syzkaller login: [ 29.062194] BUG: Bad rss-counter state mm:00000000a4df1e1a type:MM_FILEPAGES val:33 [ 29.063618] BUG: Bad rss-counter state mm:00000000a4df1e1a type:MM_ANONPAGES val:22 [ 29.250828] ================================================================== [ 29.251883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.252970] Read of size 8 at addr ffff88800dcb9ed8 by task sshd/222 [ 29.253956] [ 29.254197] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.255166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.256249] Call Trace: [ 29.256599] [ 29.256914] dump_stack_lvl+0x91/0xf0 [ 29.257457] print_report+0xcc/0x620 [ 29.257989] ? __virt_addr_valid+0x102/0x340 [ 29.258625] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.259306] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.259977] kasan_report+0xbe/0xf0 [ 29.260490] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.261161] vma_interval_tree_remove+0xc75/0xec0 [ 29.261811] vma_prepare+0xc54/0x11a0 [ 29.262329] __split_vma+0x5af/0x950 [ 29.262845] ? __pfx___split_vma+0x10/0x10 [ 29.263407] ? find_held_lock+0x2c/0x110 [ 29.263967] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.264573] ? lock_is_held_type+0x9f/0x120 [ 29.265149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.265798] ? mtree_range_walk+0x632/0x900 [ 29.266397] ? mas_walk+0x5c7/0x7c0 [ 29.266914] do_vmi_munmap+0x1f1/0x2b0 [ 29.267441] mmap_region+0x1f9/0x2660 [ 29.267958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.268506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.269269] ? __pfx_lock_acquire+0x10/0x10 [ 29.269840] ? __pfx_mmap_region+0x10/0x10 [ 29.270404] ? security_mmap_addr+0x7d/0xa0 [ 29.270990] ? get_unmapped_area+0x1f5/0x3f0 [ 29.271604] do_mmap+0x854/0xf00 [ 29.272089] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.272641] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.273264] ksys_mmap_pgoff+0x3af/0x500 [ 29.273832] do_syscall_64+0x3f/0x90 [ 29.274364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.275078] RIP: 0033:0x7fcde13d1d82 [ 29.275581] 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 [ 29.277942] RSP: 002b:00007ffcaca655b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.278983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcde13d1d82 [ 29.279920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcde080b000 [ 29.280864] RBP: 00007fcde080b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.281805] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564523178d90 [ 29.282761] R13: 00007ffcaca655d0 R14: 00007ffcaca65600 R15: 00007ffcaca65960 [ 29.283718] [ 29.284030] [ 29.284262] Allocated by task 212: [ 29.284720] kasan_save_stack+0x22/0x50 [ 29.285265] kasan_set_track+0x25/0x30 [ 29.285796] __kasan_slab_alloc+0x59/0x70 [ 29.286356] kmem_cache_alloc+0x16b/0x370 [ 29.286910] vm_area_dup+0x20/0x160 [ 29.287396] __split_vma+0x170/0x950 [ 29.287898] split_vma+0xc6/0x110 [ 29.288366] mprotect_fixup+0x8d2/0xb30 [ 29.288897] do_mprotect_pkey+0x87e/0xd40 [ 29.289449] __x64_sys_mprotect+0x78/0xc0 [ 29.290008] do_syscall_64+0x3f/0x90 [ 29.290512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.291213] [ 29.291444] Freed by task 212: [ 29.291866] kasan_save_stack+0x22/0x50 [ 29.292404] kasan_set_track+0x25/0x30 [ 29.292931] kasan_save_free_info+0x2b/0x50 [ 29.293497] __kasan_slab_free+0x10a/0x190 [ 29.294069] kmem_cache_free+0x10d/0x4d0 [ 29.294615] rcu_core+0x8c8/0x2860 [ 29.295088] __do_softirq+0x1b7/0x7d4 [ 29.295604] [ 29.295833] Last potentially related work creation: [ 29.296454] kasan_save_stack+0x22/0x50 [ 29.296986] __kasan_record_aux_stack+0x8e/0xa0 [ 29.297602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.298284] remove_vma+0x139/0x170 [ 29.298782] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.299371] do_vmi_munmap+0x1f1/0x2b0 [ 29.299889] __vm_munmap+0x138/0x3a0 [ 29.300392] __x64_sys_munmap+0x59/0x80 [ 29.300919] do_syscall_64+0x3f/0x90 [ 29.301427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.302109] [ 29.302338] The buggy address belongs to the object at ffff88800dcb9e80 [ 29.302338] which belongs to the cache vm_area_struct of size 168 [ 29.303915] The buggy address is located 88 bytes inside of [ 29.303915] freed 168-byte region [ffff88800dcb9e80, ffff88800dcb9f28) [ 29.305420] [ 29.305649] The buggy address belongs to the physical page: [ 29.306356] page:00000000a4f04516 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcb9 [ 29.307531] memcg:ffff88800dde3d01 [ 29.307982] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.308724] page_type: 0xffffffff() [ 29.309205] raw: 0100000000000200 ffff88800879fc80 ffffea0000369600 dead000000000007 [ 29.310176] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dde3d01 [ 29.311156] page dumped because: kasan: bad access detected [ 29.311855] [ 29.312090] Memory state around the buggy address: [ 29.312717] ffff88800dcb9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.313625] ffff88800dcb9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.314534] >ffff88800dcb9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.315457] ^ [ 29.316231] ffff88800dcb9f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.317145] ffff88800dcb9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.318052] ================================================================== [ 29.319405] Disabling lock debugging due to kernel taint [ 31.665297] BUG: Bad rss-counter state mm:000000006bf60b2f type:MM_FILEPAGES val:33 [ 31.666295] BUG: Bad rss-counter state mm:000000006bf60b2f type:MM_ANONPAGES val:22 [ 32.146155] BUG: Bad rss-counter state mm:000000003af7af32 type:MM_FILEPAGES val:33 [ 32.147386] BUG: Bad rss-counter state mm:000000003af7af32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55364' (ECDSA) to the list of known hosts. 2023/06/19 14:16:41 fuzzer started 2023/06/19 14:16:41 dialing manager at localhost:44161 2023/06/19 14:16:41 checking machine... 2023/06/19 14:16:41 checking revisions... [ 32.826860] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:16:41 testing simple program... [ 32.887402] cgroup: Unknown subsys name 'net' [ 32.925162] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:16:40 Registers: info registers vcpu 0 RAX=0000000000001000 RBX=000055ad26198ed0 RCX=00007fb7047c2e8e RDX=0000000000001000 RSI=000055ad261a74b0 RDI=0000000000000008 RBP=00007fb7048944a0 RSP=00007ffd97e3e4b0 R8 =0000000000000008 R9 =00007fb704892be0 R10=0000000000000100 R11=0000000000000246 R12=00007fb7042e0900 R13=00007fb7048938a0 R14=0000000000000d68 R15=0000000000000d68 RIP=00007fb70475589d RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb7042e0900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd97e38000 CR3=000000001a1c2000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c8da RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e00 RDI=ffff88806cf09e00 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e08 R15=ffff88806cf09a98 RIP=ffffffff81131041 RFL=00000202 [-------] 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=00007f58159ac660 CR3=0000000018f4e000 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=2030343a36313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a36313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000