syzkaller login: [ 30.510328] BUG: Bad rss-counter state mm:00000000ae348e65 type:MM_FILEPAGES val:33 [ 30.511574] BUG: Bad rss-counter state mm:00000000ae348e65 type:MM_ANONPAGES val:22 [ 30.605130] ================================================================== [ 30.606066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.607054] Read of size 8 at addr ffff88800e290310 by task sshd/220 [ 30.607842] [ 30.608194] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.609065] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.610042] Call Trace: [ 30.610410] <TASK> [ 30.610698] dump_stack_lvl+0x91/0xf0 [ 30.611188] print_report+0xcc/0x620 [ 30.611679] ? __virt_addr_valid+0x102/0x340 [ 30.612238] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612864] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.613488] kasan_report+0xbe/0xf0 [ 30.613967] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.614607] vma_interval_tree_remove+0xc75/0xec0 [ 30.615205] vma_prepare+0xc54/0x11a0 [ 30.615688] __split_vma+0x5af/0x950 [ 30.616159] ? __pfx___split_vma+0x10/0x10 [ 30.616700] ? find_held_lock+0x2c/0x110 [ 30.617226] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.617784] ? lock_is_held_type+0x9f/0x120 [ 30.618340] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.618946] ? mtree_range_walk+0x632/0x900 [ 30.619511] ? mas_walk+0x5c7/0x7c0 [ 30.619997] do_vmi_munmap+0x1f1/0x2b0 [ 30.620505] mmap_region+0x1f9/0x2660 [ 30.621007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.621522] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.622238] ? __pfx_lock_acquire+0x10/0x10 [ 30.622778] ? __pfx_mmap_region+0x10/0x10 [ 30.623305] ? security_mmap_addr+0x7d/0xa0 [ 30.623840] ? get_unmapped_area+0x1f5/0x3f0 [ 30.624386] do_mmap+0x854/0xf00 [ 30.624830] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.625327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.625893] ksys_mmap_pgoff+0x3af/0x500 [ 30.626424] do_syscall_64+0x3f/0x90 [ 30.626908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627553] RIP: 0033:0x7fb849e29d82 [ 30.628008] 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 [ 30.630132] RSP: 002b:00007ffcfd4ee4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.631038] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb849e29d82 [ 30.631880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb849263000 [ 30.632726] RBP: 00007fb849263000 R08: 0000000000000009 R09: 0000000000001000 [ 30.633570] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f86835f70 [ 30.634432] R13: 00007ffcfd4ee4e0 R14: 00007ffcfd4ee510 R15: 00007ffcfd4ee870 [ 30.635309] </TASK> [ 30.635609] [ 30.635831] Allocated by task 213: [ 30.636259] kasan_save_stack+0x22/0x50 [ 30.636763] kasan_set_track+0x25/0x30 [ 30.637260] __kasan_slab_alloc+0x59/0x70 [ 30.637787] kmem_cache_alloc+0x16b/0x370 [ 30.638322] vm_area_dup+0x20/0x160 [ 30.638781] __split_vma+0x170/0x950 [ 30.639256] split_vma+0xc6/0x110 [ 30.639705] mprotect_fixup+0x8d2/0xb30 [ 30.640208] do_mprotect_pkey+0x87e/0xd40 [ 30.640740] __x64_sys_mprotect+0x78/0xc0 [ 30.641263] do_syscall_64+0x3f/0x90 [ 30.641737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.642389] [ 30.642609] Freed by task 213: [ 30.643008] kasan_save_stack+0x22/0x50 [ 30.643511] kasan_set_track+0x25/0x30 [ 30.644002] kasan_save_free_info+0x2b/0x50 [ 30.644536] __kasan_slab_free+0x10a/0x190 [ 30.645073] kmem_cache_free+0x10d/0x4d0 [ 30.645586] rcu_core+0x8c8/0x2860 [ 30.646029] __do_softirq+0x1b7/0x7d4 [ 30.646532] [ 30.646751] Last potentially related work creation: [ 30.647339] kasan_save_stack+0x22/0x50 [ 30.647845] __kasan_record_aux_stack+0x8e/0xa0 [ 30.648415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.649058] remove_vma+0x139/0x170 [ 30.649513] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.650068] do_vmi_munmap+0x1f1/0x2b0 [ 30.650559] __vm_munmap+0x138/0x3a0 [ 30.651031] __x64_sys_munmap+0x59/0x80 [ 30.651536] do_syscall_64+0x3f/0x90 [ 30.652016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.652664] [ 30.652882] Second to last potentially related work creation: [ 30.653572] kasan_save_stack+0x22/0x50 [ 30.654073] __kasan_record_aux_stack+0x8e/0xa0 [ 30.654675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.655316] remove_vma+0x139/0x170 [ 30.655774] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.656341] do_vmi_munmap+0x1f1/0x2b0 [ 30.656831] mmap_region+0x1f9/0x2660 [ 30.657319] do_mmap+0x854/0xf00 [ 30.657756] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.658258] ksys_mmap_pgoff+0x3af/0x500 [ 30.658762] do_syscall_64+0x3f/0x90 [ 30.659235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.659883] [ 30.660100] The buggy address belongs to the object at ffff88800e2902b8 [ 30.660100] which belongs to the cache vm_area_struct of size 168 [ 30.661640] The buggy address is located 88 bytes inside of [ 30.661640] freed 168-byte region [ffff88800e2902b8, ffff88800e290360) [ 30.663062] [ 30.663279] The buggy address belongs to the physical page: [ 30.663933] page:000000001090a262 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe290 [ 30.665015] memcg:ffff88800ee2dc01 [ 30.665440] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.666180] page_type: 0xffffffff() [ 30.666634] raw: 0100000000000200 ffff8880087a0c80 ffffea00003860c0 dead000000000005 [ 30.667565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee2dc01 [ 30.668478] page dumped because: kasan: bad access detected [ 30.669140] [ 30.669357] Memory state around the buggy address: [ 30.669946] ffff88800e290200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.670817] ffff88800e290280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.671690] >ffff88800e290300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.672537] ^ [ 30.673004] ffff88800e290380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.673857] ffff88800e290400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.674714] ================================================================== [ 30.676031] Disabling lock debugging due to kernel taint [ 32.774146] BUG: Bad rss-counter state mm:0000000018df623b type:MM_FILEPAGES val:33 [ 32.775157] BUG: Bad rss-counter state mm:0000000018df623b type:MM_ANONPAGES val:22 [ 33.229881] BUG: Bad rss-counter state mm:00000000041fcc75 type:MM_FILEPAGES val:33 [ 33.230870] BUG: Bad rss-counter state mm:00000000041fcc75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61721' (ECDSA) to the list of known hosts. 2023/06/21 02:03:42 fuzzer started 2023/06/21 02:03:43 dialing manager at localhost:36067 2023/06/21 02:03:43 checking machine... 2023/06/21 02:03:43 checking revisions... [ 33.888204] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:03:43 testing simple program... [ 33.942960] cgroup: Unknown subsys name 'net' [ 33.993761] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:03:42 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801a05b680 RSI=ffffffff81ef102a RDI=ffff88800d791b80 RBP=dffffc0000000000 RSP=ffff8880167cfdb8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800d791b80 R13=ffff88800d791bd0 R14=000000000000c000 R15=ffff88801936c5c0 RIP=ffffffff814c086b 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 00007fcd8ddcb900 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=00007fcd8e382618 CR3=000000000db4c000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fe0135db4c0 CR3=000000000c8e0000 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=c1c5c6501575af8dc64f265298df46eb XMM02=ec2efd57dc4c00df000000000011a908 XMM03=0a828afbc7bbc28c000000000011a9d8 XMM04=3d6f531092af798d00000000000ae988 XMM05=19e9129bd510f2350000000000133440 XMM06=4fda316b135da52b00000000001332c8 XMM07=e042d86d42eb936e00000000001221d0 XMM08=0a828afbc7bbc28c000000000011a9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000