syzkaller login: [ 30.689113] BUG: Bad rss-counter state mm:00000000c746e7af type:MM_FILEPAGES val:33 [ 30.689920] BUG: Bad rss-counter state mm:00000000c746e7af type:MM_ANONPAGES val:22 [ 30.827165] ================================================================== [ 30.828060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.828994] Read of size 8 at addr ffff888017f50310 by task sshd/221 [ 30.829884] [ 30.830111] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.830965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.831949] Call Trace: [ 30.832267] [ 30.832550] dump_stack_lvl+0x91/0xf0 [ 30.833044] print_report+0xcc/0x620 [ 30.833526] ? __virt_addr_valid+0x102/0x340 [ 30.834102] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834723] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835340] kasan_report+0xbe/0xf0 [ 30.835809] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836430] vma_interval_tree_remove+0xc75/0xec0 [ 30.837033] vma_prepare+0xc54/0x11a0 [ 30.837503] __split_vma+0x5af/0x950 [ 30.837969] ? __pfx___split_vma+0x10/0x10 [ 30.838515] ? find_held_lock+0x2c/0x110 [ 30.839032] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.839588] ? lock_is_held_type+0x9f/0x120 [ 30.840121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.840729] ? mtree_range_walk+0x632/0x900 [ 30.841286] ? mas_walk+0x5c7/0x7c0 [ 30.841756] do_vmi_munmap+0x1f1/0x2b0 [ 30.842261] mmap_region+0x1f9/0x2660 [ 30.842742] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.843252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.843962] ? __pfx_lock_acquire+0x10/0x10 [ 30.844492] ? __pfx_mmap_region+0x10/0x10 [ 30.845022] ? security_mmap_addr+0x7d/0xa0 [ 30.845550] ? get_unmapped_area+0x1f5/0x3f0 [ 30.846126] do_mmap+0x854/0xf00 [ 30.846561] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.847054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.847617] ksys_mmap_pgoff+0x3af/0x500 [ 30.848131] do_syscall_64+0x3f/0x90 [ 30.848613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849255] RIP: 0033:0x7f62a2a0bd82 [ 30.849705] 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 [ 30.851827] RSP: 002b:00007ffcac613fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.852716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62a2a0bd82 [ 30.853555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62a1e45000 [ 30.854402] RBP: 00007f62a1e45000 R08: 0000000000000009 R09: 0000000000001000 [ 30.855243] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559027a0fec0 [ 30.856073] R13: 00007ffcac613fd0 R14: 00007ffcac614000 R15: 00007ffcac614360 [ 30.856922] [ 30.857214] [ 30.857427] Allocated by task 214: [ 30.857849] kasan_save_stack+0x22/0x50 [ 30.858376] kasan_set_track+0x25/0x30 [ 30.858866] __kasan_slab_alloc+0x59/0x70 [ 30.859391] kmem_cache_alloc+0x16b/0x370 [ 30.859903] vm_area_dup+0x20/0x160 [ 30.860359] __split_vma+0x170/0x950 [ 30.860821] split_vma+0xc6/0x110 [ 30.861261] mprotect_fixup+0x8d2/0xb30 [ 30.861764] do_mprotect_pkey+0x87e/0xd40 [ 30.862288] __x64_sys_mprotect+0x78/0xc0 [ 30.862804] do_syscall_64+0x3f/0x90 [ 30.863280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863922] [ 30.864134] Freed by task 13: [ 30.864512] kasan_save_stack+0x22/0x50 [ 30.865012] kasan_set_track+0x25/0x30 [ 30.865501] kasan_save_free_info+0x2b/0x50 [ 30.866043] __kasan_slab_free+0x10a/0x190 [ 30.866578] kmem_cache_free+0x10d/0x4d0 [ 30.867082] rcu_core+0x8c8/0x2860 [ 30.867526] __do_softirq+0x1b7/0x7d4 [ 30.867998] [ 30.868217] Last potentially related work creation: [ 30.868804] kasan_save_stack+0x22/0x50 [ 30.869306] __kasan_record_aux_stack+0x8e/0xa0 [ 30.869874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.870523] remove_vma+0x139/0x170 [ 30.870969] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.871522] do_vmi_munmap+0x1f1/0x2b0 [ 30.872000] __vm_munmap+0x138/0x3a0 [ 30.872467] __x64_sys_munmap+0x59/0x80 [ 30.872962] do_syscall_64+0x3f/0x90 [ 30.873433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874083] [ 30.874296] The buggy address belongs to the object at ffff888017f502b8 [ 30.874296] which belongs to the cache vm_area_struct of size 168 [ 30.875752] The buggy address is located 88 bytes inside of [ 30.875752] freed 168-byte region [ffff888017f502b8, ffff888017f50360) [ 30.877153] [ 30.877364] The buggy address belongs to the physical page: [ 30.878030] page:00000000bc141db6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f50 [ 30.879110] memcg:ffff888009483001 [ 30.879536] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880177] page_type: 0xffffffff() [ 30.880626] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.881548] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009483001 [ 30.882454] page dumped because: kasan: bad access detected [ 30.883109] [ 30.883321] Memory state around the buggy address: [ 30.883904] ffff888017f50200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.884745] ffff888017f50280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.885597] >ffff888017f50300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.886453] ^ [ 30.886916] ffff888017f50380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.887768] ffff888017f50400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.888625] ================================================================== [ 30.889825] Disabling lock debugging due to kernel taint [ 33.191948] BUG: Bad rss-counter state mm:00000000121a11e4 type:MM_FILEPAGES val:33 [ 33.192938] BUG: Bad rss-counter state mm:00000000121a11e4 type:MM_ANONPAGES val:22 [ 33.650947] BUG: Bad rss-counter state mm:0000000058d77ede type:MM_FILEPAGES val:33 [ 33.651942] BUG: Bad rss-counter state mm:0000000058d77ede type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40430' (ECDSA) to the list of known hosts. 2023/06/20 21:51:17 fuzzer started 2023/06/20 21:51:18 dialing manager at localhost:36067 2023/06/20 21:51:18 checking machine... 2023/06/20 21:51:18 checking revisions... [ 34.381684] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:51:18 testing simple program... [ 34.431584] cgroup: Unknown subsys name 'net' [ 34.468627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:51:17 Registers: info registers vcpu 0 RAX=0000000080010002 RBX=0000000000000004 RCX=ffffffff81454bbf RDX=ffff8880102b9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff8489f180 RSP=ffff88806ce09d48 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000002 R11=00000016e6e5cbc4 R12=0000000000000002 R13=0000000000000005 R14=0000000000000004 R15=dffffc0000000000 RIP=ffffffff814c0261 RFL=00000046 [---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 00007f9550f83900 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=00007fffed006000 CR3=000000000f1ee000 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=ffffffff86138eb5 RBX=0000000000000002 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138eb4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130abf 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=00007fe6a14cfde0 CR3=000000001423c000 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=2037313a31353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a31353a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000