syzkaller login: [ 30.618795] BUG: Bad rss-counter state mm:0000000043a87fea type:MM_FILEPAGES val:33 [ 30.619856] BUG: Bad rss-counter state mm:0000000043a87fea type:MM_ANONPAGES val:22 [ 30.803040] ================================================================== [ 30.803947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.804890] Read of size 8 at addr ffff88800e6ac310 by task sshd/220 [ 30.805654] [ 30.805878] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.806868] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.807870] Call Trace: [ 30.808193] [ 30.808478] dump_stack_lvl+0x91/0xf0 [ 30.808971] print_report+0xcc/0x620 [ 30.809472] ? __virt_addr_valid+0x102/0x340 [ 30.810025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.811265] kasan_report+0xbe/0xf0 [ 30.811742] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.812365] vma_interval_tree_remove+0xc75/0xec0 [ 30.812972] vma_prepare+0xc54/0x11a0 [ 30.813452] __split_vma+0x5af/0x950 [ 30.813931] ? __pfx___split_vma+0x10/0x10 [ 30.814490] ? find_held_lock+0x2c/0x110 [ 30.815023] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.815594] ? lock_is_held_type+0x9f/0x120 [ 30.816145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.816756] ? mtree_range_walk+0x632/0x900 [ 30.817309] ? mas_walk+0x5c7/0x7c0 [ 30.817796] do_vmi_munmap+0x1f1/0x2b0 [ 30.818294] mmap_region+0x1f9/0x2660 [ 30.818778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.819293] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.820008] ? __pfx_lock_acquire+0x10/0x10 [ 30.820547] ? __pfx_mmap_region+0x10/0x10 [ 30.821083] ? security_mmap_addr+0x7d/0xa0 [ 30.821617] ? get_unmapped_area+0x1f5/0x3f0 [ 30.822174] do_mmap+0x854/0xf00 [ 30.822625] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.823127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.823692] ksys_mmap_pgoff+0x3af/0x500 [ 30.824208] do_syscall_64+0x3f/0x90 [ 30.824686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825330] RIP: 0033:0x7ff6db224d82 [ 30.825797] 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 [ 30.827979] RSP: 002b:00007ffe4d8a0b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.828889] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6db224d82 [ 30.829760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6da65e000 [ 30.830621] RBP: 00007ff6da65e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.831477] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629d7491ec0 [ 30.832343] R13: 00007ffe4d8a0b40 R14: 00007ffe4d8a0b70 R15: 00007ffe4d8a0ed0 [ 30.833204] [ 30.833500] [ 30.833720] Allocated by task 213: [ 30.834156] kasan_save_stack+0x22/0x50 [ 30.834674] kasan_set_track+0x25/0x30 [ 30.835170] __kasan_slab_alloc+0x59/0x70 [ 30.835695] kmem_cache_alloc+0x16b/0x370 [ 30.836213] vm_area_dup+0x20/0x160 [ 30.836686] __split_vma+0x170/0x950 [ 30.837154] split_vma+0xc6/0x110 [ 30.837593] mprotect_fixup+0x8d2/0xb30 [ 30.838101] do_mprotect_pkey+0x87e/0xd40 [ 30.838629] __x64_sys_mprotect+0x78/0xc0 [ 30.839160] do_syscall_64+0x3f/0x90 [ 30.839648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840302] [ 30.840518] Freed by task 213: [ 30.840916] kasan_save_stack+0x22/0x50 [ 30.841424] kasan_set_track+0x25/0x30 [ 30.841923] kasan_save_free_info+0x2b/0x50 [ 30.842476] __kasan_slab_free+0x10a/0x190 [ 30.843016] kmem_cache_free+0x10d/0x4d0 [ 30.843528] rcu_core+0x8c8/0x2860 [ 30.843972] __do_softirq+0x1b7/0x7d4 [ 30.844456] [ 30.844671] Last potentially related work creation: [ 30.845275] kasan_save_stack+0x22/0x50 [ 30.845777] __kasan_record_aux_stack+0x8e/0xa0 [ 30.846386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.847033] remove_vma+0x139/0x170 [ 30.847491] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.848145] do_vmi_munmap+0x1f1/0x2b0 [ 30.848646] __vm_munmap+0x138/0x3a0 [ 30.849124] __x64_sys_munmap+0x59/0x80 [ 30.849618] do_syscall_64+0x3f/0x90 [ 30.850093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850755] [ 30.850969] Second to last potentially related work creation: [ 30.851663] kasan_save_stack+0x22/0x50 [ 30.852175] __kasan_record_aux_stack+0x8e/0xa0 [ 30.852757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.853404] remove_vma+0x139/0x170 [ 30.853863] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.854437] do_vmi_munmap+0x1f1/0x2b0 [ 30.854927] mmap_region+0x1f9/0x2660 [ 30.855404] do_mmap+0x854/0xf00 [ 30.855848] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.856336] ksys_mmap_pgoff+0x7d/0x500 [ 30.856828] do_syscall_64+0x3f/0x90 [ 30.857308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857957] [ 30.858175] The buggy address belongs to the object at ffff88800e6ac2b8 [ 30.858175] which belongs to the cache vm_area_struct of size 168 [ 30.859663] The buggy address is located 88 bytes inside of [ 30.859663] freed 168-byte region [ffff88800e6ac2b8, ffff88800e6ac360) [ 30.861092] [ 30.861309] The buggy address belongs to the physical page: [ 30.861986] page:00000000d7468f06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ac [ 30.863094] memcg:ffff88800dbdd301 [ 30.863523] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.864176] page_type: 0xffffffff() [ 30.864628] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a56c0 dead000000000008 [ 30.865568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbdd301 [ 30.866494] page dumped because: kasan: bad access detected [ 30.867153] [ 30.867372] Memory state around the buggy address: [ 30.867960] ffff88800e6ac200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.868828] ffff88800e6ac280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.869689] >ffff88800e6ac300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.870561] ^ [ 30.871035] ffff88800e6ac380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.871897] ffff88800e6ac400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.872770] ================================================================== [ 30.873711] Disabling lock debugging due to kernel taint [ 32.899695] BUG: Bad rss-counter state mm:00000000085f791e type:MM_FILEPAGES val:33 [ 32.901332] BUG: Bad rss-counter state mm:00000000085f791e type:MM_ANONPAGES val:22 [ 33.405145] BUG: Bad rss-counter state mm:000000000f3d8f72 type:MM_FILEPAGES val:33 [ 33.406540] BUG: Bad rss-counter state mm:000000000f3d8f72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45656' (ECDSA) to the list of known hosts. 2023/06/20 17:46:02 fuzzer started 2023/06/20 17:46:02 dialing manager at localhost:36067 2023/06/20 17:46:02 checking machine... 2023/06/20 17:46:02 checking revisions... [ 34.115277] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:46:02 testing simple program... [ 34.163739] cgroup: Unknown subsys name 'net' [ 34.212277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800f9b3488 RCX=ffffffff8145226b RDX=ffff888017da1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888016597ce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880198ea000 R13=ffff888017da1b40 R14=ffff888018568000 R15=0000000000000000 RIP=ffffffff814c086b 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 00007f95eec5e900 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=00007f95ef2160b0 CR3=0000000017f18000 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=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 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=00007fcf17e17de0 CR3=0000000016b6e000 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=2031303a36343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000