syzkaller login: [ 31.347880] BUG: Bad rss-counter state mm:00000000fd2b5cff type:MM_FILEPAGES val:33 [ 31.349051] BUG: Bad rss-counter state mm:00000000fd2b5cff type:MM_ANONPAGES val:22 [ 31.390435] ================================================================== [ 31.391396] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.392453] Read of size 8 at addr ffff88801035ed08 by task sshd/221 [ 31.393233] [ 31.393453] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.394334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.395322] Call Trace: [ 31.395657] [ 31.395943] dump_stack_lvl+0x91/0xf0 [ 31.396445] print_report+0xcc/0x620 [ 31.396932] ? __virt_addr_valid+0x102/0x340 [ 31.397503] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398127] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398758] kasan_report+0xbe/0xf0 [ 31.399251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.399890] vma_interval_tree_remove+0xc75/0xec0 [ 31.400502] vma_prepare+0xc54/0x11a0 [ 31.400987] __split_vma+0x5af/0x950 [ 31.401489] ? __pfx___split_vma+0x10/0x10 [ 31.402020] ? find_held_lock+0x2c/0x110 [ 31.402544] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.403112] ? lock_is_held_type+0x9f/0x120 [ 31.403655] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.404264] ? mtree_range_walk+0x632/0x900 [ 31.404822] ? mas_walk+0x5c7/0x7c0 [ 31.405309] do_vmi_munmap+0x1f1/0x2b0 [ 31.405812] mmap_region+0x1f9/0x2660 [ 31.406292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.406806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.407529] ? __pfx_lock_acquire+0x10/0x10 [ 31.408069] ? __pfx_mmap_region+0x10/0x10 [ 31.408610] ? security_mmap_addr+0x7d/0xa0 [ 31.409160] ? get_unmapped_area+0x1f5/0x3f0 [ 31.409712] do_mmap+0x854/0xf00 [ 31.410154] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.410649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.411207] ksys_mmap_pgoff+0x3af/0x500 [ 31.411730] do_syscall_64+0x3f/0x90 [ 31.412215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.412863] RIP: 0033:0x7f8cab6dfd82 [ 31.413336] 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 [ 31.415486] RSP: 002b:00007ffd090fc5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.416396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cab6dfd82 [ 31.417255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8caab19000 [ 31.418100] RBP: 00007f8caab19000 R08: 0000000000000009 R09: 0000000000001000 [ 31.418948] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebff640ec0 [ 31.419801] R13: 00007ffd090fc5f0 R14: 00007ffd090fc620 R15: 00007ffd090fc980 [ 31.420658] [ 31.420961] [ 31.421194] Allocated by task 214: [ 31.421631] kasan_save_stack+0x22/0x50 [ 31.422142] kasan_set_track+0x25/0x30 [ 31.422633] __kasan_slab_alloc+0x59/0x70 [ 31.423164] kmem_cache_alloc+0x16b/0x370 [ 31.423685] vm_area_dup+0x20/0x160 [ 31.424147] __split_vma+0x170/0x950 [ 31.424609] split_vma+0xc6/0x110 [ 31.425046] mprotect_fixup+0x8d2/0xb30 [ 31.425555] do_mprotect_pkey+0x87e/0xd40 [ 31.426077] __x64_sys_mprotect+0x78/0xc0 [ 31.426608] do_syscall_64+0x3f/0x90 [ 31.427091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.427746] [ 31.427964] Freed by task 214: [ 31.428357] kasan_save_stack+0x22/0x50 [ 31.428869] kasan_set_track+0x25/0x30 [ 31.429374] kasan_save_free_info+0x2b/0x50 [ 31.429913] __kasan_slab_free+0x10a/0x190 [ 31.430446] kmem_cache_free+0x10d/0x4d0 [ 31.430956] rcu_core+0x8c8/0x2860 [ 31.431408] __do_softirq+0x1b7/0x7d4 [ 31.431889] [ 31.432107] Last potentially related work creation: [ 31.432699] kasan_save_stack+0x22/0x50 [ 31.433234] __kasan_record_aux_stack+0x8e/0xa0 [ 31.433807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.434447] remove_vma+0x139/0x170 [ 31.434900] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.435458] do_vmi_munmap+0x1f1/0x2b0 [ 31.435945] __vm_munmap+0x138/0x3a0 [ 31.436414] __x64_sys_munmap+0x59/0x80 [ 31.436912] do_syscall_64+0x3f/0x90 [ 31.437394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.438037] [ 31.438253] The buggy address belongs to the object at ffff88801035ecb0 [ 31.438253] which belongs to the cache vm_area_struct of size 168 [ 31.439714] The buggy address is located 88 bytes inside of [ 31.439714] freed 168-byte region [ffff88801035ecb0, ffff88801035ed58) [ 31.441108] [ 31.441328] The buggy address belongs to the physical page: [ 31.441986] page:00000000710674c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1035e [ 31.443071] memcg:ffff888016731d01 [ 31.443496] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.444137] page_type: 0xffffffff() [ 31.444584] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.445514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016731d01 [ 31.446498] page dumped because: kasan: bad access detected [ 31.447160] [ 31.447381] Memory state around the buggy address: [ 31.447962] ffff88801035ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.448815] ffff88801035ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.449677] >ffff88801035ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.450532] ^ [ 31.450971] ffff88801035ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.451822] ffff88801035ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.452675] ================================================================== [ 31.453901] Disabling lock debugging due to kernel taint [ 33.434802] BUG: Bad rss-counter state mm:00000000cc439399 type:MM_FILEPAGES val:33 [ 33.436069] BUG: Bad rss-counter state mm:00000000cc439399 type:MM_ANONPAGES val:22 [ 33.943120] BUG: Bad rss-counter state mm:00000000bac1c169 type:MM_FILEPAGES val:33 [ 33.944318] BUG: Bad rss-counter state mm:00000000bac1c169 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61389' (ECDSA) to the list of known hosts. 2023/06/20 13:45:31 fuzzer started 2023/06/20 13:45:31 dialing manager at localhost:36067 2023/06/20 13:45:31 checking machine... 2023/06/20 13:45:31 checking revisions... [ 34.568913] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:45:31 testing simple program... [ 34.618729] cgroup: Unknown subsys name 'net' [ 34.678626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:45:31 Registers: info registers vcpu 0 RAX=ffffffff864abb35 RBX=0000000000000001 RCX=ffffffff864abb34 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018a8f130 RSP=ffff888018a8f068 R8 =ffffffff864abb38 R9 =ffff888018a8f118 R10=0000000000038001 R11=00000000000b3fb2 R12=ffff888018a8f138 R13=ffff888018a8f120 R14=ffff888018a8fb10 R15=ffff888018a8f0d8 RIP=ffffffff81130b99 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 00007fb0830af900 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=00007fb083079008 CR3=0000000008f5c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007ff372910d40 CR3=000000000d96a000 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=20a8cce846e273972d4618a0218d7899 XMM02=2c67c8bc2e329bc3000000000011d388 XMM03=fb795ef6d65770560000000000121a50 XMM04=f21c02998f97e37500000000000ae988 XMM05=e4cb8bb95a7664b60000000000131808 XMM06=3d9b728c7bedaf710000000000130670 XMM07=e042d86d42eb936e0000000000121cd0 XMM08=3c46c169fe65d54a000000000011d3e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000