syzkaller login: [ 30.191504] BUG: Bad rss-counter state mm:00000000b14011de type:MM_FILEPAGES val:33 [ 30.192714] BUG: Bad rss-counter state mm:00000000b14011de type:MM_ANONPAGES val:22 [ 30.229711] ================================================================== [ 30.230637] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.231726] Read of size 8 at addr ffff888015a7fc20 by task sshd/219 [ 30.232500] [ 30.232717] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.233596] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.234590] Call Trace: [ 30.234940] [ 30.235227] dump_stack_lvl+0x91/0xf0 [ 30.235721] print_report+0xcc/0x620 [ 30.236211] ? __virt_addr_valid+0x102/0x340 [ 30.236760] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.237380] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238014] kasan_report+0xbe/0xf0 [ 30.238510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239156] vma_interval_tree_remove+0xc75/0xec0 [ 30.239758] vma_prepare+0xc54/0x11a0 [ 30.240247] __split_vma+0x5af/0x950 [ 30.240720] ? __pfx___split_vma+0x10/0x10 [ 30.241250] ? find_held_lock+0x2c/0x110 [ 30.241770] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.242341] ? lock_is_held_type+0x9f/0x120 [ 30.242881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.243502] ? mtree_range_walk+0x632/0x900 [ 30.244061] ? mas_walk+0x5c7/0x7c0 [ 30.244544] do_vmi_munmap+0x1f1/0x2b0 [ 30.245037] mmap_region+0x1f9/0x2660 [ 30.245521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.246030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.246740] ? __pfx_lock_acquire+0x10/0x10 [ 30.247291] ? __pfx_mmap_region+0x10/0x10 [ 30.247824] ? security_mmap_addr+0x7d/0xa0 [ 30.248355] ? get_unmapped_area+0x1f5/0x3f0 [ 30.248910] do_mmap+0x854/0xf00 [ 30.249348] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.249846] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.250407] ksys_mmap_pgoff+0x3af/0x500 [ 30.250933] do_syscall_64+0x3f/0x90 [ 30.251415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.252059] RIP: 0033:0x7fc0a0209d82 [ 30.252518] 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 [ 30.254659] RSP: 002b:00007ffd7ab3b8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.255588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0a0209d82 [ 30.256469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc09f643000 [ 30.257550] RBP: 00007fc09f643000 R08: 0000000000000009 R09: 0000000000001000 [ 30.258428] R10: 0000000000000812 R11: 0000000000000206 R12: 000056317bff1ec0 [ 30.259320] R13: 00007ffd7ab3b910 R14: 00007ffd7ab3b940 R15: 00007ffd7ab3bca0 [ 30.260193] [ 30.260494] [ 30.260712] Allocated by task 212: [ 30.261154] kasan_save_stack+0x22/0x50 [ 30.261665] kasan_set_track+0x25/0x30 [ 30.262167] __kasan_slab_alloc+0x59/0x70 [ 30.262707] kmem_cache_alloc+0x16b/0x370 [ 30.263248] vm_area_dup+0x20/0x160 [ 30.263711] __split_vma+0x170/0x950 [ 30.264194] split_vma+0xc6/0x110 [ 30.264638] mprotect_fixup+0x8d2/0xb30 [ 30.265151] do_mprotect_pkey+0x87e/0xd40 [ 30.265681] __x64_sys_mprotect+0x78/0xc0 [ 30.266218] do_syscall_64+0x3f/0x90 [ 30.266700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267368] [ 30.267587] Freed by task 212: [ 30.267980] kasan_save_stack+0x22/0x50 [ 30.268486] kasan_set_track+0x25/0x30 [ 30.268984] kasan_save_free_info+0x2b/0x50 [ 30.269521] __kasan_slab_free+0x10a/0x190 [ 30.270057] kmem_cache_free+0x10d/0x4d0 [ 30.270563] rcu_core+0x8c8/0x2860 [ 30.271014] __do_softirq+0x1b7/0x7d4 [ 30.271500] [ 30.271717] Last potentially related work creation: [ 30.272315] kasan_save_stack+0x22/0x50 [ 30.272818] __kasan_record_aux_stack+0x8e/0xa0 [ 30.273393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.274061] remove_vma+0x139/0x170 [ 30.274519] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.275106] do_vmi_munmap+0x1f1/0x2b0 [ 30.275602] __vm_munmap+0x138/0x3a0 [ 30.276076] __x64_sys_munmap+0x59/0x80 [ 30.276588] do_syscall_64+0x3f/0x90 [ 30.277067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.277713] [ 30.277926] The buggy address belongs to the object at ffff888015a7fbc8 [ 30.277926] which belongs to the cache vm_area_struct of size 168 [ 30.279405] The buggy address is located 88 bytes inside of [ 30.279405] freed 168-byte region [ffff888015a7fbc8, ffff888015a7fc70) [ 30.280806] [ 30.281023] The buggy address belongs to the physical page: [ 30.281685] page:000000007ff82cc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a7f [ 30.282788] memcg:ffff888015bf5901 [ 30.283229] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.283875] page_type: 0xffffffff() [ 30.284338] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.285263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bf5901 [ 30.286172] page dumped because: kasan: bad access detected [ 30.286831] [ 30.287063] Memory state around the buggy address: [ 30.287652] ffff888015a7fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.288519] ffff888015a7fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.289392] >ffff888015a7fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.290243] ^ [ 30.290776] ffff888015a7fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.291639] ffff888015a7fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.292483] ================================================================== [ 30.293667] Disabling lock debugging due to kernel taint [ 32.048776] BUG: Bad rss-counter state mm:0000000081bd2c5b type:MM_FILEPAGES val:33 [ 32.049704] BUG: Bad rss-counter state mm:0000000081bd2c5b type:MM_ANONPAGES val:22 [ 32.535872] BUG: Bad rss-counter state mm:00000000b23acf3a type:MM_FILEPAGES val:33 [ 32.537418] BUG: Bad rss-counter state mm:00000000b23acf3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6629' (ECDSA) to the list of known hosts. 2023/06/20 11:42:34 fuzzer started 2023/06/20 11:42:34 dialing manager at localhost:36067 2023/06/20 11:42:34 checking machine... 2023/06/20 11:42:34 checking revisions... [ 33.261354] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:42:34 testing simple program... [ 33.312519] cgroup: Unknown subsys name 'net' [ 33.358378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:42:34 Registers: info registers vcpu 0 RAX=ffffffff8451105e RBX=ffffffff813ad470 RCX=ffffffff860a1401 RDX=1ffff1100d9c135e RSI=ffffffff8451105e RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801a243a00 RIP=ffffffff813ad474 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 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=00007ffc6a64bae8 CR3=000000000e5f8000 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=2034333a32343a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a32343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000202 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800c427d10 RBP=ffff88800c427d10 RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800c427da0 R13=ffff88800c427d50 R14=ffffffff818d9c06 R15=ffff888010244d00 RIP=ffffffff812e0432 RFL=00000082 [--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 00007fe0d9775900 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=00007fe0d9d2c618 CR3=000000000e1fc000 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