syzkaller login: [ 31.185536] BUG: Bad rss-counter state mm:0000000057ec1fdb type:MM_FILEPAGES val:33 [ 31.186942] BUG: Bad rss-counter state mm:0000000057ec1fdb type:MM_ANONPAGES val:22 [ 31.345128] ================================================================== [ 31.346249] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.347174] Read of size 8 at addr ffff888019cfd798 by task sshd/218 [ 31.348038] [ 31.348256] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.349116] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.350098] Call Trace: [ 31.350414] [ 31.350701] dump_stack_lvl+0x91/0xf0 [ 31.351227] print_report+0xcc/0x620 [ 31.351726] ? __virt_addr_valid+0x102/0x340 [ 31.352274] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352887] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353509] kasan_report+0xbe/0xf0 [ 31.353979] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354593] vma_interval_tree_remove+0xc75/0xec0 [ 31.355211] vma_prepare+0xc54/0x11a0 [ 31.355694] __split_vma+0x5af/0x950 [ 31.356166] ? __pfx___split_vma+0x10/0x10 [ 31.356691] ? find_held_lock+0x2c/0x110 [ 31.357213] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357795] ? lock_is_held_type+0x9f/0x120 [ 31.358325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.358939] ? mtree_range_walk+0x632/0x900 [ 31.359613] ? mas_walk+0x5c7/0x7c0 [ 31.360071] do_vmi_munmap+0x1f1/0x2b0 [ 31.360548] mmap_region+0x1f9/0x2660 [ 31.361015] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.361523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.362216] ? __pfx_lock_acquire+0x10/0x10 [ 31.362731] ? __pfx_mmap_region+0x10/0x10 [ 31.363245] ? security_mmap_addr+0x7d/0xa0 [ 31.363757] ? get_unmapped_area+0x1f5/0x3f0 [ 31.364290] do_mmap+0x854/0xf00 [ 31.364714] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.365201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.365768] ksys_mmap_pgoff+0x3af/0x500 [ 31.366259] do_syscall_64+0x3f/0x90 [ 31.366752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367404] RIP: 0033:0x7fa2f35b3d82 [ 31.367849] 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 [ 31.369909] RSP: 002b:00007ffca5838008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.370801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2f35b3d82 [ 31.371867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2f29ed000 [ 31.372724] RBP: 00007fa2f29ed000 R08: 0000000000000009 R09: 0000000000001000 [ 31.373592] R10: 0000000000000812 R11: 0000000000000206 R12: 000056090d760ec0 [ 31.374449] R13: 00007ffca5838020 R14: 00007ffca5838050 R15: 00007ffca58383b0 [ 31.375307] [ 31.375607] [ 31.375822] Allocated by task 211: [ 31.376275] kasan_save_stack+0x22/0x50 [ 31.376773] kasan_set_track+0x25/0x30 [ 31.377312] __kasan_slab_alloc+0x59/0x70 [ 31.377824] kmem_cache_alloc+0x16b/0x370 [ 31.378321] vm_area_dup+0x20/0x160 [ 31.378762] __split_vma+0x170/0x950 [ 31.379217] split_vma+0xc6/0x110 [ 31.379645] mprotect_fixup+0x8d2/0xb30 [ 31.380131] do_mprotect_pkey+0x87e/0xd40 [ 31.380633] __x64_sys_mprotect+0x78/0xc0 [ 31.381138] do_syscall_64+0x3f/0x90 [ 31.381604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382230] [ 31.382486] Freed by task 211: [ 31.382875] kasan_save_stack+0x22/0x50 [ 31.383371] kasan_set_track+0x25/0x30 [ 31.383854] kasan_save_free_info+0x2b/0x50 [ 31.384375] __kasan_slab_free+0x10a/0x190 [ 31.384892] kmem_cache_free+0x10d/0x4d0 [ 31.385405] rcu_core+0x8c8/0x2860 [ 31.385840] __do_softirq+0x1b7/0x7d4 [ 31.386301] [ 31.386514] Last potentially related work creation: [ 31.387082] kasan_save_stack+0x22/0x50 [ 31.387568] __kasan_record_aux_stack+0x8e/0xa0 [ 31.388124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.388744] remove_vma+0x139/0x170 [ 31.389191] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.389743] do_vmi_munmap+0x1f1/0x2b0 [ 31.390212] __vm_munmap+0x138/0x3a0 [ 31.390669] __x64_sys_munmap+0x59/0x80 [ 31.391158] do_syscall_64+0x3f/0x90 [ 31.391634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392296] [ 31.392514] The buggy address belongs to the object at ffff888019cfd740 [ 31.392514] which belongs to the cache vm_area_struct of size 168 [ 31.394015] The buggy address is located 88 bytes inside of [ 31.394015] freed 168-byte region [ffff888019cfd740, ffff888019cfd7e8) [ 31.395396] [ 31.395615] The buggy address belongs to the physical page: [ 31.396275] page:00000000348ec393 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cfd [ 31.397385] memcg:ffff88800da49901 [ 31.397811] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.398523] page_type: 0xffffffff() [ 31.398989] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.399889] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da49901 [ 31.400790] page dumped because: kasan: bad access detected [ 31.401463] [ 31.401679] Memory state around the buggy address: [ 31.402267] ffff888019cfd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.403124] ffff888019cfd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.403975] >ffff888019cfd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.404817] ^ [ 31.405310] ffff888019cfd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.406139] ffff888019cfd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.406966] ================================================================== [ 31.407918] Disabling lock debugging due to kernel taint [ 34.168142] BUG: Bad rss-counter state mm:0000000006949c6d type:MM_FILEPAGES val:33 [ 34.169355] BUG: Bad rss-counter state mm:0000000006949c6d type:MM_ANONPAGES val:22 [ 34.559101] BUG: Bad rss-counter state mm:00000000a4273837 type:MM_FILEPAGES val:33 [ 34.560140] BUG: Bad rss-counter state mm:00000000a4273837 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40866' (ECDSA) to the list of known hosts. 2023/06/20 05:56:09 fuzzer started 2023/06/20 05:56:10 dialing manager at localhost:44161 2023/06/20 05:56:10 checking machine... 2023/06/20 05:56:10 checking revisions... [ 35.292884] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:56:10 testing simple program... [ 35.341263] cgroup: Unknown subsys name 'net' [ 35.398235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:56:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81807eba RDX=0000000000000000 RSI=ffffffff86136d7c RDI=ffffffff85dfc4f4 RBP=ffffffff85dfc4f4 RSP=ffff8880145ff1d0 R8 =ffffffff86136d7c R9 =ffff8880145ff2c8 R10=0000000000038001 R11=0000000000020c48 R12=ffffffff85dfc4f4 R13=ffffffff85dfc4f4 R14=ffffffff85dfc4f4 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000256 [---ZAP-] 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 00007f467a06b900 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=00007f46794f9510 CR3=000000000cbb0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=05935dcb88669a2800000000000ae988 XMM05=885d63e8e541b7230000000000135740 XMM06=bdf2e299e47b49d500000000001341c0 XMM07=fb795ef6d65770560000000000124ab0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000008 RSI=ffff8880167678f0 RDI=ffff8880167678f8 RBP=ffff888016767950 RSP=ffff888016767830 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888016767958 R13=ffff888016767940 R14=ffff8880167678f8 R15=ffff8880167678f8 RIP=ffffffff811303fa 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 00007f5275a42900 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=00007fff7b5cd000 CR3=000000000c59c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000