syzkaller login: [ 38.791373] BUG: Bad rss-counter state mm:0000000008db2fe9 type:MM_FILEPAGES val:33 [ 38.792651] BUG: Bad rss-counter state mm:0000000008db2fe9 type:MM_ANONPAGES val:22 [ 38.833231] ================================================================== [ 38.834371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.835635] Read of size 8 at addr ffff88800d09db38 by task sshd/219 [ 38.836596] [ 38.836886] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.837969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.839183] Call Trace: [ 38.839587] [ 38.839942] dump_stack_lvl+0x91/0xf0 [ 38.840550] print_report+0xcc/0x620 [ 38.841186] ? __virt_addr_valid+0x102/0x340 [ 38.841831] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.842441] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843054] kasan_report+0xbe/0xf0 [ 38.843518] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.844126] vma_interval_tree_remove+0xc75/0xec0 [ 38.844717] vma_prepare+0xc54/0x11a0 [ 38.845206] __split_vma+0x5af/0x950 [ 38.845668] ? __pfx___split_vma+0x10/0x10 [ 38.846201] ? find_held_lock+0x2c/0x110 [ 38.846709] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.847270] ? lock_is_held_type+0x9f/0x120 [ 38.847800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.848403] ? mtree_range_walk+0x632/0x900 [ 38.848958] ? mas_walk+0x5c7/0x7c0 [ 38.849436] do_vmi_munmap+0x1f1/0x2b0 [ 38.849925] mmap_region+0x1f9/0x2660 [ 38.850401] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.850898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.851610] ? __pfx_lock_acquire+0x10/0x10 [ 38.852140] ? __pfx_mmap_region+0x10/0x10 [ 38.852666] ? security_mmap_addr+0x7d/0xa0 [ 38.853213] ? get_unmapped_area+0x1f5/0x3f0 [ 38.853756] do_mmap+0x854/0xf00 [ 38.854189] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.854688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.855247] ksys_mmap_pgoff+0x3af/0x500 [ 38.855744] do_syscall_64+0x3f/0x90 [ 38.856215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.856863] RIP: 0033:0x7f47f15d5d82 [ 38.857324] 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 [ 38.859423] RSP: 002b:00007ffc976ff298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.860325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47f15d5d82 [ 38.861185] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47f0a0f000 [ 38.862024] RBP: 00007f47f0a0f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.862875] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564573680d90 [ 38.863707] R13: 00007ffc976ff2b0 R14: 00007ffc976ff2e0 R15: 00007ffc976ff640 [ 38.864562] [ 38.864856] [ 38.865081] Allocated by task 212: [ 38.865501] kasan_save_stack+0x22/0x50 [ 38.866005] kasan_set_track+0x25/0x30 [ 38.866494] __kasan_slab_alloc+0x59/0x70 [ 38.867014] kmem_cache_alloc+0x16b/0x370 [ 38.867521] vm_area_dup+0x20/0x160 [ 38.867965] __split_vma+0x170/0x950 [ 38.868427] split_vma+0xc6/0x110 [ 38.868868] mprotect_fixup+0x8d2/0xb30 [ 38.869388] do_mprotect_pkey+0x87e/0xd40 [ 38.869898] __x64_sys_mprotect+0x78/0xc0 [ 38.870419] do_syscall_64+0x3f/0x90 [ 38.870898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871535] [ 38.871747] Freed by task 212: [ 38.872140] kasan_save_stack+0x22/0x50 [ 38.872639] kasan_set_track+0x25/0x30 [ 38.873127] kasan_save_free_info+0x2b/0x50 [ 38.873654] __kasan_slab_free+0x10a/0x190 [ 38.874188] kmem_cache_free+0x10d/0x4d0 [ 38.874700] rcu_core+0x8c8/0x2860 [ 38.875145] __do_softirq+0x1b7/0x7d4 [ 38.875620] [ 38.875834] Last potentially related work creation: [ 38.876426] kasan_save_stack+0x22/0x50 [ 38.876926] __kasan_record_aux_stack+0x8e/0xa0 [ 38.877491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.878135] remove_vma+0x139/0x170 [ 38.878582] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.879133] do_vmi_munmap+0x1f1/0x2b0 [ 38.879622] __vm_munmap+0x138/0x3a0 [ 38.880087] __x64_sys_munmap+0x59/0x80 [ 38.880569] do_syscall_64+0x3f/0x90 [ 38.881058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881695] [ 38.881905] Second to last potentially related work creation: [ 38.882592] kasan_save_stack+0x22/0x50 [ 38.883095] __kasan_record_aux_stack+0x8e/0xa0 [ 38.883663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.884300] remove_vma+0x139/0x170 [ 38.884747] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.885316] do_vmi_munmap+0x1f1/0x2b0 [ 38.885794] mmap_region+0x1f9/0x2660 [ 38.886261] do_mmap+0x854/0xf00 [ 38.886683] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.887170] ksys_mmap_pgoff+0x3af/0x500 [ 38.887661] do_syscall_64+0x3f/0x90 [ 38.888130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.888785] [ 38.889013] The buggy address belongs to the object at ffff88800d09dae0 [ 38.889013] which belongs to the cache vm_area_struct of size 168 [ 38.890480] The buggy address is located 88 bytes inside of [ 38.890480] freed 168-byte region [ffff88800d09dae0, ffff88800d09db88) [ 38.891885] [ 38.892099] The buggy address belongs to the physical page: [ 38.892742] page:0000000071dcb3de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd09d [ 38.893840] memcg:ffff88800d3f4b01 [ 38.894267] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.894971] page_type: 0xffffffff() [ 38.895423] raw: 0100000000000200 ffff8880087a0c80 ffffea0000371fc0 dead000000000003 [ 38.896350] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3f4b01 [ 38.897278] page dumped because: kasan: bad access detected [ 38.897933] [ 38.898149] Memory state around the buggy address: [ 38.898725] ffff88800d09da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.899570] ffff88800d09da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.900407] >ffff88800d09db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.901265] ^ [ 38.901872] ffff88800d09db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.902730] ffff88800d09dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.903575] ================================================================== [ 38.904545] Disabling lock debugging due to kernel taint [ 41.263817] BUG: Bad rss-counter state mm:000000002e087014 type:MM_FILEPAGES val:33 [ 41.264998] BUG: Bad rss-counter state mm:000000002e087014 type:MM_ANONPAGES val:22 [ 41.647061] BUG: Bad rss-counter state mm:0000000013a75361 type:MM_FILEPAGES val:33 [ 41.648356] BUG: Bad rss-counter state mm:0000000013a75361 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16962' (ECDSA) to the list of known hosts. 2023/06/20 16:03:22 fuzzer started 2023/06/20 16:03:22 dialing manager at localhost:36067 2023/06/20 16:03:22 checking machine... 2023/06/20 16:03:22 checking revisions... [ 42.357323] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:03:22 testing simple program... [ 42.402097] cgroup: Unknown subsys name 'net' [ 42.441557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:03:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001df0f0f RCX=0000000000000000 RDX=ffff888015a49b40 RSI=ffffffff819678c3 RDI=ffff88800ef87898 RBP=0000000000000000 RSP=ffff88800ef87878 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffffffff854ee9e0 R14=ffff888016066a90 R15=ffff888015a49b40 RIP=ffffffff819678e5 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 00007fd9c08bb900 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=00007fd9c0e70650 CR3=000000000c48a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007ffe52f9d448 CR3=000000000e516000 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=2032323a33303a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a33303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000