syzkaller login: [ 30.563339] BUG: Bad rss-counter state mm:0000000050148228 type:MM_FILEPAGES val:33 [ 30.565575] BUG: Bad rss-counter state mm:0000000050148228 type:MM_ANONPAGES val:22 [ 30.751412] ================================================================== [ 30.752614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.753917] Read of size 8 at addr ffff88801694aed8 by task sshd/223 [ 30.754989] [ 30.755278] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.756483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.757847] Call Trace: [ 30.758293] [ 30.758681] dump_stack_lvl+0x91/0xf0 [ 30.759339] print_report+0xcc/0x620 [ 30.760066] ? __virt_addr_valid+0x102/0x340 [ 30.760759] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762311] kasan_report+0xbe/0xf0 [ 30.762922] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763737] vma_interval_tree_remove+0xc75/0xec0 [ 30.764484] vma_prepare+0xc54/0x11a0 [ 30.765091] __split_vma+0x5af/0x950 [ 30.765691] ? __pfx___split_vma+0x10/0x10 [ 30.766358] ? find_held_lock+0x2c/0x110 [ 30.767042] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.767777] ? lock_is_held_type+0x9f/0x120 [ 30.768452] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.769220] ? mtree_range_walk+0x632/0x900 [ 30.769922] ? mas_walk+0x5c7/0x7c0 [ 30.770505] do_vmi_munmap+0x1f1/0x2b0 [ 30.771133] mmap_region+0x1f9/0x2660 [ 30.771784] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.772425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.773338] ? __pfx_lock_acquire+0x10/0x10 [ 30.774027] ? __pfx_mmap_region+0x10/0x10 [ 30.774701] ? security_mmap_addr+0x7d/0xa0 [ 30.775367] ? get_unmapped_area+0x1f5/0x3f0 [ 30.776096] do_mmap+0x854/0xf00 [ 30.776558] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.777077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.777654] ksys_mmap_pgoff+0x3af/0x500 [ 30.778163] do_syscall_64+0x3f/0x90 [ 30.778666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779319] RIP: 0033:0x7f397aba7d82 [ 30.779805] 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 [ 30.781965] RSP: 002b:00007ffc1ba44c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.782882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f397aba7d82 [ 30.783768] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3979fe1000 [ 30.784618] RBP: 00007f3979fe1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.785477] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559fdc88ec0 [ 30.786340] R13: 00007ffc1ba44c80 R14: 00007ffc1ba44cb0 R15: 00007ffc1ba45010 [ 30.787227] [ 30.787531] [ 30.787766] Allocated by task 214: [ 30.788198] kasan_save_stack+0x22/0x50 [ 30.788711] kasan_set_track+0x25/0x30 [ 30.789203] __kasan_slab_alloc+0x59/0x70 [ 30.789735] kmem_cache_alloc+0x16b/0x370 [ 30.790251] vm_area_dup+0x20/0x160 [ 30.790718] __split_vma+0x170/0x950 [ 30.791183] split_vma+0xc6/0x110 [ 30.791662] mprotect_fixup+0x8d2/0xb30 [ 30.792175] do_mprotect_pkey+0x87e/0xd40 [ 30.792714] __x64_sys_mprotect+0x78/0xc0 [ 30.793239] do_syscall_64+0x3f/0x90 [ 30.793726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794379] [ 30.794593] Freed by task 19: [ 30.794986] kasan_save_stack+0x22/0x50 [ 30.795487] kasan_set_track+0x25/0x30 [ 30.796008] kasan_save_free_info+0x2b/0x50 [ 30.796541] __kasan_slab_free+0x10a/0x190 [ 30.797097] kmem_cache_free+0x10d/0x4d0 [ 30.797613] rcu_core+0x8c8/0x2860 [ 30.798071] __do_softirq+0x1b7/0x7d4 [ 30.798551] [ 30.798777] Last potentially related work creation: [ 30.799366] kasan_save_stack+0x22/0x50 [ 30.799900] __kasan_record_aux_stack+0x8e/0xa0 [ 30.800480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.801130] remove_vma+0x139/0x170 [ 30.801585] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.802165] do_vmi_munmap+0x1f1/0x2b0 [ 30.802664] __vm_munmap+0x138/0x3a0 [ 30.803131] __x64_sys_munmap+0x59/0x80 [ 30.803648] do_syscall_64+0x3f/0x90 [ 30.804129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804784] [ 30.805002] The buggy address belongs to the object at ffff88801694ae80 [ 30.805002] which belongs to the cache vm_area_struct of size 168 [ 30.806478] The buggy address is located 88 bytes inside of [ 30.806478] freed 168-byte region [ffff88801694ae80, ffff88801694af28) [ 30.807934] [ 30.808151] The buggy address belongs to the physical page: [ 30.808820] page:000000008dfa5185 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1694a [ 30.809919] memcg:ffff88800dd7be01 [ 30.810347] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.811001] page_type: 0xffffffff() [ 30.811449] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.812414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd7be01 [ 30.813337] page dumped because: kasan: bad access detected [ 30.814013] [ 30.814228] Memory state around the buggy address: [ 30.814820] ffff88801694ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.815693] ffff88801694ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.816538] >ffff88801694ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.817410] ^ [ 30.818152] ffff88801694af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.819012] ffff88801694af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.819894] ================================================================== [ 30.821251] Disabling lock debugging due to kernel taint [ 33.284288] BUG: Bad rss-counter state mm:0000000087fb2ff7 type:MM_FILEPAGES val:33 [ 33.285432] BUG: Bad rss-counter state mm:0000000087fb2ff7 type:MM_ANONPAGES val:22 [ 33.757789] BUG: Bad rss-counter state mm:000000006efb40a6 type:MM_FILEPAGES val:33 [ 33.758794] BUG: Bad rss-counter state mm:000000006efb40a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53327' (ECDSA) to the list of known hosts. 2023/06/20 16:42:08 fuzzer started 2023/06/20 16:42:08 dialing manager at localhost:36067 2023/06/20 16:42:08 checking machine... 2023/06/20 16:42:08 checking revisions... [ 34.487862] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:42:08 testing simple program... [ 34.532979] cgroup: Unknown subsys name 'net' [ 34.590548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:42:07 Registers: info registers vcpu 0 RAX=000000007fff0000 RBX=ffff88800c4b4000 RCX=ffffffff814d4669 RDX=000000007fff0000 RSI=0000000000000000 RDI=0000000000000004 RBP=000000007fff0000 RSP=ffff88801463fde0 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff88801463fe30 R15=000000007fff0000 RIP=ffffffff814c0860 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 00007f4a53461900 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=00007f4a52851c70 CR3=000000000cc12000 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=260400f1c5d59e7c00000000000ae988 XMM05=7308100cc2eddbc00000000000132bf8 XMM06=00c3ffa147b8d85700000000001319e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e81e000 RCX=ffffffff812e0135 RDX=ffffffff8386872d RSI=0000000000000004 RDI=ffff88800f0cfa88 RBP=ffff88800e81e0d8 RSP=ffff88800f0cfb00 R8 =0000000000000001 R9 =ffffed1001e19f51 R10=0000000000000003 R11=0000000000000000 R12=ffff88800e81e098 R13=0000000000000000 R14=ffff888008fe8000 R15=ffff88800e81e000 RIP=ffffffff83655294 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 00007fc53aec7900 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=00007ffdb3aba000 CR3=000000000db84000 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