[ 26.035534] BUG: Bad rss-counter state mm:0000000095b6da14 type:MM_FILEPAGES val:33 [ 26.037758] BUG: Bad rss-counter state mm:0000000095b6da14 type:MM_ANONPAGES val:22 [ 26.197770] ================================================================== [ 26.198846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.199954] Read of size 8 at addr ffff88801961a798 by task sshd/219 [ 26.200997] [ 26.201263] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.202275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.203447] Call Trace: [ 26.203826] [ 26.204164] dump_stack_lvl+0x91/0xf0 [ 26.204766] print_report+0xcc/0x620 [ 26.205331] ? __virt_addr_valid+0x102/0x340 [ 26.205900] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.206486] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.207103] kasan_report+0xbe/0xf0 [ 26.207568] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.208192] vma_interval_tree_remove+0xc75/0xec0 [ 26.208790] vma_prepare+0xc54/0x11a0 [ 26.209262] __split_vma+0x5af/0x950 [ 26.209727] ? __pfx___split_vma+0x10/0x10 [ 26.210246] ? find_held_lock+0x2c/0x110 [ 26.210765] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.211316] ? lock_is_held_type+0x9f/0x120 [ 26.211846] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.212455] ? mtree_range_walk+0x632/0x900 [ 26.213023] ? mas_walk+0x5c7/0x7c0 [ 26.213501] do_vmi_munmap+0x1f1/0x2b0 [ 26.213991] mmap_region+0x1f9/0x2660 [ 26.214469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.214973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.215692] ? __pfx_lock_acquire+0x10/0x10 [ 26.216214] ? __pfx_mmap_region+0x10/0x10 [ 26.216752] ? security_mmap_addr+0x7d/0xa0 [ 26.217281] ? get_unmapped_area+0x1f5/0x3f0 [ 26.217812] do_mmap+0x854/0xf00 [ 26.218256] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.218756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.219310] ksys_mmap_pgoff+0x3af/0x500 [ 26.219815] do_syscall_64+0x3f/0x90 [ 26.220281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.220930] RIP: 0033:0x7fc313347d82 [ 26.221385] 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 [ 26.223477] RSP: 002b:00007ffc73e283f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.224370] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc313347d82 [ 26.225232] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc312781000 [ 26.226075] RBP: 00007fc312781000 R08: 0000000000000009 R09: 0000000000001000 [ 26.226904] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563487118b20 [ 26.227745] R13: 00007ffc73e28410 R14: 00007ffc73e28440 R15: 00007ffc73e287a0 [ 26.228584] [ 26.228884] [ 26.229102] Allocated by task 212: [ 26.229525] kasan_save_stack+0x22/0x50 [ 26.230026] kasan_set_track+0x25/0x30 [ 26.230512] __kasan_slab_alloc+0x59/0x70 [ 26.231025] kmem_cache_alloc+0x16b/0x370 [ 26.231549] vm_area_dup+0x20/0x160 [ 26.232002] __split_vma+0x170/0x950 [ 26.232466] split_vma+0xc6/0x110 [ 26.232903] mprotect_fixup+0x8d2/0xb30 [ 26.233398] do_mprotect_pkey+0x87e/0xd40 [ 26.233910] __x64_sys_mprotect+0x78/0xc0 [ 26.234425] do_syscall_64+0x3f/0x90 [ 26.234896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.235536] [ 26.235753] Freed by task 212: [ 26.236133] kasan_save_stack+0x22/0x50 [ 26.236622] kasan_set_track+0x25/0x30 [ 26.237122] kasan_save_free_info+0x2b/0x50 [ 26.237650] __kasan_slab_free+0x10a/0x190 [ 26.238186] kmem_cache_free+0x10d/0x4d0 [ 26.238689] rcu_core+0x8c8/0x2860 [ 26.239142] __do_softirq+0x1b7/0x7d4 [ 26.239616] [ 26.239834] Last potentially related work creation: [ 26.240416] kasan_save_stack+0x22/0x50 [ 26.240919] __kasan_record_aux_stack+0x8e/0xa0 [ 26.241491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.242191] remove_vma+0x139/0x170 [ 26.242639] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.243190] do_vmi_munmap+0x1f1/0x2b0 [ 26.243665] __vm_munmap+0x138/0x3a0 [ 26.244124] __x64_sys_munmap+0x59/0x80 [ 26.244619] do_syscall_64+0x3f/0x90 [ 26.245121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.245762] [ 26.245974] Second to last potentially related work creation: [ 26.246644] kasan_save_stack+0x22/0x50 [ 26.247141] __kasan_record_aux_stack+0x8e/0xa0 [ 26.247697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.248331] remove_vma+0x139/0x170 [ 26.248779] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.249333] do_vmi_munmap+0x1f1/0x2b0 [ 26.249807] mmap_region+0x1f9/0x2660 [ 26.250275] do_mmap+0x854/0xf00 [ 26.250692] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.251177] ksys_mmap_pgoff+0x3af/0x500 [ 26.251669] do_syscall_64+0x3f/0x90 [ 26.252137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.252776] [ 26.252984] The buggy address belongs to the object at ffff88801961a740 [ 26.252984] which belongs to the cache vm_area_struct of size 168 [ 26.254438] The buggy address is located 88 bytes inside of [ 26.254438] freed 168-byte region [ffff88801961a740, ffff88801961a7e8) [ 26.255825] [ 26.256044] The buggy address belongs to the physical page: [ 26.256702] page:00000000b5c6f838 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1961a [ 26.257797] memcg:ffff888018f72d01 [ 26.258221] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.258897] page_type: 0xffffffff() [ 26.259348] raw: 0100000000000200 ffff88800879fc80 ffffea000032a340 dead000000000007 [ 26.260252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f72d01 [ 26.261155] page dumped because: kasan: bad access detected [ 26.261807] [ 26.262021] Memory state around the buggy address: [ 26.262587] ffff88801961a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.263441] ffff88801961a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.264291] >ffff88801961a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.265150] ^ [ 26.265626] ffff88801961a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 26.266471] ffff88801961a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 26.267309] ================================================================== [ 26.268302] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.291249] BUG: Bad rss-counter state mm:000000004040fefe type:MM_FILEPAGES val:33 [ 28.292513] BUG: Bad rss-counter state mm:000000004040fefe type:MM_ANONPAGES val:22 [ 28.789089] BUG: Bad rss-counter state mm:000000006688c037 type:MM_FILEPAGES val:33 [ 28.790110] BUG: Bad rss-counter state mm:000000006688c037 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25376' (ECDSA) to the list of known hosts. 2023/06/19 16:06:56 fuzzer started 2023/06/19 16:06:57 dialing manager at localhost:44161 2023/06/19 16:06:57 checking machine... 2023/06/19 16:06:57 checking revisions... [ 29.365385] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:06:57 testing simple program... [ 29.426246] cgroup: Unknown subsys name 'net' [ 29.458663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:06:54 Registers: info registers vcpu 0 RAX=ffffffff83874b39 RBX=ffffffff85fc0370 RCX=ffffffff83874fbb RDX=0000000000000000 RSI=ffffffff863dcb36 RDI=ffffffff85fc0370 RBP=ffffffff85fc0374 RSP=ffff888015c2f650 R8 =ffffffff863dcb36 R9 =ffff888015c2f748 R10=0000000000038001 R11=0000000000091be7 R12=ffffffff85fc0370 R13=ffffffff85fc0370 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f96cde35900 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=00007f96ce3ec618 CR3=000000000c508000 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=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 info registers vcpu 1 RAX=0000000080000101 RBX=0000000000000000 RCX=ffffffff81143189 RDX=ffff888008d751c0 RSI=0000000000000100 RDI=0000000000000007 RBP=000000001b8b6c60 RSP=ffff88806cf09d78 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffea0000345140 R14=ffffffff813782a8 R15=ffff88800d145b80 RIP=ffffffff814c07eb 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 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=00007f05d8509570 CR3=00000000198ca000 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=2036353a36303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a36303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000