[ 23.795087] BUG: Bad rss-counter state mm:00000000a01a0da3 type:MM_FILEPAGES val:33 [ 23.797013] BUG: Bad rss-counter state mm:00000000a01a0da3 type:MM_ANONPAGES val:22 [ 23.942750] ================================================================== [ 23.943610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.944486] Read of size 8 at addr ffff8880158a0ed8 by task sshd/218 [ 23.945201] [ 23.945603] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.946417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.947353] Call Trace: [ 23.947673] [ 23.947942] dump_stack_lvl+0x91/0xf0 [ 23.948404] print_report+0xcc/0x620 [ 23.948861] ? __virt_addr_valid+0x102/0x340 [ 23.949380] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.949960] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.950536] kasan_report+0xbe/0xf0 [ 23.950994] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.951585] vma_interval_tree_remove+0xc75/0xec0 [ 23.952158] vma_prepare+0xc54/0x11a0 [ 23.952612] __split_vma+0x5af/0x950 [ 23.953081] ? __pfx___split_vma+0x10/0x10 [ 23.953595] ? find_held_lock+0x2c/0x110 [ 23.954118] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.954675] ? lock_is_held_type+0x9f/0x120 [ 23.955238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.955847] ? mtree_range_walk+0x632/0x900 [ 23.956393] ? mas_walk+0x5c7/0x7c0 [ 23.956870] do_vmi_munmap+0x1f1/0x2b0 [ 23.957350] mmap_region+0x1f9/0x2660 [ 23.957825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.958327] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.959046] ? __pfx_lock_acquire+0x10/0x10 [ 23.959575] ? __pfx_mmap_region+0x10/0x10 [ 23.960102] ? security_mmap_addr+0x7d/0xa0 [ 23.960640] ? get_unmapped_area+0x1f5/0x3f0 [ 23.961169] do_mmap+0x854/0xf00 [ 23.961588] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.962062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.962597] ksys_mmap_pgoff+0x3af/0x500 [ 23.963080] do_syscall_64+0x3f/0x90 [ 23.963533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.964139] RIP: 0033:0x7fc97462bd82 [ 23.964567] 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 [ 23.966554] RSP: 002b:00007fffab1f18e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.967414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc97462bd82 [ 23.968212] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc973a65000 [ 23.969008] RBP: 00007fc973a65000 R08: 0000000000000009 R09: 0000000000001000 [ 23.969809] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ceeddeec0 [ 23.970653] R13: 00007fffab1f1900 R14: 00007fffab1f1930 R15: 00007fffab1f1c90 [ 23.971507] [ 23.971794] [ 23.972005] Allocated by task 211: [ 23.972419] kasan_save_stack+0x22/0x50 [ 23.972921] kasan_set_track+0x25/0x30 [ 23.973416] __kasan_slab_alloc+0x59/0x70 [ 23.973935] kmem_cache_alloc+0x16b/0x370 [ 23.974446] vm_area_dup+0x20/0x160 [ 23.974904] __split_vma+0x170/0x950 [ 23.975392] split_vma+0xc6/0x110 [ 23.975819] mprotect_fixup+0x8d2/0xb30 [ 23.976318] do_mprotect_pkey+0x87e/0xd40 [ 23.976837] __x64_sys_mprotect+0x78/0xc0 [ 23.977347] do_syscall_64+0x3f/0x90 [ 23.977815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.978455] [ 23.978666] Freed by task 211: [ 23.979061] kasan_save_stack+0x22/0x50 [ 23.979550] kasan_set_track+0x25/0x30 [ 23.980038] kasan_save_free_info+0x2b/0x50 [ 23.980573] __kasan_slab_free+0x10a/0x190 [ 23.981099] kmem_cache_free+0x10d/0x4d0 [ 23.981603] rcu_core+0x8c8/0x2860 [ 23.982044] __do_softirq+0x1b7/0x7d4 [ 23.982516] [ 23.982730] Last potentially related work creation: [ 23.983331] kasan_save_stack+0x22/0x50 [ 23.983834] __kasan_record_aux_stack+0x8e/0xa0 [ 23.984402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.985035] remove_vma+0x139/0x170 [ 23.985477] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.986025] do_vmi_munmap+0x1f1/0x2b0 [ 23.986598] __vm_munmap+0x138/0x3a0 [ 23.987075] __x64_sys_munmap+0x59/0x80 [ 23.987556] do_syscall_64+0x3f/0x90 [ 23.988017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.988648] [ 23.988863] The buggy address belongs to the object at ffff8880158a0e80 [ 23.988863] which belongs to the cache vm_area_struct of size 168 [ 23.990326] The buggy address is located 88 bytes inside of [ 23.990326] freed 168-byte region [ffff8880158a0e80, ffff8880158a0f28) [ 23.991728] [ 23.991941] The buggy address belongs to the physical page: [ 23.992598] page:000000006d68a1ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158a0 [ 23.993683] memcg:ffff888016723201 [ 23.994107] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.994746] page_type: 0xffffffff() [ 23.995226] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.996137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016723201 [ 23.997029] page dumped because: kasan: bad access detected [ 23.997676] [ 23.997886] Memory state around the buggy address: [ 23.998460] ffff8880158a0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.999310] ffff8880158a0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.000156] >ffff8880158a0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.000991] ^ [ 24.001706] ffff8880158a0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.002539] ffff8880158a0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.003396] ================================================================== [ 24.004321] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.520104] BUG: Bad rss-counter state mm:00000000c5c3f833 type:MM_FILEPAGES val:33 [ 26.521210] BUG: Bad rss-counter state mm:00000000c5c3f833 type:MM_ANONPAGES val:22 [ 27.001934] BUG: Bad rss-counter state mm:0000000047db7d60 type:MM_FILEPAGES val:33 [ 27.002658] BUG: Bad rss-counter state mm:0000000047db7d60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26231' (ECDSA) to the list of known hosts. 2023/06/21 01:11:01 fuzzer started 2023/06/21 01:11:02 dialing manager at localhost:36067 2023/06/21 01:11:02 checking machine... 2023/06/21 01:11:02 checking revisions... [ 27.713957] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:11:02 testing simple program... [ 27.750444] cgroup: Unknown subsys name 'net' [ 27.792455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:11:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9fa40 RCX=0000000000000001 RDX=1ffff110011b3f48 RSI=ffffffff8100455c RDI=ffff888008d9fa4c RBP=000000000000000a RSP=ffff888008d9f958 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800950b540 RIP=ffffffff813ad51f 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 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=00007f2c593a2650 CR3=000000000e53c000 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=dffffc0000000000 RBX=ffffffff8460144a RCX=0000000000000001 RDX=1ffff1100d9e1354 RSI=ffff888014757890 RDI=ffffffff8460144a RBP=ffffffff8460144a RSP=ffff88806cf099f8 R8 =0000000000000001 R9 =ffff88806cf09a88 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000001 R13=0000000000000000 R14=ffff888016bb3680 R15=ffff88800ed58400 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007fd89faab900 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=00007fd89eeb7340 CR3=000000000e9f4000 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=a365e98db8e0891d00000000000ae988 XMM05=e553315a0a97421d0000000000131ff8 XMM06=806171799158d9670000000000130a78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000