syzkaller login: [ 30.257129] BUG: Bad rss-counter state mm:00000000e8bd36a9 type:MM_FILEPAGES val:33 [ 30.258590] BUG: Bad rss-counter state mm:00000000e8bd36a9 type:MM_ANONPAGES val:22 [ 30.359383] ================================================================== [ 30.360281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.361217] Read of size 8 at addr ffff888019317c20 by task sshd/219 [ 30.361997] [ 30.362218] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.363196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.364165] Call Trace: [ 30.364485] [ 30.364769] dump_stack_lvl+0x91/0xf0 [ 30.365262] print_report+0xcc/0x620 [ 30.365771] ? __virt_addr_valid+0x102/0x340 [ 30.366316] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.366930] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.367541] kasan_report+0xbe/0xf0 [ 30.368016] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.368670] vma_interval_tree_remove+0xc75/0xec0 [ 30.369276] vma_prepare+0xc54/0x11a0 [ 30.369761] __split_vma+0x5af/0x950 [ 30.370238] ? __pfx___split_vma+0x10/0x10 [ 30.370776] ? find_held_lock+0x2c/0x110 [ 30.371301] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.371868] ? lock_is_held_type+0x9f/0x120 [ 30.372406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.373007] ? mtree_range_walk+0x632/0x900 [ 30.373557] ? mas_walk+0x5c7/0x7c0 [ 30.374026] do_vmi_munmap+0x1f1/0x2b0 [ 30.374510] mmap_region+0x1f9/0x2660 [ 30.374986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.375504] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.376223] ? __pfx_lock_acquire+0x10/0x10 [ 30.376755] ? __pfx_mmap_region+0x10/0x10 [ 30.377286] ? security_mmap_addr+0x7d/0xa0 [ 30.377835] ? get_unmapped_area+0x1f5/0x3f0 [ 30.378378] do_mmap+0x854/0xf00 [ 30.378812] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.379308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.379865] ksys_mmap_pgoff+0x3af/0x500 [ 30.380373] do_syscall_64+0x3f/0x90 [ 30.380854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.381507] RIP: 0033:0x7fd8911a0d82 [ 30.381961] 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 [ 30.384074] RSP: 002b:00007ffdd8555738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.384969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8911a0d82 [ 30.385830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8905da000 [ 30.386675] RBP: 00007fd8905da000 R08: 0000000000000009 R09: 0000000000001000 [ 30.387507] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610f16cdec0 [ 30.388352] R13: 00007ffdd8555750 R14: 00007ffdd8555780 R15: 00007ffdd8555ae0 [ 30.389200] [ 30.389506] [ 30.389717] Allocated by task 212: [ 30.390141] kasan_save_stack+0x22/0x50 [ 30.390648] kasan_set_track+0x25/0x30 [ 30.391142] __kasan_slab_alloc+0x59/0x70 [ 30.391670] kmem_cache_alloc+0x16b/0x370 [ 30.392181] vm_area_dup+0x20/0x160 [ 30.392630] __split_vma+0x170/0x950 [ 30.393091] split_vma+0xc6/0x110 [ 30.393534] mprotect_fixup+0x8d2/0xb30 [ 30.394038] do_mprotect_pkey+0x87e/0xd40 [ 30.394560] __x64_sys_mprotect+0x78/0xc0 [ 30.395079] do_syscall_64+0x3f/0x90 [ 30.395549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396187] [ 30.396403] Freed by task 212: [ 30.396793] kasan_save_stack+0x22/0x50 [ 30.397291] kasan_set_track+0x25/0x30 [ 30.397800] kasan_save_free_info+0x2b/0x50 [ 30.398330] __kasan_slab_free+0x10a/0x190 [ 30.398863] kmem_cache_free+0x10d/0x4d0 [ 30.399371] rcu_core+0x8c8/0x2860 [ 30.399809] __do_softirq+0x1b7/0x7d4 [ 30.400285] [ 30.400498] Last potentially related work creation: [ 30.401082] kasan_save_stack+0x22/0x50 [ 30.401613] __kasan_record_aux_stack+0x8e/0xa0 [ 30.402186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.402819] remove_vma+0x139/0x170 [ 30.403262] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.403883] do_vmi_munmap+0x1f1/0x2b0 [ 30.404366] __vm_munmap+0x138/0x3a0 [ 30.404834] __x64_sys_munmap+0x59/0x80 [ 30.405324] do_syscall_64+0x3f/0x90 [ 30.405816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.406456] [ 30.406669] The buggy address belongs to the object at ffff888019317bc8 [ 30.406669] which belongs to the cache vm_area_struct of size 168 [ 30.408130] The buggy address is located 88 bytes inside of [ 30.408130] freed 168-byte region [ffff888019317bc8, ffff888019317c70) [ 30.409543] [ 30.409758] The buggy address belongs to the physical page: [ 30.410421] page:000000005be11674 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19317 [ 30.411514] memcg:ffff88800ef18901 [ 30.411935] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.412576] page_type: 0xffffffff() [ 30.413027] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.413948] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef18901 [ 30.414857] page dumped because: kasan: bad access detected [ 30.415521] [ 30.415733] Memory state around the buggy address: [ 30.416303] ffff888019317b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.417149] ffff888019317b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.418047] >ffff888019317c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.418884] ^ [ 30.419409] ffff888019317c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.420266] ffff888019317d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.421110] ================================================================== [ 30.422033] Disabling lock debugging due to kernel taint [ 33.139792] BUG: Bad rss-counter state mm:00000000e66f48f7 type:MM_FILEPAGES val:33 [ 33.140967] BUG: Bad rss-counter state mm:00000000e66f48f7 type:MM_ANONPAGES val:22 [ 33.516084] BUG: Bad rss-counter state mm:0000000065035346 type:MM_FILEPAGES val:33 [ 33.517311] BUG: Bad rss-counter state mm:0000000065035346 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54094' (ECDSA) to the list of known hosts. 2023/06/21 01:21:40 fuzzer started 2023/06/21 01:21:40 dialing manager at localhost:36067 2023/06/21 01:21:40 checking machine... 2023/06/21 01:21:40 checking revisions... [ 34.275457] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:21:41 testing simple program... [ 34.330675] cgroup: Unknown subsys name 'net' [ 34.385942] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:21:40 Registers: info registers vcpu 0 RAX=ffff8880168c0100 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110011fd1d4 RSI=ffffffff8386ed8f RDI=0000000000000005 RBP=ffff88801be27d90 RSP=ffff88801be27c98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff84d65520 R13=ffff88801950e1e0 R14=0000000000000000 R15=ffff888009d74000 RIP=ffffffff8386edb8 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 00007f4cfa3b7900 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=00007ffd2fb5b000 CR3=000000000fc90000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1cf1113910 CR3=000000000cc76000 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=027952fcd90ab2801f43bea36e6ca86f XMM02=2c67c8bc2e329bc3000000000011d990 XMM03=fb795ef6d65770560000000000122020 XMM04=e87992521c19a54e00000000000ae988 XMM05=6dd9b7a83e2234210000000000132378 XMM06=806171799158d9670000000000131d70 XMM07=e042d86d42eb936e00000000001222a0 XMM08=e94c41ec66ae3f65000000000011d9f0 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000