syzkaller login: [ 32.612176] BUG: Bad rss-counter state mm:0000000047679413 type:MM_FILEPAGES val:33 [ 32.614271] BUG: Bad rss-counter state mm:0000000047679413 type:MM_ANONPAGES val:22 [ 32.781974] ================================================================== [ 32.783115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.784422] Read of size 8 at addr ffff888019795140 by task sshd/220 [ 32.785430] [ 32.785711] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.786818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.788026] Call Trace: [ 32.788380] <TASK> [ 32.788695] dump_stack_lvl+0x91/0xf0 [ 32.789235] print_report+0xcc/0x620 [ 32.789775] ? __virt_addr_valid+0x102/0x340 [ 32.790386] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.791082] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.791793] kasan_report+0xbe/0xf0 [ 32.792333] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.793030] vma_interval_tree_remove+0xc75/0xec0 [ 32.793711] vma_prepare+0xc54/0x11a0 [ 32.794249] __split_vma+0x5af/0x950 [ 32.794782] ? __pfx___split_vma+0x10/0x10 [ 32.795389] ? find_held_lock+0x2c/0x110 [ 32.795981] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.796621] ? lock_is_held_type+0x9f/0x120 [ 32.797234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.797917] ? mtree_range_walk+0x632/0x900 [ 32.798540] ? mas_walk+0x5c7/0x7c0 [ 32.799069] do_vmi_munmap+0x1f1/0x2b0 [ 32.799636] mmap_region+0x1f9/0x2660 [ 32.800174] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.800745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.801538] ? __pfx_lock_acquire+0x10/0x10 [ 32.802147] ? __pfx_mmap_region+0x10/0x10 [ 32.802749] ? security_mmap_addr+0x7d/0xa0 [ 32.803356] ? get_unmapped_area+0x1f5/0x3f0 [ 32.803972] do_mmap+0x854/0xf00 [ 32.804465] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.805023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.805652] ksys_mmap_pgoff+0x3af/0x500 [ 32.806220] do_syscall_64+0x3f/0x90 [ 32.806748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.807497] RIP: 0033:0x7fd9e7a8ed82 [ 32.808005] 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 [ 32.810329] RSP: 002b:00007ffec7430e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.811343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9e7a8ed82 [ 32.812267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9e6ec8000 [ 32.813197] RBP: 00007fd9e6ec8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.814112] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c14919eec0 [ 32.815045] R13: 00007ffec7430e20 R14: 00007ffec7430e50 R15: 00007ffec74311b0 [ 32.815989] </TASK> [ 32.816314] [ 32.816555] Allocated by task 213: [ 32.817021] kasan_save_stack+0x22/0x50 [ 32.817581] kasan_set_track+0x25/0x30 [ 32.818133] __kasan_slab_alloc+0x59/0x70 [ 32.818714] kmem_cache_alloc+0x16b/0x370 [ 32.819303] vm_area_dup+0x20/0x160 [ 32.819806] __split_vma+0x170/0x950 [ 32.820319] split_vma+0xc6/0x110 [ 32.820806] mprotect_fixup+0x8d2/0xb30 [ 32.821363] do_mprotect_pkey+0x87e/0xd40 [ 32.821931] __x64_sys_mprotect+0x78/0xc0 [ 32.822508] do_syscall_64+0x3f/0x90 [ 32.823031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.823747] [ 32.823983] Freed by task 213: [ 32.824419] kasan_save_stack+0x22/0x50 [ 32.824979] kasan_set_track+0x25/0x30 [ 32.825589] kasan_save_free_info+0x2b/0x50 [ 32.826172] __kasan_slab_free+0x10a/0x190 [ 32.826768] kmem_cache_free+0x10d/0x4d0 [ 32.827336] rcu_core+0x8c8/0x2860 [ 32.827831] __do_softirq+0x1b7/0x7d4 [ 32.828359] [ 32.828596] Last potentially related work creation: [ 32.829245] kasan_save_stack+0x22/0x50 [ 32.829803] __kasan_record_aux_stack+0x8e/0xa0 [ 32.830437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.831152] remove_vma+0x139/0x170 [ 32.831657] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.832260] do_vmi_munmap+0x1f1/0x2b0 [ 32.832800] __vm_munmap+0x138/0x3a0 [ 32.833310] __x64_sys_munmap+0x59/0x80 [ 32.833851] do_syscall_64+0x3f/0x90 [ 32.834377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.835081] [ 32.835316] The buggy address belongs to the object at ffff8880197950e8 [ 32.835316] which belongs to the cache vm_area_struct of size 168 [ 32.836892] The buggy address is located 88 bytes inside of [ 32.836892] freed 168-byte region [ffff8880197950e8, ffff888019795190) [ 32.838406] [ 32.838644] The buggy address belongs to the physical page: [ 32.839376] page:000000000a39f810 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19795 [ 32.840557] memcg:ffff88800e94be01 [ 32.841020] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.841721] page_type: 0xffffffff() [ 32.842221] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.843228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e94be01 [ 32.844214] page dumped because: kasan: bad access detected [ 32.844933] [ 32.845164] Memory state around the buggy address: [ 32.845781] ffff888019795000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.846700] ffff888019795080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.847633] >ffff888019795100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.848546] ^ [ 32.849258] ffff888019795180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.850185] ffff888019795200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.851098] ================================================================== [ 32.852114] Disabling lock debugging due to kernel taint [ 34.520737] BUG: Bad rss-counter state mm:00000000dc3c5597 type:MM_FILEPAGES val:33 [ 34.521738] BUG: Bad rss-counter state mm:00000000dc3c5597 type:MM_ANONPAGES val:22 [ 34.996837] BUG: Bad rss-counter state mm:00000000d6d11432 type:MM_FILEPAGES val:33 [ 34.997847] BUG: Bad rss-counter state mm:00000000d6d11432 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16065' (ECDSA) to the list of known hosts. 2023/06/19 20:41:04 fuzzer started 2023/06/19 20:41:04 dialing manager at localhost:44161 2023/06/19 20:41:04 checking machine... 2023/06/19 20:41:04 checking revisions... [ 35.740450] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:41:04 testing simple program... [ 35.803884] cgroup: Unknown subsys name 'net' [ 35.840908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:41:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000004e RCX=0000000000000000 RDX=ffff888016b33680 RSI=ffffffff8184cec9 RDI=ffffea00006a5900 RBP=ffff88801a96504e RSP=ffff8880147978d0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff88801a965000 R13=0000000000000000 R14=ffffea00006a5940 R15=ffffea00006a5900 RIP=ffffffff8184cecd RFL=00000293 [--S-A-C] 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 00007fd9385ab900 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=00007fd9379cb8a0 CR3=000000001014e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7e4d95aac491386800000000000ae988 XMM05=2f88e5428e2500800000000000134ba0 XMM06=4fda316b135da52b0000000000133c40 XMM07=fb795ef6d65770560000000000124258 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff81364a8e RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888008d87c20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9e7479 R12=0000000000006890 R13=dffffc0000000000 R14=0000000000006890 R15=000000000000688c RIP=ffffffff8180f009 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 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=00007f961ab460b0 CR3=000000000e86a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000