syzkaller login: [ 38.877052] BUG: Bad rss-counter state mm:000000004965a70d type:MM_FILEPAGES val:33 [ 38.877891] BUG: Bad rss-counter state mm:000000004965a70d type:MM_ANONPAGES val:22 [ 38.994758] ================================================================== [ 38.995517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.996178] Read of size 8 at addr ffff88800e529058 by task sshd/218 [ 38.996714] [ 38.996868] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.997475] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.998151] Call Trace: [ 38.998382] [ 38.998582] dump_stack_lvl+0x91/0xf0 [ 38.999089] print_report+0xcc/0x620 [ 38.999457] ? __virt_addr_valid+0x102/0x340 [ 38.999841] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000276] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000710] kasan_report+0xbe/0xf0 [ 39.001068] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.001497] vma_interval_tree_remove+0xc75/0xec0 [ 39.001922] vma_prepare+0xc54/0x11a0 [ 39.002264] __split_vma+0x5af/0x950 [ 39.002593] ? __pfx___split_vma+0x10/0x10 [ 39.002951] ? find_held_lock+0x2c/0x110 [ 39.003379] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.003784] ? lock_is_held_type+0x9f/0x120 [ 39.004181] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.004596] ? mtree_range_walk+0x632/0x900 [ 39.004997] ? mas_walk+0x5c7/0x7c0 [ 39.005333] do_vmi_munmap+0x1f1/0x2b0 [ 39.005668] mmap_region+0x1f9/0x2660 [ 39.006010] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.006367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.006871] ? __pfx_lock_acquire+0x10/0x10 [ 39.007292] ? __pfx_mmap_region+0x10/0x10 [ 39.007639] ? security_mmap_addr+0x7d/0xa0 [ 39.008009] ? get_unmapped_area+0x1f5/0x3f0 [ 39.008434] do_mmap+0x854/0xf00 [ 39.008740] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.009092] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.009486] ksys_mmap_pgoff+0x3af/0x500 [ 39.009871] do_syscall_64+0x3f/0x90 [ 39.010211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.010669] RIP: 0033:0x7f355bf09d82 [ 39.010998] 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 [ 39.012572] RSP: 002b:00007fff70518638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.013218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f355bf09d82 [ 39.013813] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f355b343000 [ 39.014425] RBP: 00007f355b343000 R08: 0000000000000009 R09: 0000000000001000 [ 39.015008] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560dd0ce5b20 [ 39.015702] R13: 00007fff70518650 R14: 00007fff70518680 R15: 00007fff705189e0 [ 39.016301] [ 39.016496] [ 39.016665] Allocated by task 211: [ 39.016995] kasan_save_stack+0x22/0x50 [ 39.017355] kasan_set_track+0x25/0x30 [ 39.017694] __kasan_slab_alloc+0x59/0x70 [ 39.018089] kmem_cache_alloc+0x16b/0x370 [ 39.018435] vm_area_dup+0x20/0x160 [ 39.018766] __split_vma+0x170/0x950 [ 39.019095] split_vma+0xc6/0x110 [ 39.019445] mprotect_fixup+0x8d2/0xb30 [ 39.019803] do_mprotect_pkey+0x87e/0xd40 [ 39.020163] __x64_sys_mprotect+0x78/0xc0 [ 39.020510] do_syscall_64+0x3f/0x90 [ 39.020828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021309] [ 39.021460] Freed by task 211: [ 39.021731] kasan_save_stack+0x22/0x50 [ 39.022076] kasan_set_track+0x25/0x30 [ 39.022429] kasan_save_free_info+0x2b/0x50 [ 39.022786] __kasan_slab_free+0x10a/0x190 [ 39.023149] kmem_cache_free+0x10d/0x4d0 [ 39.023531] rcu_core+0x8c8/0x2860 [ 39.023822] __do_softirq+0x1b7/0x7d4 [ 39.024143] [ 39.024294] Last potentially related work creation: [ 39.024697] kasan_save_stack+0x22/0x50 [ 39.025035] __kasan_record_aux_stack+0x8e/0xa0 [ 39.025422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.025859] remove_vma+0x139/0x170 [ 39.026164] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.026593] do_vmi_munmap+0x1f1/0x2b0 [ 39.026923] __vm_munmap+0x138/0x3a0 [ 39.027271] __x64_sys_munmap+0x59/0x80 [ 39.027614] do_syscall_64+0x3f/0x90 [ 39.027942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.028382] [ 39.028521] Second to last potentially related work creation: [ 39.028954] kasan_save_stack+0x22/0x50 [ 39.029326] __kasan_record_aux_stack+0x8e/0xa0 [ 39.029715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.030139] remove_vma+0x139/0x170 [ 39.030433] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.030812] do_vmi_munmap+0x1f1/0x2b0 [ 39.031144] mmap_region+0x1f9/0x2660 [ 39.031502] do_mmap+0x854/0xf00 [ 39.031796] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.032126] ksys_mmap_pgoff+0x3af/0x500 [ 39.032464] do_syscall_64+0x3f/0x90 [ 39.032795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033225] [ 39.033373] The buggy address belongs to the object at ffff88800e529000 [ 39.033373] which belongs to the cache vm_area_struct of size 168 [ 39.034414] The buggy address is located 88 bytes inside of [ 39.034414] freed 168-byte region [ffff88800e529000, ffff88800e5290a8) [ 39.035483] [ 39.035636] The buggy address belongs to the physical page: [ 39.036098] page:00000000f6b297be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe529 [ 39.036841] memcg:ffff88800e2d4b01 [ 39.037137] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.037592] page_type: 0xffffffff() [ 39.037929] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.038577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2d4b01 [ 39.039222] page dumped because: kasan: bad access detected [ 39.039727] [ 39.039896] Memory state around the buggy address: [ 39.040338] ffff88800e528f00: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.040998] ffff88800e528f80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.041590] >ffff88800e529000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.042192] ^ [ 39.042727] ffff88800e529080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 39.043354] ffff88800e529100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.043934] ================================================================== [ 39.044691] Disabling lock debugging due to kernel taint [ 40.984000] BUG: Bad rss-counter state mm:00000000150c89e4 type:MM_FILEPAGES val:33 [ 40.984694] BUG: Bad rss-counter state mm:00000000150c89e4 type:MM_ANONPAGES val:22 [ 41.312679] BUG: Bad rss-counter state mm:00000000407b9717 type:MM_FILEPAGES val:33 [ 41.313381] BUG: Bad rss-counter state mm:00000000407b9717 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4233' (ECDSA) to the list of known hosts. 2023/06/21 08:57:12 fuzzer started 2023/06/21 08:57:12 dialing manager at localhost:36067 2023/06/21 08:57:12 checking machine... 2023/06/21 08:57:12 checking revisions... [ 41.916199] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:57:12 testing simple program... [ 41.959348] cgroup: Unknown subsys name 'net' [ 41.999531] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:12 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888016e779a8 RSI=ffff888016e77980 RDI=ffff888016e775b8 RBP=ffff888016e70000 RSP=ffff888016e77578 R8 =0000000000000001 R9 =ffff888016e775e8 R10=0000000000038001 R11=0000000000020a5f R12=ffff888016e77608 R13=ffff888016e775f0 R14=ffff888016e77980 R15=ffff888016e775a8 RIP=ffffffff81130930 RFL=00000292 [--S-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 00007f88c3a7d900 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=00007ffd72cfb000 CR3=000000000c6dc000 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=6720646572637465733a4d41503d706f 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 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=00007ff61d8a8fc0 CR3=000000000c6d0000 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=2032313a37353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a37353a3830203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000