syzkaller login: [ 30.069453] BUG: Bad rss-counter state mm:000000004062ffd8 type:MM_FILEPAGES val:33 [ 30.070691] BUG: Bad rss-counter state mm:000000004062ffd8 type:MM_ANONPAGES val:22 [ 30.238653] ================================================================== [ 30.239562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.240505] Read of size 8 at addr ffff88800cd454e0 by task sshd/219 [ 30.241388] [ 30.241610] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.242481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.243469] Call Trace: [ 30.243792] [ 30.244088] dump_stack_lvl+0x91/0xf0 [ 30.244587] print_report+0xcc/0x620 [ 30.245071] ? __virt_addr_valid+0x102/0x340 [ 30.245619] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.246279] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.246909] kasan_report+0xbe/0xf0 [ 30.247387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.248012] vma_interval_tree_remove+0xc75/0xec0 [ 30.248617] vma_prepare+0xc54/0x11a0 [ 30.249103] __split_vma+0x5af/0x950 [ 30.249581] ? __pfx___split_vma+0x10/0x10 [ 30.250121] ? find_held_lock+0x2c/0x110 [ 30.250644] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.251220] ? lock_is_held_type+0x9f/0x120 [ 30.251768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.252379] ? mtree_range_walk+0x632/0x900 [ 30.252941] ? mas_walk+0x5c7/0x7c0 [ 30.253420] do_vmi_munmap+0x1f1/0x2b0 [ 30.253933] mmap_region+0x1f9/0x2660 [ 30.254427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.254943] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.255661] ? __pfx_lock_acquire+0x10/0x10 [ 30.256203] ? __pfx_mmap_region+0x10/0x10 [ 30.256738] ? security_mmap_addr+0x7d/0xa0 [ 30.257275] ? get_unmapped_area+0x1f5/0x3f0 [ 30.257845] do_mmap+0x854/0xf00 [ 30.258288] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.258790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.259353] ksys_mmap_pgoff+0x3af/0x500 [ 30.259861] do_syscall_64+0x3f/0x90 [ 30.260344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.260989] RIP: 0033:0x7efd50102d82 [ 30.261448] 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 [ 30.263582] RSP: 002b:00007ffd6d7364a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.264496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd50102d82 [ 30.265338] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd4f53c000 [ 30.266196] RBP: 00007efd4f53c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.267061] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfd0058d90 [ 30.267909] R13: 00007ffd6d7364c0 R14: 00007ffd6d7364f0 R15: 00007ffd6d736850 [ 30.268762] [ 30.269056] [ 30.269275] Allocated by task 212: [ 30.269708] kasan_save_stack+0x22/0x50 [ 30.270234] kasan_set_track+0x25/0x30 [ 30.270738] __kasan_slab_alloc+0x59/0x70 [ 30.271257] kmem_cache_alloc+0x16b/0x370 [ 30.271787] vm_area_dup+0x20/0x160 [ 30.272239] __split_vma+0x170/0x950 [ 30.272706] split_vma+0xc6/0x110 [ 30.273146] mprotect_fixup+0x8d2/0xb30 [ 30.273651] do_mprotect_pkey+0x87e/0xd40 [ 30.274189] __x64_sys_mprotect+0x78/0xc0 [ 30.274711] do_syscall_64+0x3f/0x90 [ 30.275183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.275838] [ 30.276053] Freed by task 212: [ 30.276448] kasan_save_stack+0x22/0x50 [ 30.276961] kasan_set_track+0x25/0x30 [ 30.277458] kasan_save_free_info+0x2b/0x50 [ 30.278029] __kasan_slab_free+0x10a/0x190 [ 30.278563] kmem_cache_free+0x10d/0x4d0 [ 30.279075] rcu_core+0x8c8/0x2860 [ 30.279524] __do_softirq+0x1b7/0x7d4 [ 30.280003] [ 30.280216] Last potentially related work creation: [ 30.280814] kasan_save_stack+0x22/0x50 [ 30.281318] __kasan_record_aux_stack+0x8e/0xa0 [ 30.281909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.282554] remove_vma+0x139/0x170 [ 30.283002] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.283557] do_vmi_munmap+0x1f1/0x2b0 [ 30.284042] __vm_munmap+0x138/0x3a0 [ 30.284513] __x64_sys_munmap+0x59/0x80 [ 30.285009] do_syscall_64+0x3f/0x90 [ 30.285489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286140] [ 30.286358] Second to last potentially related work creation: [ 30.287046] kasan_save_stack+0x22/0x50 [ 30.287555] __kasan_record_aux_stack+0x8e/0xa0 [ 30.288138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.288781] remove_vma+0x139/0x170 [ 30.289239] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.289812] do_vmi_munmap+0x1f1/0x2b0 [ 30.290311] mmap_region+0x1f9/0x2660 [ 30.290791] do_mmap+0x854/0xf00 [ 30.291222] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.291721] ksys_mmap_pgoff+0x3af/0x500 [ 30.292221] do_syscall_64+0x3f/0x90 [ 30.292703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.293353] [ 30.293569] The buggy address belongs to the object at ffff88800cd45488 [ 30.293569] which belongs to the cache vm_area_struct of size 168 [ 30.295064] The buggy address is located 88 bytes inside of [ 30.295064] freed 168-byte region [ffff88800cd45488, ffff88800cd45530) [ 30.296481] [ 30.296701] The buggy address belongs to the physical page: [ 30.297373] page:000000004de2cf59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd45 [ 30.298492] memcg:ffff88800e14bc01 [ 30.298927] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.299579] page_type: 0xffffffff() [ 30.300036] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356fc0 dead000000000006 [ 30.300959] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e14bc01 [ 30.301885] page dumped because: kasan: bad access detected [ 30.302560] [ 30.302775] Memory state around the buggy address: [ 30.303352] ffff88800cd45380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.304216] ffff88800cd45400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.305072] >ffff88800cd45480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.305954] ^ [ 30.306716] ffff88800cd45500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.307598] ffff88800cd45580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.308456] ================================================================== [ 30.309856] Disabling lock debugging due to kernel taint [ 32.051935] BUG: Bad rss-counter state mm:00000000153d06b0 type:MM_FILEPAGES val:33 [ 32.052624] BUG: Bad rss-counter state mm:00000000153d06b0 type:MM_ANONPAGES val:22 [ 32.463558] BUG: Bad rss-counter state mm:0000000022f55629 type:MM_FILEPAGES val:33 [ 32.464670] BUG: Bad rss-counter state mm:0000000022f55629 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18432' (ECDSA) to the list of known hosts. 2023/06/21 08:25:52 fuzzer started 2023/06/21 08:25:52 dialing manager at localhost:36067 2023/06/21 08:25:52 checking machine... 2023/06/21 08:25:52 checking revisions... [ 33.198878] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:25:52 testing simple program... [ 33.247925] cgroup: Unknown subsys name 'net' [ 33.289277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:25:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000008 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b580 RBP=ffff88800c520000 RSP=ffff88801c9a7e30 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800e62d180 R11=00000000000b6a61 R12=ffff88800e62d180 R13=ffff88801ac1a280 R14=1ffff11003934fd1 R15=dffffc0000000000 RIP=ffffffff812d8e70 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 00007f161975c900 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=00007f1619d140b0 CR3=0000000019a40000 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=2032353a35323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fa3cb9141c0 CR3=000000000d5a4000 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=c28f94de4b5258b6fc4f15e5e9eed72b XMM02=000000000011d550ec2efd57dc4c00df XMM03=0000000000123a50eae6f985842fab63 XMM04=1598ff4b1b1be1d700000000000ae988 XMM05=9d7f14c35e477c580000000000135300 XMM06=806171799158d96700000000001343a0 XMM07=e042d86d42eb936e0000000000123cd0 XMM08=eae6f985842fab63000000000011d5b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000