syzkaller login: [ 30.674190] BUG: Bad rss-counter state mm:0000000006d884f5 type:MM_FILEPAGES val:33 [ 30.675443] BUG: Bad rss-counter state mm:0000000006d884f5 type:MM_ANONPAGES val:22 [ 30.810587] ================================================================== [ 30.811538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.812511] Read of size 8 at addr ffff888019e8fa50 by task sshd/220 [ 30.813418] [ 30.813639] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.814575] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.815608] Call Trace: [ 30.815943] [ 30.816236] dump_stack_lvl+0x91/0xf0 [ 30.816749] print_report+0xcc/0x620 [ 30.817255] ? __virt_addr_valid+0x102/0x340 [ 30.817829] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818487] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819124] kasan_report+0xbe/0xf0 [ 30.819607] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820223] vma_interval_tree_remove+0xc75/0xec0 [ 30.820833] vma_prepare+0xc54/0x11a0 [ 30.821311] __split_vma+0x5af/0x950 [ 30.821805] ? __pfx___split_vma+0x10/0x10 [ 30.822364] ? find_held_lock+0x2c/0x110 [ 30.822890] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.823451] ? lock_is_held_type+0x9f/0x120 [ 30.824001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.824619] ? mtree_range_walk+0x632/0x900 [ 30.825182] ? mas_walk+0x5c7/0x7c0 [ 30.825658] do_vmi_munmap+0x1f1/0x2b0 [ 30.826157] mmap_region+0x1f9/0x2660 [ 30.826640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.827159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.827870] ? __pfx_lock_acquire+0x10/0x10 [ 30.828400] ? __pfx_mmap_region+0x10/0x10 [ 30.828940] ? security_mmap_addr+0x7d/0xa0 [ 30.829472] ? get_unmapped_area+0x1f5/0x3f0 [ 30.830048] do_mmap+0x854/0xf00 [ 30.830486] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.830993] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.831558] ksys_mmap_pgoff+0x3af/0x500 [ 30.832068] do_syscall_64+0x3f/0x90 [ 30.832546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833205] RIP: 0033:0x7fbfba709d82 [ 30.833665] 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 [ 30.835858] RSP: 002b:00007fff10512278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.836765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfba709d82 [ 30.837614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfb9b43000 [ 30.838470] RBP: 00007fbfb9b43000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839333] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d29a4c3b20 [ 30.840176] R13: 00007fff10512290 R14: 00007fff105122c0 R15: 00007fff10512620 [ 30.841040] [ 30.841340] [ 30.841556] Allocated by task 213: [ 30.842001] kasan_save_stack+0x22/0x50 [ 30.842513] kasan_set_track+0x25/0x30 [ 30.843009] __kasan_slab_alloc+0x59/0x70 [ 30.843523] kmem_cache_alloc+0x16b/0x370 [ 30.844029] vm_area_dup+0x20/0x160 [ 30.844490] __split_vma+0x170/0x950 [ 30.844954] split_vma+0xc6/0x110 [ 30.845391] mprotect_fixup+0x8d2/0xb30 [ 30.845900] do_mprotect_pkey+0x87e/0xd40 [ 30.846452] __x64_sys_mprotect+0x78/0xc0 [ 30.846979] do_syscall_64+0x3f/0x90 [ 30.847464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848129] [ 30.848349] Freed by task 213: [ 30.848755] kasan_save_stack+0x22/0x50 [ 30.849268] kasan_set_track+0x25/0x30 [ 30.849778] kasan_save_free_info+0x2b/0x50 [ 30.850335] __kasan_slab_free+0x10a/0x190 [ 30.850897] kmem_cache_free+0x10d/0x4d0 [ 30.851424] rcu_core+0x8c8/0x2860 [ 30.851890] __do_softirq+0x1b7/0x7d4 [ 30.852391] [ 30.852611] Last potentially related work creation: [ 30.853208] kasan_save_stack+0x22/0x50 [ 30.853738] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855021] remove_vma+0x139/0x170 [ 30.855477] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856051] do_vmi_munmap+0x1f1/0x2b0 [ 30.856556] __vm_munmap+0x138/0x3a0 [ 30.857055] __x64_sys_munmap+0x59/0x80 [ 30.857571] do_syscall_64+0x3f/0x90 [ 30.858090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858774] [ 30.858992] The buggy address belongs to the object at ffff888019e8f9f8 [ 30.858992] which belongs to the cache vm_area_struct of size 168 [ 30.860529] The buggy address is located 88 bytes inside of [ 30.860529] freed 168-byte region [ffff888019e8f9f8, ffff888019e8faa0) [ 30.862001] [ 30.862228] The buggy address belongs to the physical page: [ 30.862921] page:00000000eeb83198 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e8f [ 30.864087] memcg:ffff88800fde0901 [ 30.864530] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.865213] page_type: 0xffffffff() [ 30.865684] raw: 0100000000000200 ffff8880087a0c80 ffffea000067a200 000000000000000a [ 30.866736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fde0901 [ 30.867693] page dumped because: kasan: bad access detected [ 30.868395] [ 30.868621] Memory state around the buggy address: [ 30.869220] ffff888019e8f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.870116] ffff888019e8f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.871023] >ffff888019e8fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.871907] ^ [ 30.872652] ffff888019e8fa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.873559] ffff888019e8fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.874460] ================================================================== [ 30.875500] Disabling lock debugging due to kernel taint [ 32.975439] BUG: Bad rss-counter state mm:00000000b7bed989 type:MM_FILEPAGES val:33 [ 32.976765] BUG: Bad rss-counter state mm:00000000b7bed989 type:MM_ANONPAGES val:22 [ 33.495948] BUG: Bad rss-counter state mm:00000000f063ceaf type:MM_FILEPAGES val:33 [ 33.497292] BUG: Bad rss-counter state mm:00000000f063ceaf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51272' (ECDSA) to the list of known hosts. 2023/06/21 10:15:44 fuzzer started 2023/06/21 10:15:45 dialing manager at localhost:36067 2023/06/21 10:15:45 checking machine... 2023/06/21 10:15:45 checking revisions... [ 34.250632] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:15:45 testing simple program... [ 34.293728] cgroup: Unknown subsys name 'net' [ 34.338605] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:15:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135e RSI=ffff88806ce09b30 RDI=ffffffff813ad720 RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888014455670 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 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=00007f5521465eb0 CR3=000000000c8a0000 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=9685aea98f72deae3e497c2a85ccbc5a XMM02=000000000011a198eff9b2d0a8fce9cb XMM03=000000000011a2682c67c8bc2e329bc3 XMM04=fa26caa74605460700000000000ae988 XMM05=19e9129bd510f23500000000001314e8 XMM06=4fda316b135da52b0000000000131370 XMM07=e042d86d42eb936e0000000000121928 XMM08=772ec4898e977410000000000011a268 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bcbb63 RBX=ffffffff85e5db1c RCX=ffffffff81eeeee7 RDX=0000000000000000 RSI=ffffffff861c86ee RDI=ffffffff85e5db08 RBP=ffffffff85e5db08 RSP=ffff888018e578c0 R8 =ffffffff861c86ee R9 =ffff888018e579b8 R10=0000000000038001 R11=0000000000038c51 R12=ffffffff85e5db34 R13=ffffffff85e5db08 R14=ffffffff85e5db08 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f8c52638900 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=00007fff3c987000 CR3=000000000cafa000 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=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