syzkaller login: [ 31.170240] BUG: Bad rss-counter state mm:0000000063befcaf type:MM_FILEPAGES val:33 [ 31.170879] BUG: Bad rss-counter state mm:0000000063befcaf type:MM_ANONPAGES val:22 [ 31.347540] ================================================================== [ 31.348871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.349917] Read of size 8 at addr ffff88800ce5ba50 by task sshd/220 [ 31.350756] [ 31.351012] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.351955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.353040] Call Trace: [ 31.353388] [ 31.353699] dump_stack_lvl+0x91/0xf0 [ 31.354277] print_report+0xcc/0x620 [ 31.354830] ? __virt_addr_valid+0x102/0x340 [ 31.355459] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356874] kasan_report+0xbe/0xf0 [ 31.357418] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358124] vma_interval_tree_remove+0xc75/0xec0 [ 31.358820] vma_prepare+0xc54/0x11a0 [ 31.359364] __split_vma+0x5af/0x950 [ 31.359902] ? __pfx___split_vma+0x10/0x10 [ 31.360504] ? find_held_lock+0x2c/0x110 [ 31.361126] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.361770] ? lock_is_held_type+0x9f/0x120 [ 31.362390] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.363081] ? mtree_range_walk+0x632/0x900 [ 31.363711] ? mas_walk+0x5c7/0x7c0 [ 31.364259] do_vmi_munmap+0x1f1/0x2b0 [ 31.364826] mmap_region+0x1f9/0x2660 [ 31.365373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.365955] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.366770] ? __pfx_lock_acquire+0x10/0x10 [ 31.367377] ? __pfx_mmap_region+0x10/0x10 [ 31.367983] ? security_mmap_addr+0x7d/0xa0 [ 31.368584] ? get_unmapped_area+0x1f5/0x3f0 [ 31.369222] do_mmap+0x854/0xf00 [ 31.369716] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.370284] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.370919] ksys_mmap_pgoff+0x3af/0x500 [ 31.371491] do_syscall_64+0x3f/0x90 [ 31.372034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372770] RIP: 0033:0x7f547466bd82 [ 31.373266] 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 [ 31.375567] RSP: 002b:00007ffca1b13d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.376548] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f547466bd82 [ 31.377476] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5473aa5000 [ 31.378392] RBP: 00007f5473aa5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.379322] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ab0652ec0 [ 31.380247] R13: 00007ffca1b13d40 R14: 00007ffca1b13d70 R15: 00007ffca1b140d0 [ 31.381194] [ 31.381510] [ 31.381743] Allocated by task 213: [ 31.382213] kasan_save_stack+0x22/0x50 [ 31.382761] kasan_set_track+0x25/0x30 [ 31.383301] __kasan_slab_alloc+0x59/0x70 [ 31.383866] kmem_cache_alloc+0x16b/0x370 [ 31.384433] vm_area_dup+0x20/0x160 [ 31.384933] __split_vma+0x170/0x950 [ 31.385463] split_vma+0xc6/0x110 [ 31.385940] mprotect_fixup+0x8d2/0xb30 [ 31.386482] do_mprotect_pkey+0x87e/0xd40 [ 31.387054] __x64_sys_mprotect+0x78/0xc0 [ 31.387616] do_syscall_64+0x3f/0x90 [ 31.388137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388840] [ 31.389080] Freed by task 213: [ 31.389508] kasan_save_stack+0x22/0x50 [ 31.390061] kasan_set_track+0x25/0x30 [ 31.390606] kasan_save_free_info+0x2b/0x50 [ 31.391192] __kasan_slab_free+0x10a/0x190 [ 31.391766] kmem_cache_free+0x10d/0x4d0 [ 31.392332] rcu_core+0x8c8/0x2860 [ 31.392829] __do_softirq+0x1b7/0x7d4 [ 31.393355] [ 31.393588] Last potentially related work creation: [ 31.394228] kasan_save_stack+0x22/0x50 [ 31.394784] __kasan_record_aux_stack+0x8e/0xa0 [ 31.395409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.396116] remove_vma+0x139/0x170 [ 31.396610] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.397231] do_vmi_munmap+0x1f1/0x2b0 [ 31.397763] __vm_munmap+0x138/0x3a0 [ 31.398279] __x64_sys_munmap+0x59/0x80 [ 31.398823] do_syscall_64+0x3f/0x90 [ 31.399350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.400047] [ 31.400283] The buggy address belongs to the object at ffff88800ce5b9f8 [ 31.400283] which belongs to the cache vm_area_struct of size 168 [ 31.401883] The buggy address is located 88 bytes inside of [ 31.401883] freed 168-byte region [ffff88800ce5b9f8, ffff88800ce5baa0) [ 31.403424] [ 31.403661] The buggy address belongs to the physical page: [ 31.404390] page:000000004a2c962c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xce5b [ 31.405574] memcg:ffff88800e8b8001 [ 31.406044] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.406743] page_type: 0xffffffff() [ 31.407240] raw: 0100000000000200 ffff8880087a0c80 ffffea00003879c0 dead000000000002 [ 31.408250] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8b8001 [ 31.409230] page dumped because: kasan: bad access detected [ 31.409946] [ 31.410176] Memory state around the buggy address: [ 31.410798] ffff88800ce5b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.411723] ffff88800ce5b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.412645] >ffff88800ce5ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.413579] ^ [ 31.414347] ffff88800ce5ba80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.415267] ffff88800ce5bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.416185] ================================================================== [ 31.417348] Disabling lock debugging due to kernel taint [ 33.521123] BUG: Bad rss-counter state mm:000000008abef05d type:MM_FILEPAGES val:33 [ 33.522306] BUG: Bad rss-counter state mm:000000008abef05d type:MM_ANONPAGES val:22 [ 33.929187] BUG: Bad rss-counter state mm:000000000d6bca0a type:MM_FILEPAGES val:33 [ 33.930195] BUG: Bad rss-counter state mm:000000000d6bca0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29606' (ECDSA) to the list of known hosts. 2023/06/20 20:25:16 fuzzer started 2023/06/20 20:25:17 dialing manager at localhost:36067 2023/06/20 20:25:17 checking machine... 2023/06/20 20:25:17 checking revisions... [ 34.684406] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:25:17 testing simple program... [ 34.731223] cgroup: Unknown subsys name 'net' [ 34.791058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:25:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09bd0 RCX=ffffffff860d8256 RDX=1ffff1100d9c1354 RSI=0000000000000000 RDI=ffff88806ce09aa0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09bd0 R15=ffff88806ce09a98 RIP=ffffffff81131c83 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 00007f6a14004900 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=00007f6a134147d0 CR3=000000000c78a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0c7323d26a09fd0200000000000ae988 XMM05=489d011a55032a8400000000001327b8 XMM06=4fda316b135da52b00000000001315a8 XMM07=fb795ef6d65770560000000000121840 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff2ed1 RBX=ffff888009a6f6d0 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f9768c RBP=000000002f5534a2 RSP=ffff8880146cf508 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=0000098900000989 R12=0000000000000000 R13=00000000000000da R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1978 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 00007f62a36f3900 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=00007f62a3caa618 CR3=0000000019f30000 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