syzkaller login: [ 39.383014] BUG: Bad rss-counter state mm:000000006684521c type:MM_FILEPAGES val:33 [ 39.384248] BUG: Bad rss-counter state mm:000000006684521c type:MM_ANONPAGES val:22 [ 39.573278] ================================================================== [ 39.574207] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.575153] Read of size 8 at addr ffff88800ecb6d08 by task sshd/223 [ 39.576043] [ 39.576311] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.577198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.578196] Call Trace: [ 39.578537] [ 39.578817] dump_stack_lvl+0x91/0xf0 [ 39.579325] print_report+0xcc/0x620 [ 39.579824] ? __virt_addr_valid+0x102/0x340 [ 39.580396] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.581015] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.581653] kasan_report+0xbe/0xf0 [ 39.582173] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.582799] vma_interval_tree_remove+0xc75/0xec0 [ 39.583416] vma_prepare+0xc54/0x11a0 [ 39.583911] __split_vma+0x5af/0x950 [ 39.584400] ? __pfx___split_vma+0x10/0x10 [ 39.584937] ? find_held_lock+0x2c/0x110 [ 39.585474] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.586050] ? lock_is_held_type+0x9f/0x120 [ 39.586616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.587249] ? mtree_range_walk+0x632/0x900 [ 39.587830] ? mas_walk+0x5c7/0x7c0 [ 39.588332] do_vmi_munmap+0x1f1/0x2b0 [ 39.588832] mmap_region+0x1f9/0x2660 [ 39.589333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.589853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.590590] ? __pfx_lock_acquire+0x10/0x10 [ 39.591149] ? __pfx_mmap_region+0x10/0x10 [ 39.591699] ? security_mmap_addr+0x7d/0xa0 [ 39.592242] ? get_unmapped_area+0x1f5/0x3f0 [ 39.592798] do_mmap+0x854/0xf00 [ 39.593254] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.593752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.594333] ksys_mmap_pgoff+0x3af/0x500 [ 39.594840] do_syscall_64+0x3f/0x90 [ 39.595350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.596011] RIP: 0033:0x7f2e917c0d82 [ 39.596493] 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 [ 39.598640] RSP: 002b:00007ffffd7b1d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.599580] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e917c0d82 [ 39.600455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e90bfa000 [ 39.601332] RBP: 00007f2e90bfa000 R08: 0000000000000009 R09: 0000000000001000 [ 39.602203] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a9707bf70 [ 39.603052] R13: 00007ffffd7b1d30 R14: 00007ffffd7b1d60 R15: 00007ffffd7b20c0 [ 39.603941] [ 39.604251] [ 39.604468] Allocated by task 214: [ 39.604897] kasan_save_stack+0x22/0x50 [ 39.605425] kasan_set_track+0x25/0x30 [ 39.605920] __kasan_slab_alloc+0x59/0x70 [ 39.606477] kmem_cache_alloc+0x16b/0x370 [ 39.606998] vm_area_dup+0x20/0x160 [ 39.607492] __split_vma+0x170/0x950 [ 39.607976] split_vma+0xc6/0x110 [ 39.608440] mprotect_fixup+0x8d2/0xb30 [ 39.608947] do_mprotect_pkey+0x87e/0xd40 [ 39.609479] __x64_sys_mprotect+0x78/0xc0 [ 39.610003] do_syscall_64+0x3f/0x90 [ 39.610509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.611177] [ 39.611395] Freed by task 214: [ 39.611806] kasan_save_stack+0x22/0x50 [ 39.612330] kasan_set_track+0x25/0x30 [ 39.612831] kasan_save_free_info+0x2b/0x50 [ 39.613383] __kasan_slab_free+0x10a/0x190 [ 39.613926] kmem_cache_free+0x10d/0x4d0 [ 39.614454] rcu_core+0x8c8/0x2860 [ 39.614902] __do_softirq+0x1b7/0x7d4 [ 39.615407] [ 39.615657] Last potentially related work creation: [ 39.616270] kasan_save_stack+0x22/0x50 [ 39.616782] __kasan_record_aux_stack+0x8e/0xa0 [ 39.617447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.618114] remove_vma+0x139/0x170 [ 39.618570] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.619145] do_vmi_munmap+0x1f1/0x2b0 [ 39.619665] __vm_munmap+0x138/0x3a0 [ 39.620160] __x64_sys_munmap+0x59/0x80 [ 39.620662] do_syscall_64+0x3f/0x90 [ 39.621153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.621797] [ 39.622019] Second to last potentially related work creation: [ 39.622707] kasan_save_stack+0x22/0x50 [ 39.623230] __kasan_record_aux_stack+0x8e/0xa0 [ 39.623824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.624483] remove_vma+0x139/0x170 [ 39.624953] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.625542] do_vmi_munmap+0x1f1/0x2b0 [ 39.626039] mmap_region+0x1f9/0x2660 [ 39.626534] do_mmap+0x854/0xf00 [ 39.626971] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.627507] ksys_mmap_pgoff+0x3af/0x500 [ 39.628019] do_syscall_64+0x3f/0x90 [ 39.628507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.629173] [ 39.629392] The buggy address belongs to the object at ffff88800ecb6cb0 [ 39.629392] which belongs to the cache vm_area_struct of size 168 [ 39.630893] The buggy address is located 88 bytes inside of [ 39.630893] freed 168-byte region [ffff88800ecb6cb0, ffff88800ecb6d58) [ 39.632345] [ 39.632565] The buggy address belongs to the physical page: [ 39.633239] page:000000005adced18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecb6 [ 39.634333] memcg:ffff88800d68d401 [ 39.634761] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.635458] page_type: 0xffffffff() [ 39.635916] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5740 dead000000000008 [ 39.636855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d68d401 [ 39.637787] page dumped because: kasan: bad access detected [ 39.638472] [ 39.638691] Memory state around the buggy address: [ 39.639281] ffff88800ecb6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.640191] ffff88800ecb6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.641057] >ffff88800ecb6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.641918] ^ [ 39.642374] ffff88800ecb6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.643246] ffff88800ecb6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.644160] ================================================================== [ 39.645098] Disabling lock debugging due to kernel taint [ 42.233523] BUG: Bad rss-counter state mm:000000000ff39a5a type:MM_FILEPAGES val:33 [ 42.234672] BUG: Bad rss-counter state mm:000000000ff39a5a type:MM_ANONPAGES val:22 [ 42.628244] BUG: Bad rss-counter state mm:000000005517b539 type:MM_FILEPAGES val:33 [ 42.629460] BUG: Bad rss-counter state mm:000000005517b539 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57272' (ECDSA) to the list of known hosts. 2023/06/19 23:11:17 fuzzer started 2023/06/19 23:11:17 dialing manager at localhost:44161 2023/06/19 23:11:17 checking machine... 2023/06/19 23:11:17 checking revisions... [ 43.353770] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:11:17 testing simple program... [ 43.402439] cgroup: Unknown subsys name 'net' [ 43.443553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:11:06 Registers: info registers vcpu 0 RAX=ffffffff8613bf77 RBX=0000000000000001 RCX=ffffffff8613bf72 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff85dffb98 RBP=ffff888009f07820 RSP=ffff888009f07758 R8 =ffffffff8613bf72 R9 =ffff888009f07808 R10=0000000000038001 R11=00000000000219f1 R12=ffff888009f07828 R13=ffff888009f07810 R14=ffff888009f07809 R15=ffff888009f077c8 RIP=ffffffff81130a6e 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 00007ff22c662900 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=00007ff22cc17650 CR3=0000000016d04000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f0118463b80 CR3=000000000d7be000 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=0239ed744ede699e2545c17442f53190 XMM02=eff9b2d0a8fce9cb000000000011ca78 XMM03=2c67c8bc2e329bc3000000000011cba0 XMM04=3c35a1444cd6a97500000000000ae988 XMM05=6d502b124d4f3c120000000000136428 XMM06=00c3ffa147b8d8570000000000135218 XMM07=fb795ef6d65770560000000000123cf8 XMM08=2c67c8bc2e329bc3000000000011cba0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000