syzkaller login: [ 28.835812] BUG: Bad rss-counter state mm:000000007e6d1639 type:MM_FILEPAGES val:33 [ 28.837222] BUG: Bad rss-counter state mm:000000007e6d1639 type:MM_ANONPAGES val:22 [ 28.982961] ================================================================== [ 28.983865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.984817] Read of size 8 at addr ffff88800d9d23f8 by task sshd/219 [ 28.985593] [ 28.985815] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.986680] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.987670] Call Trace: [ 28.987995] [ 28.988289] dump_stack_lvl+0x91/0xf0 [ 28.988783] print_report+0xcc/0x620 [ 28.989271] ? __virt_addr_valid+0x102/0x340 [ 28.989826] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.990443] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.991059] kasan_report+0xbe/0xf0 [ 28.991530] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.992182] vma_interval_tree_remove+0xc75/0xec0 [ 28.992793] vma_prepare+0xc54/0x11a0 [ 28.993275] __split_vma+0x5af/0x950 [ 28.993746] ? __pfx___split_vma+0x10/0x10 [ 28.994279] ? find_held_lock+0x2c/0x110 [ 28.994798] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.995358] ? lock_is_held_type+0x9f/0x120 [ 28.995899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.996509] ? mtree_range_walk+0x632/0x900 [ 28.997066] ? mas_walk+0x5c7/0x7c0 [ 28.997543] do_vmi_munmap+0x1f1/0x2b0 [ 28.998037] mmap_region+0x1f9/0x2660 [ 28.998515] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.999028] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.999742] ? __pfx_lock_acquire+0x10/0x10 [ 29.000280] ? __pfx_mmap_region+0x10/0x10 [ 29.000816] ? security_mmap_addr+0x7d/0xa0 [ 29.001347] ? get_unmapped_area+0x1f5/0x3f0 [ 29.001898] do_mmap+0x854/0xf00 [ 29.002342] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.002843] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.003404] ksys_mmap_pgoff+0x3af/0x500 [ 29.003913] do_syscall_64+0x3f/0x90 [ 29.004417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.005069] RIP: 0033:0x7fae401ebd82 [ 29.005523] 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 [ 29.007660] RSP: 002b:00007ffd23a8b9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.008599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae401ebd82 [ 29.009500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae3f625000 [ 29.010359] RBP: 00007fae3f625000 R08: 0000000000000009 R09: 0000000000001000 [ 29.011235] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f1eaa0ec0 [ 29.012113] R13: 00007ffd23a8b9c0 R14: 00007ffd23a8b9f0 R15: 00007ffd23a8bd50 [ 29.012989] [ 29.013283] [ 29.013507] Allocated by task 212: [ 29.013946] kasan_save_stack+0x22/0x50 [ 29.014458] kasan_set_track+0x25/0x30 [ 29.014963] __kasan_slab_alloc+0x59/0x70 [ 29.015501] kmem_cache_alloc+0x16b/0x370 [ 29.016023] vm_area_dup+0x20/0x160 [ 29.016500] __split_vma+0x170/0x950 [ 29.016973] split_vma+0xc6/0x110 [ 29.017416] mprotect_fixup+0x8d2/0xb30 [ 29.017928] do_mprotect_pkey+0x87e/0xd40 [ 29.018475] __x64_sys_mprotect+0x78/0xc0 [ 29.019033] do_syscall_64+0x3f/0x90 [ 29.019625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.020320] [ 29.020546] Freed by task 212: [ 29.020956] kasan_save_stack+0x22/0x50 [ 29.021488] kasan_set_track+0x25/0x30 [ 29.022010] kasan_save_free_info+0x2b/0x50 [ 29.022575] __kasan_slab_free+0x10a/0x190 [ 29.023149] kmem_cache_free+0x10d/0x4d0 [ 29.023683] rcu_core+0x8c8/0x2860 [ 29.024156] __do_softirq+0x1b7/0x7d4 [ 29.024666] [ 29.024888] Last potentially related work creation: [ 29.025516] kasan_save_stack+0x22/0x50 [ 29.026052] __kasan_record_aux_stack+0x8e/0xa0 [ 29.026670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.027361] remove_vma+0x139/0x170 [ 29.027846] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.028454] do_vmi_munmap+0x1f1/0x2b0 [ 29.028969] __vm_munmap+0x138/0x3a0 [ 29.029462] __x64_sys_munmap+0x59/0x80 [ 29.029990] do_syscall_64+0x3f/0x90 [ 29.030504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.031180] [ 29.031406] Second to last potentially related work creation: [ 29.032148] kasan_save_stack+0x22/0x50 [ 29.032690] __kasan_record_aux_stack+0x8e/0xa0 [ 29.033300] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.033988] remove_vma+0x139/0x170 [ 29.034465] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.035063] do_vmi_munmap+0x1f1/0x2b0 [ 29.035581] mmap_region+0x1f9/0x2660 [ 29.036095] do_mmap+0x854/0xf00 [ 29.036558] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.037081] ksys_mmap_pgoff+0x3af/0x500 [ 29.037619] do_syscall_64+0x3f/0x90 [ 29.038125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.038803] [ 29.039031] The buggy address belongs to the object at ffff88800d9d23a0 [ 29.039031] which belongs to the cache vm_area_struct of size 168 [ 29.040659] The buggy address is located 88 bytes inside of [ 29.040659] freed 168-byte region [ffff88800d9d23a0, ffff88800d9d2448) [ 29.042236] [ 29.042651] The buggy address belongs to the physical page: [ 29.043365] page:000000005f051f82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9d2 [ 29.044538] memcg:ffff88800dfec001 [ 29.044998] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.045750] page_type: 0xffffffff() [ 29.046237] raw: 0100000000000200 ffff8880087a0c80 ffffea000032db00 dead000000000005 [ 29.047231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfec001 [ 29.048387] page dumped because: kasan: bad access detected [ 29.049109] [ 29.049342] Memory state around the buggy address: [ 29.049965] ffff88800d9d2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.050886] ffff88800d9d2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.051821] >ffff88800d9d2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.052747] ^ [ 29.053867] ffff88800d9d2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.054914] ffff88800d9d2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.055822] ================================================================== [ 29.056840] Disabling lock debugging due to kernel taint [ 32.174634] BUG: Bad rss-counter state mm:000000005efff607 type:MM_FILEPAGES val:33 [ 32.175884] BUG: Bad rss-counter state mm:000000005efff607 type:MM_ANONPAGES val:22 [ 32.701253] BUG: Bad rss-counter state mm:000000001cfaad48 type:MM_FILEPAGES val:33 [ 32.702469] BUG: Bad rss-counter state mm:000000001cfaad48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37308' (ECDSA) to the list of known hosts. 2023/06/20 21:15:24 fuzzer started 2023/06/20 21:15:25 dialing manager at localhost:36067 2023/06/20 21:15:25 checking machine... 2023/06/20 21:15:25 checking revisions... [ 33.360984] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:15:25 testing simple program... [ 33.404755] cgroup: Unknown subsys name 'net' [ 33.457539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:15:24 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1353 RSI=ffff88806ce09e10 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800f0151b0 RIP=ffffffff81130368 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 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=00007f679677cd30 CR3=00000000166d6000 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=2034323a35313a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a35313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888009f829f8 RBX=ffff888009f849e8 RCX=1ffff1100132b4f8 RDX=dffffc0000000000 RSI=ffff888009a40900 RDI=ffff888009f84a18 RBP=ffff88800ab16eb8 RSP=ffff88800dd47398 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888009a40800 R13=0000000000000000 R14=ffff88800ec3f768 R15=ffff88800ec3f720 RIP=ffffffff81847688 RFL=00000046 [---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 00007f67b46e2900 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=00007f67b46c1020 CR3=0000000013a22000 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