syzkaller login: [ 33.367650] BUG: Bad rss-counter state mm:00000000b3a01259 type:MM_FILEPAGES val:33 [ 33.369678] BUG: Bad rss-counter state mm:00000000b3a01259 type:MM_ANONPAGES val:22 [ 33.558768] ================================================================== [ 33.559691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.560651] Read of size 8 at addr ffff88800d9b7c20 by task sshd/220 [ 33.561510] [ 33.561738] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.562616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.563649] Call Trace: [ 33.563981] [ 33.564267] dump_stack_lvl+0x91/0xf0 [ 33.564763] print_report+0xcc/0x620 [ 33.565269] ? __virt_addr_valid+0x102/0x340 [ 33.565821] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.566452] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.567093] kasan_report+0xbe/0xf0 [ 33.567583] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.568225] vma_interval_tree_remove+0xc75/0xec0 [ 33.568832] vma_prepare+0xc54/0x11a0 [ 33.569327] __split_vma+0x5af/0x950 [ 33.569802] ? __pfx___split_vma+0x10/0x10 [ 33.570359] ? find_held_lock+0x2c/0x110 [ 33.570895] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.571487] ? lock_is_held_type+0x9f/0x120 [ 33.572051] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.572659] ? mtree_range_walk+0x632/0x900 [ 33.573223] ? mas_walk+0x5c7/0x7c0 [ 33.573698] do_vmi_munmap+0x1f1/0x2b0 [ 33.574224] mmap_region+0x1f9/0x2660 [ 33.574706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.575256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.575986] ? __pfx_lock_acquire+0x10/0x10 [ 33.576515] ? __pfx_mmap_region+0x10/0x10 [ 33.577059] ? security_mmap_addr+0x7d/0xa0 [ 33.577585] ? get_unmapped_area+0x1f5/0x3f0 [ 33.578147] do_mmap+0x854/0xf00 [ 33.578586] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.579130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.579701] ksys_mmap_pgoff+0x3af/0x500 [ 33.580227] do_syscall_64+0x3f/0x90 [ 33.580706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.581367] RIP: 0033:0x7f8534f7ad82 [ 33.581828] 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 [ 33.584028] RSP: 002b:00007ffe2c853518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.584943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8534f7ad82 [ 33.585796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85343b4000 [ 33.586657] RBP: 00007f85343b4000 R08: 0000000000000009 R09: 0000000000001000 [ 33.587559] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e09415eb20 [ 33.588455] R13: 00007ffe2c853530 R14: 00007ffe2c853560 R15: 00007ffe2c8538c0 [ 33.589328] [ 33.589623] [ 33.589843] Allocated by task 213: [ 33.590279] kasan_save_stack+0x22/0x50 [ 33.590804] kasan_set_track+0x25/0x30 [ 33.591328] __kasan_slab_alloc+0x59/0x70 [ 33.591858] kmem_cache_alloc+0x16b/0x370 [ 33.592398] vm_area_dup+0x20/0x160 [ 33.592862] __split_vma+0x170/0x950 [ 33.593342] split_vma+0xc6/0x110 [ 33.593783] mprotect_fixup+0x8d2/0xb30 [ 33.594295] do_mprotect_pkey+0x87e/0xd40 [ 33.594821] __x64_sys_mprotect+0x78/0xc0 [ 33.595385] do_syscall_64+0x3f/0x90 [ 33.595873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.596544] [ 33.596768] Freed by task 213: [ 33.597179] kasan_save_stack+0x22/0x50 [ 33.597686] kasan_set_track+0x25/0x30 [ 33.598195] kasan_save_free_info+0x2b/0x50 [ 33.598732] __kasan_slab_free+0x10a/0x190 [ 33.599320] kmem_cache_free+0x10d/0x4d0 [ 33.599839] rcu_core+0x8c8/0x2860 [ 33.600302] __do_softirq+0x1b7/0x7d4 [ 33.600798] [ 33.601040] Last potentially related work creation: [ 33.601625] kasan_save_stack+0x22/0x50 [ 33.602144] __kasan_record_aux_stack+0x8e/0xa0 [ 33.602705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.603386] remove_vma+0x139/0x170 [ 33.603844] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.604421] do_vmi_munmap+0x1f1/0x2b0 [ 33.604925] __vm_munmap+0x138/0x3a0 [ 33.605399] __x64_sys_munmap+0x59/0x80 [ 33.605926] do_syscall_64+0x3f/0x90 [ 33.606411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.607095] [ 33.607315] Second to last potentially related work creation: [ 33.608014] kasan_save_stack+0x22/0x50 [ 33.608517] __kasan_record_aux_stack+0x8e/0xa0 [ 33.609113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.609766] remove_vma+0x139/0x170 [ 33.610242] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.610817] do_vmi_munmap+0x1f1/0x2b0 [ 33.611329] mmap_region+0x1f9/0x2660 [ 33.611814] do_mmap+0x854/0xf00 [ 33.612254] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.612742] ksys_mmap_pgoff+0x7d/0x500 [ 33.613245] do_syscall_64+0x3f/0x90 [ 33.613716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.614394] [ 33.614614] The buggy address belongs to the object at ffff88800d9b7bc8 [ 33.614614] which belongs to the cache vm_area_struct of size 168 [ 33.616150] The buggy address is located 88 bytes inside of [ 33.616150] freed 168-byte region [ffff88800d9b7bc8, ffff88800d9b7c70) [ 33.617568] [ 33.617795] The buggy address belongs to the physical page: [ 33.618490] page:0000000096591191 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9b7 [ 33.619619] memcg:ffff88800cf15101 [ 33.620065] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.620720] page_type: 0xffffffff() [ 33.621192] raw: 0100000000000200 ffff88800879fc80 ffffea00003dffc0 dead000000000002 [ 33.622142] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf15101 [ 33.623074] page dumped because: kasan: bad access detected [ 33.623751] [ 33.623978] Memory state around the buggy address: [ 33.624554] ffff88800d9b7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.625424] ffff88800d9b7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.626307] >ffff88800d9b7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.627219] ^ [ 33.627758] ffff88800d9b7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.628802] ffff88800d9b7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.629900] ================================================================== [ 33.631267] Disabling lock debugging due to kernel taint [ 35.584155] BUG: Bad rss-counter state mm:00000000dad906bf type:MM_FILEPAGES val:33 [ 35.585185] BUG: Bad rss-counter state mm:00000000dad906bf type:MM_ANONPAGES val:22 [ 36.128206] BUG: Bad rss-counter state mm:000000007570a31a type:MM_FILEPAGES val:33 [ 36.129242] BUG: Bad rss-counter state mm:000000007570a31a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3558' (ECDSA) to the list of known hosts. 2023/06/19 20:13:30 fuzzer started 2023/06/19 20:13:31 dialing manager at localhost:44161 2023/06/19 20:13:31 checking machine... 2023/06/19 20:13:31 checking revisions... [ 36.759799] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:13:31 testing simple program... [ 36.808487] cgroup: Unknown subsys name 'net' [ 36.864123] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:13:28 Registers: info registers vcpu 0 RAX=1ffff11001fae7db RBX=ffff88800fd73ea8 RCX=1ffff1100135056a RDX=dffffc0000000000 RSI=ffff8880192b2200 RDI=ffff88800fd73ed8 RBP=ffff888009a82b20 RSP=ffff88800fee7cd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880192b1cc0 R13=0000000000000000 R14=ffff88800c58eaf8 R15=ffff88800c58eab0 RIP=ffffffff818474fe RFL=00000046 [---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 00007f838af0d900 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=00007f838b4c2650 CR3=00000000168e0000 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=00007ffe576723f8 CR3=000000000d9f4000 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=2030333a33313a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a33313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000