syzkaller login: [ 30.627656] BUG: Bad rss-counter state mm:000000004e31324c type:MM_FILEPAGES val:33 [ 30.628840] BUG: Bad rss-counter state mm:000000004e31324c type:MM_ANONPAGES val:22 [ 30.780749] ================================================================== [ 30.781647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.782597] Read of size 8 at addr ffff888016ada310 by task sshd/221 [ 30.783465] [ 30.783681] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.784542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.785541] Call Trace: [ 30.785887] [ 30.786177] dump_stack_lvl+0x91/0xf0 [ 30.786666] print_report+0xcc/0x620 [ 30.787144] ? __virt_addr_valid+0x102/0x340 [ 30.787701] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788305] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788920] kasan_report+0xbe/0xf0 [ 30.789402] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790029] vma_interval_tree_remove+0xc75/0xec0 [ 30.790629] vma_prepare+0xc54/0x11a0 [ 30.791101] __split_vma+0x5af/0x950 [ 30.791563] ? __pfx___split_vma+0x10/0x10 [ 30.792078] ? find_held_lock+0x2c/0x110 [ 30.792592] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.793152] ? lock_is_held_type+0x9f/0x120 [ 30.793687] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.794297] ? mtree_range_walk+0x632/0x900 [ 30.794847] ? mas_walk+0x5c7/0x7c0 [ 30.795315] do_vmi_munmap+0x1f1/0x2b0 [ 30.795803] mmap_region+0x1f9/0x2660 [ 30.796280] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.796790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.797494] ? __pfx_lock_acquire+0x10/0x10 [ 30.798046] ? __pfx_mmap_region+0x10/0x10 [ 30.798576] ? security_mmap_addr+0x7d/0xa0 [ 30.799104] ? get_unmapped_area+0x1f5/0x3f0 [ 30.799653] do_mmap+0x854/0xf00 [ 30.800100] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.800594] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.801159] ksys_mmap_pgoff+0x3af/0x500 [ 30.801661] do_syscall_64+0x3f/0x90 [ 30.802152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802795] RIP: 0033:0x7f0647b9ad82 [ 30.803245] 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 [ 30.805324] RSP: 002b:00007ffffdddcac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.806243] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0647b9ad82 [ 30.807075] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0646fd4000 [ 30.807909] RBP: 00007f0646fd4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.808745] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603036ffec0 [ 30.809574] R13: 00007ffffdddcae0 R14: 00007ffffdddcb10 R15: 00007ffffdddce70 [ 30.810421] [ 30.810719] [ 30.810936] Allocated by task 214: [ 30.811357] kasan_save_stack+0x22/0x50 [ 30.811861] kasan_set_track+0x25/0x30 [ 30.812342] __kasan_slab_alloc+0x59/0x70 [ 30.812861] kmem_cache_alloc+0x16b/0x370 [ 30.813364] vm_area_dup+0x20/0x160 [ 30.813814] __split_vma+0x170/0x950 [ 30.814277] split_vma+0xc6/0x110 [ 30.814721] mprotect_fixup+0x8d2/0xb30 [ 30.815213] do_mprotect_pkey+0x87e/0xd40 [ 30.815723] __x64_sys_mprotect+0x78/0xc0 [ 30.816239] do_syscall_64+0x3f/0x90 [ 30.816706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817348] [ 30.817566] Freed by task 214: [ 30.817971] kasan_save_stack+0x22/0x50 [ 30.818469] kasan_set_track+0x25/0x30 [ 30.818953] kasan_save_free_info+0x2b/0x50 [ 30.819483] __kasan_slab_free+0x10a/0x190 [ 30.820010] kmem_cache_free+0x10d/0x4d0 [ 30.820508] rcu_core+0x8c8/0x2860 [ 30.820946] __do_softirq+0x1b7/0x7d4 [ 30.821417] [ 30.821629] Last potentially related work creation: [ 30.822221] kasan_save_stack+0x22/0x50 [ 30.822713] __kasan_record_aux_stack+0x8e/0xa0 [ 30.823279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823912] remove_vma+0x139/0x170 [ 30.824351] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824898] do_vmi_munmap+0x1f1/0x2b0 [ 30.825381] __vm_munmap+0x138/0x3a0 [ 30.825862] __x64_sys_munmap+0x59/0x80 [ 30.826357] do_syscall_64+0x3f/0x90 [ 30.826830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827475] [ 30.827687] The buggy address belongs to the object at ffff888016ada2b8 [ 30.827687] which belongs to the cache vm_area_struct of size 168 [ 30.829150] The buggy address is located 88 bytes inside of [ 30.829150] freed 168-byte region [ffff888016ada2b8, ffff888016ada360) [ 30.830547] [ 30.830758] The buggy address belongs to the physical page: [ 30.831416] page:0000000036b9deee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ada [ 30.832570] memcg:ffff88801a3b9d01 [ 30.833006] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833668] page_type: 0xffffffff() [ 30.834158] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.835110] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3b9d01 [ 30.836041] page dumped because: kasan: bad access detected [ 30.836725] [ 30.836944] Memory state around the buggy address: [ 30.837540] ffff888016ada200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.838418] ffff888016ada280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.839295] >ffff888016ada300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.840176] ^ [ 30.840650] ffff888016ada380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.841524] ffff888016ada400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.842415] ================================================================== [ 30.843400] Disabling lock debugging due to kernel taint [ 32.453201] BUG: Bad rss-counter state mm:000000000a19d5b2 type:MM_FILEPAGES val:33 [ 32.454220] BUG: Bad rss-counter state mm:000000000a19d5b2 type:MM_ANONPAGES val:22 [ 32.908369] BUG: Bad rss-counter state mm:000000006f502043 type:MM_FILEPAGES val:33 [ 32.909534] BUG: Bad rss-counter state mm:000000006f502043 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61310' (ECDSA) to the list of known hosts. 2023/06/20 21:00:03 fuzzer started 2023/06/20 21:00:03 dialing manager at localhost:36067 2023/06/20 21:00:03 checking machine... 2023/06/20 21:00:03 checking revisions... [ 33.627999] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:00:03 testing simple program... [ 33.680094] cgroup: Unknown subsys name 'net' [ 33.717990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880102ff270 RSP=ffff8880102ff1a8 R8 =ffffffff860d825a R9 =ffff8880102ff258 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880102ff278 R13=ffff8880102ff260 R14=ffff8880102ff350 R15=ffff8880102ff218 RIP=ffffffff81131266 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 00007f1cf5d6a900 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=00007f1cf51d9ba0 CR3=000000000d8a0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a637929326281c2600000000000ae988 XMM05=8de50dbe027d55b90000000000134408 XMM06=e4cb8bb95a7664b60000000000133550 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b325f RBX=0000000000000001 RCX=ffffffff863b325a RDX=0000000000000002 RSI=0000000000000007 RDI=ffffffff85fa4d24 RBP=ffff888010387a00 RSP=ffff888010387938 R8 =ffffffff863b3218 R9 =ffff8880103879e8 R10=0000000000038001 R11=000000000008a8d8 R12=ffff888010387a08 R13=ffff8880103879f0 R14=ffff8880103879e9 R15=ffff8880103879a8 RIP=ffffffff81130a72 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 00007f208167e900 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=00007f2081c35618 CR3=000000000e750000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000