syzkaller login: [ 38.816591] BUG: Bad rss-counter state mm:00000000cd16a96f type:MM_FILEPAGES val:33 [ 38.818000] BUG: Bad rss-counter state mm:00000000cd16a96f type:MM_ANONPAGES val:22 [ 38.962147] ================================================================== [ 38.963066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.964025] Read of size 8 at addr ffff88800e65eed8 by task sshd/220 [ 38.964809] [ 38.965135] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.966051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.967068] Call Trace: [ 38.967396] [ 38.967695] dump_stack_lvl+0x91/0xf0 [ 38.968190] print_report+0xcc/0x620 [ 38.968687] ? __virt_addr_valid+0x102/0x340 [ 38.969283] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.969938] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.970580] kasan_report+0xbe/0xf0 [ 38.971062] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971703] vma_interval_tree_remove+0xc75/0xec0 [ 38.972316] vma_prepare+0xc54/0x11a0 [ 38.972810] __split_vma+0x5af/0x950 [ 38.973301] ? __pfx___split_vma+0x10/0x10 [ 38.973856] ? find_held_lock+0x2c/0x110 [ 38.974389] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.974972] ? mas_destroy+0x1fe/0x8b0 [ 38.975497] ? lock_is_held_type+0x9f/0x120 [ 38.976045] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.976671] ? mtree_range_walk+0x632/0x900 [ 38.977238] ? mas_walk+0x5c7/0x7c0 [ 38.977755] do_vmi_munmap+0x1f1/0x2b0 [ 38.978256] mmap_region+0x1f9/0x2660 [ 38.978765] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.979284] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.980018] ? __pfx_lock_acquire+0x10/0x10 [ 38.980571] ? __pfx_mmap_region+0x10/0x10 [ 38.981105] ? security_mmap_addr+0x7d/0xa0 [ 38.981705] ? get_unmapped_area+0x1f5/0x3f0 [ 38.982265] do_mmap+0x854/0xf00 [ 38.982723] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.983223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.983807] ksys_mmap_pgoff+0x3af/0x500 [ 38.984320] do_syscall_64+0x3f/0x90 [ 38.984810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.985512] RIP: 0033:0x7f0d60542d82 [ 38.985973] 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 [ 38.988140] RSP: 002b:00007ffc4618e678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.989068] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d60542d82 [ 38.989975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d5f97c000 [ 38.990849] RBP: 00007f0d5f97c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.991716] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c64253eec0 [ 38.992589] R13: 00007ffc4618e690 R14: 00007ffc4618e6c0 R15: 00007ffc4618ea20 [ 38.993506] [ 38.993803] [ 38.994020] Allocated by task 213: [ 38.994469] kasan_save_stack+0x22/0x50 [ 38.994981] kasan_set_track+0x25/0x30 [ 38.995494] __kasan_slab_alloc+0x59/0x70 [ 38.996023] kmem_cache_alloc+0x16b/0x370 [ 38.996558] vm_area_dup+0x20/0x160 [ 38.997017] __split_vma+0x170/0x950 [ 38.997542] split_vma+0xc6/0x110 [ 38.997984] mprotect_fixup+0x8d2/0xb30 [ 38.998505] do_mprotect_pkey+0x87e/0xd40 [ 38.999028] __x64_sys_mprotect+0x78/0xc0 [ 38.999568] do_syscall_64+0x3f/0x90 [ 39.000050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.000718] [ 39.000935] Freed by task 213: [ 39.001365] kasan_save_stack+0x22/0x50 [ 39.001903] kasan_set_track+0x25/0x30 [ 39.002407] kasan_save_free_info+0x2b/0x50 [ 39.002955] __kasan_slab_free+0x10a/0x190 [ 39.003505] kmem_cache_free+0x10d/0x4d0 [ 39.004018] rcu_core+0x8c8/0x2860 [ 39.004485] __do_softirq+0x1b7/0x7d4 [ 39.004967] [ 39.005182] Last potentially related work creation: [ 39.005814] kasan_save_stack+0x22/0x50 [ 39.006322] __kasan_record_aux_stack+0x8e/0xa0 [ 39.006924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007587] remove_vma+0x139/0x170 [ 39.008046] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.008631] do_vmi_munmap+0x1f1/0x2b0 [ 39.009127] __vm_munmap+0x138/0x3a0 [ 39.009651] __x64_sys_munmap+0x59/0x80 [ 39.010168] do_syscall_64+0x3f/0x90 [ 39.010677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.011336] [ 39.011568] The buggy address belongs to the object at ffff88800e65ee80 [ 39.011568] which belongs to the cache vm_area_struct of size 168 [ 39.013090] The buggy address is located 88 bytes inside of [ 39.013090] freed 168-byte region [ffff88800e65ee80, ffff88800e65ef28) [ 39.014620] [ 39.014854] The buggy address belongs to the physical page: [ 39.015565] page:000000006de2fe11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe65e [ 39.016719] memcg:ffff88800d689f01 [ 39.017174] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.017921] page_type: 0xffffffff() [ 39.018414] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c5c0 dead000000000006 [ 39.019414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d689f01 [ 39.020390] page dumped because: kasan: bad access detected [ 39.021104] [ 39.021363] Memory state around the buggy address: [ 39.021984] ffff88800e65ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.022901] ffff88800e65ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.023818] >ffff88800e65ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.024724] ^ [ 39.025525] ffff88800e65ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.026442] ffff88800e65ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.027344] ================================================================== [ 39.028361] Disabling lock debugging due to kernel taint [ 40.961058] BUG: Bad rss-counter state mm:000000001ee766a3 type:MM_FILEPAGES val:33 [ 40.962066] BUG: Bad rss-counter state mm:000000001ee766a3 type:MM_ANONPAGES val:22 [ 41.512036] BUG: Bad rss-counter state mm:0000000084b0243b type:MM_FILEPAGES val:33 [ 41.513028] BUG: Bad rss-counter state mm:0000000084b0243b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19005' (ECDSA) to the list of known hosts. 2023/06/20 11:40:42 fuzzer started 2023/06/20 11:40:42 dialing manager at localhost:36067 2023/06/20 11:40:42 checking machine... 2023/06/20 11:40:42 checking revisions... [ 42.129654] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:40:42 testing simple program... [ 42.169583] cgroup: Unknown subsys name 'net' [ 42.208712] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000008 RSI=ffff88801994f8d0 RDI=ffff88801994f7a0 RBP=ffff88801994f7f8 RSP=ffff88801994f728 R8 =ffffffff860d825a R9 =ffff88801994f7e0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801994f800 R13=ffff88801994f7e8 R14=ffff88801994f8d8 R15=ffff88801994f7a0 RIP=ffffffff811303fa 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 00007f4001f97900 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=00007fff42f95000 CR3=000000000ef4c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e13b6 RSP=ffff88806cf09da0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b520 R13=ffffffff813782e4 R14=ffff88806cf35000 R15=ffff888016544540 RIP=ffffffff812d871f RFL=00000206 [-----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 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=00007eff0b344f70 CR3=00000000097ce000 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=2032343a30343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30343a3131203032 XMM08=00000000000000000000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000