[ 24.131818] BUG: Bad rss-counter state mm:000000008345d23c type:MM_FILEPAGES val:33 [ 24.133021] BUG: Bad rss-counter state mm:000000008345d23c type:MM_ANONPAGES val:22 [ 24.171104] ================================================================== [ 24.172027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.173008] Read of size 8 at addr ffff8880101ca6b0 by task sshd/220 [ 24.173945] [ 24.174174] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.175060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.176095] Call Trace: [ 24.176432] [ 24.176725] dump_stack_lvl+0x91/0xf0 [ 24.177228] print_report+0xcc/0x620 [ 24.177720] ? __virt_addr_valid+0x102/0x340 [ 24.178275] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.178914] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.179543] kasan_report+0xbe/0xf0 [ 24.180045] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.180705] vma_interval_tree_remove+0xc75/0xec0 [ 24.181309] vma_prepare+0xc54/0x11a0 [ 24.181793] __split_vma+0x5af/0x950 [ 24.182265] ? __pfx___split_vma+0x10/0x10 [ 24.182808] ? find_held_lock+0x2c/0x110 [ 24.183332] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.183896] ? lock_is_held_type+0x9f/0x120 [ 24.184465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.185069] ? mtree_range_walk+0x632/0x900 [ 24.185628] ? mas_walk+0x5c7/0x7c0 [ 24.186109] do_vmi_munmap+0x1f1/0x2b0 [ 24.186622] mmap_region+0x1f9/0x2660 [ 24.187119] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.187640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.188364] ? __pfx_lock_acquire+0x10/0x10 [ 24.188897] ? __pfx_mmap_region+0x10/0x10 [ 24.189433] ? security_mmap_addr+0x7d/0xa0 [ 24.189969] ? get_unmapped_area+0x1f5/0x3f0 [ 24.190527] do_mmap+0x854/0xf00 [ 24.190987] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.191494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.192059] ksys_mmap_pgoff+0x3af/0x500 [ 24.192606] do_syscall_64+0x3f/0x90 [ 24.193095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.193760] RIP: 0033:0x7fb542d81d82 [ 24.194218] 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 [ 24.196427] RSP: 002b:00007ffc22664458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.197365] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb542d81d82 [ 24.198226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5421bb000 [ 24.199071] RBP: 00007fb5421bb000 R08: 0000000000000009 R09: 0000000000001000 [ 24.199916] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c43073fec0 [ 24.200776] R13: 00007ffc22664470 R14: 00007ffc226644a0 R15: 00007ffc22664800 [ 24.201649] [ 24.201952] [ 24.202170] Allocated by task 213: [ 24.202602] kasan_save_stack+0x22/0x50 [ 24.203133] kasan_set_track+0x25/0x30 [ 24.203650] __kasan_slab_alloc+0x59/0x70 [ 24.204204] kmem_cache_alloc+0x16b/0x370 [ 24.204725] vm_area_dup+0x20/0x160 [ 24.205184] __split_vma+0x170/0x950 [ 24.205651] split_vma+0xc6/0x110 [ 24.206105] mprotect_fixup+0x8d2/0xb30 [ 24.206616] do_mprotect_pkey+0x87e/0xd40 [ 24.207137] __x64_sys_mprotect+0x78/0xc0 [ 24.207659] do_syscall_64+0x3f/0x90 [ 24.208152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.208822] [ 24.209040] Freed by task 213: [ 24.209443] kasan_save_stack+0x22/0x50 [ 24.209951] kasan_set_track+0x25/0x30 [ 24.210446] kasan_save_free_info+0x2b/0x50 [ 24.210983] __kasan_slab_free+0x10a/0x190 [ 24.211529] kmem_cache_free+0x10d/0x4d0 [ 24.212123] rcu_core+0x8c8/0x2860 [ 24.212597] __do_softirq+0x1b7/0x7d4 [ 24.213081] [ 24.213307] Last potentially related work creation: [ 24.213898] kasan_save_stack+0x22/0x50 [ 24.214406] __kasan_record_aux_stack+0x8e/0xa0 [ 24.214989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.215635] remove_vma+0x139/0x170 [ 24.216102] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.216670] do_vmi_munmap+0x1f1/0x2b0 [ 24.217165] __vm_munmap+0x138/0x3a0 [ 24.217636] __x64_sys_munmap+0x59/0x80 [ 24.218144] do_syscall_64+0x3f/0x90 [ 24.218628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.219284] [ 24.219497] Second to last potentially related work creation: [ 24.220204] kasan_save_stack+0x22/0x50 [ 24.220723] __kasan_record_aux_stack+0x8e/0xa0 [ 24.221308] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.221969] remove_vma+0x139/0x170 [ 24.222426] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.222985] do_vmi_munmap+0x1f1/0x2b0 [ 24.223481] __vm_munmap+0x138/0x3a0 [ 24.223958] elf_map+0x26f/0x310 [ 24.224423] load_elf_binary+0x3417/0x5030 [ 24.224957] bprm_execve+0x803/0x1940 [ 24.225432] do_execveat_common+0x734/0x8e0 [ 24.225985] __x64_sys_execve+0x93/0xc0 [ 24.226481] do_syscall_64+0x3f/0x90 [ 24.226958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.227604] [ 24.227823] The buggy address belongs to the object at ffff8880101ca658 [ 24.227823] which belongs to the cache vm_area_struct of size 168 [ 24.229323] The buggy address is located 88 bytes inside of [ 24.229323] freed 168-byte region [ffff8880101ca658, ffff8880101ca700) [ 24.230759] [ 24.230977] The buggy address belongs to the physical page: [ 24.231633] page:00000000c93a63f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101ca [ 24.232750] memcg:ffff88800d4f5001 [ 24.233177] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.233834] page_type: 0xffffffff() [ 24.234286] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393500 dead000000000006 [ 24.235211] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4f5001 [ 24.236124] page dumped because: kasan: bad access detected [ 24.236805] [ 24.237030] Memory state around the buggy address: [ 24.237616] ffff8880101ca580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.238481] ffff8880101ca600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.239331] >ffff8880101ca680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.240198] ^ [ 24.240787] ffff8880101ca700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.241638] ffff8880101ca780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.242490] ================================================================== [ 24.243525] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.583891] BUG: Bad rss-counter state mm:0000000047d3ebe2 type:MM_FILEPAGES val:33 [ 26.584965] BUG: Bad rss-counter state mm:0000000047d3ebe2 type:MM_ANONPAGES val:22 [ 27.084670] BUG: Bad rss-counter state mm:000000009bcdf494 type:MM_FILEPAGES val:33 [ 27.085755] BUG: Bad rss-counter state mm:000000009bcdf494 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62017' (ECDSA) to the list of known hosts. 2023/06/21 04:07:24 fuzzer started 2023/06/21 04:07:24 dialing manager at localhost:36067 2023/06/21 04:07:24 checking machine... 2023/06/21 04:07:24 checking revisions... [ 27.763834] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:07:24 testing simple program... [ 27.824509] cgroup: Unknown subsys name 'net' [ 27.857545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:07:23 Registers: info registers vcpu 0 RAX=000000000020d396 RBX=0000000000000000 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8486cca4 RBP=ffff88806ce09d58 RSP=ffff88806ce09cd0 R8 =0000000000000001 R9 =0000000000000068 R10=0000000000000000 R11=00000000fa83b2da R12=ffff888016b51bc0 R13=ffffffff85d3e400 R14=0000000000000438 R15=00000000000000a0 RIP=ffffffff81293aed RFL=00000016 [----AP-] 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=00007fc57ade5a20 CR3=000000000eea2000 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=2033323a37303a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000282 RCX=00000000800d000c RDX=0000000000000001 RSI=ffffea0000326280 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888009dcf4c0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000326280 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea0000326280 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff81806246 RFL=00000082 [--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 00007f8573127900 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=00007f85736de618 CR3=0000000009752000 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