[ 30.927502] BUG: Bad rss-counter state mm:000000002453f03a type:MM_FILEPAGES val:33 [ 30.928528] BUG: Bad rss-counter state mm:000000002453f03a type:MM_ANONPAGES val:22 [ 31.106577] ================================================================== [ 31.107584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.108727] Read of size 8 at addr ffff88800e5945c8 by task sshd/220 [ 31.109567] [ 31.109808] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.110915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.112160] Call Trace: [ 31.112562] [ 31.112930] dump_stack_lvl+0x91/0xf0 [ 31.113553] print_report+0xcc/0x620 [ 31.114178] ? __virt_addr_valid+0x102/0x340 [ 31.114924] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115760] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.116585] kasan_report+0xbe/0xf0 [ 31.117227] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.118075] vma_interval_tree_remove+0xc75/0xec0 [ 31.118923] vma_prepare+0xc54/0x11a0 [ 31.119549] __split_vma+0x5af/0x950 [ 31.120087] ? __pfx___split_vma+0x10/0x10 [ 31.120688] ? find_held_lock+0x2c/0x110 [ 31.121279] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.121913] ? lock_is_held_type+0x9f/0x120 [ 31.122526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.123228] ? mtree_range_walk+0x632/0x900 [ 31.123857] ? mas_walk+0x5c7/0x7c0 [ 31.124393] do_vmi_munmap+0x1f1/0x2b0 [ 31.124946] mmap_region+0x1f9/0x2660 [ 31.125487] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.126068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.126884] ? __pfx_lock_acquire+0x10/0x10 [ 31.127493] ? __pfx_mmap_region+0x10/0x10 [ 31.128090] ? security_mmap_addr+0x7d/0xa0 [ 31.128693] ? get_unmapped_area+0x1f5/0x3f0 [ 31.129319] do_mmap+0x854/0xf00 [ 31.129819] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.130368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.131015] ksys_mmap_pgoff+0x3af/0x500 [ 31.131570] do_syscall_64+0x3f/0x90 [ 31.132092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.132817] RIP: 0033:0x7fb44809bd82 [ 31.133329] 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 [ 31.135734] RSP: 002b:00007fffd6b24968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.136764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb44809bd82 [ 31.137720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4474d5000 [ 31.138672] RBP: 00007fb4474d5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.139649] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562888886980 [ 31.140601] R13: 00007fffd6b24980 R14: 00007fffd6b249b0 R15: 00007fffd6b24d10 [ 31.141569] [ 31.141900] [ 31.142141] Allocated by task 212: [ 31.142625] kasan_save_stack+0x22/0x50 [ 31.143207] kasan_set_track+0x25/0x30 [ 31.143769] __kasan_slab_alloc+0x59/0x70 [ 31.144365] kmem_cache_alloc+0x16b/0x370 [ 31.144945] vm_area_dup+0x20/0x160 [ 31.145456] __split_vma+0x170/0x950 [ 31.145980] split_vma+0xc6/0x110 [ 31.146472] mprotect_fixup+0x8d2/0xb30 [ 31.147056] do_mprotect_pkey+0x87e/0xd40 [ 31.147644] __x64_sys_mprotect+0x78/0xc0 [ 31.148229] do_syscall_64+0x3f/0x90 [ 31.148766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.149491] [ 31.149737] Freed by task 212: [ 31.150187] kasan_save_stack+0x22/0x50 [ 31.150767] kasan_set_track+0x25/0x30 [ 31.151323] kasan_save_free_info+0x2b/0x50 [ 31.151927] __kasan_slab_free+0x10a/0x190 [ 31.152523] kmem_cache_free+0x10d/0x4d0 [ 31.153104] rcu_core+0x8c8/0x2860 [ 31.153603] __do_softirq+0x1b7/0x7d4 [ 31.154142] [ 31.154382] Last potentially related work creation: [ 31.155055] kasan_save_stack+0x22/0x50 [ 31.155629] __kasan_record_aux_stack+0x8e/0xa0 [ 31.156280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.157004] remove_vma+0x139/0x170 [ 31.157513] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.158146] do_vmi_munmap+0x1f1/0x2b0 [ 31.158692] __vm_munmap+0x138/0x3a0 [ 31.159245] __x64_sys_munmap+0x59/0x80 [ 31.159813] do_syscall_64+0x3f/0x90 [ 31.160346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161069] [ 31.161313] Second to last potentially related work creation: [ 31.162096] kasan_save_stack+0x22/0x50 [ 31.162666] __kasan_record_aux_stack+0x8e/0xa0 [ 31.163324] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.164047] remove_vma+0x139/0x170 [ 31.164602] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.165243] do_vmi_munmap+0x1f1/0x2b0 [ 31.165793] mmap_region+0x1f9/0x2660 [ 31.166330] do_mmap+0x854/0xf00 [ 31.166823] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.167381] ksys_mmap_pgoff+0x3af/0x500 [ 31.167958] do_syscall_64+0x3f/0x90 [ 31.168491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169213] [ 31.169453] The buggy address belongs to the object at ffff88800e594570 [ 31.169453] which belongs to the cache vm_area_struct of size 168 [ 31.171150] The buggy address is located 88 bytes inside of [ 31.171150] freed 168-byte region [ffff88800e594570, ffff88800e594618) [ 31.172682] [ 31.172914] The buggy address belongs to the physical page: [ 31.173622] page:00000000007c6eea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe594 [ 31.174785] memcg:ffff88800e5cd501 [ 31.175235] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.175976] page_type: 0xffffffff() [ 31.176452] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.177426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5cd501 [ 31.178400] page dumped because: kasan: bad access detected [ 31.179110] [ 31.179341] Memory state around the buggy address: [ 31.179968] ffff88800e594480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.180884] ffff88800e594500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.181803] >ffff88800e594580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.182732] ^ [ 31.183454] ffff88800e594600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.184369] ffff88800e594680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.185291] ================================================================== [ 31.186501] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.474307] BUG: Bad rss-counter state mm:000000009f76bc54 type:MM_FILEPAGES val:33 [ 33.475517] BUG: Bad rss-counter state mm:000000009f76bc54 type:MM_ANONPAGES val:22 [ 33.874860] BUG: Bad rss-counter state mm:0000000004dc2cd4 type:MM_FILEPAGES val:33 [ 33.876042] BUG: Bad rss-counter state mm:0000000004dc2cd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15761' (ECDSA) to the list of known hosts. 2023/06/19 17:11:13 fuzzer started 2023/06/19 17:11:13 dialing manager at localhost:44161 2023/06/19 17:11:13 checking machine... 2023/06/19 17:11:13 checking revisions... [ 34.589834] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:11:13 testing simple program... [ 34.648074] cgroup: Unknown subsys name 'net' [ 34.704145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806192 RDI=ffff88806ce3de20 RBP=ffff88806ce3de20 RSP=ffff88800ee6f280 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88800e8cf390 R12=ffff88800844f780 R13=ffffea00003a33c0 R14=0000000000000000 R15=0000000000000003 RIP=ffffffff812d860e RFL=00000046 [---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 00007f0ba181f900 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=00007f0ba1dd6618 CR3=000000001470e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fe2e950ee30 CR3=000000000c9da000 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=ed1738d8f899fda1834251e837f94d4d XMM02=ec2efd57dc4c00df000000000011e308 XMM03=3e2d22ecb63073ad000000000011e3d8 XMM04=25ef9b326b6e694b00000000000ae988 XMM05=19e9129bd510f2350000000000135658 XMM06=8cb73e6a59fd1fb20000000000134830 XMM07=e042d86d42eb936e0000000000124d08 XMM08=3e2d22ecb63073ad000000000011e3d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000