syzkaller login: [ 30.148739] BUG: Bad rss-counter state mm:00000000d33ed06b type:MM_FILEPAGES val:33 [ 30.150104] BUG: Bad rss-counter state mm:00000000d33ed06b type:MM_ANONPAGES val:22 [ 30.299195] ================================================================== [ 30.300111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.301068] Read of size 8 at addr ffff888019993228 by task sshd/221 [ 30.301924] [ 30.302160] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.303062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.304068] Call Trace: [ 30.304393] [ 30.304680] dump_stack_lvl+0x91/0xf0 [ 30.305195] print_report+0xcc/0x620 [ 30.305685] ? __virt_addr_valid+0x102/0x340 [ 30.306264] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.306920] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.307554] kasan_report+0xbe/0xf0 [ 30.308053] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.308679] vma_interval_tree_remove+0xc75/0xec0 [ 30.309301] vma_prepare+0xc54/0x11a0 [ 30.309787] __split_vma+0x5af/0x950 [ 30.310289] ? __pfx___split_vma+0x10/0x10 [ 30.310829] ? find_held_lock+0x2c/0x110 [ 30.311385] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.311967] ? lock_is_held_type+0x9f/0x120 [ 30.312519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.313151] ? mtree_range_walk+0x632/0x900 [ 30.313713] ? mas_walk+0x5c7/0x7c0 [ 30.314217] do_vmi_munmap+0x1f1/0x2b0 [ 30.314726] mmap_region+0x1f9/0x2660 [ 30.315256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.315780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.316505] ? __pfx_lock_acquire+0x10/0x10 [ 30.317064] ? __pfx_mmap_region+0x10/0x10 [ 30.317606] ? security_mmap_addr+0x7d/0xa0 [ 30.318170] ? get_unmapped_area+0x1f5/0x3f0 [ 30.318725] do_mmap+0x854/0xf00 [ 30.319187] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.319712] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.320293] ksys_mmap_pgoff+0x3af/0x500 [ 30.320821] do_syscall_64+0x3f/0x90 [ 30.321323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.322007] RIP: 0033:0x7f7b8c6aad82 [ 30.322473] 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 [ 30.324684] RSP: 002b:00007ffe85143b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.325616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b8c6aad82 [ 30.326505] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b8bae4000 [ 30.327425] RBP: 00007f7b8bae4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.328311] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640ea96fec0 [ 30.329199] R13: 00007ffe85143ba0 R14: 00007ffe85143bd0 R15: 00007ffe85143f30 [ 30.330095] [ 30.330393] [ 30.330618] Allocated by task 214: [ 30.331094] kasan_save_stack+0x22/0x50 [ 30.331611] kasan_set_track+0x25/0x30 [ 30.332133] __kasan_slab_alloc+0x59/0x70 [ 30.332678] kmem_cache_alloc+0x16b/0x370 [ 30.333210] vm_area_dup+0x20/0x160 [ 30.333665] __split_vma+0x170/0x950 [ 30.334165] split_vma+0xc6/0x110 [ 30.334625] mprotect_fixup+0x8d2/0xb30 [ 30.335159] do_mprotect_pkey+0x87e/0xd40 [ 30.335695] __x64_sys_mprotect+0x78/0xc0 [ 30.336234] do_syscall_64+0x3f/0x90 [ 30.336719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337363] [ 30.337581] Freed by task 214: [ 30.337976] kasan_save_stack+0x22/0x50 [ 30.338487] kasan_set_track+0x25/0x30 [ 30.339016] kasan_save_free_info+0x2b/0x50 [ 30.339565] __kasan_slab_free+0x10a/0x190 [ 30.340105] kmem_cache_free+0x10d/0x4d0 [ 30.340613] rcu_core+0x8c8/0x2860 [ 30.341069] __do_softirq+0x1b7/0x7d4 [ 30.341547] [ 30.341771] Last potentially related work creation: [ 30.342368] kasan_save_stack+0x22/0x50 [ 30.342883] __kasan_record_aux_stack+0x8e/0xa0 [ 30.343458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.344122] remove_vma+0x139/0x170 [ 30.344577] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.345135] do_vmi_munmap+0x1f1/0x2b0 [ 30.345622] __vm_munmap+0x138/0x3a0 [ 30.346089] __x64_sys_munmap+0x59/0x80 [ 30.346594] do_syscall_64+0x3f/0x90 [ 30.347075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347723] [ 30.347942] The buggy address belongs to the object at ffff8880199931d0 [ 30.347942] which belongs to the cache vm_area_struct of size 168 [ 30.349408] The buggy address is located 88 bytes inside of [ 30.349408] freed 168-byte region [ffff8880199931d0, ffff888019993278) [ 30.350815] [ 30.351057] The buggy address belongs to the physical page: [ 30.351724] page:0000000073468887 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19993 [ 30.352816] memcg:ffff888019b61f01 [ 30.353248] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.353896] page_type: 0xffffffff() [ 30.354351] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.355291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b61f01 [ 30.356209] page dumped because: kasan: bad access detected [ 30.356884] [ 30.357103] Memory state around the buggy address: [ 30.357696] ffff888019993100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.358561] ffff888019993180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.359445] >ffff888019993200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.360308] ^ [ 30.360884] ffff888019993280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.361761] ffff888019993300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.362613] ================================================================== [ 30.363756] Disabling lock debugging due to kernel taint [ 32.154023] BUG: Bad rss-counter state mm:000000007f6b034f type:MM_FILEPAGES val:33 [ 32.154916] BUG: Bad rss-counter state mm:000000007f6b034f type:MM_ANONPAGES val:22 [ 32.689188] BUG: Bad rss-counter state mm:0000000008a617b3 type:MM_FILEPAGES val:33 [ 32.690386] BUG: Bad rss-counter state mm:0000000008a617b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1284' (ECDSA) to the list of known hosts. 2023/06/21 07:27:19 fuzzer started 2023/06/21 07:27:19 dialing manager at localhost:36067 2023/06/21 07:27:19 checking machine... 2023/06/21 07:27:19 checking revisions... [ 33.332107] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:27:19 testing simple program... [ 33.376542] cgroup: Unknown subsys name 'net' [ 33.423541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:27:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff86138976 RDX=1ffff1100d9c1353 RSI=ffff88806ce09e60 RDI=ffff88806ce09a98 RBP=ffff88806ce09e60 RSP=ffff88806ce099f8 R8 =ffffffff8613897a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09e68 R15=ffff88806ce09a98 RIP=ffffffff81130412 RFL=00000216 [----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 0000000000000000 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=00007ffedd8fefe8 CR3=0000000005482000 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=00007fe80e2955100000558a597ae790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002c88f4b RSI=ffffffff83650bf8 RDI=ffff888016447ac8 RBP=ffff888016447a98 RSP=ffff8880164479f8 R8 =0000000000000001 R9 =ffff888016447a40 R10=0000000000038001 R11=000000000008ad19 R12=ffff888016447ac8 R13=0000000000000000 R14=ffff888016ab0000 R15=ffff88800cf8d390 RIP=ffffffff813ad47e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f111bfe6900 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=00007f111c59d618 CR3=000000000d6a6000 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