syzkaller login: [ 30.802986] BUG: Bad rss-counter state mm:00000000b8310234 type:MM_FILEPAGES val:33 [ 30.804010] BUG: Bad rss-counter state mm:00000000b8310234 type:MM_ANONPAGES val:22 [ 30.967778] ================================================================== [ 30.968679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.969616] Read of size 8 at addr ffff88800eebaed8 by task sshd/220 [ 30.970380] [ 30.970597] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.971554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.972531] Call Trace: [ 30.972852] [ 30.973136] dump_stack_lvl+0x91/0xf0 [ 30.973648] print_report+0xcc/0x620 [ 30.974132] ? __virt_addr_valid+0x102/0x340 [ 30.974678] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.975291] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.975930] kasan_report+0xbe/0xf0 [ 30.976404] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.977020] vma_interval_tree_remove+0xc75/0xec0 [ 30.977628] vma_prepare+0xc54/0x11a0 [ 30.978112] __split_vma+0x5af/0x950 [ 30.978586] ? __pfx___split_vma+0x10/0x10 [ 30.979109] ? find_held_lock+0x2c/0x110 [ 30.979638] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.980218] ? lock_is_held_type+0x9f/0x120 [ 30.980752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.981361] ? mtree_range_walk+0x632/0x900 [ 30.981920] ? mas_walk+0x5c7/0x7c0 [ 30.982395] do_vmi_munmap+0x1f1/0x2b0 [ 30.982886] mmap_region+0x1f9/0x2660 [ 30.983378] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.983896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.984620] ? __pfx_lock_acquire+0x10/0x10 [ 30.985152] ? __pfx_mmap_region+0x10/0x10 [ 30.985679] ? security_mmap_addr+0x7d/0xa0 [ 30.986218] ? get_unmapped_area+0x1f5/0x3f0 [ 30.986765] do_mmap+0x854/0xf00 [ 30.987210] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.987732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.988299] ksys_mmap_pgoff+0x3af/0x500 [ 30.988804] do_syscall_64+0x3f/0x90 [ 30.989289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.989937] RIP: 0033:0x7f82a2e89d82 [ 30.990405] 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 [ 30.992549] RSP: 002b:00007ffc4583ee68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.993473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82a2e89d82 [ 30.994328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82a22c3000 [ 30.995175] RBP: 00007f82a22c3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.996042] R10: 0000000000000812 R11: 0000000000000206 R12: 000056058d541d90 [ 30.996889] R13: 00007ffc4583ee80 R14: 00007ffc4583eeb0 R15: 00007ffc4583f210 [ 30.997744] [ 30.998035] [ 30.998250] Allocated by task 213: [ 30.998677] kasan_save_stack+0x22/0x50 [ 30.999177] kasan_set_track+0x25/0x30 [ 30.999675] __kasan_slab_alloc+0x59/0x70 [ 31.000197] kmem_cache_alloc+0x16b/0x370 [ 31.000721] vm_area_dup+0x20/0x160 [ 31.001176] __split_vma+0x170/0x950 [ 31.001639] split_vma+0xc6/0x110 [ 31.002072] mprotect_fixup+0x8d2/0xb30 [ 31.002585] do_mprotect_pkey+0x87e/0xd40 [ 31.003110] __x64_sys_mprotect+0x78/0xc0 [ 31.003640] do_syscall_64+0x3f/0x90 [ 31.004119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.004766] [ 31.004981] Freed by task 213: [ 31.005380] kasan_save_stack+0x22/0x50 [ 31.005882] kasan_set_track+0x25/0x30 [ 31.006381] kasan_save_free_info+0x2b/0x50 [ 31.006920] __kasan_slab_free+0x10a/0x190 [ 31.007457] kmem_cache_free+0x10d/0x4d0 [ 31.007993] rcu_core+0x8c8/0x2860 [ 31.008441] __do_softirq+0x1b7/0x7d4 [ 31.008919] [ 31.009139] Last potentially related work creation: [ 31.009726] kasan_save_stack+0x22/0x50 [ 31.010229] __kasan_record_aux_stack+0x8e/0xa0 [ 31.010801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.011446] remove_vma+0x139/0x170 [ 31.011906] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.012463] do_vmi_munmap+0x1f1/0x2b0 [ 31.012950] __vm_munmap+0x138/0x3a0 [ 31.013420] __x64_sys_munmap+0x59/0x80 [ 31.013922] do_syscall_64+0x3f/0x90 [ 31.014400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.015039] [ 31.015260] Second to last potentially related work creation: [ 31.015960] kasan_save_stack+0x22/0x50 [ 31.016468] __kasan_record_aux_stack+0x8e/0xa0 [ 31.017042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.017677] remove_vma+0x139/0x170 [ 31.018125] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.018682] do_vmi_munmap+0x1f1/0x2b0 [ 31.019171] mmap_region+0x1f9/0x2660 [ 31.019656] do_mmap+0x854/0xf00 [ 31.020085] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.020573] ksys_mmap_pgoff+0x3af/0x500 [ 31.021078] do_syscall_64+0x3f/0x90 [ 31.021553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022196] [ 31.022417] The buggy address belongs to the object at ffff88800eebae80 [ 31.022417] which belongs to the cache vm_area_struct of size 168 [ 31.023912] The buggy address is located 88 bytes inside of [ 31.023912] freed 168-byte region [ffff88800eebae80, ffff88800eebaf28) [ 31.025336] [ 31.025552] The buggy address belongs to the physical page: [ 31.026211] page:000000004f7b7d41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeba [ 31.027301] memcg:ffff88800e492301 [ 31.027733] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.028436] page_type: 0xffffffff() [ 31.028885] raw: 0100000000000200 ffff8880087a0c80 ffffea00003baec0 dead000000000003 [ 31.029804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e492301 [ 31.030715] page dumped because: kasan: bad access detected [ 31.031371] [ 31.031592] Memory state around the buggy address: [ 31.032175] ffff88800eebad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.033036] ffff88800eebae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.033895] >ffff88800eebae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.034746] ^ [ 31.035484] ffff88800eebaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.036358] ffff88800eebaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.037204] ================================================================== [ 31.038555] Disabling lock debugging due to kernel taint [ 33.622048] BUG: Bad rss-counter state mm:00000000d80d9180 type:MM_FILEPAGES val:33 [ 33.623066] BUG: Bad rss-counter state mm:00000000d80d9180 type:MM_ANONPAGES val:22 [ 34.164485] BUG: Bad rss-counter state mm:000000004c5bf8a7 type:MM_FILEPAGES val:33 [ 34.165673] BUG: Bad rss-counter state mm:000000004c5bf8a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57088' (ECDSA) to the list of known hosts. 2023/06/20 15:13:44 fuzzer started 2023/06/20 15:13:45 dialing manager at localhost:36067 2023/06/20 15:13:45 checking machine... 2023/06/20 15:13:45 checking revisions... [ 34.808744] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:13:45 testing simple program... [ 34.861250] cgroup: Unknown subsys name 'net' [ 34.925298] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:13:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880159d51c0 RCX=0000000000000000 RDX=1ffff11002b3aab6 RSI=ffffffff814d45d9 RDI=ffff88800c9fe098 RBP=000000007fff0000 RSP=ffff8880147a7dc8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=ffff8880159d55b0 R13=dffffc0000000000 R14=ffff8880147a7e30 R15=ffffc90000642000 RIP=ffffffff812222dd RFL=00000212 [----A--] 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 00007ff659ce9900 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=0000557c82d39318 CR3=000000000c5a0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a6ccf15fb9a5af9600000000000ae988 XMM05=6bd875dce59fc6420000000000133bf8 XMM06=c291bd5c70af25b90000000000132c98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffc3af39f08 CR3=000000000dcaa000 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=2034343a33313a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000