[ 30.499952] BUG: Bad rss-counter state mm:00000000fcd720aa type:MM_FILEPAGES val:33 [ 30.501121] BUG: Bad rss-counter state mm:00000000fcd720aa type:MM_ANONPAGES val:22 [ 30.665868] ================================================================== [ 30.666932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.668051] Read of size 8 at addr ffff88800fc4ddf0 by task sshd/225 [ 30.668954] [ 30.669217] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.670221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.671367] Call Trace: [ 30.671771] [ 30.672107] dump_stack_lvl+0x91/0xf0 [ 30.672668] print_report+0xcc/0x620 [ 30.673151] ? __virt_addr_valid+0x102/0x340 [ 30.673693] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674922] kasan_report+0xbe/0xf0 [ 30.675401] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.676033] vma_interval_tree_remove+0xc75/0xec0 [ 30.676631] vma_prepare+0xc54/0x11a0 [ 30.677107] __split_vma+0x5af/0x950 [ 30.677577] ? __pfx___split_vma+0x10/0x10 [ 30.678098] ? find_held_lock+0x2c/0x110 [ 30.678616] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.679177] ? lock_is_held_type+0x9f/0x120 [ 30.679734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.680340] ? mtree_range_walk+0x632/0x900 [ 30.680894] ? mas_walk+0x5c7/0x7c0 [ 30.681369] do_vmi_munmap+0x1f1/0x2b0 [ 30.681862] mmap_region+0x1f9/0x2660 [ 30.682347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.682859] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.683566] ? __pfx_lock_acquire+0x10/0x10 [ 30.684105] ? __pfx_mmap_region+0x10/0x10 [ 30.684631] ? security_mmap_addr+0x7d/0xa0 [ 30.685161] ? get_unmapped_area+0x1f5/0x3f0 [ 30.685706] do_mmap+0x854/0xf00 [ 30.686141] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.686639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.687199] ksys_mmap_pgoff+0x3af/0x500 [ 30.687709] do_syscall_64+0x3f/0x90 [ 30.688189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688832] RIP: 0033:0x7f683b1d0d82 [ 30.689291] 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 [ 30.691394] RSP: 002b:00007ffd91b8baf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.692319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f683b1d0d82 [ 30.693173] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f683a60a000 [ 30.694019] RBP: 00007f683a60a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.694856] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557fb33e9ec0 [ 30.695714] R13: 00007ffd91b8bb10 R14: 00007ffd91b8bb40 R15: 00007ffd91b8bea0 [ 30.696570] [ 30.696860] [ 30.697074] Allocated by task 211: [ 30.697503] kasan_save_stack+0x22/0x50 [ 30.698005] kasan_set_track+0x25/0x30 [ 30.698504] __kasan_slab_alloc+0x59/0x70 [ 30.699027] kmem_cache_alloc+0x16b/0x370 [ 30.699544] vm_area_dup+0x20/0x160 [ 30.700076] __split_vma+0x170/0x950 [ 30.700543] split_vma+0xc6/0x110 [ 30.700976] mprotect_fixup+0x8d2/0xb30 [ 30.701474] do_mprotect_pkey+0x87e/0xd40 [ 30.701997] __x64_sys_mprotect+0x78/0xc0 [ 30.702514] do_syscall_64+0x3f/0x90 [ 30.702980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703631] [ 30.703843] Freed by task 211: [ 30.704238] kasan_save_stack+0x22/0x50 [ 30.704737] kasan_set_track+0x25/0x30 [ 30.705226] kasan_save_free_info+0x2b/0x50 [ 30.705752] __kasan_slab_free+0x10a/0x190 [ 30.706285] kmem_cache_free+0x10d/0x4d0 [ 30.706793] rcu_core+0x8c8/0x2860 [ 30.707241] __do_softirq+0x1b7/0x7d4 [ 30.707768] [ 30.707988] Last potentially related work creation: [ 30.708576] kasan_save_stack+0x22/0x50 [ 30.709088] __kasan_record_aux_stack+0x8e/0xa0 [ 30.709663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.710307] remove_vma+0x139/0x170 [ 30.710755] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.711315] do_vmi_munmap+0x1f1/0x2b0 [ 30.711816] __vm_munmap+0x138/0x3a0 [ 30.712284] __x64_sys_munmap+0x59/0x80 [ 30.712781] do_syscall_64+0x3f/0x90 [ 30.713255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.713890] [ 30.714105] The buggy address belongs to the object at ffff88800fc4dd98 [ 30.714105] which belongs to the cache vm_area_struct of size 168 [ 30.715574] The buggy address is located 88 bytes inside of [ 30.715574] freed 168-byte region [ffff88800fc4dd98, ffff88800fc4de40) [ 30.716982] [ 30.717197] The buggy address belongs to the physical page: [ 30.717861] page:000000009302862f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc4d [ 30.718954] memcg:ffff88800dc69701 [ 30.719384] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.720042] page_type: 0xffffffff() [ 30.720491] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.721409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc69701 [ 30.722319] page dumped because: kasan: bad access detected [ 30.722973] [ 30.723180] Memory state around the buggy address: [ 30.723785] ffff88800fc4dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.724665] ffff88800fc4dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.725546] >ffff88800fc4dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.726419] ^ [ 30.727256] ffff88800fc4de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.728141] ffff88800fc4de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.729012] ================================================================== [ 30.729959] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.738863] BUG: Bad rss-counter state mm:0000000097ded774 type:MM_FILEPAGES val:33 [ 32.739913] BUG: Bad rss-counter state mm:0000000097ded774 type:MM_ANONPAGES val:22 [ 33.205135] BUG: Bad rss-counter state mm:00000000add8cb1b type:MM_FILEPAGES val:33 [ 33.206128] BUG: Bad rss-counter state mm:00000000add8cb1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17525' (ECDSA) to the list of known hosts. 2023/06/20 12:02:08 fuzzer started 2023/06/20 12:02:08 dialing manager at localhost:36067 2023/06/20 12:02:09 checking machine... 2023/06/20 12:02:09 checking revisions... [ 33.904273] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:02:09 testing simple program... [ 33.953476] cgroup: Unknown subsys name 'net' [ 34.005881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:02:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f1c20f6c990 CR3=0000000017ed0000 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=2038303a32303a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3433 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3433325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a32303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880100e3680 RSI=ffffffff81993078 RDI=ffffffff87f37488 RBP=ffff888016212d68 RSP=ffff88801bf9fb80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888016212ab8 R13=ffff888016212aa8 R14=ffff888016212988 R15=ffff8880162129d8 RIP=ffffffff814c089b 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 00007fd9ab63d900 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=00007ffd3be58000 CR3=000000000dd68000 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=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