syzkaller login: [ 28.843798] BUG: Bad rss-counter state mm:00000000ca5b6664 type:MM_FILEPAGES val:33 [ 28.845028] BUG: Bad rss-counter state mm:00000000ca5b6664 type:MM_ANONPAGES val:22 [ 28.879529] ================================================================== [ 28.880214] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.880942] Read of size 8 at addr ffff8880101813f8 by task sshd/220 [ 28.881524] [ 28.881689] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.882339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.883069] Call Trace: [ 28.883415] [ 28.883632] dump_stack_lvl+0x91/0xf0 [ 28.884005] print_report+0xcc/0x620 [ 28.884369] ? __virt_addr_valid+0x102/0x340 [ 28.884786] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885257] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885723] kasan_report+0xbe/0xf0 [ 28.886084] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886550] vma_interval_tree_remove+0xc75/0xec0 [ 28.887002] vma_prepare+0xc54/0x11a0 [ 28.887369] __split_vma+0x5af/0x950 [ 28.887726] ? __pfx___split_vma+0x10/0x10 [ 28.888123] ? find_held_lock+0x2c/0x110 [ 28.888518] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.888947] ? lock_is_held_type+0x9f/0x120 [ 28.889358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.889867] ? mtree_range_walk+0x632/0x900 [ 28.890311] ? mas_walk+0x5c7/0x7c0 [ 28.890694] do_vmi_munmap+0x1f1/0x2b0 [ 28.891100] mmap_region+0x1f9/0x2660 [ 28.891497] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.891899] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.892468] ? __pfx_lock_acquire+0x10/0x10 [ 28.892889] ? __pfx_mmap_region+0x10/0x10 [ 28.893326] ? security_mmap_addr+0x7d/0xa0 [ 28.893687] ? get_unmapped_area+0x1f5/0x3f0 [ 28.893995] do_mmap+0x854/0xf00 [ 28.894236] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.894511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.894825] ksys_mmap_pgoff+0x3af/0x500 [ 28.895104] do_syscall_64+0x3f/0x90 [ 28.895371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.895734] RIP: 0033:0x7fccfcb34d82 [ 28.895986] 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 [ 28.897168] RSP: 002b:00007ffd956832b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.897672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccfcb34d82 [ 28.898140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccfbf6e000 [ 28.898618] RBP: 00007fccfbf6e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.899135] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c62d1e6980 [ 28.899652] R13: 00007ffd956832d0 R14: 00007ffd95683300 R15: 00007ffd95683660 [ 28.900171] [ 28.900350] [ 28.900477] Allocated by task 212: [ 28.900729] kasan_save_stack+0x22/0x50 [ 28.901031] kasan_set_track+0x25/0x30 [ 28.901328] __kasan_slab_alloc+0x59/0x70 [ 28.901637] kmem_cache_alloc+0x16b/0x370 [ 28.901948] vm_area_dup+0x20/0x160 [ 28.902217] __split_vma+0x170/0x950 [ 28.902490] split_vma+0xc6/0x110 [ 28.902747] mprotect_fixup+0x8d2/0xb30 [ 28.903043] do_mprotect_pkey+0x87e/0xd40 [ 28.903351] __x64_sys_mprotect+0x78/0xc0 [ 28.903665] do_syscall_64+0x3f/0x90 [ 28.903941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.904317] [ 28.904449] Freed by task 212: [ 28.904686] kasan_save_stack+0x22/0x50 [ 28.904997] kasan_set_track+0x25/0x30 [ 28.905289] kasan_save_free_info+0x2b/0x50 [ 28.905608] __kasan_slab_free+0x10a/0x190 [ 28.905919] kmem_cache_free+0x10d/0x4d0 [ 28.906213] rcu_core+0x8c8/0x2860 [ 28.906477] __do_softirq+0x1b7/0x7d4 [ 28.906757] [ 28.906884] Last potentially related work creation: [ 28.907236] kasan_save_stack+0x22/0x50 [ 28.907532] __kasan_record_aux_stack+0x8e/0xa0 [ 28.907866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.908247] remove_vma+0x139/0x170 [ 28.908519] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.908851] do_vmi_munmap+0x1f1/0x2b0 [ 28.909144] __vm_munmap+0x138/0x3a0 [ 28.909422] __x64_sys_munmap+0x59/0x80 [ 28.909711] do_syscall_64+0x3f/0x90 [ 28.910000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.910379] [ 28.910504] Second to last potentially related work creation: [ 28.910925] kasan_save_stack+0x22/0x50 [ 28.911222] __kasan_record_aux_stack+0x8e/0xa0 [ 28.911570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.911952] remove_vma+0x139/0x170 [ 28.912222] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.912549] do_vmi_munmap+0x1f1/0x2b0 [ 28.912840] mmap_region+0x1f9/0x2660 [ 28.913124] do_mmap+0x854/0xf00 [ 28.913380] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.913670] ksys_mmap_pgoff+0x3af/0x500 [ 28.913967] do_syscall_64+0x3f/0x90 [ 28.914248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.914632] [ 28.914759] The buggy address belongs to the object at ffff8880101813a0 [ 28.914759] which belongs to the cache vm_area_struct of size 168 [ 28.915644] The buggy address is located 88 bytes inside of [ 28.915644] freed 168-byte region [ffff8880101813a0, ffff888010181448) [ 28.916480] [ 28.916604] The buggy address belongs to the physical page: [ 28.917015] page:00000000e6b45042 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10181 [ 28.917669] memcg:ffff888013aeaa01 [ 28.917919] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.918332] page_type: 0xffffffff() [ 28.918597] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.919137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013aeaa01 [ 28.919669] page dumped because: kasan: bad access detected [ 28.920065] [ 28.920195] Memory state around the buggy address: [ 28.920541] ffff888010181280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.921073] ffff888010181300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.921585] >ffff888010181380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.922091] ^ [ 28.922606] ffff888010181400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.923119] ffff888010181480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.923630] ================================================================== [ 28.924265] Disabling lock debugging due to kernel taint [ 31.639537] BUG: Bad rss-counter state mm:00000000ba70f2d1 type:MM_FILEPAGES val:33 [ 31.640316] BUG: Bad rss-counter state mm:00000000ba70f2d1 type:MM_ANONPAGES val:22 [ 32.038602] BUG: Bad rss-counter state mm:00000000b3b54f98 type:MM_FILEPAGES val:33 [ 32.039383] BUG: Bad rss-counter state mm:00000000b3b54f98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19537' (ECDSA) to the list of known hosts. 2023/06/21 07:07:01 fuzzer started 2023/06/21 07:07:01 dialing manager at localhost:36067 2023/06/21 07:07:01 checking machine... 2023/06/21 07:07:01 checking revisions... [ 32.701101] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:07:01 testing simple program... [ 32.745319] cgroup: Unknown subsys name 'net' [ 32.789158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:07:01 Registers: info registers vcpu 0 RAX=ffffffff815a5bbc RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf6e0 RBP=ffff88800d99fd28 RSP=ffff88800d99fc60 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000101 R11=0000000000000000 R12=0000000000000054 R13=ffff88800d99fd60 R14=0000000000000054 R15=ffffc9000064e1c0 RIP=ffffffff815a5bc0 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 00007fd607512900 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=00007fd60690ea10 CR3=000000000c7bc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=84ef020c5b6b81f800000000000ae988 XMM05=9e19bf010e90f00c0000000000134570 XMM06=19e9129bd510f2350000000000133428 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81809add RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003082f36 RSI=ffffffff81809add RDI=ffff888018417a20 RBP=ffff8880184179f0 RSP=ffff888018417950 R8 =0000000000000001 R9 =ffff888018417998 R10=0000000000038001 R11=0000000000020db7 R12=ffff888018417a20 R13=0000000000000000 R14=ffff888015d03680 R15=ffff888017414b80 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007febf11fc900 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=00007ffd4c747000 CR3=0000000015e32000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000