syzkaller login: [ 30.146187] BUG: Bad rss-counter state mm:0000000034615913 type:MM_FILEPAGES val:33 [ 30.147808] BUG: Bad rss-counter state mm:0000000034615913 type:MM_ANONPAGES val:22 [ 30.316110] ================================================================== [ 30.317216] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.318315] Read of size 8 at addr ffff88800ffabb38 by task sshd/220 [ 30.319367] [ 30.319596] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.320476] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.321463] Call Trace: [ 30.321784] [ 30.322066] dump_stack_lvl+0x91/0xf0 [ 30.322554] print_report+0xcc/0x620 [ 30.323049] ? __virt_addr_valid+0x102/0x340 [ 30.323606] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324239] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324855] kasan_report+0xbe/0xf0 [ 30.325340] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.325962] vma_interval_tree_remove+0xc75/0xec0 [ 30.326561] vma_prepare+0xc54/0x11a0 [ 30.327033] __split_vma+0x5af/0x950 [ 30.327501] ? __pfx___split_vma+0x10/0x10 [ 30.328029] ? find_held_lock+0x2c/0x110 [ 30.328571] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.329137] ? lock_is_held_type+0x9f/0x120 [ 30.329670] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.330268] ? mtree_range_walk+0x632/0x900 [ 30.330811] ? mas_walk+0x5c7/0x7c0 [ 30.331283] do_vmi_munmap+0x1f1/0x2b0 [ 30.331771] mmap_region+0x1f9/0x2660 [ 30.332255] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.332765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.333466] ? __pfx_lock_acquire+0x10/0x10 [ 30.333999] ? __pfx_mmap_region+0x10/0x10 [ 30.334522] ? security_mmap_addr+0x7d/0xa0 [ 30.335052] ? get_unmapped_area+0x1f5/0x3f0 [ 30.335596] do_mmap+0x854/0xf00 [ 30.336033] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.336562] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.337126] ksys_mmap_pgoff+0x3af/0x500 [ 30.337625] do_syscall_64+0x3f/0x90 [ 30.338100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.338735] RIP: 0033:0x7f88a67a0d82 [ 30.339189] 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 [ 30.341292] RSP: 002b:00007ffef472aa68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.342194] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88a67a0d82 [ 30.343034] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88a5bda000 [ 30.343871] RBP: 00007f88a5bda000 R08: 0000000000000009 R09: 0000000000001000 [ 30.344717] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4cd6f3ec0 [ 30.345564] R13: 00007ffef472aa80 R14: 00007ffef472aab0 R15: 00007ffef472ae10 [ 30.346422] [ 30.346715] [ 30.346933] Allocated by task 213: [ 30.347361] kasan_save_stack+0x22/0x50 [ 30.347858] kasan_set_track+0x25/0x30 [ 30.348375] __kasan_slab_alloc+0x59/0x70 [ 30.348894] kmem_cache_alloc+0x16b/0x370 [ 30.349409] vm_area_dup+0x20/0x160 [ 30.349860] __split_vma+0x170/0x950 [ 30.350327] split_vma+0xc6/0x110 [ 30.350758] mprotect_fixup+0x8d2/0xb30 [ 30.351258] do_mprotect_pkey+0x87e/0xd40 [ 30.351772] __x64_sys_mprotect+0x78/0xc0 [ 30.352313] do_syscall_64+0x3f/0x90 [ 30.352785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353426] [ 30.353639] Freed by task 213: [ 30.354036] kasan_save_stack+0x22/0x50 [ 30.354534] kasan_set_track+0x25/0x30 [ 30.355035] kasan_save_free_info+0x2b/0x50 [ 30.355566] __kasan_slab_free+0x10a/0x190 [ 30.356096] kmem_cache_free+0x10d/0x4d0 [ 30.356613] rcu_core+0x8c8/0x2860 [ 30.357066] __do_softirq+0x1b7/0x7d4 [ 30.357544] [ 30.357760] Last potentially related work creation: [ 30.358340] kasan_save_stack+0x22/0x50 [ 30.358843] __kasan_record_aux_stack+0x8e/0xa0 [ 30.359480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.360128] remove_vma+0x139/0x170 [ 30.360588] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.361144] do_vmi_munmap+0x1f1/0x2b0 [ 30.361632] __vm_munmap+0x138/0x3a0 [ 30.362093] __x64_sys_munmap+0x59/0x80 [ 30.362589] do_syscall_64+0x3f/0x90 [ 30.363058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.363696] [ 30.363914] The buggy address belongs to the object at ffff88800ffabae0 [ 30.363914] which belongs to the cache vm_area_struct of size 168 [ 30.365398] The buggy address is located 88 bytes inside of [ 30.365398] freed 168-byte region [ffff88800ffabae0, ffff88800ffabb88) [ 30.366791] [ 30.367005] The buggy address belongs to the physical page: [ 30.367656] page:000000009fab7f0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffab [ 30.368752] memcg:ffff88800d0e0001 [ 30.369175] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.369828] page_type: 0xffffffff() [ 30.370275] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.371192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0e0001 [ 30.372087] page dumped because: kasan: bad access detected [ 30.372750] [ 30.372964] Memory state around the buggy address: [ 30.373536] ffff88800ffaba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.374391] ffff88800ffaba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.375238] >ffff88800ffabb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.376083] ^ [ 30.376710] ffff88800ffabb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.377559] ffff88800ffabc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.378402] ================================================================== [ 30.379438] Disabling lock debugging due to kernel taint [ 32.402262] BUG: Bad rss-counter state mm:0000000045864da3 type:MM_FILEPAGES val:33 [ 32.403155] BUG: Bad rss-counter state mm:0000000045864da3 type:MM_ANONPAGES val:22 [ 32.990204] BUG: Bad rss-counter state mm:00000000e6d6bc2b type:MM_FILEPAGES val:33 [ 32.991364] BUG: Bad rss-counter state mm:00000000e6d6bc2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46952' (ECDSA) to the list of known hosts. 2023/06/19 22:36:03 fuzzer started 2023/06/19 22:36:04 dialing manager at localhost:44161 2023/06/19 22:36:04 checking machine... 2023/06/19 22:36:04 checking revisions... [ 33.618190] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:36:04 testing simple program... [ 33.668778] cgroup: Unknown subsys name 'net' [ 33.717408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:36:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880147e78d8 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff8880147e78c8 RDI=ffff88806ce09aa8 RBP=ffff8880147e0000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000238a1 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880147e78c8 R15=ffff88806ce09a98 RIP=ffffffff81131ca6 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 00007f1bf5265900 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=00007f1bf4785000 CR3=000000000d806000 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=5a7c33bf3c7e38c600000000000ae988 XMM05=fabe28cf02fe66170000000000134d80 XMM06=4fda316b135da52b0000000000133b70 XMM07=fb795ef6d657705600000000001240e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000f RCX=ffffffff8449f3bb RDX=ffff888016a4d1c0 RSI=00007fcd3dfbdfff RDI=00007fcd3dfbdfff RBP=ffff88800d0d3c08 RSP=ffff88801011fcc0 R8 =0000000000000007 R9 =0000000000000000 R10=00007fcd3dfbdfff R11=0000000000000000 R12=00007fcd3dfbdfff R13=000000000000000e R14=00007fcd3dfbdfff R15=00007fcd3dfbdfff RIP=ffffffff814c02f8 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcd3d426900 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=00007fcd3df7a044 CR3=000000000c5e2000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6b61414c0705652520322e322e182800 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000