syzkaller login: [ 30.470345] BUG: Bad rss-counter state mm:000000005b589f8b type:MM_FILEPAGES val:33 [ 30.471408] BUG: Bad rss-counter state mm:000000005b589f8b type:MM_ANONPAGES val:22 [ 30.640693] ================================================================== [ 30.641804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.642901] Read of size 8 at addr ffff88800d91b4e0 by task sshd/220 [ 30.643960] [ 30.644244] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.645163] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.646150] Call Trace: [ 30.646469] [ 30.646757] dump_stack_lvl+0x91/0xf0 [ 30.647258] print_report+0xcc/0x620 [ 30.647734] ? __virt_addr_valid+0x102/0x340 [ 30.648292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.648912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.649528] kasan_report+0xbe/0xf0 [ 30.649999] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650611] vma_interval_tree_remove+0xc75/0xec0 [ 30.651210] vma_prepare+0xc54/0x11a0 [ 30.651685] __split_vma+0x5af/0x950 [ 30.652163] ? __pfx___split_vma+0x10/0x10 [ 30.652691] ? find_held_lock+0x2c/0x110 [ 30.653207] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.653767] ? lock_is_held_type+0x9f/0x120 [ 30.654300] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.654901] ? mtree_range_walk+0x632/0x900 [ 30.655449] ? mas_walk+0x5c7/0x7c0 [ 30.655915] do_vmi_munmap+0x1f1/0x2b0 [ 30.656428] mmap_region+0x1f9/0x2660 [ 30.656905] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.657414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.658122] ? __pfx_lock_acquire+0x10/0x10 [ 30.658652] ? __pfx_mmap_region+0x10/0x10 [ 30.659182] ? security_mmap_addr+0x7d/0xa0 [ 30.659711] ? get_unmapped_area+0x1f5/0x3f0 [ 30.660271] do_mmap+0x854/0xf00 [ 30.660703] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.661194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.661758] ksys_mmap_pgoff+0x3af/0x500 [ 30.662262] do_syscall_64+0x3f/0x90 [ 30.662738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.663372] RIP: 0033:0x7fc616105d82 [ 30.663828] 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 [ 30.665954] RSP: 002b:00007ffd2908a048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.666874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc616105d82 [ 30.667711] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc61553f000 [ 30.668578] RBP: 00007fc61553f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.669417] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df056aaec0 [ 30.670266] R13: 00007ffd2908a060 R14: 00007ffd2908a090 R15: 00007ffd2908a3f0 [ 30.671122] [ 30.671416] [ 30.671632] Allocated by task 213: [ 30.672057] kasan_save_stack+0x22/0x50 [ 30.672575] kasan_set_track+0x25/0x30 [ 30.673070] __kasan_slab_alloc+0x59/0x70 [ 30.673600] kmem_cache_alloc+0x16b/0x370 [ 30.674112] vm_area_dup+0x20/0x160 [ 30.674570] __split_vma+0x170/0x950 [ 30.675046] split_vma+0xc6/0x110 [ 30.675481] mprotect_fixup+0x8d2/0xb30 [ 30.675982] do_mprotect_pkey+0x87e/0xd40 [ 30.676509] __x64_sys_mprotect+0x78/0xc0 [ 30.677021] do_syscall_64+0x3f/0x90 [ 30.677493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678142] [ 30.678359] Freed by task 213: [ 30.678747] kasan_save_stack+0x22/0x50 [ 30.679247] kasan_set_track+0x25/0x30 [ 30.679733] kasan_save_free_info+0x2b/0x50 [ 30.680272] __kasan_slab_free+0x10a/0x190 [ 30.680808] kmem_cache_free+0x10d/0x4d0 [ 30.681316] rcu_core+0x8c8/0x2860 [ 30.681751] __do_softirq+0x1b7/0x7d4 [ 30.682220] [ 30.682435] Last potentially related work creation: [ 30.683022] kasan_save_stack+0x22/0x50 [ 30.683519] __kasan_record_aux_stack+0x8e/0xa0 [ 30.684097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.684798] remove_vma+0x139/0x170 [ 30.685251] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.685814] do_vmi_munmap+0x1f1/0x2b0 [ 30.686300] __vm_munmap+0x138/0x3a0 [ 30.686765] __x64_sys_munmap+0x59/0x80 [ 30.687257] do_syscall_64+0x3f/0x90 [ 30.687731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688383] [ 30.688595] Second to last potentially related work creation: [ 30.689279] kasan_save_stack+0x22/0x50 [ 30.689775] __kasan_record_aux_stack+0x8e/0xa0 [ 30.690476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.691156] remove_vma+0x139/0x170 [ 30.691602] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.692177] do_vmi_munmap+0x1f1/0x2b0 [ 30.692670] mmap_region+0x1f9/0x2660 [ 30.693139] do_mmap+0x854/0xf00 [ 30.693568] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.694064] ksys_mmap_pgoff+0x3af/0x500 [ 30.694559] do_syscall_64+0x3f/0x90 [ 30.695027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695664] [ 30.695875] The buggy address belongs to the object at ffff88800d91b488 [ 30.695875] which belongs to the cache vm_area_struct of size 168 [ 30.697325] The buggy address is located 88 bytes inside of [ 30.697325] freed 168-byte region [ffff88800d91b488, ffff88800d91b530) [ 30.698716] [ 30.698935] The buggy address belongs to the physical page: [ 30.699597] page:0000000040b34a0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd91b [ 30.700695] memcg:ffff88800dd6b301 [ 30.701122] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.701849] page_type: 0xffffffff() [ 30.702301] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7fc0 dead000000000003 [ 30.703219] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd6b301 [ 30.704121] page dumped because: kasan: bad access detected [ 30.704778] [ 30.704998] Memory state around the buggy address: [ 30.705581] ffff88800d91b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.706428] ffff88800d91b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.707275] >ffff88800d91b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.708121] ^ [ 30.708860] ffff88800d91b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.709706] ffff88800d91b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.710550] ================================================================== [ 30.711629] Disabling lock debugging due to kernel taint [ 32.864934] BUG: Bad rss-counter state mm:000000004ad3ffbe type:MM_FILEPAGES val:33 [ 32.865933] BUG: Bad rss-counter state mm:000000004ad3ffbe type:MM_ANONPAGES val:22 [ 33.339347] BUG: Bad rss-counter state mm:0000000094d3ac06 type:MM_FILEPAGES val:33 [ 33.340555] BUG: Bad rss-counter state mm:0000000094d3ac06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52293' (ECDSA) to the list of known hosts. 2023/06/20 22:11:17 fuzzer started 2023/06/20 22:11:17 dialing manager at localhost:36067 2023/06/20 22:11:17 checking machine... 2023/06/20 22:11:17 checking revisions... [ 34.076851] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:11:17 testing simple program... [ 34.121839] cgroup: Unknown subsys name 'net' [ 34.167083] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:17 Registers: info registers vcpu 0 RAX=000000007f6b7077 RBX=000000006d5579e1 RCX=ffff8880103df604 RDX=000000000000000e RSI=0000000000000019 RDI=00000000e357db61 RBP=0000000000000020 RSP=ffff8880103df570 R8 =00000000fff3106a R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000800 R14=ffff8880103df5f8 R15=000000000000000e RIP=ffffffff82270470 RFL=00000206 [-----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 00007f30ce253900 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=00007f6143dee650 CR3=000000000ca24000 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=3c8830a2161fc5938543825be9999ae7 XMM02=eff9b2d0a8fce9cb000000000011b338 XMM03=2c67c8bc2e329bc3000000000011b460 XMM04=0d35f4398b0e46a100000000000ae988 XMM05=e0f9bf76492c96f800000000001343c8 XMM06=19e9129bd510f2350000000000133260 XMM07=fb795ef6d65770560000000000121e60 XMM08=2c67c8bc2e329bc3000000000011b460 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=0000000000000001 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=00007ffca2877328 CR3=0000000005482000 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=00007f92f6cf6510000055bb8dc7a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000