syzkaller login: [ 93.969927] BUG: Bad rss-counter state mm:00000000cb91777e type:MM_FILEPAGES val:33 [ 93.971002] BUG: Bad rss-counter state mm:00000000cb91777e type:MM_ANONPAGES val:22 [ 94.142704] ================================================================== [ 94.143676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 94.144689] Read of size 8 at addr ffff88801a2a43f8 by task sshd/221 [ 94.145610] [ 94.145848] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 94.146941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 94.147995] Call Trace: [ 94.148336] <TASK> [ 94.148638] dump_stack_lvl+0x91/0xf0 [ 94.149174] print_report+0xcc/0x620 [ 94.149698] ? __virt_addr_valid+0x102/0x340 [ 94.150287] ? vma_interval_tree_remove+0xc75/0xec0 [ 94.150943] ? vma_interval_tree_remove+0xc75/0xec0 [ 94.151604] kasan_report+0xbe/0xf0 [ 94.152108] ? vma_interval_tree_remove+0xc75/0xec0 [ 94.152795] vma_interval_tree_remove+0xc75/0xec0 [ 94.153439] vma_prepare+0xc54/0x11a0 [ 94.153958] __split_vma+0x5af/0x950 [ 94.154465] ? __pfx___split_vma+0x10/0x10 [ 94.155033] ? find_held_lock+0x2c/0x110 [ 94.155590] do_vmi_align_munmap+0x2ba/0x11f0 [ 94.156196] ? lock_is_held_type+0x9f/0x120 [ 94.156797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 94.157448] ? mtree_range_walk+0x632/0x900 [ 94.158039] ? mas_walk+0x5c7/0x7c0 [ 94.158552] do_vmi_munmap+0x1f1/0x2b0 [ 94.159084] mmap_region+0x1f9/0x2660 [ 94.159603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 94.160144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 94.160912] ? __pfx_lock_acquire+0x10/0x10 [ 94.161480] ? __pfx_mmap_region+0x10/0x10 [ 94.162051] ? security_mmap_addr+0x7d/0xa0 [ 94.162615] ? get_unmapped_area+0x1f5/0x3f0 [ 94.163202] do_mmap+0x854/0xf00 [ 94.163675] vm_mmap_pgoff+0x1a6/0x3a0 [ 94.164208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 94.164816] ksys_mmap_pgoff+0x3af/0x500 [ 94.165369] do_syscall_64+0x3f/0x90 [ 94.165879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 94.166571] RIP: 0033:0x7f596a9fcd82 [ 94.167055] 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 [ 94.169340] RSP: 002b:00007ffcea2f4fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 94.170308] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f596a9fcd82 [ 94.171216] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5969e36000 [ 94.172127] RBP: 00007f5969e36000 R08: 0000000000000009 R09: 0000000000001000 [ 94.173037] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebe02fcec0 [ 94.173943] R13: 00007ffcea2f4fe0 R14: 00007ffcea2f5010 R15: 00007ffcea2f5370 [ 94.174858] </TASK> [ 94.175171] [ 94.175401] Allocated by task 214: [ 94.175858] kasan_save_stack+0x22/0x50 [ 94.176401] kasan_set_track+0x25/0x30 [ 94.176930] __kasan_slab_alloc+0x59/0x70 [ 94.177493] kmem_cache_alloc+0x16b/0x370 [ 94.178045] vm_area_dup+0x20/0x160 [ 94.178528] __split_vma+0x170/0x950 [ 94.179026] split_vma+0xc6/0x110 [ 94.179492] mprotect_fixup+0x8d2/0xb30 [ 94.180024] do_mprotect_pkey+0x87e/0xd40 [ 94.180573] __x64_sys_mprotect+0x78/0xc0 [ 94.181138] do_syscall_64+0x3f/0x90 [ 94.181649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 94.182338] [ 94.182570] Freed by task 19: [ 94.182974] kasan_save_stack+0x22/0x50 [ 94.183514] kasan_set_track+0x25/0x30 [ 94.184046] kasan_save_free_info+0x2b/0x50 [ 94.184615] __kasan_slab_free+0x10a/0x190 [ 94.185196] kmem_cache_free+0x10d/0x4d0 [ 94.185744] rcu_core+0x8c8/0x2860 [ 94.186217] __do_softirq+0x1b7/0x7d4 [ 94.186732] [ 94.186968] Last potentially related work creation: [ 94.187595] kasan_save_stack+0x22/0x50 [ 94.188140] __kasan_record_aux_stack+0x8e/0xa0 [ 94.188769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 94.189458] remove_vma+0x139/0x170 [ 94.189940] do_vmi_align_munmap+0xd4a/0x11f0 [ 94.190538] do_vmi_munmap+0x1f1/0x2b0 [ 94.191055] __vm_munmap+0x138/0x3a0 [ 94.191559] __x64_sys_munmap+0x59/0x80 [ 94.192095] do_syscall_64+0x3f/0x90 [ 94.192602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 94.193296] [ 94.193523] The buggy address belongs to the object at ffff88801a2a43a0 [ 94.193523] which belongs to the cache vm_area_struct of size 168 [ 94.195096] The buggy address is located 88 bytes inside of [ 94.195096] freed 168-byte region [ffff88801a2a43a0, ffff88801a2a4448) [ 94.196601] [ 94.196850] The buggy address belongs to the physical page: [ 94.197559] page:00000000795ee773 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a4 [ 94.198732] memcg:ffff88800fd06101 [ 94.199193] flags: 0x100000000000200(slab|node=0|zone=1) [ 94.199883] page_type: 0xffffffff() [ 94.200368] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 94.201355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd06101 [ 94.202320] page dumped because: kasan: bad access detected [ 94.203022] [ 94.203249] Memory state around the buggy address: [ 94.203865] ffff88801a2a4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 94.204798] ffff88801a2a4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 94.205710] >ffff88801a2a4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 94.206615] ^ [ 94.207513] ffff88801a2a4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 94.208427] ffff88801a2a4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 94.209336] ================================================================== [ 94.210415] Disabling lock debugging due to kernel taint [ 96.192014] BUG: Bad rss-counter state mm:00000000a2cd12ca type:MM_FILEPAGES val:33 [ 96.193119] BUG: Bad rss-counter state mm:00000000a2cd12ca type:MM_ANONPAGES val:22 [ 96.578737] BUG: Bad rss-counter state mm:00000000206526b2 type:MM_FILEPAGES val:33 [ 96.579414] BUG: Bad rss-counter state mm:00000000206526b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13095' (ECDSA) to the list of known hosts. 2023/06/19 12:21:17 fuzzer started 2023/06/19 12:21:17 dialing manager at localhost:44161 2023/06/19 12:21:17 checking machine... 2023/06/19 12:21:17 checking revisions... [ 97.145170] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:21:17 testing simple program... [ 97.207185] cgroup: Unknown subsys name 'net' [ 97.278024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:20:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801695d5e0 RCX=ffffffff812e0423 RDX=1ffff11002d2babe RSI=0000000000000004 RDI=ffff88801695d5e0 RBP=ffff88801695d5e0 RSP=ffff88801588fa08 R8 =0000000000000000 R9 =ffffed1002d2babc R10=ffff88801695d5e3 R11=00000000000b6c88 R12=ffff88801695d5f0 R13=ffff888016a4b300 R14=0000000000000001 R15=ffff88801695d5e0 RIP=ffffffff812e0470 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f254bf35900 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=00007f254b3c9ca0 CR3=000000000d7c6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b8a777cc98d044de00000000000ae988 XMM05=9be7b8aea2530177000000000013dc10 XMM06=c291bd5c70af25b9000000000013ca00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc58497628 CR3=0000000015aee000 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=2036313a31323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000