[ 31.431960] BUG: Bad rss-counter state mm:00000000bdc76817 type:MM_FILEPAGES val:33 [ 31.433180] BUG: Bad rss-counter state mm:00000000bdc76817 type:MM_ANONPAGES val:22 [ 31.472131] ================================================================== [ 31.473263] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.474383] Read of size 8 at addr ffff88800e771798 by task sshd/223 [ 31.475233] [ 31.475498] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.476698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.478053] Call Trace: [ 31.478432] [ 31.478869] dump_stack_lvl+0x91/0xf0 [ 31.479454] print_report+0xcc/0x620 [ 31.480081] ? __virt_addr_valid+0x102/0x340 [ 31.480792] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.481523] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.482297] kasan_report+0xbe/0xf0 [ 31.482906] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.483705] vma_interval_tree_remove+0xc75/0xec0 [ 31.484483] vma_prepare+0xc54/0x11a0 [ 31.485087] __split_vma+0x5af/0x950 [ 31.485656] ? __pfx___split_vma+0x10/0x10 [ 31.486298] ? find_held_lock+0x2c/0x110 [ 31.486946] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.487610] ? lock_is_held_type+0x9f/0x120 [ 31.488183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.488785] ? mtree_range_walk+0x632/0x900 [ 31.489350] ? mas_walk+0x5c7/0x7c0 [ 31.489825] do_vmi_munmap+0x1f1/0x2b0 [ 31.490323] mmap_region+0x1f9/0x2660 [ 31.490816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.491338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.492051] ? __pfx_lock_acquire+0x10/0x10 [ 31.492594] ? __pfx_mmap_region+0x10/0x10 [ 31.493138] ? security_mmap_addr+0x7d/0xa0 [ 31.493677] ? get_unmapped_area+0x1f5/0x3f0 [ 31.494220] do_mmap+0x854/0xf00 [ 31.494664] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.495165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.495725] ksys_mmap_pgoff+0x3af/0x500 [ 31.496232] do_syscall_64+0x3f/0x90 [ 31.496708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.497358] RIP: 0033:0x7f309aa4ad82 [ 31.497813] 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 [ 31.499944] RSP: 002b:00007fff864bcab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.500850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f309aa4ad82 [ 31.501690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3099e84000 [ 31.502528] RBP: 00007f3099e84000 R08: 0000000000000009 R09: 0000000000001000 [ 31.503376] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d6fdf6d90 [ 31.504226] R13: 00007fff864bcad0 R14: 00007fff864bcb00 R15: 00007fff864bce60 [ 31.505079] [ 31.505370] [ 31.505587] Allocated by task 210: [ 31.506015] kasan_save_stack+0x22/0x50 [ 31.506521] kasan_set_track+0x25/0x30 [ 31.507035] __kasan_slab_alloc+0x59/0x70 [ 31.507562] kmem_cache_alloc+0x16b/0x370 [ 31.508073] vm_area_dup+0x20/0x160 [ 31.508533] __split_vma+0x170/0x950 [ 31.508995] split_vma+0xc6/0x110 [ 31.509434] mprotect_fixup+0x8d2/0xb30 [ 31.509940] do_mprotect_pkey+0x87e/0xd40 [ 31.510465] __x64_sys_mprotect+0x78/0xc0 [ 31.510997] do_syscall_64+0x3f/0x90 [ 31.511473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.512114] [ 31.512333] Freed by task 210: [ 31.512728] kasan_save_stack+0x22/0x50 [ 31.513231] kasan_set_track+0x25/0x30 [ 31.513811] kasan_save_free_info+0x2b/0x50 [ 31.514345] __kasan_slab_free+0x10a/0x190 [ 31.514900] kmem_cache_free+0x10d/0x4d0 [ 31.515407] rcu_core+0x8c8/0x2860 [ 31.515852] __do_softirq+0x1b7/0x7d4 [ 31.516339] [ 31.516556] Last potentially related work creation: [ 31.517149] kasan_save_stack+0x22/0x50 [ 31.517660] __kasan_record_aux_stack+0x8e/0xa0 [ 31.518234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.518888] remove_vma+0x139/0x170 [ 31.519339] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.519900] do_vmi_munmap+0x1f1/0x2b0 [ 31.520388] __vm_munmap+0x138/0x3a0 [ 31.520861] __x64_sys_munmap+0x59/0x80 [ 31.521354] do_syscall_64+0x3f/0x90 [ 31.521834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.522478] [ 31.522694] Second to last potentially related work creation: [ 31.523381] kasan_save_stack+0x22/0x50 [ 31.523888] __kasan_record_aux_stack+0x8e/0xa0 [ 31.524457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.525099] remove_vma+0x139/0x170 [ 31.525547] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.526099] do_vmi_munmap+0x1f1/0x2b0 [ 31.526588] mmap_region+0x1f9/0x2660 [ 31.527087] do_mmap+0x854/0xf00 [ 31.527518] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.528011] ksys_mmap_pgoff+0x3af/0x500 [ 31.528509] do_syscall_64+0x3f/0x90 [ 31.528990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.529630] [ 31.529850] The buggy address belongs to the object at ffff88800e771740 [ 31.529850] which belongs to the cache vm_area_struct of size 168 [ 31.531314] The buggy address is located 88 bytes inside of [ 31.531314] freed 168-byte region [ffff88800e771740, ffff88800e7717e8) [ 31.532713] [ 31.532931] The buggy address belongs to the physical page: [ 31.533580] page:0000000056b1b5bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe771 [ 31.534662] memcg:ffff88800e9d3f01 [ 31.535110] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.535776] page_type: 0xffffffff() [ 31.536235] raw: 0100000000000200 ffff8880087a0c80 ffffea0000319180 dead000000000002 [ 31.537151] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9d3f01 [ 31.538051] page dumped because: kasan: bad access detected [ 31.538712] [ 31.538946] Memory state around the buggy address: [ 31.539525] ffff88800e771680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.540383] ffff88800e771700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.541227] >ffff88800e771780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.542075] ^ [ 31.542564] ffff88800e771800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.543425] ffff88800e771880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.544272] ================================================================== [ 31.545281] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.685632] BUG: Bad rss-counter state mm:00000000828e283c type:MM_FILEPAGES val:33 [ 33.687114] BUG: Bad rss-counter state mm:00000000828e283c type:MM_ANONPAGES val:22 [ 34.132303] BUG: Bad rss-counter state mm:00000000df6bf956 type:MM_FILEPAGES val:33 [ 34.133277] BUG: Bad rss-counter state mm:00000000df6bf956 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63414' (ECDSA) to the list of known hosts. 2023/06/20 18:55:41 fuzzer started 2023/06/20 18:55:42 dialing manager at localhost:36067 2023/06/20 18:55:42 checking machine... 2023/06/20 18:55:42 checking revisions... [ 34.831099] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:55:42 testing simple program... [ 34.878002] cgroup: Unknown subsys name 'net' [ 34.947242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff888018adfa50 RDX=1ffff1100315bf42 RSI=1ffff1100315bf38 RDI=ffff888018adf9b0 RBP=ffff888018adfa08 RSP=ffff888018adf8f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888018adf9b0 R11=0000000000000001 R12=ffff888018adfa10 R13=ffff888018adf9f8 R14=ffff888018adf9f8 R15=ffff888018adf9b0 RIP=ffffffff81130682 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 00007fc47e0bc900 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=00007ffc5d59a000 CR3=000000000e2f4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9d89564f60 CR3=000000000fd4c000 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=2031343a35353a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a35353a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000