[ 61.789605] BUG: Bad rss-counter state mm:000000000bea2d89 type:MM_FILEPAGES val:33 [ 61.791243] BUG: Bad rss-counter state mm:000000000bea2d89 type:MM_ANONPAGES val:22 [ 61.960390] ================================================================== [ 61.961317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.962265] Read of size 8 at addr ffff88800e01eb38 by task sshd/226 [ 61.963048] [ 61.963419] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.964285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.965257] Call Trace: [ 61.965581] [ 61.965864] dump_stack_lvl+0x91/0xf0 [ 61.966357] print_report+0xcc/0x620 [ 61.966852] ? __virt_addr_valid+0x102/0x340 [ 61.967401] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.968021] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.968638] kasan_report+0xbe/0xf0 [ 61.969115] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.969738] vma_interval_tree_remove+0xc75/0xec0 [ 61.970335] vma_prepare+0xc54/0x11a0 [ 61.970844] __split_vma+0x5af/0x950 [ 61.971318] ? __pfx___split_vma+0x10/0x10 [ 61.971858] ? find_held_lock+0x2c/0x110 [ 61.972382] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.972949] ? lock_is_held_type+0x9f/0x120 [ 61.973492] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.974100] ? mtree_range_walk+0x632/0x900 [ 61.974664] ? mas_walk+0x5c7/0x7c0 [ 61.975151] do_vmi_munmap+0x1f1/0x2b0 [ 61.975652] mmap_region+0x1f9/0x2660 [ 61.976140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.976652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.977370] ? __pfx_lock_acquire+0x10/0x10 [ 61.977927] ? __pfx_mmap_region+0x10/0x10 [ 61.978449] ? security_mmap_addr+0x7d/0xa0 [ 61.978993] ? get_unmapped_area+0x1f5/0x3f0 [ 61.979548] do_mmap+0x854/0xf00 [ 61.979991] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.980483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.981049] ksys_mmap_pgoff+0x3af/0x500 [ 61.981559] do_syscall_64+0x3f/0x90 [ 61.982040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.982700] RIP: 0033:0x7f8992179d82 [ 61.983177] 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 [ 61.985304] RSP: 002b:00007ffe774b8828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.986202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8992179d82 [ 61.987062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89915b3000 [ 61.987907] RBP: 00007f89915b3000 R08: 0000000000000009 R09: 0000000000001000 [ 61.988753] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b526e42ec0 [ 61.989600] R13: 00007ffe774b8840 R14: 00007ffe774b8870 R15: 00007ffe774b8bd0 [ 61.990460] [ 61.990755] [ 61.990992] Allocated by task 211: [ 61.991428] kasan_save_stack+0x22/0x50 [ 61.991936] kasan_set_track+0x25/0x30 [ 61.992437] __kasan_slab_alloc+0x59/0x70 [ 61.992970] kmem_cache_alloc+0x16b/0x370 [ 61.993491] vm_area_dup+0x20/0x160 [ 61.993947] __split_vma+0x170/0x950 [ 61.994421] split_vma+0xc6/0x110 [ 61.994878] mprotect_fixup+0x8d2/0xb30 [ 61.995385] do_mprotect_pkey+0x87e/0xd40 [ 61.995911] __x64_sys_mprotect+0x78/0xc0 [ 61.996442] do_syscall_64+0x3f/0x90 [ 61.996921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.997571] [ 61.997791] Freed by task 203: [ 61.998187] kasan_save_stack+0x22/0x50 [ 61.998703] kasan_set_track+0x25/0x30 [ 61.999206] kasan_save_free_info+0x2b/0x50 [ 61.999739] __kasan_slab_free+0x10a/0x190 [ 62.000282] kmem_cache_free+0x10d/0x4d0 [ 62.000794] rcu_core+0x8c8/0x2860 [ 62.001247] __do_softirq+0x1b7/0x7d4 [ 62.001728] [ 62.001943] Last potentially related work creation: [ 62.002478] kasan_save_stack+0x22/0x50 [ 62.002995] __kasan_record_aux_stack+0x8e/0xa0 [ 62.003572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.004292] remove_vma+0x139/0x170 [ 62.004741] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.005300] do_vmi_munmap+0x1f1/0x2b0 [ 62.005787] __vm_munmap+0x138/0x3a0 [ 62.006258] __x64_sys_munmap+0x59/0x80 [ 62.006751] do_syscall_64+0x3f/0x90 [ 62.007241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.007892] [ 62.008110] The buggy address belongs to the object at ffff88800e01eae0 [ 62.008110] which belongs to the cache vm_area_struct of size 168 [ 62.009601] The buggy address is located 88 bytes inside of [ 62.009601] freed 168-byte region [ffff88800e01eae0, ffff88800e01eb88) [ 62.011023] [ 62.011245] The buggy address belongs to the physical page: [ 62.011903] page:00000000c2b7748f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe01e [ 62.012990] memcg:ffff88801a0e0f01 [ 62.013415] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.014067] page_type: 0xffffffff() [ 62.014525] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 62.015452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0e0f01 [ 62.016352] page dumped because: kasan: bad access detected [ 62.017019] [ 62.017238] Memory state around the buggy address: [ 62.017816] ffff88800e01ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.018677] ffff88800e01ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 62.019539] >ffff88800e01eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.020385] ^ [ 62.020994] ffff88800e01eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 62.021851] ffff88800e01ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 62.022701] ================================================================== [ 62.023648] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 64.022122] BUG: Bad rss-counter state mm:000000006e824c23 type:MM_FILEPAGES val:33 [ 64.023800] BUG: Bad rss-counter state mm:000000006e824c23 type:MM_ANONPAGES val:22 [ 64.604847] BUG: Bad rss-counter state mm:0000000022a34762 type:MM_FILEPAGES val:33 [ 64.606007] BUG: Bad rss-counter state mm:0000000022a34762 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47451' (ECDSA) to the list of known hosts. 2023/06/21 08:36:40 fuzzer started 2023/06/21 08:36:40 dialing manager at localhost:36067 2023/06/21 08:36:40 checking machine... 2023/06/21 08:36:40 checking revisions... [ 65.287159] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:36:40 testing simple program... [ 65.331655] cgroup: Unknown subsys name 'net' [ 65.409236] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:36:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffff88801653f790 RDX=1ffff11002ca7ee9 RSI=ffffffff813ad720 RDI=ffff88801653f7b8 RBP=ffff88801653f788 RSP=ffff88801653f6e0 R8 =0000000000000001 R9 =ffff88801653f730 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801653f7b8 R13=0000000000000000 R14=ffff888018e7b680 R15=000000008011000f RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007f03c15c6900 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=00007f03c1b7b650 CR3=000000000ea7e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=1ffffffff0c13012 RDI=ffffffff85d92c20 RBP=ffff888015c476a0 RSP=ffff888015c47588 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888015c476a8 R13=ffff888015c47690 R14=ffff888015c47689 R15=ffff888015c47648 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 00007febeffdd900 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=00007febef4fb000 CR3=000000000ca74000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3552008f21c434f100000000000ae988 XMM05=b7b96666cdcad4080000000000132d50 XMM06=13e856d8d71426c800000000001317d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000