syzkaller login: [ 39.116006] BUG: Bad rss-counter state mm:00000000b7577043 type:MM_FILEPAGES val:33 [ 39.117984] BUG: Bad rss-counter state mm:00000000b7577043 type:MM_ANONPAGES val:22 [ 39.297692] ================================================================== [ 39.298627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.299592] Read of size 8 at addr ffff88800c547968 by task sshd/226 [ 39.300398] [ 39.300740] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.301630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.302651] Call Trace: [ 39.302987] [ 39.303282] dump_stack_lvl+0x91/0xf0 [ 39.303799] print_report+0xcc/0x620 [ 39.304330] ? __virt_addr_valid+0x102/0x340 [ 39.304902] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.305536] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.306174] kasan_report+0xbe/0xf0 [ 39.306665] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.307312] vma_interval_tree_remove+0xc75/0xec0 [ 39.307964] vma_prepare+0xc54/0x11a0 [ 39.308469] __split_vma+0x5af/0x950 [ 39.308962] ? __pfx___split_vma+0x10/0x10 [ 39.309517] ? find_held_lock+0x2c/0x110 [ 39.310066] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.310659] ? lock_is_held_type+0x9f/0x120 [ 39.311233] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.311871] ? mtree_range_walk+0x632/0x900 [ 39.312474] ? mas_walk+0x5c7/0x7c0 [ 39.312973] do_vmi_munmap+0x1f1/0x2b0 [ 39.313491] mmap_region+0x1f9/0x2660 [ 39.314003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.314541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.315302] ? __pfx_lock_acquire+0x10/0x10 [ 39.315867] ? __pfx_mmap_region+0x10/0x10 [ 39.316455] ? security_mmap_addr+0x7d/0xa0 [ 39.317015] ? get_unmapped_area+0x1f5/0x3f0 [ 39.317598] do_mmap+0x854/0xf00 [ 39.318069] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.318594] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.319189] ksys_mmap_pgoff+0x3af/0x500 [ 39.319725] do_syscall_64+0x3f/0x90 [ 39.320240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.320914] RIP: 0033:0x7f5038297d82 [ 39.321391] 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 [ 39.323599] RSP: 002b:00007ffeffc3a8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.324552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5038297d82 [ 39.325440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50376d1000 [ 39.326327] RBP: 00007f50376d1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.327212] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd137bbb20 [ 39.328125] R13: 00007ffeffc3a8c0 R14: 00007ffeffc3a8f0 R15: 00007ffeffc3ac50 [ 39.329022] [ 39.329326] [ 39.329556] Allocated by task 219: [ 39.330007] kasan_save_stack+0x22/0x50 [ 39.330535] kasan_set_track+0x25/0x30 [ 39.331056] __kasan_slab_alloc+0x59/0x70 [ 39.331598] kmem_cache_alloc+0x16b/0x370 [ 39.332155] vm_area_dup+0x20/0x160 [ 39.332628] __split_vma+0x170/0x950 [ 39.333118] split_vma+0xc6/0x110 [ 39.333578] mprotect_fixup+0x8d2/0xb30 [ 39.334098] do_mprotect_pkey+0x87e/0xd40 [ 39.334636] __x64_sys_mprotect+0x78/0xc0 [ 39.335178] do_syscall_64+0x3f/0x90 [ 39.335672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.336353] [ 39.336573] Freed by task 219: [ 39.336978] kasan_save_stack+0x22/0x50 [ 39.337504] kasan_set_track+0x25/0x30 [ 39.338013] kasan_save_free_info+0x2b/0x50 [ 39.338554] __kasan_slab_free+0x10a/0x190 [ 39.339087] kmem_cache_free+0x10d/0x4d0 [ 39.339601] rcu_core+0x8c8/0x2860 [ 39.340054] __do_softirq+0x1b7/0x7d4 [ 39.340534] [ 39.340756] Last potentially related work creation: [ 39.341345] kasan_save_stack+0x22/0x50 [ 39.341856] __kasan_record_aux_stack+0x8e/0xa0 [ 39.342442] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.343090] remove_vma+0x139/0x170 [ 39.343542] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.344117] do_vmi_munmap+0x1f1/0x2b0 [ 39.344605] __vm_munmap+0x138/0x3a0 [ 39.345077] __x64_sys_munmap+0x59/0x80 [ 39.345570] do_syscall_64+0x3f/0x90 [ 39.346042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.346689] [ 39.346913] The buggy address belongs to the object at ffff88800c547910 [ 39.346913] which belongs to the cache vm_area_struct of size 168 [ 39.348413] The buggy address is located 88 bytes inside of [ 39.348413] freed 168-byte region [ffff88800c547910, ffff88800c5479b8) [ 39.349819] [ 39.350040] The buggy address belongs to the physical page: [ 39.350705] page:00000000143877ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc547 [ 39.351798] memcg:ffff8880145d4101 [ 39.352231] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.352873] page_type: 0xffffffff() [ 39.353326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.354256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145d4101 [ 39.355180] page dumped because: kasan: bad access detected [ 39.355849] [ 39.356087] Memory state around the buggy address: [ 39.356679] ffff88800c547800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.357543] ffff88800c547880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.358409] >ffff88800c547900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.359261] ^ [ 39.360068] ffff88800c547980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.360929] ffff88800c547a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.361786] ================================================================== [ 39.363228] Disabling lock debugging due to kernel taint [ 41.353485] BUG: Bad rss-counter state mm:00000000facdabba type:MM_FILEPAGES val:33 [ 41.354637] BUG: Bad rss-counter state mm:00000000facdabba type:MM_ANONPAGES val:22 [ 41.781288] BUG: Bad rss-counter state mm:00000000f8b77429 type:MM_FILEPAGES val:33 [ 41.782448] BUG: Bad rss-counter state mm:00000000f8b77429 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18565' (ECDSA) to the list of known hosts. 2023/06/21 04:38:35 fuzzer started 2023/06/21 04:38:36 dialing manager at localhost:36067 2023/06/21 04:38:36 checking machine... 2023/06/21 04:38:36 checking revisions... [ 42.557360] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:38:36 testing simple program... [ 42.594431] cgroup: Unknown subsys name 'net' [ 42.640555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:38:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffec9cfa908 CR3=0000000005482000 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=00007f65009ad51000005610160c9790 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800eccf490 RCX=0000000000000001 RDX=1ffff11001d99e93 RSI=ffff88800eccff58 RDI=ffff88800eccf498 RBP=ffff88800eccff58 RSP=ffff88800eccf3e8 R8 =ffffffff864bbb58 R9 =ffff88800eccf4d0 R10=0000000000038001 R11=00000000000b6a61 R12=00000000000000a8 R13=ffff88800eccf4d8 R14=ffff88800eccff58 R15=ffff88800eccf490 RIP=ffffffff81130445 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 00007f1825c39900 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=00007f18261f0618 CR3=000000000e1b2000 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=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