[ 33.748548] BUG: Bad rss-counter state mm:00000000597df6cc type:MM_FILEPAGES val:33 [ 33.750257] BUG: Bad rss-counter state mm:00000000597df6cc type:MM_ANONPAGES val:22 [ 33.916746] ================================================================== [ 33.917666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.918732] Read of size 8 at addr ffff88800eba0df0 by task sshd/220 [ 33.919496] [ 33.919717] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.920589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.921570] Call Trace: [ 33.921886] [ 33.922168] dump_stack_lvl+0x91/0xf0 [ 33.922688] print_report+0xcc/0x620 [ 33.923173] ? __virt_addr_valid+0x102/0x340 [ 33.923730] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.924349] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.924958] kasan_report+0xbe/0xf0 [ 33.925432] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.926055] vma_interval_tree_remove+0xc75/0xec0 [ 33.926667] vma_prepare+0xc54/0x11a0 [ 33.927146] __split_vma+0x5af/0x950 [ 33.927613] ? __pfx___split_vma+0x10/0x10 [ 33.928138] ? find_held_lock+0x2c/0x110 [ 33.928655] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.929212] ? lock_is_held_type+0x9f/0x120 [ 33.929741] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.930361] ? mtree_range_walk+0x632/0x900 [ 33.930908] ? mas_walk+0x5c7/0x7c0 [ 33.931379] do_vmi_munmap+0x1f1/0x2b0 [ 33.931872] mmap_region+0x1f9/0x2660 [ 33.932349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.932853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.933558] ? __pfx_lock_acquire+0x10/0x10 [ 33.934081] ? __pfx_mmap_region+0x10/0x10 [ 33.934634] ? security_mmap_addr+0x7d/0xa0 [ 33.935167] ? get_unmapped_area+0x1f5/0x3f0 [ 33.935716] do_mmap+0x854/0xf00 [ 33.936152] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.936648] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.937208] ksys_mmap_pgoff+0x3af/0x500 [ 33.937707] do_syscall_64+0x3f/0x90 [ 33.938195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.938842] RIP: 0033:0x7f5323a11d82 [ 33.939303] 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 [ 33.941424] RSP: 002b:00007ffe64fe20a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.942327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5323a11d82 [ 33.943163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5322e4b000 [ 33.943995] RBP: 00007f5322e4b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.944831] R10: 0000000000000812 R11: 0000000000000206 R12: 000056298ea52f70 [ 33.945678] R13: 00007ffe64fe20c0 R14: 00007ffe64fe20f0 R15: 00007ffe64fe2450 [ 33.946536] [ 33.946824] [ 33.947035] Allocated by task 213: [ 33.947466] kasan_save_stack+0x22/0x50 [ 33.947972] kasan_set_track+0x25/0x30 [ 33.948466] __kasan_slab_alloc+0x59/0x70 [ 33.948990] kmem_cache_alloc+0x16b/0x370 [ 33.949508] vm_area_dup+0x20/0x160 [ 33.949957] __split_vma+0x170/0x950 [ 33.950440] split_vma+0xc6/0x110 [ 33.950882] mprotect_fixup+0x8d2/0xb30 [ 33.951387] do_mprotect_pkey+0x87e/0xd40 [ 33.951899] __x64_sys_mprotect+0x78/0xc0 [ 33.952421] do_syscall_64+0x3f/0x90 [ 33.952889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.953532] [ 33.953751] Freed by task 213: [ 33.954147] kasan_save_stack+0x22/0x50 [ 33.954661] kasan_set_track+0x25/0x30 [ 33.955154] kasan_save_free_info+0x2b/0x50 [ 33.955686] __kasan_slab_free+0x10a/0x190 [ 33.956220] kmem_cache_free+0x10d/0x4d0 [ 33.956734] rcu_core+0x8c8/0x2860 [ 33.957183] __do_softirq+0x1b7/0x7d4 [ 33.957651] [ 33.957866] Last potentially related work creation: [ 33.958451] kasan_save_stack+0x22/0x50 [ 33.958949] __kasan_record_aux_stack+0x8e/0xa0 [ 33.959531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.960173] remove_vma+0x139/0x170 [ 33.960617] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.961172] do_vmi_munmap+0x1f1/0x2b0 [ 33.961653] __vm_munmap+0x138/0x3a0 [ 33.962118] __x64_sys_munmap+0x59/0x80 [ 33.962630] do_syscall_64+0x3f/0x90 [ 33.963098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.963750] [ 33.963967] The buggy address belongs to the object at ffff88800eba0d98 [ 33.963967] which belongs to the cache vm_area_struct of size 168 [ 33.965426] The buggy address is located 88 bytes inside of [ 33.965426] freed 168-byte region [ffff88800eba0d98, ffff88800eba0e40) [ 33.966844] [ 33.967056] The buggy address belongs to the physical page: [ 33.967707] page:000000004e06fb43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeba0 [ 33.968785] memcg:ffff88800e338a01 [ 33.969215] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.969861] page_type: 0xffffffff() [ 33.970325] raw: 0100000000000200 ffff88800879fc80 ffffea000039b140 dead000000000002 [ 33.971245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e338a01 [ 33.972145] page dumped because: kasan: bad access detected [ 33.972799] [ 33.973020] Memory state around the buggy address: [ 33.973596] ffff88800eba0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.974455] ffff88800eba0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.975304] >ffff88800eba0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.976151] ^ [ 33.976948] ffff88800eba0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.977804] ffff88800eba0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.978663] ================================================================== [ 33.979723] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.183579] BUG: Bad rss-counter state mm:0000000014565faa type:MM_FILEPAGES val:33 [ 36.184570] BUG: Bad rss-counter state mm:0000000014565faa type:MM_ANONPAGES val:22 [ 36.663422] BUG: Bad rss-counter state mm:000000005c8d698e type:MM_FILEPAGES val:33 [ 36.664668] BUG: Bad rss-counter state mm:000000005c8d698e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29157' (ECDSA) to the list of known hosts. 2023/06/19 13:21:31 fuzzer started 2023/06/19 13:21:31 dialing manager at localhost:44161 2023/06/19 13:21:31 checking machine... 2023/06/19 13:21:31 checking revisions... [ 37.381327] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:21:31 testing simple program... [ 37.428975] cgroup: Unknown subsys name 'net' [ 37.529146] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:21:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801bc6a130 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=00000000000000f0 RDI=ffff88801bc6a130 RBP=ffff88806ce09e58 RSP=ffff88806ce09e28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff88800844f780 R13=ffffea00006f1a80 R14=ffffffff813782a8 R15=ffff88801bc6a1b0 RIP=ffffffff812c92b0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1c8650b900 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=00007f1c859033e0 CR3=000000000d780000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e1244c6f787c727400000000000ae988 XMM05=94b388a94d239e0900000000001348d0 XMM06=4fda316b135da52b0000000000133080 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=0000000000000000 RCX=00007ffefa6f4458 RDX=0000000000000001 RSI=00007efcc7b817b4 RDI=000055983eb293f0 RBP=00007ffefa6f43d0 RSP=00007ffefa6f41d0 R8 =00007ffefa6f4454 R9 =00007efcc7b81860 R10=00007ffefa6f3344 R11=0000000000000202 R12=0000000000000000 R13=00007ffefa6f49c0 R14=000055983eb293f0 R15=00007ffefa6f4560 RIP=00007efcc7ae086a RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efcc7606900 00000000 00000000 GS =0000 0000000000000000 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=00007ffefa6f1000 CR3=000000000f1c6000 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=563412feff00545000000000000080fe 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