[ 36.047708] BUG: Bad rss-counter state mm:00000000919b0b26 type:MM_FILEPAGES val:33 [ 36.048737] BUG: Bad rss-counter state mm:00000000919b0b26 type:MM_ANONPAGES val:22 [ 36.228096] ================================================================== [ 36.229129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.230261] Read of size 8 at addr ffff88800e14db38 by task sshd/218 [ 36.231080] [ 36.231338] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.232322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.233387] Call Trace: [ 36.233725] [ 36.234024] dump_stack_lvl+0x91/0xf0 [ 36.234567] print_report+0xcc/0x620 [ 36.235114] ? __virt_addr_valid+0x102/0x340 [ 36.235699] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.236371] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.237126] kasan_report+0xbe/0xf0 [ 36.237827] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.238713] vma_interval_tree_remove+0xc75/0xec0 [ 36.239498] vma_prepare+0xc54/0x11a0 [ 36.240004] __split_vma+0x5af/0x950 [ 36.240549] ? __pfx___split_vma+0x10/0x10 [ 36.241139] ? find_held_lock+0x2c/0x110 [ 36.241812] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.242420] ? lock_is_held_type+0x9f/0x120 [ 36.242978] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.243660] ? mtree_range_walk+0x632/0x900 [ 36.244245] ? mas_walk+0x5c7/0x7c0 [ 36.244733] do_vmi_munmap+0x1f1/0x2b0 [ 36.245246] mmap_region+0x1f9/0x2660 [ 36.245730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.246254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.246979] ? __pfx_lock_acquire+0x10/0x10 [ 36.247542] ? __pfx_mmap_region+0x10/0x10 [ 36.248074] ? security_mmap_addr+0x7d/0xa0 [ 36.248617] ? get_unmapped_area+0x1f5/0x3f0 [ 36.249244] do_mmap+0x854/0xf00 [ 36.249699] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.250195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.250839] ksys_mmap_pgoff+0x3af/0x500 [ 36.251539] do_syscall_64+0x3f/0x90 [ 36.252078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.252903] RIP: 0033:0x7f3b8096ed82 [ 36.253403] 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 [ 36.255704] RSP: 002b:00007ffd3e728c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.256674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b8096ed82 [ 36.257588] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b7fda8000 [ 36.258543] RBP: 00007f3b7fda8000 R08: 0000000000000009 R09: 0000000000001000 [ 36.259468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0e7c2cec0 [ 36.260322] R13: 00007ffd3e728c50 R14: 00007ffd3e728c80 R15: 00007ffd3e728fe0 [ 36.261182] [ 36.261473] [ 36.261688] Allocated by task 211: [ 36.262117] kasan_save_stack+0x22/0x50 [ 36.262683] kasan_set_track+0x25/0x30 [ 36.263416] __kasan_slab_alloc+0x59/0x70 [ 36.264052] kmem_cache_alloc+0x16b/0x370 [ 36.264705] vm_area_dup+0x20/0x160 [ 36.265222] __split_vma+0x170/0x950 [ 36.265742] split_vma+0xc6/0x110 [ 36.266328] mprotect_fixup+0x8d2/0xb30 [ 36.266902] do_mprotect_pkey+0x87e/0xd40 [ 36.267565] __x64_sys_mprotect+0x78/0xc0 [ 36.268181] do_syscall_64+0x3f/0x90 [ 36.268720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.269455] [ 36.269695] Freed by task 13: [ 36.270130] kasan_save_stack+0x22/0x50 [ 36.270689] kasan_set_track+0x25/0x30 [ 36.271256] kasan_save_free_info+0x2b/0x50 [ 36.271890] __kasan_slab_free+0x10a/0x190 [ 36.272541] kmem_cache_free+0x10d/0x4d0 [ 36.273058] rcu_core+0x8c8/0x2860 [ 36.273551] __do_softirq+0x1b7/0x7d4 [ 36.274043] [ 36.274264] Last potentially related work creation: [ 36.274894] kasan_save_stack+0x22/0x50 [ 36.275435] __kasan_record_aux_stack+0x8e/0xa0 [ 36.276008] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.276824] remove_vma+0x139/0x170 [ 36.277421] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.278063] do_vmi_munmap+0x1f1/0x2b0 [ 36.278636] __vm_munmap+0x138/0x3a0 [ 36.279203] __x64_sys_munmap+0x59/0x80 [ 36.279906] do_syscall_64+0x3f/0x90 [ 36.280471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.281184] [ 36.281414] The buggy address belongs to the object at ffff88800e14dae0 [ 36.281414] which belongs to the cache vm_area_struct of size 168 [ 36.282993] The buggy address is located 88 bytes inside of [ 36.282993] freed 168-byte region [ffff88800e14dae0, ffff88800e14db88) [ 36.284532] [ 36.284776] The buggy address belongs to the physical page: [ 36.285522] page:00000000da740b50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe14d [ 36.286727] memcg:ffff88801817f801 [ 36.287235] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.287953] page_type: 0xffffffff() [ 36.288459] raw: 0100000000000200 ffff8880087a0c80 ffffea00006045c0 0000000000000008 [ 36.289660] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801817f801 [ 36.290770] page dumped because: kasan: bad access detected [ 36.291578] [ 36.291834] Memory state around the buggy address: [ 36.292506] ffff88800e14da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.293480] ffff88800e14da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.294511] >ffff88800e14db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.295485] ^ [ 36.296165] ffff88800e14db80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 36.297141] ffff88800e14dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.298109] ================================================================== [ 36.299738] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.289359] BUG: Bad rss-counter state mm:000000003bd9cb1e type:MM_FILEPAGES val:33 [ 38.290098] BUG: Bad rss-counter state mm:000000003bd9cb1e type:MM_ANONPAGES val:22 [ 38.683869] BUG: Bad rss-counter state mm:000000001900e2ce type:MM_FILEPAGES val:33 [ 38.684734] BUG: Bad rss-counter state mm:000000001900e2ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1950' (ECDSA) to the list of known hosts. 2023/06/21 00:08:55 fuzzer started 2023/06/21 00:08:55 dialing manager at localhost:36067 2023/06/21 00:08:55 checking machine... 2023/06/21 00:08:55 checking revisions... [ 39.239676] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:08:55 testing simple program... [ 39.277716] cgroup: Unknown subsys name 'net' [ 39.381527] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:08:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000040 RDI=ffff88806ce09bd0 RBP=ffffffff813782f8 RSP=ffff88806ce09bc8 R8 =0000000000000002 R9 =0000000000000006 R10=ffffed1002e47f56 R11=ffff888008c04000 R12=0000000000000000 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88801723fb30 RIP=ffffffff813ad694 RFL=00000282 [--S----] 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=00007ffcb47aef08 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f0f32789510000055a5cf39b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800db11b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff88800db11f34 RBP=ffff88800db11b40 RSP=ffff88800d9ff5f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800db11b40 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff8880084c6140 RIP=ffffffff8137459d RFL=00000213 [----A-C] 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 00007fc9fda41900 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=000055c4c33c9b88 CR3=00000000181d0000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000