syzkaller login: [ 77.823049] BUG: Bad rss-counter state mm:00000000a11abf4c type:MM_FILEPAGES val:33 [ 77.824607] BUG: Bad rss-counter state mm:00000000a11abf4c type:MM_ANONPAGES val:22 [ 77.985951] ================================================================== [ 77.986922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 77.987870] Read of size 8 at addr ffff88800e5a15c8 by task sshd/221 [ 77.988648] [ 77.988870] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 77.990034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 77.991036] Call Trace: [ 77.991362] [ 77.991653] dump_stack_lvl+0x91/0xf0 [ 77.992144] print_report+0xcc/0x620 [ 77.992628] ? __virt_addr_valid+0x102/0x340 [ 77.993179] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.993794] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.994406] kasan_report+0xbe/0xf0 [ 77.994897] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.995517] vma_interval_tree_remove+0xc75/0xec0 [ 77.996117] vma_prepare+0xc54/0x11a0 [ 77.996597] __split_vma+0x5af/0x950 [ 77.997064] ? __pfx___split_vma+0x10/0x10 [ 77.997589] ? find_held_lock+0x2c/0x110 [ 77.998104] do_vmi_align_munmap+0x2ba/0x11f0 [ 77.998671] ? lock_is_held_type+0x9f/0x120 [ 77.999226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 77.999836] ? mtree_range_walk+0x632/0x900 [ 78.000378] ? mas_walk+0x5c7/0x7c0 [ 78.000852] do_vmi_munmap+0x1f1/0x2b0 [ 78.001347] mmap_region+0x1f9/0x2660 [ 78.001841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.002350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.003075] ? __pfx_lock_acquire+0x10/0x10 [ 78.003613] ? __pfx_mmap_region+0x10/0x10 [ 78.004143] ? security_mmap_addr+0x7d/0xa0 [ 78.004683] ? get_unmapped_area+0x1f5/0x3f0 [ 78.005231] do_mmap+0x854/0xf00 [ 78.005671] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.006165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.006724] ksys_mmap_pgoff+0x3af/0x500 [ 78.007259] do_syscall_64+0x3f/0x90 [ 78.007733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.008384] RIP: 0033:0x7f1be9ef8d82 [ 78.008847] 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 [ 78.010955] RSP: 002b:00007ffead390f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.011853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1be9ef8d82 [ 78.012688] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1be9332000 [ 78.013567] RBP: 00007f1be9332000 R08: 0000000000000009 R09: 0000000000001000 [ 78.014497] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e26f7cec0 [ 78.015331] R13: 00007ffead390fa0 R14: 00007ffead390fd0 R15: 00007ffead391330 [ 78.016174] [ 78.016460] [ 78.016669] Allocated by task 214: [ 78.017088] kasan_save_stack+0x22/0x50 [ 78.017580] kasan_set_track+0x25/0x30 [ 78.018056] __kasan_slab_alloc+0x59/0x70 [ 78.018570] kmem_cache_alloc+0x16b/0x370 [ 78.019088] vm_area_dup+0x20/0x160 [ 78.019534] __split_vma+0x170/0x950 [ 78.019990] split_vma+0xc6/0x110 [ 78.020423] mprotect_fixup+0x8d2/0xb30 [ 78.020937] do_mprotect_pkey+0x87e/0xd40 [ 78.021446] __x64_sys_mprotect+0x78/0xc0 [ 78.021950] do_syscall_64+0x3f/0x90 [ 78.022411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.023045] [ 78.023254] Freed by task 214: [ 78.023647] kasan_save_stack+0x22/0x50 [ 78.024159] kasan_set_track+0x25/0x30 [ 78.024643] kasan_save_free_info+0x2b/0x50 [ 78.025159] __kasan_slab_free+0x10a/0x190 [ 78.025679] kmem_cache_free+0x10d/0x4d0 [ 78.026175] rcu_core+0x8c8/0x2860 [ 78.026613] __do_softirq+0x1b7/0x7d4 [ 78.027125] [ 78.027334] Last potentially related work creation: [ 78.027903] kasan_save_stack+0x22/0x50 [ 78.028395] __kasan_record_aux_stack+0x8e/0xa0 [ 78.028953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.029581] remove_vma+0x139/0x170 [ 78.030065] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.030607] do_vmi_munmap+0x1f1/0x2b0 [ 78.031092] __vm_munmap+0x138/0x3a0 [ 78.031548] __x64_sys_munmap+0x59/0x80 [ 78.032036] do_syscall_64+0x3f/0x90 [ 78.032508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.033140] [ 78.033354] Second to last potentially related work creation: [ 78.034028] kasan_save_stack+0x22/0x50 [ 78.034527] __kasan_record_aux_stack+0x8e/0xa0 [ 78.035112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.035747] remove_vma+0x139/0x170 [ 78.036192] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.036755] do_vmi_munmap+0x1f1/0x2b0 [ 78.037237] mmap_region+0x1f9/0x2660 [ 78.037708] do_mmap+0x854/0xf00 [ 78.038140] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.038628] ksys_mmap_pgoff+0x3af/0x500 [ 78.039126] do_syscall_64+0x3f/0x90 [ 78.039606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.040241] [ 78.040453] The buggy address belongs to the object at ffff88800e5a1570 [ 78.040453] which belongs to the cache vm_area_struct of size 168 [ 78.041886] The buggy address is located 88 bytes inside of [ 78.041886] freed 168-byte region [ffff88800e5a1570, ffff88800e5a1618) [ 78.043264] [ 78.043475] The buggy address belongs to the physical page: [ 78.044112] page:000000008946b669 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5a1 [ 78.045163] memcg:ffff88800e3c0501 [ 78.045576] flags: 0x100000000000200(slab|node=0|zone=1) [ 78.046203] page_type: 0xffffffff() [ 78.046643] raw: 0100000000000200 ffff88800879fc80 ffffea0000317fc0 dead000000000002 [ 78.047544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3c0501 [ 78.048423] page dumped because: kasan: bad access detected [ 78.049064] [ 78.049273] Memory state around the buggy address: [ 78.049845] ffff88800e5a1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.050682] ffff88800e5a1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 78.051524] >ffff88800e5a1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.052353] ^ [ 78.053016] ffff88800e5a1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 78.053841] ffff88800e5a1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.054665] ================================================================== [ 78.055599] Disabling lock debugging due to kernel taint [ 80.131306] BUG: Bad rss-counter state mm:0000000053eda260 type:MM_FILEPAGES val:33 [ 80.132083] BUG: Bad rss-counter state mm:0000000053eda260 type:MM_ANONPAGES val:22 [ 80.494759] BUG: Bad rss-counter state mm:000000009813bea0 type:MM_FILEPAGES val:33 [ 80.495819] BUG: Bad rss-counter state mm:000000009813bea0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10222' (ECDSA) to the list of known hosts. 2023/06/20 03:10:20 fuzzer started 2023/06/20 03:10:21 dialing manager at localhost:44161 2023/06/20 03:10:21 checking machine... 2023/06/20 03:10:21 checking revisions... [ 81.166598] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:10:21 testing simple program... [ 81.201265] cgroup: Unknown subsys name 'net' [ 81.234364] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:09:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002858e7b RSI=ffffffff81935d9a RDI=ffff8880142c7378 RBP=ffff8880142c73d0 RSP=ffff8880142c7308 R8 =0000000000000001 R9 =ffff8880142c73b8 R10=0000000000038001 R11=000000000002c9ea R12=ffff8880142c73d8 R13=ffff8880142c73c0 R14=ffff888016db51c0 R15=ffff8880142c7378 RIP=ffffffff81130682 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5e758d0900 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=00007f5e74d5beb0 CR3=000000000c9c8000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=73782a3a7e83251700000000000ae988 XMM05=0eb42cc988b3f5b9000000000013e740 XMM06=00c3ffa147b8d857000000000013d530 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888010318000 RBX=ffff88801031f920 RCX=ffff88801031f928 RDX=ffff888010320000 RSI=ffff88801031f858 RDI=ffff88801031f898 RBP=dffffc0000000000 RSP=ffff88801031f838 R8 =0000000000000001 R9 =ffff88801031f8c8 R10=0000000000038001 R11=0000000000006097 R12=ffffed1002063f13 R13=ffffed1002063f12 R14=ffff88801031f8d0 R15=ffff88801031f888 RIP=ffffffff81132fd4 RFL=00000216 [----AP-] 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 00007f244e5e9900 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=00007ffeea59f000 CR3=00000000159ae000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000