[ 33.853545] BUG: Bad rss-counter state mm:00000000689caa8e type:MM_FILEPAGES val:33 [ 33.854610] BUG: Bad rss-counter state mm:00000000689caa8e type:MM_ANONPAGES val:22 [ 33.903514] ================================================================== [ 33.904724] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.905665] Read of size 8 at addr ffff88800ec74ed8 by task sshd/221 [ 33.906445] [ 33.906668] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.907531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.908528] Call Trace: [ 33.908846] [ 33.909142] dump_stack_lvl+0x91/0xf0 [ 33.909636] print_report+0xcc/0x620 [ 33.910131] ? __virt_addr_valid+0x102/0x340 [ 33.910682] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.911307] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.911940] kasan_report+0xbe/0xf0 [ 33.912431] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.913050] vma_interval_tree_remove+0xc75/0xec0 [ 33.913664] vma_prepare+0xc54/0x11a0 [ 33.914161] __split_vma+0x5af/0x950 [ 33.914631] ? __pfx___split_vma+0x10/0x10 [ 33.915171] ? find_held_lock+0x2c/0x110 [ 33.915717] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.916290] ? lock_is_held_type+0x9f/0x120 [ 33.916828] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.917443] ? mtree_range_walk+0x632/0x900 [ 33.918000] ? mas_walk+0x5c7/0x7c0 [ 33.918483] do_vmi_munmap+0x1f1/0x2b0 [ 33.918972] mmap_region+0x1f9/0x2660 [ 33.919475] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.920005] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.920739] ? __pfx_lock_acquire+0x10/0x10 [ 33.921286] ? __pfx_mmap_region+0x10/0x10 [ 33.921818] ? security_mmap_addr+0x7d/0xa0 [ 33.922360] ? get_unmapped_area+0x1f5/0x3f0 [ 33.922910] do_mmap+0x854/0xf00 [ 33.923362] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.923877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.924453] ksys_mmap_pgoff+0x3af/0x500 [ 33.924962] do_syscall_64+0x3f/0x90 [ 33.925450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.926100] RIP: 0033:0x7f65b18dbd82 [ 33.926565] 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 [ 33.928715] RSP: 002b:00007ffef6c57918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.929730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65b18dbd82 [ 33.930588] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65b0d15000 [ 33.931438] RBP: 00007f65b0d15000 R08: 0000000000000009 R09: 0000000000001000 [ 33.932294] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647ea4aaec0 [ 33.933138] R13: 00007ffef6c57930 R14: 00007ffef6c57960 R15: 00007ffef6c57cc0 [ 33.933997] [ 33.934319] [ 33.934536] Allocated by task 213: [ 33.934962] kasan_save_stack+0x22/0x50 [ 33.935481] kasan_set_track+0x25/0x30 [ 33.935990] __kasan_slab_alloc+0x59/0x70 [ 33.936524] kmem_cache_alloc+0x16b/0x370 [ 33.937040] vm_area_dup+0x20/0x160 [ 33.937506] __split_vma+0x170/0x950 [ 33.937969] split_vma+0xc6/0x110 [ 33.938418] mprotect_fixup+0x8d2/0xb30 [ 33.938916] do_mprotect_pkey+0x87e/0xd40 [ 33.939446] __x64_sys_mprotect+0x78/0xc0 [ 33.939982] do_syscall_64+0x3f/0x90 [ 33.940464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.941127] [ 33.941343] Freed by task 213: [ 33.941742] kasan_save_stack+0x22/0x50 [ 33.942258] kasan_set_track+0x25/0x30 [ 33.942749] kasan_save_free_info+0x2b/0x50 [ 33.943293] __kasan_slab_free+0x10a/0x190 [ 33.943854] kmem_cache_free+0x10d/0x4d0 [ 33.944381] rcu_core+0x8c8/0x2860 [ 33.944823] __do_softirq+0x1b7/0x7d4 [ 33.945307] [ 33.945521] Last potentially related work creation: [ 33.946104] kasan_save_stack+0x22/0x50 [ 33.946632] __kasan_record_aux_stack+0x8e/0xa0 [ 33.947222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.947877] remove_vma+0x139/0x170 [ 33.948334] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.948896] do_vmi_munmap+0x1f1/0x2b0 [ 33.949401] __vm_munmap+0x138/0x3a0 [ 33.949867] __x64_sys_munmap+0x59/0x80 [ 33.950379] do_syscall_64+0x3f/0x90 [ 33.950862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.951521] [ 33.951760] Second to last potentially related work creation: [ 33.952460] kasan_save_stack+0x22/0x50 [ 33.952962] __kasan_record_aux_stack+0x8e/0xa0 [ 33.953550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.954217] remove_vma+0x139/0x170 [ 33.954672] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.955239] do_vmi_munmap+0x1f1/0x2b0 [ 33.955734] mmap_region+0x1f9/0x2660 [ 33.956232] do_mmap+0x854/0xf00 [ 33.956666] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.957172] ksys_mmap_pgoff+0x3af/0x500 [ 33.957676] do_syscall_64+0x3f/0x90 [ 33.958167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.958807] [ 33.959025] The buggy address belongs to the object at ffff88800ec74e80 [ 33.959025] which belongs to the cache vm_area_struct of size 168 [ 33.960601] The buggy address is located 88 bytes inside of [ 33.960601] freed 168-byte region [ffff88800ec74e80, ffff88800ec74f28) [ 33.962237] [ 33.962455] The buggy address belongs to the physical page: [ 33.963159] page:00000000dfbb3acf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec74 [ 33.964262] memcg:ffff88800d2baf01 [ 33.964685] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.965400] page_type: 0xffffffff() [ 33.965849] raw: 0100000000000200 ffff88800879fc80 ffffea00003ae980 dead000000000005 [ 33.966774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2baf01 [ 33.967703] page dumped because: kasan: bad access detected [ 33.968378] [ 33.968596] Memory state around the buggy address: [ 33.969189] ffff88800ec74d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.970034] ffff88800ec74e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.970895] >ffff88800ec74e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.971778] ^ [ 33.972520] ffff88800ec74f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.973382] ffff88800ec74f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.974255] ================================================================== [ 33.975383] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.941390] BUG: Bad rss-counter state mm:000000006840a64a type:MM_FILEPAGES val:33 [ 35.942188] BUG: Bad rss-counter state mm:000000006840a64a type:MM_ANONPAGES val:22 [ 36.422336] BUG: Bad rss-counter state mm:0000000074c8d82e type:MM_FILEPAGES val:33 [ 36.423472] BUG: Bad rss-counter state mm:0000000074c8d82e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19528' (ECDSA) to the list of known hosts. 2023/06/20 00:21:31 fuzzer started 2023/06/20 00:21:31 dialing manager at localhost:44161 2023/06/20 00:21:31 checking machine... 2023/06/20 00:21:31 checking revisions... [ 37.070537] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:21:31 testing simple program... [ 37.124700] cgroup: Unknown subsys name 'net' [ 37.180275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:28 Registers: info registers vcpu 0 RAX=1ffff110025f3e85 RBX=ffff888012f9f3f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888012f9f428 RBP=ffff888010086280 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888010071180 R14=ffffffff8186b9c5 R15=ffff88800e859300 RIP=ffffffff81846362 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 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=0000558b9b635000 CR3=000000000e3f8000 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=2030333a31323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a31323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e4cf8b9 RBX=dffffc0000000000 RCX=ffffffff812e00e5 RDX=1ffff11001c99f19 RSI=ffffffff87b86f80 RDI=ffff88800e4fa078 RBP=ffff88800e4cf8b8 RSP=ffff88800fd37b28 R8 =0000000000000001 R9 =ffffed1001fa6f5d R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e4fa068 R13=fffffbfff0f70df0 R14=0000000000000000 R15=ffffffff87b86f80 RIP=ffffffff844cc482 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 00007feec6b0a900 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=00007feec70c20b0 CR3=0000000019de4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000