syzkaller login: [ 38.578153] BUG: Bad rss-counter state mm:00000000832a9fec type:MM_FILEPAGES val:33 [ 38.579390] BUG: Bad rss-counter state mm:00000000832a9fec type:MM_ANONPAGES val:22 [ 38.620144] ================================================================== [ 38.621226] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.622195] Read of size 8 at addr ffff888016b58310 by task sshd/220 [ 38.623112] [ 38.623334] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.624227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.625220] Call Trace: [ 38.625539] [ 38.625822] dump_stack_lvl+0x91/0xf0 [ 38.626314] print_report+0xcc/0x620 [ 38.626797] ? __virt_addr_valid+0x102/0x340 [ 38.627368] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.627983] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.628602] kasan_report+0xbe/0xf0 [ 38.629085] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.629708] vma_interval_tree_remove+0xc75/0xec0 [ 38.630305] vma_prepare+0xc54/0x11a0 [ 38.630779] __split_vma+0x5af/0x950 [ 38.631250] ? __pfx___split_vma+0x10/0x10 [ 38.631778] ? find_held_lock+0x2c/0x110 [ 38.632293] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.632857] ? lock_is_held_type+0x9f/0x120 [ 38.633384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.633983] ? mtree_range_walk+0x632/0x900 [ 38.634526] ? mas_walk+0x5c7/0x7c0 [ 38.634992] do_vmi_munmap+0x1f1/0x2b0 [ 38.635490] mmap_region+0x1f9/0x2660 [ 38.635976] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.636484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.637188] ? __pfx_lock_acquire+0x10/0x10 [ 38.637722] ? __pfx_mmap_region+0x10/0x10 [ 38.638245] ? security_mmap_addr+0x7d/0xa0 [ 38.638768] ? get_unmapped_area+0x1f5/0x3f0 [ 38.639337] do_mmap+0x854/0xf00 [ 38.639768] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.640254] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.640828] ksys_mmap_pgoff+0x3af/0x500 [ 38.641346] do_syscall_64+0x3f/0x90 [ 38.641833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.642495] RIP: 0033:0x7f50774ead82 [ 38.642958] 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 [ 38.645102] RSP: 002b:00007ffd8d3d1c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.646026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50774ead82 [ 38.646885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5076924000 [ 38.647765] RBP: 00007f5076924000 R08: 0000000000000009 R09: 0000000000001000 [ 38.648632] R10: 0000000000000812 R11: 0000000000000206 R12: 000055796377fec0 [ 38.649491] R13: 00007ffd8d3d1ca0 R14: 00007ffd8d3d1cd0 R15: 00007ffd8d3d2030 [ 38.650366] [ 38.650668] [ 38.650885] Allocated by task 213: [ 38.651321] kasan_save_stack+0x22/0x50 [ 38.651834] kasan_set_track+0x25/0x30 [ 38.652334] __kasan_slab_alloc+0x59/0x70 [ 38.652867] kmem_cache_alloc+0x16b/0x370 [ 38.653394] vm_area_dup+0x20/0x160 [ 38.653850] __split_vma+0x170/0x950 [ 38.654314] split_vma+0xc6/0x110 [ 38.654782] mprotect_fixup+0x8d2/0xb30 [ 38.655308] do_mprotect_pkey+0x87e/0xd40 [ 38.655838] __x64_sys_mprotect+0x78/0xc0 [ 38.656358] do_syscall_64+0x3f/0x90 [ 38.656834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.657472] [ 38.657688] Freed by task 203: [ 38.658080] kasan_save_stack+0x22/0x50 [ 38.658582] kasan_set_track+0x25/0x30 [ 38.659084] kasan_save_free_info+0x2b/0x50 [ 38.659626] __kasan_slab_free+0x10a/0x190 [ 38.660161] kmem_cache_free+0x10d/0x4d0 [ 38.660663] rcu_core+0x8c8/0x2860 [ 38.661100] __do_softirq+0x1b7/0x7d4 [ 38.661574] [ 38.661791] Last potentially related work creation: [ 38.662378] kasan_save_stack+0x22/0x50 [ 38.662876] __kasan_record_aux_stack+0x8e/0xa0 [ 38.663457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.664090] remove_vma+0x139/0x170 [ 38.664536] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.665157] do_vmi_munmap+0x1f1/0x2b0 [ 38.665644] __vm_munmap+0x138/0x3a0 [ 38.666109] __x64_sys_munmap+0x59/0x80 [ 38.666598] do_syscall_64+0x3f/0x90 [ 38.667075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.667712] [ 38.667925] The buggy address belongs to the object at ffff888016b582b8 [ 38.667925] which belongs to the cache vm_area_struct of size 168 [ 38.669380] The buggy address is located 88 bytes inside of [ 38.669380] freed 168-byte region [ffff888016b582b8, ffff888016b58360) [ 38.670779] [ 38.670995] The buggy address belongs to the physical page: [ 38.671656] page:0000000031e26026 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b58 [ 38.672737] memcg:ffff88801a407801 [ 38.673160] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.673792] page_type: 0xffffffff() [ 38.674238] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.675169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a407801 [ 38.676062] page dumped because: kasan: bad access detected [ 38.676711] [ 38.676923] Memory state around the buggy address: [ 38.677496] ffff888016b58200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.678339] ffff888016b58280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.679208] >ffff888016b58300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.680047] ^ [ 38.680506] ffff888016b58380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.681357] ffff888016b58400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.682203] ================================================================== [ 38.683240] Disabling lock debugging due to kernel taint [ 40.435447] BUG: Bad rss-counter state mm:00000000c604835f type:MM_FILEPAGES val:33 [ 40.436665] BUG: Bad rss-counter state mm:00000000c604835f type:MM_ANONPAGES val:22 [ 40.901472] BUG: Bad rss-counter state mm:00000000f27d25c3 type:MM_FILEPAGES val:33 [ 40.902649] BUG: Bad rss-counter state mm:00000000f27d25c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59489' (ECDSA) to the list of known hosts. 2023/06/19 17:26:00 fuzzer started 2023/06/19 17:26:00 dialing manager at localhost:44161 2023/06/19 17:26:00 checking machine... 2023/06/19 17:26:00 checking revisions... [ 41.533796] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:26:00 testing simple program... [ 41.593546] cgroup: Unknown subsys name 'net' [ 41.644242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:25:53 Registers: info registers vcpu 0 RAX=ffffffff864b4f3d RBX=0000000000000002 RCX=ffffffff864b4f38 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c969e7 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b4f3c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff81131127 RFL=00000217 [----APC] 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 00007f4c845cf900 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=00007f4c84b870b0 CR3=000000000f1cc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81807f5b RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028d2ecf RSI=ffffffff81807f5b RDI=ffff8880146976e8 RBP=ffff8880146976b8 RSP=ffff888014697618 R8 =0000000000000001 R9 =ffff888014697660 R10=0000000000038001 R11=0000000000021ee6 R12=ffff8880146976e8 R13=0000000000000000 R14=ffff88800dc451c0 R15=ffff88800caa0850 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007f90c693d900 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=00007f90c5d57b50 CR3=0000000013a96000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ef1b353a43047a7500000000000ae988 XMM05=3832adb8f586799f0000000000135bb0 XMM06=19e9129bd510f2350000000000134a68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000