syzkaller login: [ 31.103914] BUG: Bad rss-counter state mm:00000000c7fc19dd type:MM_FILEPAGES val:33 [ 31.105154] BUG: Bad rss-counter state mm:00000000c7fc19dd type:MM_ANONPAGES val:22 [ 31.142990] ================================================================== [ 31.143980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.144977] Read of size 8 at addr ffff888016b5ca50 by task sshd/220 [ 31.145738] [ 31.145958] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.146830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.148062] Call Trace: [ 31.148458] <TASK> [ 31.148812] dump_stack_lvl+0x91/0xf0 [ 31.149412] print_report+0xcc/0x620 [ 31.150001] ? __virt_addr_valid+0x102/0x340 [ 31.150702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.151468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.152229] kasan_report+0xbe/0xf0 [ 31.152807] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.153571] vma_interval_tree_remove+0xc75/0xec0 [ 31.154307] vma_prepare+0xc54/0x11a0 [ 31.154922] __split_vma+0x5af/0x950 [ 31.155526] ? __pfx___split_vma+0x10/0x10 [ 31.156045] ? find_held_lock+0x2c/0x110 [ 31.156552] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.157099] ? lock_is_held_type+0x9f/0x120 [ 31.157620] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.158218] ? mtree_range_walk+0x632/0x900 [ 31.158770] ? mas_walk+0x5c7/0x7c0 [ 31.159235] do_vmi_munmap+0x1f1/0x2b0 [ 31.159715] mmap_region+0x1f9/0x2660 [ 31.160189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.160684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.161382] ? __pfx_lock_acquire+0x10/0x10 [ 31.161907] ? __pfx_mmap_region+0x10/0x10 [ 31.162428] ? security_mmap_addr+0x7d/0xa0 [ 31.162974] ? get_unmapped_area+0x1f5/0x3f0 [ 31.163527] do_mmap+0x854/0xf00 [ 31.163962] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.164449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.165006] ksys_mmap_pgoff+0x3af/0x500 [ 31.165507] do_syscall_64+0x3f/0x90 [ 31.165980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.166635] RIP: 0033:0x7f985e6ccd82 [ 31.167086] 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 [ 31.169153] RSP: 002b:00007ffe8b012af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.170040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f985e6ccd82 [ 31.170877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f985db06000 [ 31.171710] RBP: 00007f985db06000 R08: 0000000000000009 R09: 0000000000001000 [ 31.172544] R10: 0000000000000812 R11: 0000000000000206 R12: 000056338ab72ec0 [ 31.173380] R13: 00007ffe8b012b10 R14: 00007ffe8b012b40 R15: 00007ffe8b012ea0 [ 31.174219] </TASK> [ 31.174508] [ 31.174737] Allocated by task 213: [ 31.175163] kasan_save_stack+0x22/0x50 [ 31.175662] kasan_set_track+0x25/0x30 [ 31.176148] __kasan_slab_alloc+0x59/0x70 [ 31.176665] kmem_cache_alloc+0x16b/0x370 [ 31.177177] vm_area_dup+0x20/0x160 [ 31.177626] __split_vma+0x170/0x950 [ 31.178088] split_vma+0xc6/0x110 [ 31.178523] mprotect_fixup+0x8d2/0xb30 [ 31.179026] do_mprotect_pkey+0x87e/0xd40 [ 31.179544] __x64_sys_mprotect+0x78/0xc0 [ 31.180057] do_syscall_64+0x3f/0x90 [ 31.180527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181164] [ 31.181380] Freed by task 213: [ 31.181766] kasan_save_stack+0x22/0x50 [ 31.182263] kasan_set_track+0x25/0x30 [ 31.182751] kasan_save_free_info+0x2b/0x50 [ 31.183280] __kasan_slab_free+0x10a/0x190 [ 31.183810] kmem_cache_free+0x10d/0x4d0 [ 31.184307] rcu_core+0x8c8/0x2860 [ 31.184746] __do_softirq+0x1b7/0x7d4 [ 31.185225] [ 31.185440] Last potentially related work creation: [ 31.186017] kasan_save_stack+0x22/0x50 [ 31.186523] __kasan_record_aux_stack+0x8e/0xa0 [ 31.187110] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.187742] remove_vma+0x139/0x170 [ 31.188189] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.188744] do_vmi_munmap+0x1f1/0x2b0 [ 31.189230] __vm_munmap+0x138/0x3a0 [ 31.189695] __x64_sys_munmap+0x59/0x80 [ 31.190185] do_syscall_64+0x3f/0x90 [ 31.190661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191297] [ 31.191509] The buggy address belongs to the object at ffff888016b5c9f8 [ 31.191509] which belongs to the cache vm_area_struct of size 168 [ 31.192961] The buggy address is located 88 bytes inside of [ 31.192961] freed 168-byte region [ffff888016b5c9f8, ffff888016b5caa0) [ 31.194346] [ 31.194562] The buggy address belongs to the physical page: [ 31.195228] page:00000000493ba924 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b5c [ 31.196319] memcg:ffff88801bc74501 [ 31.196743] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.197383] page_type: 0xffffffff() [ 31.197827] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.198738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc74501 [ 31.199632] page dumped because: kasan: bad access detected [ 31.200289] [ 31.200504] Memory state around the buggy address: [ 31.201076] ffff888016b5c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.201917] ffff888016b5c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.202815] >ffff888016b5ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.203653] ^ [ 31.204342] ffff888016b5ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.205175] ffff888016b5cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.206011] ================================================================== [ 31.207158] Disabling lock debugging due to kernel taint [ 33.317260] BUG: Bad rss-counter state mm:000000009acb9ef7 type:MM_FILEPAGES val:33 [ 33.318270] BUG: Bad rss-counter state mm:000000009acb9ef7 type:MM_ANONPAGES val:22 [ 33.877078] BUG: Bad rss-counter state mm:00000000e01c9640 type:MM_FILEPAGES val:33 [ 33.878227] BUG: Bad rss-counter state mm:00000000e01c9640 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21772' (ECDSA) to the list of known hosts. 2023/06/21 00:46:41 fuzzer started 2023/06/21 00:46:42 dialing manager at localhost:36067 2023/06/21 00:46:42 checking machine... 2023/06/21 00:46:42 checking revisions... [ 34.490107] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:46:42 testing simple program... [ 34.547687] cgroup: Unknown subsys name 'net' [ 34.584646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:46:41 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=0000000000000000 RCX=0000000080000101 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffffffff8542aab4 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88801659c1b0 RIP=ffffffff814c0871 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 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=00007f6ec59957b0 CR3=000000000c6e4000 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=2031343a36343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a36343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88806cf3e0d0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8180a86b RBP=ffff8880084c6140 RSP=ffff8880168b73d0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000282 R12=ffff888019e56a10 R13=0000000000000009 R14=0000000000000200 R15=ffff88806cf3e0f0 RIP=ffffffff84511936 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 00007f6e8a1ca900 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=00007f6e8a1a9020 CR3=0000000015e14000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000