syzkaller login: [ 30.788035] BUG: Bad rss-counter state mm:00000000f9951628 type:MM_FILEPAGES val:33 [ 30.789098] BUG: Bad rss-counter state mm:00000000f9951628 type:MM_ANONPAGES val:22 [ 30.960536] ================================================================== [ 30.961496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.962428] Read of size 8 at addr ffff88801414d6b0 by task sshd/221 [ 30.963407] [ 30.963624] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.964539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.965542] Call Trace: [ 30.965859] [ 30.966144] dump_stack_lvl+0x91/0xf0 [ 30.966647] print_report+0xcc/0x620 [ 30.967142] ? __virt_addr_valid+0x102/0x340 [ 30.967692] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.968357] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.968994] kasan_report+0xbe/0xf0 [ 30.969467] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.970102] vma_interval_tree_remove+0xc75/0xec0 [ 30.970738] vma_prepare+0xc54/0x11a0 [ 30.971238] __split_vma+0x5af/0x950 [ 30.971739] ? __pfx___split_vma+0x10/0x10 [ 30.972305] ? find_held_lock+0x2c/0x110 [ 30.972883] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.973481] ? lock_is_held_type+0x9f/0x120 [ 30.974045] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.974682] ? mtree_range_walk+0x632/0x900 [ 30.975262] ? mas_walk+0x5c7/0x7c0 [ 30.975763] do_vmi_munmap+0x1f1/0x2b0 [ 30.976287] mmap_region+0x1f9/0x2660 [ 30.976817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.977362] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.978139] ? __pfx_lock_acquire+0x10/0x10 [ 30.978705] ? __pfx_mmap_region+0x10/0x10 [ 30.979260] ? security_mmap_addr+0x7d/0xa0 [ 30.979819] ? get_unmapped_area+0x1f5/0x3f0 [ 30.980427] do_mmap+0x854/0xf00 [ 30.980889] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.981410] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.982004] ksys_mmap_pgoff+0x3af/0x500 [ 30.982538] do_syscall_64+0x3f/0x90 [ 30.983038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983724] RIP: 0033:0x7f9517f37d82 [ 30.984204] 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 [ 30.986496] RSP: 002b:00007fff890eae28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.987455] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9517f37d82 [ 30.988396] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9517371000 [ 30.989297] RBP: 00007f9517371000 R08: 0000000000000009 R09: 0000000000001000 [ 30.990197] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603e0ee6f70 [ 30.991090] R13: 00007fff890eae40 R14: 00007fff890eae70 R15: 00007fff890eb1d0 [ 30.991987] [ 30.992291] [ 30.992549] Allocated by task 214: [ 30.993005] kasan_save_stack+0x22/0x50 [ 30.993539] kasan_set_track+0x25/0x30 [ 30.994056] __kasan_slab_alloc+0x59/0x70 [ 30.994608] kmem_cache_alloc+0x16b/0x370 [ 30.995150] vm_area_dup+0x20/0x160 [ 30.995622] __split_vma+0x170/0x950 [ 30.996113] split_vma+0xc6/0x110 [ 30.996593] mprotect_fixup+0x8d2/0xb30 [ 30.997122] do_mprotect_pkey+0x87e/0xd40 [ 30.997670] __x64_sys_mprotect+0x78/0xc0 [ 30.998220] do_syscall_64+0x3f/0x90 [ 30.998717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.999399] [ 30.999620] Freed by task 211: [ 31.000029] kasan_save_stack+0x22/0x50 [ 31.000598] kasan_set_track+0x25/0x30 [ 31.001118] kasan_save_free_info+0x2b/0x50 [ 31.001684] __kasan_slab_free+0x10a/0x190 [ 31.002235] kmem_cache_free+0x10d/0x4d0 [ 31.002775] rcu_core+0x8c8/0x2860 [ 31.003243] __do_softirq+0x1b7/0x7d4 [ 31.003749] [ 31.003974] Last potentially related work creation: [ 31.004781] kasan_save_stack+0x22/0x50 [ 31.005305] __kasan_record_aux_stack+0x8e/0xa0 [ 31.005904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.006585] remove_vma+0x139/0x170 [ 31.007053] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.007635] do_vmi_munmap+0x1f1/0x2b0 [ 31.008148] __vm_munmap+0x138/0x3a0 [ 31.008680] __x64_sys_munmap+0x59/0x80 [ 31.009215] do_syscall_64+0x3f/0x90 [ 31.009715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.010395] [ 31.010623] The buggy address belongs to the object at ffff88801414d658 [ 31.010623] which belongs to the cache vm_area_struct of size 168 [ 31.012187] The buggy address is located 88 bytes inside of [ 31.012187] freed 168-byte region [ffff88801414d658, ffff88801414d700) [ 31.013687] [ 31.013914] The buggy address belongs to the physical page: [ 31.014595] page:00000000e6ec2ef0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1414d [ 31.015738] memcg:ffff88800e031001 [ 31.016182] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.016896] page_type: 0xffffffff() [ 31.017374] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.018338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e031001 [ 31.019299] page dumped because: kasan: bad access detected [ 31.019992] [ 31.020215] Memory state around the buggy address: [ 31.020853] ffff88801414d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.021745] ffff88801414d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.022636] >ffff88801414d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.023529] ^ [ 31.024138] ffff88801414d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.025061] ffff88801414d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.025957] ================================================================== [ 31.026944] Disabling lock debugging due to kernel taint [ 32.958848] BUG: Bad rss-counter state mm:00000000dcc68f29 type:MM_FILEPAGES val:33 [ 32.960044] BUG: Bad rss-counter state mm:00000000dcc68f29 type:MM_ANONPAGES val:22 [ 33.463888] BUG: Bad rss-counter state mm:000000005d03ebd5 type:MM_FILEPAGES val:33 [ 33.465120] BUG: Bad rss-counter state mm:000000005d03ebd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27749' (ECDSA) to the list of known hosts. 2023/06/20 21:08:59 fuzzer started 2023/06/20 21:08:59 dialing manager at localhost:36067 2023/06/20 21:08:59 checking machine... 2023/06/20 21:08:59 checking revisions... [ 34.186971] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:08:59 testing simple program... [ 34.228165] cgroup: Unknown subsys name 'net' [ 34.288739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:08:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff810001ce RDI=ffff88806ce09b6c RBP=0000000000000013 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ecde8d0 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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=00007fd54a772e00 CR3=0000000016344000 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=2038353a38303a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38303a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844a8f80 RDX=ffff88800f2a1b40 RSI=0000000000000003 RDI=0000000000000005 RBP=ffffffff84e396a0 RSP=ffff88800f2cfaf0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000005 R14=0000000000000002 R15=ffff88800f2cfe70 RIP=ffffffff814c04a0 RFL=00000202 [-------] 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 00007f47c1692900 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=00007f47c1671020 CR3=000000001bc4e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000