[ 62.131331] BUG: Bad rss-counter state mm:000000007e963942 type:MM_FILEPAGES val:33 [ 62.132508] BUG: Bad rss-counter state mm:000000007e963942 type:MM_ANONPAGES val:22 [ 62.294385] ================================================================== [ 62.295283] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.296226] Read of size 8 at addr ffff888016ad0310 by task sshd/226 [ 62.297026] [ 62.297247] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 62.298293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.299257] Call Trace: [ 62.299580] [ 62.299866] dump_stack_lvl+0x91/0xf0 [ 62.300359] print_report+0xcc/0x620 [ 62.300843] ? __virt_addr_valid+0x102/0x340 [ 62.301402] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.302052] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.302680] kasan_report+0xbe/0xf0 [ 62.303151] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.303779] vma_interval_tree_remove+0xc75/0xec0 [ 62.304381] vma_prepare+0xc54/0x11a0 [ 62.304855] __split_vma+0x5af/0x950 [ 62.305327] ? __pfx___split_vma+0x10/0x10 [ 62.305870] ? find_held_lock+0x2c/0x110 [ 62.306389] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.306955] ? lock_is_held_type+0x9f/0x120 [ 62.307496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.308101] ? mtree_range_walk+0x632/0x900 [ 62.308649] ? mas_walk+0x5c7/0x7c0 [ 62.309124] do_vmi_munmap+0x1f1/0x2b0 [ 62.309635] mmap_region+0x1f9/0x2660 [ 62.310117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.310632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.311344] ? __pfx_lock_acquire+0x10/0x10 [ 62.311887] ? __pfx_mmap_region+0x10/0x10 [ 62.312420] ? security_mmap_addr+0x7d/0xa0 [ 62.312956] ? get_unmapped_area+0x1f5/0x3f0 [ 62.313507] do_mmap+0x854/0xf00 [ 62.313970] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.314473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.315039] ksys_mmap_pgoff+0x3af/0x500 [ 62.315554] do_syscall_64+0x3f/0x90 [ 62.316050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.316715] RIP: 0033:0x7fab4a8ded82 [ 62.317182] 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 [ 62.319354] RSP: 002b:00007ffd64a1a718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.320276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab4a8ded82 [ 62.321127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab49d18000 [ 62.321982] RBP: 00007fab49d18000 R08: 0000000000000009 R09: 0000000000001000 [ 62.322826] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e200244ec0 [ 62.323675] R13: 00007ffd64a1a730 R14: 00007ffd64a1a760 R15: 00007ffd64a1aac0 [ 62.324526] [ 62.324819] [ 62.325035] Allocated by task 212: [ 62.325463] kasan_save_stack+0x22/0x50 [ 62.325986] kasan_set_track+0x25/0x30 [ 62.326476] __kasan_slab_alloc+0x59/0x70 [ 62.327000] kmem_cache_alloc+0x16b/0x370 [ 62.327518] vm_area_dup+0x20/0x160 [ 62.327974] __split_vma+0x170/0x950 [ 62.328439] split_vma+0xc6/0x110 [ 62.328890] mprotect_fixup+0x8d2/0xb30 [ 62.329393] do_mprotect_pkey+0x87e/0xd40 [ 62.329924] __x64_sys_mprotect+0x78/0xc0 [ 62.330445] do_syscall_64+0x3f/0x90 [ 62.330926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.331568] [ 62.331786] Freed by task 212: [ 62.332178] kasan_save_stack+0x22/0x50 [ 62.332678] kasan_set_track+0x25/0x30 [ 62.333169] kasan_save_free_info+0x2b/0x50 [ 62.333706] __kasan_slab_free+0x10a/0x190 [ 62.334242] kmem_cache_free+0x10d/0x4d0 [ 62.334749] rcu_core+0x8c8/0x2860 [ 62.335193] __do_softirq+0x1b7/0x7d4 [ 62.335674] [ 62.335892] Last potentially related work creation: [ 62.336482] kasan_save_stack+0x22/0x50 [ 62.336982] __kasan_record_aux_stack+0x8e/0xa0 [ 62.337569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.338211] remove_vma+0x139/0x170 [ 62.338663] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.339222] do_vmi_munmap+0x1f1/0x2b0 [ 62.339777] __vm_munmap+0x138/0x3a0 [ 62.340246] __x64_sys_munmap+0x59/0x80 [ 62.340742] do_syscall_64+0x3f/0x90 [ 62.341213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.341866] [ 62.342084] The buggy address belongs to the object at ffff888016ad02b8 [ 62.342084] which belongs to the cache vm_area_struct of size 168 [ 62.343551] The buggy address is located 88 bytes inside of [ 62.343551] freed 168-byte region [ffff888016ad02b8, ffff888016ad0360) [ 62.344943] [ 62.345162] The buggy address belongs to the physical page: [ 62.345836] page:0000000048f98aba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ad0 [ 62.346930] memcg:ffff88800dc5b801 [ 62.347355] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.348024] page_type: 0xffffffff() [ 62.348479] raw: 0100000000000200 ffff8880087a0c80 ffffea0000327bc0 0000000000000002 [ 62.349393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc5b801 [ 62.350297] page dumped because: kasan: bad access detected [ 62.350959] [ 62.351177] Memory state around the buggy address: [ 62.351764] ffff888016ad0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.352620] ffff888016ad0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.353469] >ffff888016ad0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.354340] ^ [ 62.354805] ffff888016ad0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.355667] ffff888016ad0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 62.356518] ================================================================== [ 62.357513] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 64.378819] BUG: Bad rss-counter state mm:00000000a903924c type:MM_FILEPAGES val:33 [ 64.379557] BUG: Bad rss-counter state mm:00000000a903924c type:MM_ANONPAGES val:22 [ 64.882535] BUG: Bad rss-counter state mm:00000000108eda65 type:MM_FILEPAGES val:33 [ 64.883231] BUG: Bad rss-counter state mm:00000000108eda65 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12189' (ECDSA) to the list of known hosts. 2023/06/20 15:44:09 fuzzer started 2023/06/20 15:44:09 dialing manager at localhost:36067 2023/06/20 15:44:09 checking machine... 2023/06/20 15:44:09 checking revisions... [ 65.472514] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:44:09 testing simple program... [ 65.516493] cgroup: Unknown subsys name 'net' [ 65.553358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:44:09 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f3c0b80 RCX=1ffff11001e78262 RDX=1ffff11001e781b6 RSI=0000000000000004 RDI=ffff88800f3c1310 RBP=1ffff11001e80f76 RSP=ffff88800f407b38 R8 =0000000000000001 R9 =ffffed1001e80f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f3c0d98 R13=0000000000000001 R14=ffff88800f3c0000 R15=ffff88800f3c0b80 RIP=ffffffff8302be6d RFL=00000006 [-----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 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=00007f8dca76b0b0 CR3=0000000019f32000 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=0000000000000000 RBX=ffff88800dc9a130 RCX=00000000800d000c RDX=00000000000d000d RSI=ffff88800dc9a130 RDI=ffff88800844f780 RBP=ffff8880102c7c68 RSP=ffff8880102c7bd0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000372680 R11=00000000000d000c R12=ffffea0000372680 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff8180973f RFL=00000242 [---Z---] 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 00007f1bdd9f4900 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=00007f1bdce534a0 CR3=000000000f232000 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=de8b350911a28c4300000000000ae988 XMM05=d46c900bad83a0900000000000132b40 XMM06=13e856d8d71426c800000000001315c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000