syzkaller login: [ 30.002478] BUG: Bad rss-counter state mm:00000000390964c7 type:MM_FILEPAGES val:33 [ 30.003676] BUG: Bad rss-counter state mm:00000000390964c7 type:MM_ANONPAGES val:22 [ 30.167625] ================================================================== [ 30.168730] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.169764] Read of size 8 at addr ffff88800e96aed8 by task sshd/219 [ 30.170625] [ 30.170834] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.171663] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.172631] Call Trace: [ 30.172943] [ 30.173219] dump_stack_lvl+0x91/0xf0 [ 30.173695] print_report+0xcc/0x620 [ 30.174159] ? __virt_addr_valid+0x102/0x340 [ 30.174698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.175300] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.175909] kasan_report+0xbe/0xf0 [ 30.176379] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.176990] vma_interval_tree_remove+0xc75/0xec0 [ 30.177586] vma_prepare+0xc54/0x11a0 [ 30.178056] __split_vma+0x5af/0x950 [ 30.178527] ? __pfx___split_vma+0x10/0x10 [ 30.179044] ? find_held_lock+0x2c/0x110 [ 30.179559] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.180105] ? lock_is_held_type+0x9f/0x120 [ 30.180650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.181242] ? mtree_range_walk+0x632/0x900 [ 30.181780] ? mas_walk+0x5c7/0x7c0 [ 30.182255] do_vmi_munmap+0x1f1/0x2b0 [ 30.182744] mmap_region+0x1f9/0x2660 [ 30.183243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.183757] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.184484] ? __pfx_lock_acquire+0x10/0x10 [ 30.185039] ? __pfx_mmap_region+0x10/0x10 [ 30.185569] ? security_mmap_addr+0x7d/0xa0 [ 30.186105] ? get_unmapped_area+0x1f5/0x3f0 [ 30.186666] do_mmap+0x854/0xf00 [ 30.187114] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.187622] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.188200] ksys_mmap_pgoff+0x3af/0x500 [ 30.188733] do_syscall_64+0x3f/0x90 [ 30.189225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.189886] RIP: 0033:0x7f6e91441d82 [ 30.190348] 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 [ 30.192541] RSP: 002b:00007ffed393dd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.193488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e91441d82 [ 30.194374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e9087b000 [ 30.195253] RBP: 00007f6e9087b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.196125] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611c5020b20 [ 30.196996] R13: 00007ffed393dd50 R14: 00007ffed393dd80 R15: 00007ffed393e0e0 [ 30.197877] [ 30.198171] [ 30.198389] Allocated by task 212: [ 30.198826] kasan_save_stack+0x22/0x50 [ 30.199338] kasan_set_track+0x25/0x30 [ 30.199849] __kasan_slab_alloc+0x59/0x70 [ 30.200392] kmem_cache_alloc+0x16b/0x370 [ 30.200949] vm_area_dup+0x20/0x160 [ 30.201417] __split_vma+0x170/0x950 [ 30.201902] split_vma+0xc6/0x110 [ 30.202359] mprotect_fixup+0x8d2/0xb30 [ 30.202884] do_mprotect_pkey+0x87e/0xd40 [ 30.203427] __x64_sys_mprotect+0x78/0xc0 [ 30.203967] do_syscall_64+0x3f/0x90 [ 30.204467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.205140] [ 30.205363] Freed by task 19: [ 30.205763] kasan_save_stack+0x22/0x50 [ 30.206287] kasan_set_track+0x25/0x30 [ 30.206805] kasan_save_free_info+0x2b/0x50 [ 30.207361] __kasan_slab_free+0x10a/0x190 [ 30.207913] kmem_cache_free+0x10d/0x4d0 [ 30.208452] rcu_core+0x8c8/0x2860 [ 30.208926] __do_softirq+0x1b7/0x7d4 [ 30.209426] [ 30.209649] Last potentially related work creation: [ 30.210266] kasan_save_stack+0x22/0x50 [ 30.210795] __kasan_record_aux_stack+0x8e/0xa0 [ 30.211385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.212045] remove_vma+0x139/0x170 [ 30.212519] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.213115] do_vmi_munmap+0x1f1/0x2b0 [ 30.213613] __vm_munmap+0x138/0x3a0 [ 30.214099] __x64_sys_munmap+0x59/0x80 [ 30.214620] do_syscall_64+0x3f/0x90 [ 30.215118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.215790] [ 30.216014] The buggy address belongs to the object at ffff88800e96ae80 [ 30.216014] which belongs to the cache vm_area_struct of size 168 [ 30.217555] The buggy address is located 88 bytes inside of [ 30.217555] freed 168-byte region [ffff88800e96ae80, ffff88800e96af28) [ 30.219021] [ 30.219241] The buggy address belongs to the physical page: [ 30.219926] page:00000000f273467c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe96a [ 30.221065] memcg:ffff88800fe45401 [ 30.221505] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.222171] page_type: 0xffffffff() [ 30.222640] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.223597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe45401 [ 30.224537] page dumped because: kasan: bad access detected [ 30.225244] [ 30.225472] Memory state around the buggy address: [ 30.226071] ffff88800e96ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.226960] ffff88800e96ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.227845] >ffff88800e96ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.228734] ^ [ 30.229479] ffff88800e96af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.230359] ffff88800e96af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.231242] ================================================================== [ 30.232338] Disabling lock debugging due to kernel taint [ 33.104550] BUG: Bad rss-counter state mm:00000000f3547671 type:MM_FILEPAGES val:33 [ 33.105565] BUG: Bad rss-counter state mm:00000000f3547671 type:MM_ANONPAGES val:22 [ 33.606576] BUG: Bad rss-counter state mm:000000004479c515 type:MM_FILEPAGES val:33 [ 33.607585] BUG: Bad rss-counter state mm:000000004479c515 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53230' (ECDSA) to the list of known hosts. 2023/06/20 23:14:51 fuzzer started 2023/06/20 23:14:51 dialing manager at localhost:36067 2023/06/20 23:14:51 checking machine... 2023/06/20 23:14:51 checking revisions... [ 34.311986] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:14:51 testing simple program... [ 34.351343] cgroup: Unknown subsys name 'net' [ 34.413164] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:14:50 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=00007fff1cc974c8 CR3=000000000dfd8000 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=2030353a34313a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a34313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018d19b40 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84d2de00 RSP=ffff888017e67d68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000117 R13=0000000000000000 R14=ffff88800ef5cba0 R15=0000000000000000 RIP=ffffffff812d905b RFL=00000286 [--S--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 00007fb4b8ba2900 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=00007fb4b9159618 CR3=000000000fc8a000 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