syzkaller login: [ 72.669603] BUG: Bad rss-counter state mm:00000000365abead type:MM_FILEPAGES val:33 [ 72.670483] BUG: Bad rss-counter state mm:00000000365abead type:MM_ANONPAGES val:22 [ 72.914249] ================================================================== [ 72.915155] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.916091] Read of size 8 at addr ffff8880169b1a50 by task sshd/220 [ 72.916865] [ 72.917171] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 72.918206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.919197] Call Trace: [ 72.919528] [ 72.919819] dump_stack_lvl+0x91/0xf0 [ 72.920308] print_report+0xcc/0x620 [ 72.920815] ? __virt_addr_valid+0x102/0x340 [ 72.921363] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.921995] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.922608] kasan_report+0xbe/0xf0 [ 72.923081] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.923707] vma_interval_tree_remove+0xc75/0xec0 [ 72.924309] vma_prepare+0xc54/0x11a0 [ 72.924808] __split_vma+0x5af/0x950 [ 72.925284] ? __pfx___split_vma+0x10/0x10 [ 72.925822] ? find_held_lock+0x2c/0x110 [ 72.926344] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.926914] ? lock_is_held_type+0x9f/0x120 [ 72.927454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.928068] ? mtree_range_walk+0x632/0x900 [ 72.928622] ? mas_walk+0x5c7/0x7c0 [ 72.929099] do_vmi_munmap+0x1f1/0x2b0 [ 72.929587] mmap_region+0x1f9/0x2660 [ 72.930068] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.930579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.931292] ? __pfx_lock_acquire+0x10/0x10 [ 72.931834] ? __pfx_mmap_region+0x10/0x10 [ 72.932362] ? security_mmap_addr+0x7d/0xa0 [ 72.932922] ? get_unmapped_area+0x1f5/0x3f0 [ 72.933470] do_mmap+0x854/0xf00 [ 72.933910] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.934400] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.934971] ksys_mmap_pgoff+0x3af/0x500 [ 72.935476] do_syscall_64+0x3f/0x90 [ 72.935951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.936602] RIP: 0033:0x7f884f82cd82 [ 72.937058] 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 [ 72.939180] RSP: 002b:00007ffdbccafee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.940086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f884f82cd82 [ 72.940951] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f884ec66000 [ 72.941800] RBP: 00007f884ec66000 R08: 0000000000000009 R09: 0000000000001000 [ 72.942647] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f75b8bf60 [ 72.943493] R13: 00007ffdbccaff00 R14: 00007ffdbccaff30 R15: 00007ffdbccb0290 [ 72.944349] [ 72.944644] [ 72.944864] Allocated by task 213: [ 72.945296] kasan_save_stack+0x22/0x50 [ 72.945800] kasan_set_track+0x25/0x30 [ 72.946288] __kasan_slab_alloc+0x59/0x70 [ 72.946815] kmem_cache_alloc+0x16b/0x370 [ 72.947326] vm_area_dup+0x20/0x160 [ 72.947791] __split_vma+0x170/0x950 [ 72.948277] split_vma+0xc6/0x110 [ 72.948866] mprotect_fixup+0x8d2/0xb30 [ 72.949473] do_mprotect_pkey+0x87e/0xd40 [ 72.950085] __x64_sys_mprotect+0x78/0xc0 [ 72.950701] do_syscall_64+0x3f/0x90 [ 72.951266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.952024] [ 72.952285] Freed by task 210: [ 72.952780] kasan_save_stack+0x22/0x50 [ 72.953373] kasan_set_track+0x25/0x30 [ 72.953902] kasan_save_free_info+0x2b/0x50 [ 72.954440] __kasan_slab_free+0x10a/0x190 [ 72.954964] kmem_cache_free+0x10d/0x4d0 [ 72.955465] rcu_core+0x8c8/0x2860 [ 72.955903] __do_softirq+0x1b7/0x7d4 [ 72.956379] [ 72.956612] Last potentially related work creation: [ 72.957193] kasan_save_stack+0x22/0x50 [ 72.957697] __kasan_record_aux_stack+0x8e/0xa0 [ 72.958262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.958910] remove_vma+0x139/0x170 [ 72.959354] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.959915] do_vmi_munmap+0x1f1/0x2b0 [ 72.960396] __vm_munmap+0x138/0x3a0 [ 72.960868] __x64_sys_munmap+0x59/0x80 [ 72.961367] do_syscall_64+0x3f/0x90 [ 72.961842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.962481] [ 72.962695] The buggy address belongs to the object at ffff8880169b19f8 [ 72.962695] which belongs to the cache vm_area_struct of size 168 [ 72.964161] The buggy address is located 88 bytes inside of [ 72.964161] freed 168-byte region [ffff8880169b19f8, ffff8880169b1aa0) [ 72.965564] [ 72.965777] The buggy address belongs to the physical page: [ 72.966432] page:00000000affba87a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169b1 [ 72.967521] memcg:ffff8880098e3101 [ 72.967949] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.968603] page_type: 0xffffffff() [ 72.969050] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 72.969986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098e3101 [ 72.970879] page dumped because: kasan: bad access detected [ 72.971529] [ 72.971744] Memory state around the buggy address: [ 72.972320] ffff8880169b1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.973185] ffff8880169b1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 72.974028] >ffff8880169b1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.974876] ^ [ 72.975576] ffff8880169b1a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 72.976425] ffff8880169b1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.977275] ================================================================== [ 72.978239] Disabling lock debugging due to kernel taint [ 75.005605] BUG: Bad rss-counter state mm:0000000036b0c642 type:MM_FILEPAGES val:33 [ 75.007056] BUG: Bad rss-counter state mm:0000000036b0c642 type:MM_ANONPAGES val:22 [ 75.489814] BUG: Bad rss-counter state mm:00000000a762c318 type:MM_FILEPAGES val:33 [ 75.491042] BUG: Bad rss-counter state mm:00000000a762c318 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38702' (ECDSA) to the list of known hosts. 2023/06/19 18:59:25 fuzzer started 2023/06/19 18:59:25 dialing manager at localhost:44161 2023/06/19 18:59:26 checking machine... 2023/06/19 18:59:26 checking revisions... [ 76.267095] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:59:26 testing simple program... [ 76.318132] cgroup: Unknown subsys name 'net' [ 76.370518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:58:44 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff8180995d RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e10 RDI=ffffffff8180995d RBP=ffffffff8180995d RSP=ffff88806ce09a60 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800b3fd1c0 R15=ffff88800c581480 RIP=ffffffff811fc7be RFL=00000296 [--S-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 00007f9920fd4900 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=00007f6170a39b10 CR3=000000000ecc0000 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=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd69f41e58 CR3=000000000e292000 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=2035323a39353a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a39353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000