8e141b200fc37cfe8 XMM02=000000000011a538ec2efd57dc4c00df XMM03=0000000000121ab0a13af83a31717140 XMM04=bd6d7afe9ad957bb00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131910 XMM06=bfa908a827c4199f0000000000130778 XMM07=e042d86d42eb936e0000000000121d30 XMM08=a13af83a31717140000000000011a598 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007f4cf1f10618 CR3=000000000e486000 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=2035353a38303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000