syzkaller login: [ 30.947052] BUG: Bad rss-counter state mm:000000001bbe83f4 type:MM_FILEPAGES val:33 [ 30.947870] BUG: Bad rss-counter state mm:000000001bbe83f4 type:MM_ANONPAGES val:22 [ 31.058421] ================================================================== [ 31.059084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.059711] Read of size 8 at addr ffff88800e2354e0 by task sshd/220 [ 31.060187] [ 31.060326] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.060889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.061608] Call Trace: [ 31.061843] [ 31.062036] dump_stack_lvl+0x91/0xf0 [ 31.062419] print_report+0xcc/0x620 [ 31.062927] ? __virt_addr_valid+0x102/0x340 [ 31.063293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.063704] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.064126] kasan_report+0xbe/0xf0 [ 31.064452] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.064893] vma_interval_tree_remove+0xc75/0xec0 [ 31.065395] vma_prepare+0xc54/0x11a0 [ 31.065714] __split_vma+0x5af/0x950 [ 31.066035] ? __pfx___split_vma+0x10/0x10 [ 31.066405] ? find_held_lock+0x2c/0x110 [ 31.066836] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.067248] ? lock_is_held_type+0x9f/0x120 [ 31.067648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.068086] ? mtree_range_walk+0x632/0x900 [ 31.068484] ? mas_walk+0x5c7/0x7c0 [ 31.068842] do_vmi_munmap+0x1f1/0x2b0 [ 31.069253] mmap_region+0x1f9/0x2660 [ 31.069603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.069962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.070472] ? __pfx_lock_acquire+0x10/0x10 [ 31.070876] ? __pfx_mmap_region+0x10/0x10 [ 31.071251] ? security_mmap_addr+0x7d/0xa0 [ 31.071624] ? get_unmapped_area+0x1f5/0x3f0 [ 31.072018] do_mmap+0x854/0xf00 [ 31.072331] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.072691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.073102] ksys_mmap_pgoff+0x3af/0x500 [ 31.073458] do_syscall_64+0x3f/0x90 [ 31.073816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074280] RIP: 0033:0x7ff401229d82 [ 31.074614] 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 [ 31.076150] RSP: 002b:00007fffd7b0b378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.076792] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff401229d82 [ 31.077429] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff400663000 [ 31.078032] RBP: 00007ff400663000 R08: 0000000000000009 R09: 0000000000001000 [ 31.078637] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c1fdacec0 [ 31.079248] R13: 00007fffd7b0b390 R14: 00007fffd7b0b3c0 R15: 00007fffd7b0b720 [ 31.079876] [ 31.080085] [ 31.080238] Allocated by task 213: [ 31.080541] kasan_save_stack+0x22/0x50 [ 31.080911] kasan_set_track+0x25/0x30 [ 31.081298] __kasan_slab_alloc+0x59/0x70 [ 31.081644] kmem_cache_alloc+0x16b/0x370 [ 31.082023] vm_area_dup+0x20/0x160 [ 31.082344] __split_vma+0x170/0x950 [ 31.082669] split_vma+0xc6/0x110 [ 31.082994] mprotect_fixup+0x8d2/0xb30 [ 31.083363] do_mprotect_pkey+0x87e/0xd40 [ 31.083732] __x64_sys_mprotect+0x78/0xc0 [ 31.084097] do_syscall_64+0x3f/0x90 [ 31.084457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084890] [ 31.085040] Freed by task 213: [ 31.085336] kasan_save_stack+0x22/0x50 [ 31.085675] kasan_set_track+0x25/0x30 [ 31.086024] kasan_save_free_info+0x2b/0x50 [ 31.086389] __kasan_slab_free+0x10a/0x190 [ 31.086760] kmem_cache_free+0x10d/0x4d0 [ 31.087115] rcu_core+0x8c8/0x2860 [ 31.087426] __do_softirq+0x1b7/0x7d4 [ 31.087758] [ 31.087913] Last potentially related work creation: [ 31.088311] kasan_save_stack+0x22/0x50 [ 31.088666] __kasan_record_aux_stack+0x8e/0xa0 [ 31.089117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.089565] remove_vma+0x139/0x170 [ 31.089899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.090287] do_vmi_munmap+0x1f1/0x2b0 [ 31.090640] __vm_munmap+0x138/0x3a0 [ 31.090975] __x64_sys_munmap+0x59/0x80 [ 31.091320] do_syscall_64+0x3f/0x90 [ 31.091660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.092098] [ 31.092250] Second to last potentially related work creation: [ 31.092729] kasan_save_stack+0x22/0x50 [ 31.093099] __kasan_record_aux_stack+0x8e/0xa0 [ 31.093494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.093946] remove_vma+0x139/0x170 [ 31.094258] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.094658] do_vmi_munmap+0x1f1/0x2b0 [ 31.094997] mmap_region+0x1f9/0x2660 [ 31.095327] do_mmap+0x854/0xf00 [ 31.095630] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.095975] ksys_mmap_pgoff+0x3af/0x500 [ 31.096334] do_syscall_64+0x3f/0x90 [ 31.096663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.097117] [ 31.097257] The buggy address belongs to the object at ffff88800e235488 [ 31.097257] which belongs to the cache vm_area_struct of size 168 [ 31.098199] The buggy address is located 88 bytes inside of [ 31.098199] freed 168-byte region [ffff88800e235488, ffff88800e235530) [ 31.099144] [ 31.099299] The buggy address belongs to the physical page: [ 31.099745] page:00000000c37efe70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe235 [ 31.100482] memcg:ffff88800e0a0f01 [ 31.100768] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.101301] page_type: 0xffffffff() [ 31.101634] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381b40 dead000000000003 [ 31.102297] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a0f01 [ 31.102941] page dumped because: kasan: bad access detected [ 31.103412] [ 31.103560] Memory state around the buggy address: [ 31.103993] ffff88800e235380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.104613] ffff88800e235400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.105262] >ffff88800e235480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.105886] ^ [ 31.106464] ffff88800e235500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.107068] ffff88800e235580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.107650] ================================================================== [ 31.108469] Disabling lock debugging due to kernel taint [ 32.568142] BUG: Bad rss-counter state mm:00000000d583e95e type:MM_FILEPAGES val:33 [ 32.568973] BUG: Bad rss-counter state mm:00000000d583e95e type:MM_ANONPAGES val:22 [ 32.931109] BUG: Bad rss-counter state mm:000000003e781f16 type:MM_FILEPAGES val:33 [ 32.931781] BUG: Bad rss-counter state mm:000000003e781f16 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53627' (ECDSA) to the list of known hosts. 2023/06/21 09:03:56 fuzzer started 2023/06/21 09:03:56 dialing manager at localhost:36067 2023/06/21 09:03:56 checking machine... 2023/06/21 09:03:56 checking revisions... [ 33.522947] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:03:56 testing simple program... [ 33.557710] cgroup: Unknown subsys name 'net' [ 33.589608] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:03:56 Registers: info registers vcpu 0 RAX=ffff88806ce36180 RBX=ffff88801995a850 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800844f780 RSP=ffff88806ce09e00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=ffffea0000665680 R14=ffffffff813782f8 R15=ffff88801995a8d0 RIP=ffffffff8181073a 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 0000000000000000 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=00007fcfef5a72a0 CR3=000000000ec46000 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=2036353a33303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a33303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888017d8d1c0 RSI=ffffffff8172cab5 RDI=ffff88806cf357c0 RBP=ffff88806cf357c0 RSP=ffff88801018f9a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88806cf357c0 R13=ffffffff8172cab5 R14=ffff888017d8d1c0 R15=0000000000000001 RIP=ffffffff812d867e RFL=00000282 [--S----] 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 00007f8ceebc5900 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=00007f8ceeb7e008 CR3=000000000e820000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000