[ 34.923025] BUG: Bad rss-counter state mm:00000000f8221bbe type:MM_FILEPAGES val:33 [ 34.924371] BUG: Bad rss-counter state mm:00000000f8221bbe type:MM_ANONPAGES val:22 [ 35.025127] ================================================================== [ 35.025691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.026839] Read of size 8 at addr ffff88800e1f94e0 by task sshd/219 [ 35.027790] [ 35.028062] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.029139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.030513] Call Trace: [ 35.031076] [ 35.031437] dump_stack_lvl+0x91/0xf0 [ 35.032059] print_report+0xcc/0x620 [ 35.032854] ? __virt_addr_valid+0x102/0x340 [ 35.033734] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.034189] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.034649] kasan_report+0xbe/0xf0 [ 35.035001] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.035409] vma_interval_tree_remove+0xc75/0xec0 [ 35.035776] vma_prepare+0xc54/0x11a0 [ 35.036070] __split_vma+0x5af/0x950 [ 35.036358] ? __pfx___split_vma+0x10/0x10 [ 35.036676] ? find_held_lock+0x2c/0x110 [ 35.036996] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.037342] ? lock_is_held_type+0x9f/0x120 [ 35.037663] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.038038] ? mtree_range_walk+0x632/0x900 [ 35.038368] ? mas_walk+0x5c7/0x7c0 [ 35.038651] do_vmi_munmap+0x1f1/0x2b0 [ 35.038955] mmap_region+0x1f9/0x2660 [ 35.039240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.039549] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.039992] ? __pfx_lock_acquire+0x10/0x10 [ 35.040307] ? __pfx_mmap_region+0x10/0x10 [ 35.040631] ? security_mmap_addr+0x7d/0xa0 [ 35.040993] ? get_unmapped_area+0x1f5/0x3f0 [ 35.041347] do_mmap+0x854/0xf00 [ 35.041616] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.041921] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.042260] ksys_mmap_pgoff+0x3af/0x500 [ 35.042564] do_syscall_64+0x3f/0x90 [ 35.042855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.043241] RIP: 0033:0x7fc6ae4bed82 [ 35.043509] 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 [ 35.044813] RSP: 002b:00007ffc0c9a6ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.045392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6ae4bed82 [ 35.045915] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6ad8f8000 [ 35.046428] RBP: 00007fc6ad8f8000 R08: 0000000000000009 R09: 0000000000001000 [ 35.046927] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e3690af70 [ 35.047439] R13: 00007ffc0c9a6ec0 R14: 00007ffc0c9a6ef0 R15: 00007ffc0c9a7250 [ 35.047959] [ 35.048135] [ 35.048265] Allocated by task 211: [ 35.048525] kasan_save_stack+0x22/0x50 [ 35.048834] kasan_set_track+0x25/0x30 [ 35.049142] __kasan_slab_alloc+0x59/0x70 [ 35.049456] kmem_cache_alloc+0x16b/0x370 [ 35.049766] vm_area_dup+0x20/0x160 [ 35.050044] __split_vma+0x170/0x950 [ 35.050328] split_vma+0xc6/0x110 [ 35.050591] mprotect_fixup+0x8d2/0xb30 [ 35.050895] do_mprotect_pkey+0x87e/0xd40 [ 35.051197] __x64_sys_mprotect+0x78/0xc0 [ 35.051509] do_syscall_64+0x3f/0x90 [ 35.051794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.052188] [ 35.052314] Freed by task 203: [ 35.052551] kasan_save_stack+0x22/0x50 [ 35.052868] kasan_set_track+0x25/0x30 [ 35.053163] kasan_save_free_info+0x2b/0x50 [ 35.053492] __kasan_slab_free+0x10a/0x190 [ 35.053803] kmem_cache_free+0x10d/0x4d0 [ 35.054122] rcu_core+0x8c8/0x2860 [ 35.054392] __do_softirq+0x1b7/0x7d4 [ 35.054683] [ 35.054811] Last potentially related work creation: [ 35.055162] kasan_save_stack+0x22/0x50 [ 35.055462] __kasan_record_aux_stack+0x8e/0xa0 [ 35.055806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.056188] remove_vma+0x139/0x170 [ 35.056453] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.056805] do_vmi_munmap+0x1f1/0x2b0 [ 35.057089] __vm_munmap+0x138/0x3a0 [ 35.057363] __x64_sys_munmap+0x59/0x80 [ 35.057671] do_syscall_64+0x3f/0x90 [ 35.057950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.058340] [ 35.058466] Second to last potentially related work creation: [ 35.058880] kasan_save_stack+0x22/0x50 [ 35.059182] __kasan_record_aux_stack+0x8e/0xa0 [ 35.059533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.059909] remove_vma+0x139/0x170 [ 35.060175] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.060519] do_vmi_munmap+0x1f1/0x2b0 [ 35.060813] mmap_region+0x1f9/0x2660 [ 35.061098] do_mmap+0x854/0xf00 [ 35.061362] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.061655] ksys_mmap_pgoff+0x7d/0x500 [ 35.061953] do_syscall_64+0x3f/0x90 [ 35.062234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.062618] [ 35.062750] The buggy address belongs to the object at ffff88800e1f9488 [ 35.062750] which belongs to the cache vm_area_struct of size 168 [ 35.063634] The buggy address is located 88 bytes inside of [ 35.063634] freed 168-byte region [ffff88800e1f9488, ffff88800e1f9530) [ 35.064487] [ 35.064614] The buggy address belongs to the physical page: [ 35.065017] page:000000008fc5f9eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f9 [ 35.065665] memcg:ffff88800d228b01 [ 35.065909] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.066289] page_type: 0xffffffff() [ 35.066556] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.067115] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d228b01 [ 35.067656] page dumped because: kasan: bad access detected [ 35.068052] [ 35.068177] Memory state around the buggy address: [ 35.068527] ffff88800e1f9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.069053] ffff88800e1f9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.069562] >ffff88800e1f9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.070062] ^ [ 35.070516] ffff88800e1f9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 35.071020] ffff88800e1f9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.071533] ================================================================== [ 35.072164] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.960376] BUG: Bad rss-counter state mm:000000009bcfacdf type:MM_FILEPAGES val:33 [ 36.962375] BUG: Bad rss-counter state mm:000000009bcfacdf type:MM_ANONPAGES val:22 [ 37.448356] BUG: Bad rss-counter state mm:000000002853e69b type:MM_FILEPAGES val:33 [ 37.449668] BUG: Bad rss-counter state mm:000000002853e69b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37107' (ECDSA) to the list of known hosts. 2023/06/20 03:56:23 fuzzer started 2023/06/20 03:56:23 dialing manager at localhost:44161 2023/06/20 03:56:23 checking machine... 2023/06/20 03:56:23 checking revisions... [ 38.147603] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:56:23 testing simple program... [ 38.188602] cgroup: Unknown subsys name 'net' [ 38.237375] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:19 Registers: info registers vcpu 0 RAX=1ffff11001b28485 RBX=ffff88800d9423f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d942428 RBP=ffff888018edf1d0 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888018ee1500 R14=ffffffff818d9dc6 R15=ffff88800d06c400 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 00007f220a75d900 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=00007fdb2caef650 CR3=000000000ca62000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=150172912699155f00000000000ae988 XMM05=50c74373408b56600000000000136a78 XMM06=806171799158d96700000000001354f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110038caf15 RDX=dffffc0000000000 RSI=ffff88801c657820 RDI=ffff88801c657850 RBP=ffff88801c6578a8 RSP=ffff88801c657790 R8 =0000000000000001 R9 =ffff88801c657890 R10=0000000000038001 R11=0000000000006097 R12=ffff88801c6578b0 R13=ffff88801c657898 R14=ffff88801c657891 R15=ffff88801c657850 RIP=ffffffff81130706 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 00007fdb2c53a900 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=00007fdb2caf1618 CR3=000000000c4c2000 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