[ 26.091707] BUG: Bad rss-counter state mm:00000000e61f1973 type:MM_FILEPAGES val:33 [ 26.093111] BUG: Bad rss-counter state mm:00000000e61f1973 type:MM_ANONPAGES val:22 [ 26.251989] ================================================================== [ 26.252896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.253839] Read of size 8 at addr ffff88800ecd05c8 by task sshd/220 [ 26.254623] [ 26.254857] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.255817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.256806] Call Trace: [ 26.257129] [ 26.257419] dump_stack_lvl+0x91/0xf0 [ 26.257930] print_report+0xcc/0x620 [ 26.258418] ? __virt_addr_valid+0x102/0x340 [ 26.259007] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.259644] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.260274] kasan_report+0xbe/0xf0 [ 26.260756] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.261389] vma_interval_tree_remove+0xc75/0xec0 [ 26.261996] vma_prepare+0xc54/0x11a0 [ 26.262483] __split_vma+0x5af/0x950 [ 26.262988] ? __pfx___split_vma+0x10/0x10 [ 26.263534] ? find_held_lock+0x2c/0x110 [ 26.264072] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.264650] ? lock_is_held_type+0x9f/0x120 [ 26.265206] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.265825] ? mtree_range_walk+0x632/0x900 [ 26.266392] ? mas_walk+0x5c7/0x7c0 [ 26.266881] do_vmi_munmap+0x1f1/0x2b0 [ 26.267384] mmap_region+0x1f9/0x2660 [ 26.267878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.268406] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.269146] ? __pfx_lock_acquire+0x10/0x10 [ 26.269690] ? __pfx_mmap_region+0x10/0x10 [ 26.270240] ? security_mmap_addr+0x7d/0xa0 [ 26.270804] ? get_unmapped_area+0x1f5/0x3f0 [ 26.271374] do_mmap+0x854/0xf00 [ 26.271830] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.272348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.272939] ksys_mmap_pgoff+0x3af/0x500 [ 26.273448] do_syscall_64+0x3f/0x90 [ 26.273940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.274615] RIP: 0033:0x7f67fbdbfd82 [ 26.275097] 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 [ 26.277315] RSP: 002b:00007fff38bfc518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.278263] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67fbdbfd82 [ 26.279144] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67fb1f9000 [ 26.280035] RBP: 00007f67fb1f9000 R08: 0000000000000009 R09: 0000000000001000 [ 26.280923] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d174b29b20 [ 26.281768] R13: 00007fff38bfc530 R14: 00007fff38bfc560 R15: 00007fff38bfc8c0 [ 26.282697] [ 26.283002] [ 26.283230] Allocated by task 213: [ 26.283683] kasan_save_stack+0x22/0x50 [ 26.284226] kasan_set_track+0x25/0x30 [ 26.284756] __kasan_slab_alloc+0x59/0x70 [ 26.285288] kmem_cache_alloc+0x16b/0x370 [ 26.285803] vm_area_dup+0x20/0x160 [ 26.286291] __split_vma+0x170/0x950 [ 26.286804] split_vma+0xc6/0x110 [ 26.287260] mprotect_fixup+0x8d2/0xb30 [ 26.287781] do_mprotect_pkey+0x87e/0xd40 [ 26.288320] __x64_sys_mprotect+0x78/0xc0 [ 26.288864] do_syscall_64+0x3f/0x90 [ 26.289359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.290029] [ 26.290243] Freed by task 213: [ 26.290635] kasan_save_stack+0x22/0x50 [ 26.291179] kasan_set_track+0x25/0x30 [ 26.291706] kasan_save_free_info+0x2b/0x50 [ 26.292279] __kasan_slab_free+0x10a/0x190 [ 26.292847] kmem_cache_free+0x10d/0x4d0 [ 26.293391] rcu_core+0x8c8/0x2860 [ 26.293869] __do_softirq+0x1b7/0x7d4 [ 26.294380] [ 26.294613] Last potentially related work creation: [ 26.295243] kasan_save_stack+0x22/0x50 [ 26.295792] __kasan_record_aux_stack+0x8e/0xa0 [ 26.296384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.297035] remove_vma+0x139/0x170 [ 26.297523] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.298117] do_vmi_munmap+0x1f1/0x2b0 [ 26.298645] __vm_munmap+0x138/0x3a0 [ 26.299170] __x64_sys_munmap+0x59/0x80 [ 26.299709] do_syscall_64+0x3f/0x90 [ 26.300222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.300925] [ 26.301158] Second to last potentially related work creation: [ 26.301902] kasan_save_stack+0x22/0x50 [ 26.302454] __kasan_record_aux_stack+0x8e/0xa0 [ 26.303093] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.303782] remove_vma+0x139/0x170 [ 26.304276] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.304884] do_vmi_munmap+0x1f1/0x2b0 [ 26.305413] mmap_region+0x1f9/0x2660 [ 26.305940] do_mmap+0x854/0xf00 [ 26.306407] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.306959] ksys_mmap_pgoff+0x3af/0x500 [ 26.307519] do_syscall_64+0x3f/0x90 [ 26.308037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.308743] [ 26.308970] The buggy address belongs to the object at ffff88800ecd0570 [ 26.308970] which belongs to the cache vm_area_struct of size 168 [ 26.310516] The buggy address is located 88 bytes inside of [ 26.310516] freed 168-byte region [ffff88800ecd0570, ffff88800ecd0618) [ 26.312073] [ 26.312308] The buggy address belongs to the physical page: [ 26.313035] page:000000000d70a8d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecd0 [ 26.314210] memcg:ffff88800effaa01 [ 26.314640] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.315367] page_type: 0xffffffff() [ 26.315874] raw: 0100000000000200 ffff88800879fc80 ffffea000038d580 dead000000000006 [ 26.316917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800effaa01 [ 26.317938] page dumped because: kasan: bad access detected [ 26.318691] [ 26.318937] Memory state around the buggy address: [ 26.319586] ffff88800ecd0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.320553] ffff88800ecd0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 26.321517] >ffff88800ecd0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.322414] ^ [ 26.323126] ffff88800ecd0600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 26.324093] ffff88800ecd0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.325059] ================================================================== [ 26.326146] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.960056] BUG: Bad rss-counter state mm:00000000e34eb800 type:MM_FILEPAGES val:33 [ 27.960824] BUG: Bad rss-counter state mm:00000000e34eb800 type:MM_ANONPAGES val:22 [ 28.349969] BUG: Bad rss-counter state mm:00000000af978d9b type:MM_FILEPAGES val:33 [ 28.351549] BUG: Bad rss-counter state mm:00000000af978d9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45895' (ECDSA) to the list of known hosts. 2023/06/19 16:55:50 fuzzer started 2023/06/19 16:55:50 dialing manager at localhost:44161 2023/06/19 16:55:50 checking machine... 2023/06/19 16:55:50 checking revisions... [ 29.095218] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:55:50 testing simple program... [ 29.142010] cgroup: Unknown subsys name 'net' [ 29.205780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc3c3baf490 CR3=000000001466e000 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=2030353a35353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a35353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffffea0000206080 RCX=0000000080000001 RDX=ffff88800c4bb680 RSI=ffffffff8170c3a6 RDI=0000000000000001 RBP=0000000000000006 RSP=ffff88800dfef940 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000005 R13=00007f6e57b9a000 R14=ffff88800df39cc8 R15=dffffc0000000000 RIP=ffffffff814c07f1 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 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=00007f6e57b19514 CR3=000000000f252000 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=00000000000100000000000100000000 XMM02=00007f6e57eb200000007f6e57eb38c0 XMM03=00007f6e586f151000007f6e57aab000 XMM04=00007f6e586f151000007f6e57aab000 XMM05=00007f6e57eb200000007f6e57eb38c0 XMM06=00007f6e57eb32f000007f6e58018950 XMM07=00007f6e57eb2cf000007f6e57eb2760 XMM08=00007f6e57eb200000007f6e58018950 XMM09=00000000000000000000ff0000000000 XMM10=00000000000000000000200000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000