syzkaller login: [ 30.729174] BUG: Bad rss-counter state mm:000000005d824573 type:MM_FILEPAGES val:33 [ 30.730228] BUG: Bad rss-counter state mm:000000005d824573 type:MM_ANONPAGES val:22 [ 30.975638] ================================================================== [ 30.976536] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.977508] Read of size 8 at addr ffff88800dd77df0 by task sshd/220 [ 30.978308] [ 30.978535] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.979469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.980504] Call Trace: [ 30.980824] [ 30.981112] dump_stack_lvl+0x91/0xf0 [ 30.981606] print_report+0xcc/0x620 [ 30.982096] ? __virt_addr_valid+0x102/0x340 [ 30.982660] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.983290] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.983911] kasan_report+0xbe/0xf0 [ 30.984393] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.985019] vma_interval_tree_remove+0xc75/0xec0 [ 30.985659] vma_prepare+0xc54/0x11a0 [ 30.986138] __split_vma+0x5af/0x950 [ 30.986613] ? __pfx___split_vma+0x10/0x10 [ 30.987140] ? find_held_lock+0x2c/0x110 [ 30.987681] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.988246] ? lock_is_held_type+0x9f/0x120 [ 30.988800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.989411] ? mtree_range_walk+0x632/0x900 [ 30.989964] ? mas_walk+0x5c7/0x7c0 [ 30.990441] do_vmi_munmap+0x1f1/0x2b0 [ 30.990932] mmap_region+0x1f9/0x2660 [ 30.991436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.991948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.992670] ? __pfx_lock_acquire+0x10/0x10 [ 30.993207] ? __pfx_mmap_region+0x10/0x10 [ 30.993735] ? security_mmap_addr+0x7d/0xa0 [ 30.994265] ? get_unmapped_area+0x1f5/0x3f0 [ 30.994818] do_mmap+0x854/0xf00 [ 30.995266] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.995762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.996347] ksys_mmap_pgoff+0x3af/0x500 [ 30.996861] do_syscall_64+0x3f/0x90 [ 30.997343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.997991] RIP: 0033:0x7fb2913ddd82 [ 30.998455] 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 [ 31.000665] RSP: 002b:00007ffd35554038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.001608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2913ddd82 [ 31.002503] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb290817000 [ 31.003417] RBP: 00007fb290817000 R08: 0000000000000009 R09: 0000000000001000 [ 31.004312] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd90980ec0 [ 31.005222] R13: 00007ffd35554050 R14: 00007ffd35554080 R15: 00007ffd355543e0 [ 31.006093] [ 31.006393] [ 31.006607] Allocated by task 213: [ 31.007036] kasan_save_stack+0x22/0x50 [ 31.007546] kasan_set_track+0x25/0x30 [ 31.008046] __kasan_slab_alloc+0x59/0x70 [ 31.008601] kmem_cache_alloc+0x16b/0x370 [ 31.009156] vm_area_dup+0x20/0x160 [ 31.009613] __split_vma+0x170/0x950 [ 31.010074] split_vma+0xc6/0x110 [ 31.010516] mprotect_fixup+0x8d2/0xb30 [ 31.011025] do_mprotect_pkey+0x87e/0xd40 [ 31.011584] __x64_sys_mprotect+0x78/0xc0 [ 31.012129] do_syscall_64+0x3f/0x90 [ 31.012618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.013260] [ 31.013476] Freed by task 203: [ 31.013864] kasan_save_stack+0x22/0x50 [ 31.014372] kasan_set_track+0x25/0x30 [ 31.014869] kasan_save_free_info+0x2b/0x50 [ 31.015411] __kasan_slab_free+0x10a/0x190 [ 31.015942] kmem_cache_free+0x10d/0x4d0 [ 31.016452] rcu_core+0x8c8/0x2860 [ 31.016899] __do_softirq+0x1b7/0x7d4 [ 31.017381] [ 31.017597] Last potentially related work creation: [ 31.018221] kasan_save_stack+0x22/0x50 [ 31.018744] __kasan_record_aux_stack+0x8e/0xa0 [ 31.019355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.020028] remove_vma+0x139/0x170 [ 31.020501] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.021090] do_vmi_munmap+0x1f1/0x2b0 [ 31.021578] __vm_munmap+0x138/0x3a0 [ 31.022046] __x64_sys_munmap+0x59/0x80 [ 31.022557] do_syscall_64+0x3f/0x90 [ 31.023051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.023728] [ 31.023953] The buggy address belongs to the object at ffff88800dd77d98 [ 31.023953] which belongs to the cache vm_area_struct of size 168 [ 31.025493] The buggy address is located 88 bytes inside of [ 31.025493] freed 168-byte region [ffff88800dd77d98, ffff88800dd77e40) [ 31.026899] [ 31.027116] The buggy address belongs to the physical page: [ 31.027785] page:00000000a85f1181 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd77 [ 31.028880] memcg:ffff888009553e01 [ 31.029304] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.029971] page_type: 0xffffffff() [ 31.030457] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.031431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009553e01 [ 31.032357] page dumped because: kasan: bad access detected [ 31.033027] [ 31.033253] Memory state around the buggy address: [ 31.033841] ffff88800dd77c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.034707] ffff88800dd77d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.035585] >ffff88800dd77d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.036477] ^ [ 31.037321] ffff88800dd77e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.038189] ffff88800dd77e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.039060] ================================================================== [ 31.040230] Disabling lock debugging due to kernel taint [ 33.138282] BUG: Bad rss-counter state mm:00000000a8539105 type:MM_FILEPAGES val:33 [ 33.139540] BUG: Bad rss-counter state mm:00000000a8539105 type:MM_ANONPAGES val:22 [ 33.547905] BUG: Bad rss-counter state mm:000000003f3a3155 type:MM_FILEPAGES val:33 [ 33.548920] BUG: Bad rss-counter state mm:000000003f3a3155 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39817' (ECDSA) to the list of known hosts. 2023/06/21 04:34:21 fuzzer started 2023/06/21 04:34:21 dialing manager at localhost:36067 2023/06/21 04:34:21 checking machine... 2023/06/21 04:34:21 checking revisions... [ 34.354007] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:34:21 testing simple program... [ 34.404367] cgroup: Unknown subsys name 'net' [ 34.444879] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:34:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100206bf35 RSI=ffffffff8180c5af RDI=ffff88801035fa18 RBP=ffff88801035f9e8 RSP=ffff88801035f948 R8 =ffffffff86138eb4 R9 =ffff88801035f990 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801035fa18 R13=0000000000000000 R14=ffff888015d1b680 R15=ffff888015daa000 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007f7a67fd4900 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=00007f7a68589650 CR3=000000000db4c000 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=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=00007fce90418c60 CR3=0000000013a5c000 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=4cfff2eed7d022a98041237e99d35729 XMM02=000000000011a8e8ec2efd57dc4c00df XMM03=0000000000122190b8b9426a8cff3cec XMM04=c04f274f2ec3f56500000000000ae988 XMM05=e4cb8bb95a7664b60000000000132010 XMM06=f6436f93fa5de7cb0000000000130e78 XMM07=e042d86d42eb936e0000000000122410 XMM08=b8b9426a8cff3cec000000000011a948 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000