syzkaller login: [ 33.555343] BUG: Bad rss-counter state mm:000000009ee5c483 type:MM_FILEPAGES val:33 [ 33.556419] BUG: Bad rss-counter state mm:000000009ee5c483 type:MM_ANONPAGES val:22 [ 33.730681] ================================================================== [ 33.731783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.733039] Read of size 8 at addr ffff88800cda6880 by task sshd/221 [ 33.733805] [ 33.734026] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.734924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.735879] Call Trace: [ 33.736193] [ 33.736470] dump_stack_lvl+0x91/0xf0 [ 33.736936] print_report+0xcc/0x620 [ 33.737447] ? __virt_addr_valid+0x102/0x340 [ 33.738004] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.738621] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.739232] kasan_report+0xbe/0xf0 [ 33.739708] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.740347] vma_interval_tree_remove+0xc75/0xec0 [ 33.740948] vma_prepare+0xc54/0x11a0 [ 33.741426] __split_vma+0x5af/0x950 [ 33.741892] ? __pfx___split_vma+0x10/0x10 [ 33.742418] ? find_held_lock+0x2c/0x110 [ 33.742933] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.743499] ? lock_is_held_type+0x9f/0x120 [ 33.744029] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.744651] ? mtree_range_walk+0x632/0x900 [ 33.745196] ? mas_walk+0x5c7/0x7c0 [ 33.745682] do_vmi_munmap+0x1f1/0x2b0 [ 33.746184] mmap_region+0x1f9/0x2660 [ 33.746668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.747185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.747903] ? __pfx_lock_acquire+0x10/0x10 [ 33.748419] ? __pfx_mmap_region+0x10/0x10 [ 33.748919] ? security_mmap_addr+0x7d/0xa0 [ 33.749420] ? get_unmapped_area+0x1f5/0x3f0 [ 33.749939] do_mmap+0x854/0xf00 [ 33.750360] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.750834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.751368] ksys_mmap_pgoff+0x3af/0x500 [ 33.751853] do_syscall_64+0x3f/0x90 [ 33.752328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.752941] RIP: 0033:0x7fe5bb8b0d82 [ 33.753375] 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 [ 33.755455] RSP: 002b:00007ffd891bfe98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.756371] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5bb8b0d82 [ 33.757220] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5bacea000 [ 33.758067] RBP: 00007fe5bacea000 R08: 0000000000000009 R09: 0000000000001000 [ 33.758917] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ba2643d90 [ 33.759779] R13: 00007ffd891bfeb0 R14: 00007ffd891bfee0 R15: 00007ffd891c0240 [ 33.760658] [ 33.760948] [ 33.761158] Allocated by task 214: [ 33.761585] kasan_save_stack+0x22/0x50 [ 33.762098] kasan_set_track+0x25/0x30 [ 33.762603] __kasan_slab_alloc+0x59/0x70 [ 33.763122] kmem_cache_alloc+0x16b/0x370 [ 33.763633] vm_area_dup+0x20/0x160 [ 33.764090] __split_vma+0x170/0x950 [ 33.764566] split_vma+0xc6/0x110 [ 33.765007] mprotect_fixup+0x8d2/0xb30 [ 33.765519] do_mprotect_pkey+0x87e/0xd40 [ 33.766047] __x64_sys_mprotect+0x78/0xc0 [ 33.766569] do_syscall_64+0x3f/0x90 [ 33.767042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.767689] [ 33.767905] Freed by task 214: [ 33.768324] kasan_save_stack+0x22/0x50 [ 33.768820] kasan_set_track+0x25/0x30 [ 33.769315] kasan_save_free_info+0x2b/0x50 [ 33.769851] __kasan_slab_free+0x10a/0x190 [ 33.770386] kmem_cache_free+0x10d/0x4d0 [ 33.770889] rcu_core+0x8c8/0x2860 [ 33.771336] __do_softirq+0x1b7/0x7d4 [ 33.771804] [ 33.772020] Last potentially related work creation: [ 33.772618] kasan_save_stack+0x22/0x50 [ 33.773114] __kasan_record_aux_stack+0x8e/0xa0 [ 33.773689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.774324] remove_vma+0x139/0x170 [ 33.774772] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.775338] do_vmi_munmap+0x1f1/0x2b0 [ 33.775821] __vm_munmap+0x138/0x3a0 [ 33.776305] __x64_sys_munmap+0x59/0x80 [ 33.776795] do_syscall_64+0x3f/0x90 [ 33.777276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.777909] [ 33.778132] Second to last potentially related work creation: [ 33.778827] kasan_save_stack+0x22/0x50 [ 33.779329] __kasan_record_aux_stack+0x8e/0xa0 [ 33.779906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.780556] remove_vma+0x139/0x170 [ 33.781013] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.781573] do_vmi_munmap+0x1f1/0x2b0 [ 33.782055] mmap_region+0x1f9/0x2660 [ 33.782535] do_mmap+0x854/0xf00 [ 33.782961] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.783450] ksys_mmap_pgoff+0x3af/0x500 [ 33.783955] do_syscall_64+0x3f/0x90 [ 33.784438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.785077] [ 33.785286] The buggy address belongs to the object at ffff88800cda6828 [ 33.785286] which belongs to the cache vm_area_struct of size 168 [ 33.786754] The buggy address is located 88 bytes inside of [ 33.786754] freed 168-byte region [ffff88800cda6828, ffff88800cda68d0) [ 33.788156] [ 33.788386] The buggy address belongs to the physical page: [ 33.789042] page:0000000046f45da8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcda6 [ 33.790123] memcg:ffff88800f404701 [ 33.790567] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.791226] page_type: 0xffffffff() [ 33.791686] raw: 0100000000000200 ffff88800879fc80 ffffea0000331b80 dead000000000004 [ 33.792643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f404701 [ 33.793568] page dumped because: kasan: bad access detected [ 33.794236] [ 33.794461] Memory state around the buggy address: [ 33.795058] ffff88800cda6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.795930] ffff88800cda6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.796817] >ffff88800cda6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.797695] ^ [ 33.798114] ffff88800cda6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.798973] ffff88800cda6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 33.799835] ================================================================== [ 33.800826] Disabling lock debugging due to kernel taint [ 36.401297] BUG: Bad rss-counter state mm:00000000660b4f5a type:MM_FILEPAGES val:33 [ 36.402467] BUG: Bad rss-counter state mm:00000000660b4f5a type:MM_ANONPAGES val:22 [ 36.945312] BUG: Bad rss-counter state mm:00000000fc134143 type:MM_FILEPAGES val:33 [ 36.946346] BUG: Bad rss-counter state mm:00000000fc134143 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26599' (ECDSA) to the list of known hosts. 2023/06/19 20:17:22 fuzzer started 2023/06/19 20:17:23 dialing manager at localhost:44161 2023/06/19 20:17:23 checking machine... 2023/06/19 20:17:23 checking revisions... [ 37.689744] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:17:23 testing simple program... [ 37.747173] cgroup: Unknown subsys name 'net' [ 37.789363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:17:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d7f9d0 RSP=ffff888008d7f8b8 R8 =ffffffff8609675a R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f978 R15=ffff888008d7f978 RIP=ffffffff81131151 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 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=00007ffe45031000 CR3=0000000016dcc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000121df8 RCX=000055699d9e85f0 RDX=000055699d9ea4c0 RSI=00007ffecd600918 RDI=000055699d9e92a0 RBP=00007ffecd6009a8 RSP=00007ffecd6008e0 R8 =0000000000000001 R9 =0000000000121df8 R10=0000000000000002 R11=000000000000ebb6 R12=00007ffecd600e40 R13=0000000000000001 R14=0000000000121df8 R15=0000000000000000 RIP=00007f7828f9c350 RFL=00000202 [-------] 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 00007f7828419900 00000000 00000000 GS =0000 0000000000000000 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=00007f782787b1d0 CR3=000000000d62e000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=467dcafb60e5b13600000000000ae988 XMM05=f465dfe106da904d0000000000136c98 XMM06=c291bd5c70af25b90000000000135d38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000