syzkaller login: [ 55.783505] sshd (214) used greatest stack depth: 24128 bytes left [ 55.786001] BUG: Bad rss-counter state mm:000000007ce856ec type:MM_FILEPAGES val:33 [ 55.787828] BUG: Bad rss-counter state mm:000000007ce856ec type:MM_ANONPAGES val:22 [ 55.959317] ================================================================== [ 55.960245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.961194] Read of size 8 at addr ffff888019da14e0 by task sshd/221 [ 55.962187] [ 55.962484] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 55.963586] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.964585] Call Trace: [ 55.964922] [ 55.965208] dump_stack_lvl+0x91/0xf0 [ 55.965749] print_report+0xcc/0x620 [ 55.966247] ? __virt_addr_valid+0x102/0x340 [ 55.966823] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.967443] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.968077] kasan_report+0xbe/0xf0 [ 55.968552] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.969189] vma_interval_tree_remove+0xc75/0xec0 [ 55.969827] vma_prepare+0xc54/0x11a0 [ 55.970307] __split_vma+0x5af/0x950 [ 55.970810] ? __pfx___split_vma+0x10/0x10 [ 55.971335] ? find_held_lock+0x2c/0x110 [ 55.971872] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.972431] ? lock_is_held_type+0x9f/0x120 [ 55.972986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.973606] ? mtree_range_walk+0x632/0x900 [ 55.974203] ? mas_walk+0x5c7/0x7c0 [ 55.974695] do_vmi_munmap+0x1f1/0x2b0 [ 55.975190] mmap_region+0x1f9/0x2660 [ 55.975683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.976194] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.976915] ? __pfx_lock_acquire+0x10/0x10 [ 55.977443] ? __pfx_mmap_region+0x10/0x10 [ 55.978015] ? security_mmap_addr+0x7d/0xa0 [ 55.978543] ? get_unmapped_area+0x1f5/0x3f0 [ 55.979119] do_mmap+0x854/0xf00 [ 55.979561] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.980071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.980648] ksys_mmap_pgoff+0x3af/0x500 [ 55.981163] do_syscall_64+0x3f/0x90 [ 55.981674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.982348] RIP: 0033:0x7f5507286d82 [ 55.982858] 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 [ 55.984997] RSP: 002b:00007ffe13c3aaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.985940] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5507286d82 [ 55.986801] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55066c0000 [ 55.987655] RBP: 00007f55066c0000 R08: 0000000000000009 R09: 0000000000001000 [ 55.988504] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561200464d90 [ 55.989368] R13: 00007ffe13c3aac0 R14: 00007ffe13c3aaf0 R15: 00007ffe13c3ae50 [ 55.990256] [ 55.990550] [ 55.990781] Allocated by task 214: [ 55.991214] kasan_save_stack+0x22/0x50 [ 55.991729] kasan_set_track+0x25/0x30 [ 55.992225] __kasan_slab_alloc+0x59/0x70 [ 55.992760] kmem_cache_alloc+0x16b/0x370 [ 55.993282] vm_area_dup+0x20/0x160 [ 55.993782] __split_vma+0x170/0x950 [ 55.994248] split_vma+0xc6/0x110 [ 55.994705] mprotect_fixup+0x8d2/0xb30 [ 55.995209] do_mprotect_pkey+0x87e/0xd40 [ 55.995739] __x64_sys_mprotect+0x78/0xc0 [ 55.996266] do_syscall_64+0x3f/0x90 [ 55.996766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.997415] [ 55.997653] Freed by task 214: [ 55.998069] kasan_save_stack+0x22/0x50 [ 55.998572] kasan_set_track+0x25/0x30 [ 55.999089] kasan_save_free_info+0x2b/0x50 [ 55.999643] __kasan_slab_free+0x10a/0x190 [ 56.000180] kmem_cache_free+0x10d/0x4d0 [ 56.000698] rcu_core+0x8c8/0x2860 [ 56.001142] __do_softirq+0x1b7/0x7d4 [ 56.001658] [ 56.001937] Last potentially related work creation: [ 56.002536] kasan_save_stack+0x22/0x50 [ 56.003192] __kasan_record_aux_stack+0x8e/0xa0 [ 56.003788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.004431] remove_vma+0x139/0x170 [ 56.004899] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.005463] do_vmi_munmap+0x1f1/0x2b0 [ 56.005994] __vm_munmap+0x138/0x3a0 [ 56.006481] __x64_sys_munmap+0x59/0x80 [ 56.007001] do_syscall_64+0x3f/0x90 [ 56.007473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.008131] [ 56.008349] The buggy address belongs to the object at ffff888019da1488 [ 56.008349] which belongs to the cache vm_area_struct of size 168 [ 56.009879] The buggy address is located 88 bytes inside of [ 56.009879] freed 168-byte region [ffff888019da1488, ffff888019da1530) [ 56.011290] [ 56.011507] The buggy address belongs to the physical page: [ 56.012191] page:000000005340c281 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19da1 [ 56.013297] memcg:ffff88801026b301 [ 56.013776] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.014420] page_type: 0xffffffff() [ 56.014884] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.015809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801026b301 [ 56.016723] page dumped because: kasan: bad access detected [ 56.017377] [ 56.017603] Memory state around the buggy address: [ 56.018224] ffff888019da1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.019097] ffff888019da1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 56.019962] >ffff888019da1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.020826] ^ [ 56.021581] ffff888019da1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 56.022478] ffff888019da1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.023354] ================================================================== [ 56.024299] Disabling lock debugging due to kernel taint [ 58.381801] BUG: Bad rss-counter state mm:00000000d230a9b8 type:MM_FILEPAGES val:33 [ 58.382988] BUG: Bad rss-counter state mm:00000000d230a9b8 type:MM_ANONPAGES val:22 [ 58.803897] BUG: Bad rss-counter state mm:000000004ee17949 type:MM_FILEPAGES val:33 [ 58.805066] BUG: Bad rss-counter state mm:000000004ee17949 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57953' (ECDSA) to the list of known hosts. 2023/06/20 00:35:34 fuzzer started 2023/06/20 00:35:34 dialing manager at localhost:44161 2023/06/20 00:35:34 checking machine... 2023/06/20 00:35:34 checking revisions... [ 59.480748] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:35:34 testing simple program... [ 59.529087] cgroup: Unknown subsys name 'net' [ 59.564110] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880160e2000 RCX=0000000000000000 RDX=1ffff110028c6eee RSI=ffffffff8189dcb8 RDI=0000000000000001 RBP=ffff888014637788 RSP=ffff888014637630 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=ffff888014637790 R14=ffff888014637770 R15=ffff888014637750 RIP=ffffffff814c07e0 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 00007f32b7386900 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=00007f32b67e9180 CR3=000000000d59c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=db6d10ba7089462c00000000000ae988 XMM05=13f8fd71b0629359000000000013d508 XMM06=c291bd5c70af25b9000000000013c2f8 XMM07=fb795ef6d6577056000000000012c810 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0a745 RBX=ffffffff86053a2c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a2c RSP=ffff888008f4f150 R8 =ffffffff864b9d50 R9 =ffff888008f4f248 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f10575b7900 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=00007ffe82c23000 CR3=000000000e4a6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000