syzkaller login: [ 30.021215] BUG: Bad rss-counter state mm:000000006337cbc1 type:MM_FILEPAGES val:33 [ 30.022414] BUG: Bad rss-counter state mm:000000006337cbc1 type:MM_ANONPAGES val:22 [ 30.156972] ================================================================== [ 30.157888] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.158836] Read of size 8 at addr ffff88800df14880 by task sshd/219 [ 30.159631] [ 30.160002] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.160883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.161874] Call Trace: [ 30.162190] [ 30.162481] dump_stack_lvl+0x91/0xf0 [ 30.162964] print_report+0xcc/0x620 [ 30.163452] ? __virt_addr_valid+0x102/0x340 [ 30.164018] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.164627] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.165251] kasan_report+0xbe/0xf0 [ 30.165727] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.166350] vma_interval_tree_remove+0xc75/0xec0 [ 30.166948] vma_prepare+0xc54/0x11a0 [ 30.167440] __split_vma+0x5af/0x950 [ 30.167926] ? __pfx___split_vma+0x10/0x10 [ 30.168456] ? find_held_lock+0x2c/0x110 [ 30.168976] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.169563] ? lock_is_held_type+0x9f/0x120 [ 30.170112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.170720] ? mtree_range_walk+0x632/0x900 [ 30.171271] ? mas_walk+0x5c7/0x7c0 [ 30.171783] do_vmi_munmap+0x1f1/0x2b0 [ 30.172278] mmap_region+0x1f9/0x2660 [ 30.172765] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.173271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.173993] ? __pfx_lock_acquire+0x10/0x10 [ 30.174523] ? __pfx_mmap_region+0x10/0x10 [ 30.175051] ? security_mmap_addr+0x7d/0xa0 [ 30.175594] ? get_unmapped_area+0x1f5/0x3f0 [ 30.176146] do_mmap+0x854/0xf00 [ 30.176588] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.177094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.177657] ksys_mmap_pgoff+0x3af/0x500 [ 30.178166] do_syscall_64+0x3f/0x90 [ 30.178650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.179303] RIP: 0033:0x7f2c086bbd82 [ 30.179780] 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 [ 30.181915] RSP: 002b:00007fffdd55ee58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.182826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c086bbd82 [ 30.183703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c07af5000 [ 30.184556] RBP: 00007f2c07af5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.185407] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6fc7e8ec0 [ 30.186264] R13: 00007fffdd55ee70 R14: 00007fffdd55eea0 R15: 00007fffdd55f200 [ 30.187129] [ 30.187422] [ 30.187650] Allocated by task 212: [ 30.188086] kasan_save_stack+0x22/0x50 [ 30.188590] kasan_set_track+0x25/0x30 [ 30.189085] __kasan_slab_alloc+0x59/0x70 [ 30.189619] kmem_cache_alloc+0x16b/0x370 [ 30.190145] vm_area_dup+0x20/0x160 [ 30.190604] __split_vma+0x170/0x950 [ 30.191076] split_vma+0xc6/0x110 [ 30.191512] mprotect_fixup+0x8d2/0xb30 [ 30.192039] do_mprotect_pkey+0x87e/0xd40 [ 30.192570] __x64_sys_mprotect+0x78/0xc0 [ 30.193100] do_syscall_64+0x3f/0x90 [ 30.193584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.194236] [ 30.194453] Freed by task 209: [ 30.194849] kasan_save_stack+0x22/0x50 [ 30.195361] kasan_set_track+0x25/0x30 [ 30.195870] kasan_save_free_info+0x2b/0x50 [ 30.196407] __kasan_slab_free+0x10a/0x190 [ 30.196945] kmem_cache_free+0x10d/0x4d0 [ 30.197455] rcu_core+0x8c8/0x2860 [ 30.197905] __do_softirq+0x1b7/0x7d4 [ 30.198385] [ 30.198601] Last potentially related work creation: [ 30.199187] kasan_save_stack+0x22/0x50 [ 30.199706] __kasan_record_aux_stack+0x8e/0xa0 [ 30.200284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.200935] remove_vma+0x139/0x170 [ 30.201463] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.202026] do_vmi_munmap+0x1f1/0x2b0 [ 30.202515] __vm_munmap+0x138/0x3a0 [ 30.202993] __x64_sys_munmap+0x59/0x80 [ 30.203494] do_syscall_64+0x3f/0x90 [ 30.203982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.204625] [ 30.204846] Second to last potentially related work creation: [ 30.205532] kasan_save_stack+0x22/0x50 [ 30.206042] __kasan_record_aux_stack+0x8e/0xa0 [ 30.206615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.207268] remove_vma+0x139/0x170 [ 30.207732] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.208296] do_vmi_munmap+0x1f1/0x2b0 [ 30.208787] move_vma.constprop.0+0x88a/0x1ba0 [ 30.209368] __do_sys_mremap+0xb78/0x1780 [ 30.209894] do_syscall_64+0x3f/0x90 [ 30.210374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.211013] [ 30.211234] The buggy address belongs to the object at ffff88800df14828 [ 30.211234] which belongs to the cache vm_area_struct of size 168 [ 30.212723] The buggy address is located 88 bytes inside of [ 30.212723] freed 168-byte region [ffff88800df14828, ffff88800df148d0) [ 30.214129] [ 30.214346] The buggy address belongs to the physical page: [ 30.215013] page:00000000122060b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf14 [ 30.216105] memcg:ffff88800e29cb01 [ 30.216534] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.217182] page_type: 0xffffffff() [ 30.217634] raw: 0100000000000200 ffff8880087a0c80 ffffea0000361b80 dead000000000006 [ 30.218561] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e29cb01 [ 30.219475] page dumped because: kasan: bad access detected [ 30.220151] [ 30.220369] Memory state around the buggy address: [ 30.220953] ffff88800df14780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.221813] ffff88800df14800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.222662] >ffff88800df14880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.223515] ^ [ 30.223959] ffff88800df14900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.224819] ffff88800df14980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.225672] ================================================================== [ 30.226597] Disabling lock debugging due to kernel taint [ 32.802562] BUG: Bad rss-counter state mm:000000003db50db9 type:MM_FILEPAGES val:33 [ 32.803791] BUG: Bad rss-counter state mm:000000003db50db9 type:MM_ANONPAGES val:22 [ 33.293953] BUG: Bad rss-counter state mm:00000000cf74a0d1 type:MM_FILEPAGES val:33 [ 33.295168] BUG: Bad rss-counter state mm:00000000cf74a0d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2697' (ECDSA) to the list of known hosts. 2023/06/21 10:45:01 fuzzer started 2023/06/21 10:45:01 dialing manager at localhost:36067 2023/06/21 10:45:01 checking machine... 2023/06/21 10:45:01 checking revisions... [ 33.975641] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:45:01 testing simple program... [ 34.027196] cgroup: Unknown subsys name 'net' [ 34.076296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:45:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801835f2d8 RCX=ffffffff861386ee RDX=1ffff1100306be5b RSI=ffff88801835f6b0 RDI=ffff88801835f2d8 RBP=ffff88801835f6b0 RSP=ffff88801835f230 R8 =ffffffff861386f2 R9 =ffff88801835f318 R10=0000000000038001 R11=0000000000020c51 R12=0000000000000008 R13=ffff88801835f320 R14=ffff88801835f6b8 R15=ffff88801835f2d8 RIP=ffffffff81130416 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 00007ff160204900 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=00007ff1607bb618 CR3=000000000ee7e000 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=2030303a35343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a35343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f40ad617760 CR3=000000000982a000 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=bc08a0a8fa36a3b7e84cb9787979be07 XMM02=ec2efd57dc4c00df000000000011f628 XMM03=0ca020ec8abfa3b1000000000011f6f8 XMM04=bdeb883534b1f49b00000000000ae988 XMM05=dfcdbad4f1609c370000000000133658 XMM06=d7d975fba429aab600000000001324c0 XMM07=e042d86d42eb936e0000000000122a48 XMM08=0ca020ec8abfa3b1000000000011f6f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000