syzkaller login: [ 33.695370] BUG: Bad rss-counter state mm:00000000853986ea type:MM_FILEPAGES val:33 [ 33.696553] BUG: Bad rss-counter state mm:00000000853986ea type:MM_ANONPAGES val:22 [ 33.735211] ================================================================== [ 33.736205] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.737271] Read of size 8 at addr ffff88800c75e968 by task sshd/220 [ 33.738047] [ 33.738265] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.739162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.740150] Call Trace: [ 33.740474] [ 33.740764] dump_stack_lvl+0x91/0xf0 [ 33.741253] print_report+0xcc/0x620 [ 33.741736] ? __virt_addr_valid+0x102/0x340 [ 33.742309] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.742927] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.743559] kasan_report+0xbe/0xf0 [ 33.744043] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.744685] vma_interval_tree_remove+0xc75/0xec0 [ 33.745286] vma_prepare+0xc54/0x11a0 [ 33.745771] __split_vma+0x5af/0x950 [ 33.746258] ? __pfx___split_vma+0x10/0x10 [ 33.746828] ? find_held_lock+0x2c/0x110 [ 33.747347] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.747932] ? lock_is_held_type+0x9f/0x120 [ 33.748474] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.749088] ? mtree_range_walk+0x632/0x900 [ 33.749635] ? mas_walk+0x5c7/0x7c0 [ 33.750131] do_vmi_munmap+0x1f1/0x2b0 [ 33.750632] mmap_region+0x1f9/0x2660 [ 33.751114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.751626] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.752373] ? __pfx_lock_acquire+0x10/0x10 [ 33.752908] ? __pfx_mmap_region+0x10/0x10 [ 33.753442] ? security_mmap_addr+0x7d/0xa0 [ 33.753971] ? get_unmapped_area+0x1f5/0x3f0 [ 33.754552] do_mmap+0x854/0xf00 [ 33.755002] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.755495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.756053] ksys_mmap_pgoff+0x3af/0x500 [ 33.756588] do_syscall_64+0x3f/0x90 [ 33.757065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.757704] RIP: 0033:0x7f5d03512d82 [ 33.758160] 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 [ 33.760307] RSP: 002b:00007fff60903f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.761232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d03512d82 [ 33.762109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d0294c000 [ 33.762997] RBP: 00007f5d0294c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.763852] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f9ce7ef70 [ 33.764702] R13: 00007fff60903f40 R14: 00007fff60903f70 R15: 00007fff609042d0 [ 33.765584] [ 33.765876] [ 33.766097] Allocated by task 213: [ 33.766522] kasan_save_stack+0x22/0x50 [ 33.767151] kasan_set_track+0x25/0x30 [ 33.767648] __kasan_slab_alloc+0x59/0x70 [ 33.768181] kmem_cache_alloc+0x16b/0x370 [ 33.768698] vm_area_dup+0x20/0x160 [ 33.769168] __split_vma+0x170/0x950 [ 33.769639] split_vma+0xc6/0x110 [ 33.770083] mprotect_fixup+0x8d2/0xb30 [ 33.770585] do_mprotect_pkey+0x87e/0xd40 [ 33.771120] __x64_sys_mprotect+0x78/0xc0 [ 33.771641] do_syscall_64+0x3f/0x90 [ 33.772121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.772784] [ 33.773000] Freed by task 213: [ 33.773391] kasan_save_stack+0x22/0x50 [ 33.773902] kasan_set_track+0x25/0x30 [ 33.774421] kasan_save_free_info+0x2b/0x50 [ 33.774968] __kasan_slab_free+0x10a/0x190 [ 33.775508] kmem_cache_free+0x10d/0x4d0 [ 33.776023] rcu_core+0x8c8/0x2860 [ 33.776484] __do_softirq+0x1b7/0x7d4 [ 33.776983] [ 33.777203] Last potentially related work creation: [ 33.777797] kasan_save_stack+0x22/0x50 [ 33.778306] __kasan_record_aux_stack+0x8e/0xa0 [ 33.778932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.779580] remove_vma+0x139/0x170 [ 33.780044] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.780624] do_vmi_munmap+0x1f1/0x2b0 [ 33.781121] __vm_munmap+0x138/0x3a0 [ 33.781595] __x64_sys_munmap+0x59/0x80 [ 33.782089] do_syscall_64+0x3f/0x90 [ 33.782701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.783348] [ 33.783561] Second to last potentially related work creation: [ 33.784249] kasan_save_stack+0x22/0x50 [ 33.784772] __kasan_record_aux_stack+0x8e/0xa0 [ 33.785352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.786023] remove_vma+0x139/0x170 [ 33.786481] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.787061] do_vmi_munmap+0x1f1/0x2b0 [ 33.787552] mmap_region+0x1f9/0x2660 [ 33.788057] do_mmap+0x854/0xf00 [ 33.788492] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.788989] ksys_mmap_pgoff+0x7d/0x500 [ 33.789508] do_syscall_64+0x3f/0x90 [ 33.789986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.790647] [ 33.790862] The buggy address belongs to the object at ffff88800c75e910 [ 33.790862] which belongs to the cache vm_area_struct of size 168 [ 33.792363] The buggy address is located 88 bytes inside of [ 33.792363] freed 168-byte region [ffff88800c75e910, ffff88800c75e9b8) [ 33.793819] [ 33.794036] The buggy address belongs to the physical page: [ 33.794745] page:00000000e45dd91e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc75e [ 33.795845] memcg:ffff88800ceb5701 [ 33.796306] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.796961] page_type: 0xffffffff() [ 33.797413] raw: 0100000000000200 ffff88800879fc80 ffffea00003642c0 dead00000000000a [ 33.798350] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ceb5701 [ 33.799274] page dumped because: kasan: bad access detected [ 33.799957] [ 33.800177] Memory state around the buggy address: [ 33.800761] ffff88800c75e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.801642] ffff88800c75e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.802528] >ffff88800c75e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.803445] ^ [ 33.804237] ffff88800c75e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.805124] ffff88800c75ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.805985] ================================================================== [ 33.807070] Disabling lock debugging due to kernel taint [ 35.762474] BUG: Bad rss-counter state mm:00000000e92bd1e5 type:MM_FILEPAGES val:33 [ 35.763784] BUG: Bad rss-counter state mm:00000000e92bd1e5 type:MM_ANONPAGES val:22 [ 36.338470] BUG: Bad rss-counter state mm:0000000026b74705 type:MM_FILEPAGES val:33 [ 36.339668] BUG: Bad rss-counter state mm:0000000026b74705 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37694' (ECDSA) to the list of known hosts. 2023/06/20 01:22:43 fuzzer started 2023/06/20 01:22:43 dialing manager at localhost:44161 2023/06/20 01:22:43 checking machine... 2023/06/20 01:22:43 checking revisions... [ 37.006371] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:22:43 testing simple program... [ 37.061965] cgroup: Unknown subsys name 'net' [ 37.101306] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:22:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe98aafea8 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=00007f79125725100000558e8f1fd790 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=0000000000000001 RCX=0000000000000001 RDX=1ffff11001b50f41 RSI=ffffffff8363de43 RDI=ffff88800da879a8 RBP=ffff88800da87a00 RSP=ffff88800da87938 R8 =0000000000000001 R9 =ffff88800da879e8 R10=0000000000038001 R11=000000000008a96b R12=ffff88800da87a08 R13=ffff88800da879f0 R14=ffff88801bc13680 R15=ffff88800da879a8 RIP=ffffffff81130682 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 00007fb1bebc5900 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=00007fb1bf17c618 CR3=000000000c4d4000 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