syzkaller login: [ 61.301746] BUG: Bad rss-counter state mm:00000000181a94f1 type:MM_FILEPAGES val:33 [ 61.302771] BUG: Bad rss-counter state mm:00000000181a94f1 type:MM_ANONPAGES val:22 [ 61.340277] ================================================================== [ 61.341394] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.342469] Read of size 8 at addr ffff88801851bb38 by task sshd/225 [ 61.343433] [ 61.343698] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.344614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.345738] Call Trace: [ 61.346148] [ 61.346461] dump_stack_lvl+0x91/0xf0 [ 61.347018] print_report+0xcc/0x620 [ 61.347587] ? __virt_addr_valid+0x102/0x340 [ 61.348239] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.348944] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.349664] kasan_report+0xbe/0xf0 [ 61.350135] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.350976] vma_interval_tree_remove+0xc75/0xec0 [ 61.351591] vma_prepare+0xc54/0x11a0 [ 61.352071] __split_vma+0x5af/0x950 [ 61.352535] ? __pfx___split_vma+0x10/0x10 [ 61.353058] ? find_held_lock+0x2c/0x110 [ 61.353576] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.354136] ? lock_is_held_type+0x9f/0x120 [ 61.354673] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.355273] ? mtree_range_walk+0x632/0x900 [ 61.355816] ? mas_walk+0x5c7/0x7c0 [ 61.356288] do_vmi_munmap+0x1f1/0x2b0 [ 61.356780] mmap_region+0x1f9/0x2660 [ 61.357254] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.357753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.358462] ? __pfx_lock_acquire+0x10/0x10 [ 61.359008] ? __pfx_mmap_region+0x10/0x10 [ 61.359531] ? security_mmap_addr+0x7d/0xa0 [ 61.360058] ? get_unmapped_area+0x1f5/0x3f0 [ 61.360601] do_mmap+0x854/0xf00 [ 61.361035] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.361528] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.362091] ksys_mmap_pgoff+0x3af/0x500 [ 61.362599] do_syscall_64+0x3f/0x90 [ 61.363074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.363718] RIP: 0033:0x7ff1c3af8d82 [ 61.364172] 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 [ 61.366274] RSP: 002b:00007ffcd85accf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.367175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1c3af8d82 [ 61.368021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1c2f32000 [ 61.368855] RBP: 00007ff1c2f32000 R08: 0000000000000009 R09: 0000000000001000 [ 61.369688] R10: 0000000000000812 R11: 0000000000000206 R12: 000056340a99eb20 [ 61.370524] R13: 00007ffcd85acd10 R14: 00007ffcd85acd40 R15: 00007ffcd85ad0a0 [ 61.371388] [ 61.371676] [ 61.371892] Allocated by task 218: [ 61.372312] kasan_save_stack+0x22/0x50 [ 61.372812] kasan_set_track+0x25/0x30 [ 61.373303] __kasan_slab_alloc+0x59/0x70 [ 61.373821] kmem_cache_alloc+0x16b/0x370 [ 61.374332] vm_area_dup+0x20/0x160 [ 61.374792] __split_vma+0x170/0x950 [ 61.375255] split_vma+0xc6/0x110 [ 61.375700] mprotect_fixup+0x8d2/0xb30 [ 61.376196] do_mprotect_pkey+0x87e/0xd40 [ 61.376709] __x64_sys_mprotect+0x78/0xc0 [ 61.377227] do_syscall_64+0x3f/0x90 [ 61.377690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.378345] [ 61.378560] Freed by task 218: [ 61.378966] kasan_save_stack+0x22/0x50 [ 61.379469] kasan_set_track+0x25/0x30 [ 61.379961] kasan_save_free_info+0x2b/0x50 [ 61.380491] __kasan_slab_free+0x10a/0x190 [ 61.381019] kmem_cache_free+0x10d/0x4d0 [ 61.381524] rcu_core+0x8c8/0x2860 [ 61.381967] __do_softirq+0x1b7/0x7d4 [ 61.382440] [ 61.382664] Last potentially related work creation: [ 61.383253] kasan_save_stack+0x22/0x50 [ 61.383764] __kasan_record_aux_stack+0x8e/0xa0 [ 61.384339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.384978] remove_vma+0x139/0x170 [ 61.385507] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.386074] do_vmi_munmap+0x1f1/0x2b0 [ 61.386552] __vm_munmap+0x138/0x3a0 [ 61.387036] __x64_sys_munmap+0x59/0x80 [ 61.387523] do_syscall_64+0x3f/0x90 [ 61.387993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.388625] [ 61.388837] The buggy address belongs to the object at ffff88801851bae0 [ 61.388837] which belongs to the cache vm_area_struct of size 168 [ 61.390361] The buggy address is located 88 bytes inside of [ 61.390361] freed 168-byte region [ffff88801851bae0, ffff88801851bb88) [ 61.391767] [ 61.391974] The buggy address belongs to the physical page: [ 61.392612] page:00000000b86ebecf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1851b [ 61.393659] memcg:ffff88800db64d01 [ 61.394067] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.394741] page_type: 0xffffffff() [ 61.395271] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.396244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db64d01 [ 61.397243] page dumped because: kasan: bad access detected [ 61.397917] [ 61.398162] Memory state around the buggy address: [ 61.398849] ffff88801851ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.399775] ffff88801851ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 61.400651] >ffff88801851bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.401501] ^ [ 61.402119] ffff88801851bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.403120] ffff88801851bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.404030] ================================================================== [ 61.405233] Disabling lock debugging due to kernel taint [ 63.569915] BUG: Bad rss-counter state mm:0000000017f26a41 type:MM_FILEPAGES val:33 [ 63.570998] BUG: Bad rss-counter state mm:0000000017f26a41 type:MM_ANONPAGES val:22 [ 64.063448] BUG: Bad rss-counter state mm:00000000162b14ff type:MM_FILEPAGES val:33 [ 64.064566] BUG: Bad rss-counter state mm:00000000162b14ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37423' (ECDSA) to the list of known hosts. 2023/06/20 23:51:43 fuzzer started 2023/06/20 23:51:44 dialing manager at localhost:36067 2023/06/20 23:51:44 checking machine... 2023/06/20 23:51:44 checking revisions... [ 64.723746] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:51:44 testing simple program... [ 64.763590] cgroup: Unknown subsys name 'net' [ 64.806565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:51:43 Registers: info registers vcpu 0 RAX=000000000003de00 RBX=0000000000092cc0 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888018487b50 RSP=ffff888018487a90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000246 R15=ffff88806ce3de00 RIP=ffffffff81806def RFL=00000002 [-------] 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 00007f4213a48900 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=00007f4213fff618 CR3=0000000009714000 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=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 info registers vcpu 1 RAX=1ffffffff0bb1d6e RBX=ffffffff85d8eb70 RCX=ffffffff81102613 RDX=0000000000000000 RSI=ffffffff86091f84 RDI=ffffffff85d8eb6c RBP=ffffffff85d8eb6c RSP=ffff88806cf099e0 R8 =ffffffff86091f84 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffffffff85d8eb78 R13=ffffffff85d8eb6c R14=ffffffff85d8eb6c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 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=00007f9892a873c0 CR3=000000000d83c000 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=f8550afabad620949e4163d633597ee7 XMM02=000000000011af18ec2efd57dc4c00df XMM03=00000000001218d8389e9832f40d32b6 XMM04=00b41722e1c8827500000000000ae988 XMM05=e7a3b750822471340000000000131480 XMM06=c7637b7cd4b5beb30000000000130658 XMM07=e042d86d42eb936e0000000000121bb0 XMM08=389e9832f40d32b6000000000011af78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000