[ 30.798684] BUG: Bad rss-counter state mm:000000001a0b376a type:MM_FILEPAGES val:33 [ 30.800215] BUG: Bad rss-counter state mm:000000001a0b376a type:MM_ANONPAGES val:22 [ 30.964136] ================================================================== [ 30.965052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.966002] Read of size 8 at addr ffff888016a7d968 by task sshd/220 [ 30.966783] [ 30.967003] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.967977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.968966] Call Trace: [ 30.969288] [ 30.969612] dump_stack_lvl+0x91/0xf0 [ 30.970107] print_report+0xcc/0x620 [ 30.970590] ? __virt_addr_valid+0x102/0x340 [ 30.971165] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.971787] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.972404] kasan_report+0xbe/0xf0 [ 30.972895] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.973526] vma_interval_tree_remove+0xc75/0xec0 [ 30.974133] vma_prepare+0xc54/0x11a0 [ 30.974609] __split_vma+0x5af/0x950 [ 30.975084] ? __pfx___split_vma+0x10/0x10 [ 30.975610] ? find_held_lock+0x2c/0x110 [ 30.976137] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.976702] ? lock_is_held_type+0x9f/0x120 [ 30.977238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.977878] ? mtree_range_walk+0x632/0x900 [ 30.978434] ? mas_walk+0x5c7/0x7c0 [ 30.978915] do_vmi_munmap+0x1f1/0x2b0 [ 30.979417] mmap_region+0x1f9/0x2660 [ 30.979910] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.980423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.981157] ? __pfx_lock_acquire+0x10/0x10 [ 30.981714] ? __pfx_mmap_region+0x10/0x10 [ 30.982245] ? security_mmap_addr+0x7d/0xa0 [ 30.982786] ? get_unmapped_area+0x1f5/0x3f0 [ 30.983338] do_mmap+0x854/0xf00 [ 30.983782] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.984280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.984854] ksys_mmap_pgoff+0x3af/0x500 [ 30.985367] do_syscall_64+0x3f/0x90 [ 30.985876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.986539] RIP: 0033:0x7f2de27c5d82 [ 30.987011] 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 [ 30.989163] RSP: 002b:00007ffe4987f428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.990078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2de27c5d82 [ 30.990933] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2de1bff000 [ 30.991783] RBP: 00007f2de1bff000 R08: 0000000000000009 R09: 0000000000001000 [ 30.992626] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f003dcf70 [ 30.993471] R13: 00007ffe4987f440 R14: 00007ffe4987f470 R15: 00007ffe4987f7d0 [ 30.994362] [ 30.994654] [ 30.994872] Allocated by task 213: [ 30.995308] kasan_save_stack+0x22/0x50 [ 30.995819] kasan_set_track+0x25/0x30 [ 30.996314] __kasan_slab_alloc+0x59/0x70 [ 30.996842] kmem_cache_alloc+0x16b/0x370 [ 30.997359] vm_area_dup+0x20/0x160 [ 30.997825] __split_vma+0x170/0x950 [ 30.998292] split_vma+0xc6/0x110 [ 30.998733] mprotect_fixup+0x8d2/0xb30 [ 30.999243] do_mprotect_pkey+0x87e/0xd40 [ 30.999767] __x64_sys_mprotect+0x78/0xc0 [ 31.000290] do_syscall_64+0x3f/0x90 [ 31.000769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.001414] [ 31.001643] Freed by task 213: [ 31.002050] kasan_save_stack+0x22/0x50 [ 31.002556] kasan_set_track+0x25/0x30 [ 31.003054] kasan_save_free_info+0x2b/0x50 [ 31.003583] __kasan_slab_free+0x10a/0x190 [ 31.004118] kmem_cache_free+0x10d/0x4d0 [ 31.004629] rcu_core+0x8c8/0x2860 [ 31.005079] __do_softirq+0x1b7/0x7d4 [ 31.005576] [ 31.005794] Last potentially related work creation: [ 31.006376] kasan_save_stack+0x22/0x50 [ 31.006897] __kasan_record_aux_stack+0x8e/0xa0 [ 31.007484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.008132] remove_vma+0x139/0x170 [ 31.008594] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.009158] do_vmi_munmap+0x1f1/0x2b0 [ 31.009652] __vm_munmap+0x138/0x3a0 [ 31.010122] __x64_sys_munmap+0x59/0x80 [ 31.010635] do_syscall_64+0x3f/0x90 [ 31.011122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.011786] [ 31.012005] The buggy address belongs to the object at ffff888016a7d910 [ 31.012005] which belongs to the cache vm_area_struct of size 168 [ 31.013477] The buggy address is located 88 bytes inside of [ 31.013477] freed 168-byte region [ffff888016a7d910, ffff888016a7d9b8) [ 31.014904] [ 31.015123] The buggy address belongs to the physical page: [ 31.015781] page:000000009865fcd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a7d [ 31.016884] memcg:ffff888016a7b101 [ 31.017313] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.017977] page_type: 0xffffffff() [ 31.018434] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.019373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a7b101 [ 31.020284] page dumped because: kasan: bad access detected [ 31.020950] [ 31.021173] Memory state around the buggy address: [ 31.021757] ffff888016a7d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.022603] ffff888016a7d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.023476] >ffff888016a7d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.024345] ^ [ 31.025127] ffff888016a7d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.026000] ffff888016a7da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.026849] ================================================================== [ 31.027833] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.886198] BUG: Bad rss-counter state mm:00000000bc261f95 type:MM_FILEPAGES val:33 [ 32.887172] BUG: Bad rss-counter state mm:00000000bc261f95 type:MM_ANONPAGES val:22 [ 33.337756] BUG: Bad rss-counter state mm:000000005e72618e type:MM_FILEPAGES val:33 [ 33.339157] BUG: Bad rss-counter state mm:000000005e72618e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63434' (ECDSA) to the list of known hosts. 2023/06/21 02:31:29 fuzzer started 2023/06/21 02:31:30 dialing manager at localhost:36067 2023/06/21 02:31:30 checking machine... 2023/06/21 02:31:30 checking revisions... [ 34.110949] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:31:30 testing simple program... [ 34.153753] cgroup: Unknown subsys name 'net' [ 34.192153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:31:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81ef1137 RDX=000000000000ef12 RSI=000000000000ef11 RDI=ffffffff86525638 RBP=ffff8880145e77f8 RSP=ffff8880145e7730 R8 =0000000000000000 R9 =ffff8880145e77e0 R10=0000000000038001 R11=0000000000038ddb R12=ffff8880145e7800 R13=ffff8880145e77e8 R14=ffff8880145e77e1 R15=ffff8880145e77a0 RIP=ffffffff811307e3 RFL=00000212 [----A--] 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 00007f469f2ca900 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=00007f9da7b0a650 CR3=000000000d826000 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=d3467a67b3a76d6200000000000ae988 XMM05=ca034c475b59497500000000001352a0 XMM06=4fda316b135da52b0000000000133d20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffcaade19c8 CR3=000000000ca8c000 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=2039323a31333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a31333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000