syzkaller login: [ 45.518153] BUG: Bad rss-counter state mm:000000003d926f8c type:MM_FILEPAGES val:33 [ 45.519349] BUG: Bad rss-counter state mm:000000003d926f8c type:MM_ANONPAGES val:22 [ 45.557575] ================================================================== [ 45.558486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.559535] Read of size 8 at addr ffff8880166d8968 by task sshd/221 [ 45.560314] [ 45.560547] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.561417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.562419] Call Trace: [ 45.562739] [ 45.563035] dump_stack_lvl+0x91/0xf0 [ 45.563538] print_report+0xcc/0x620 [ 45.564017] ? __virt_addr_valid+0x102/0x340 [ 45.564610] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.565244] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.565876] kasan_report+0xbe/0xf0 [ 45.566349] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.566983] vma_interval_tree_remove+0xc75/0xec0 [ 45.567588] vma_prepare+0xc54/0x11a0 [ 45.568068] __split_vma+0x5af/0x950 [ 45.568548] ? __pfx___split_vma+0x10/0x10 [ 45.569078] ? find_held_lock+0x2c/0x110 [ 45.569601] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.570172] ? lock_is_held_type+0x9f/0x120 [ 45.570716] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.571328] ? mtree_range_walk+0x632/0x900 [ 45.571884] ? mas_walk+0x5c7/0x7c0 [ 45.572369] do_vmi_munmap+0x1f1/0x2b0 [ 45.572868] mmap_region+0x1f9/0x2660 [ 45.573357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.573865] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.574582] ? __pfx_lock_acquire+0x10/0x10 [ 45.575121] ? __pfx_mmap_region+0x10/0x10 [ 45.575651] ? security_mmap_addr+0x7d/0xa0 [ 45.576190] ? get_unmapped_area+0x1f5/0x3f0 [ 45.576768] do_mmap+0x854/0xf00 [ 45.577212] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.577717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.578283] ksys_mmap_pgoff+0x3af/0x500 [ 45.578785] do_syscall_64+0x3f/0x90 [ 45.579264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.579910] RIP: 0033:0x7fe6e9b5bd82 [ 45.580381] 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 [ 45.582518] RSP: 002b:00007ffdc6a74d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.583421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6e9b5bd82 [ 45.584277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6e8f95000 [ 45.585128] RBP: 00007fe6e8f95000 R08: 0000000000000009 R09: 0000000000001000 [ 45.585981] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586a1505ec0 [ 45.586832] R13: 00007ffdc6a74d70 R14: 00007ffdc6a74da0 R15: 00007ffdc6a75100 [ 45.587686] [ 45.587979] [ 45.588195] Allocated by task 214: [ 45.588652] kasan_save_stack+0x22/0x50 [ 45.589158] kasan_set_track+0x25/0x30 [ 45.589653] __kasan_slab_alloc+0x59/0x70 [ 45.590180] kmem_cache_alloc+0x16b/0x370 [ 45.590703] vm_area_dup+0x20/0x160 [ 45.591154] __split_vma+0x170/0x950 [ 45.591631] split_vma+0xc6/0x110 [ 45.592067] mprotect_fixup+0x8d2/0xb30 [ 45.592591] do_mprotect_pkey+0x87e/0xd40 [ 45.593110] __x64_sys_mprotect+0x78/0xc0 [ 45.593632] do_syscall_64+0x3f/0x90 [ 45.594103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.594742] [ 45.594956] Freed by task 214: [ 45.595355] kasan_save_stack+0x22/0x50 [ 45.595855] kasan_set_track+0x25/0x30 [ 45.596351] kasan_save_free_info+0x2b/0x50 [ 45.596903] __kasan_slab_free+0x10a/0x190 [ 45.597438] kmem_cache_free+0x10d/0x4d0 [ 45.597942] rcu_core+0x8c8/0x2860 [ 45.598386] __do_softirq+0x1b7/0x7d4 [ 45.598859] [ 45.599079] Last potentially related work creation: [ 45.599674] kasan_save_stack+0x22/0x50 [ 45.600174] __kasan_record_aux_stack+0x8e/0xa0 [ 45.600762] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.601409] remove_vma+0x139/0x170 [ 45.601859] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.602421] do_vmi_munmap+0x1f1/0x2b0 [ 45.602905] __vm_munmap+0x138/0x3a0 [ 45.603377] __x64_sys_munmap+0x59/0x80 [ 45.603884] do_syscall_64+0x3f/0x90 [ 45.604368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.605027] [ 45.605244] The buggy address belongs to the object at ffff8880166d8910 [ 45.605244] which belongs to the cache vm_area_struct of size 168 [ 45.606710] The buggy address is located 88 bytes inside of [ 45.606710] freed 168-byte region [ffff8880166d8910, ffff8880166d89b8) [ 45.608126] [ 45.608343] The buggy address belongs to the physical page: [ 45.609021] page:00000000018e0fa5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166d8 [ 45.610108] memcg:ffff88800df10901 [ 45.610541] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.611202] page_type: 0xffffffff() [ 45.611653] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.612579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df10901 [ 45.613493] page dumped because: kasan: bad access detected [ 45.614156] [ 45.614378] Memory state around the buggy address: [ 45.614955] ffff8880166d8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 45.615822] ffff8880166d8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 45.616706] >ffff8880166d8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.617558] ^ [ 45.618342] ffff8880166d8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 45.619208] ffff8880166d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.620059] ================================================================== [ 45.621099] Disabling lock debugging due to kernel taint [ 48.001228] BUG: Bad rss-counter state mm:0000000008ae6781 type:MM_FILEPAGES val:33 [ 48.002397] BUG: Bad rss-counter state mm:0000000008ae6781 type:MM_ANONPAGES val:22 [ 48.457355] BUG: Bad rss-counter state mm:0000000018eb0b24 type:MM_FILEPAGES val:33 [ 48.458533] BUG: Bad rss-counter state mm:0000000018eb0b24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51429' (ECDSA) to the list of known hosts. 2023/06/19 13:32:05 fuzzer started 2023/06/19 13:32:06 dialing manager at localhost:44161 2023/06/19 13:32:06 checking machine... 2023/06/19 13:32:06 checking revisions... [ 49.140163] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:32:06 testing simple program... [ 49.187950] cgroup: Unknown subsys name 'net' [ 49.249906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:31:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e173be8 RCX=0000000000000000 RDX=1ffff11001c2e77d RSI=0000000000000000 RDI=ffffffff870a5560 RBP=ffffffff8486e780 RSP=ffff8880198bfc90 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88800e173be7 R11=00000000000b6996 R12=ffffffff870a5560 R13=0000000000000002 R14=ffffffff87f30860 R15=ffff888008f92000 RIP=ffffffff812dfbbf RFL=00000216 [----AP-] 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 00007fe3fdb8a900 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=00007ffe63f04000 CR3=0000000019b74000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f8cdb375000 CR3=000000000f058000 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=2035303a32333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a32333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000