[ 41.022296] BUG: Bad rss-counter state mm:000000000b6b8b53 type:MM_FILEPAGES val:33 [ 41.023046] BUG: Bad rss-counter state mm:000000000b6b8b53 type:MM_ANONPAGES val:22 [ 41.230327] ================================================================== [ 41.230952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.231593] Read of size 8 at addr ffff88800ed24ed8 by task sshd/222 [ 41.232152] [ 41.232330] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.232973] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.233601] Call Trace: [ 41.233815] [ 41.234008] dump_stack_lvl+0x91/0xf0 [ 41.234373] print_report+0xcc/0x620 [ 41.234906] ? __virt_addr_valid+0x102/0x340 [ 41.236045] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.237509] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.238644] kasan_report+0xbe/0xf0 [ 41.239509] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.240713] vma_interval_tree_remove+0xc75/0xec0 [ 41.241933] vma_prepare+0xc54/0x11a0 [ 41.242876] __split_vma+0x5af/0x950 [ 41.243761] ? __pfx___split_vma+0x10/0x10 [ 41.244894] ? find_held_lock+0x2c/0x110 [ 41.245914] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.246957] ? lock_is_held_type+0x9f/0x120 [ 41.247970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.249258] ? mtree_range_walk+0x632/0x900 [ 41.250277] ? mas_walk+0x5c7/0x7c0 [ 41.251115] do_vmi_munmap+0x1f1/0x2b0 [ 41.252001] mmap_region+0x1f9/0x2660 [ 41.252989] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.253959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.255259] ? __pfx_lock_acquire+0x10/0x10 [ 41.256199] ? __pfx_mmap_region+0x10/0x10 [ 41.257235] ? security_mmap_addr+0x7d/0xa0 [ 41.258184] ? get_unmapped_area+0x1f5/0x3f0 [ 41.259266] do_mmap+0x854/0xf00 [ 41.260073] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.260768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.261109] ksys_mmap_pgoff+0x3af/0x500 [ 41.261470] do_syscall_64+0x3f/0x90 [ 41.261798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.262252] RIP: 0033:0x7fe8aaf4bd82 [ 41.262562] 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 [ 41.264056] RSP: 002b:00007ffdfa3a4328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.264739] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8aaf4bd82 [ 41.265303] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8aa385000 [ 41.265889] RBP: 00007fe8aa385000 R08: 0000000000000009 R09: 0000000000001000 [ 41.266506] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb79c7cb20 [ 41.267076] R13: 00007ffdfa3a4340 R14: 00007ffdfa3a4370 R15: 00007ffdfa3a46d0 [ 41.267659] [ 41.267858] [ 41.268003] Allocated by task 213: [ 41.268297] kasan_save_stack+0x22/0x50 [ 41.272987] kasan_set_track+0x25/0x30 [ 41.273788] __kasan_slab_alloc+0x59/0x70 [ 41.274670] kmem_cache_alloc+0x16b/0x370 [ 41.275582] vm_area_dup+0x20/0x160 [ 41.276358] __split_vma+0x170/0x950 [ 41.277329] split_vma+0xc6/0x110 [ 41.278051] mprotect_fixup+0x8d2/0xb30 [ 41.278916] do_mprotect_pkey+0x87e/0xd40 [ 41.279840] __x64_sys_mprotect+0x78/0xc0 [ 41.280752] do_syscall_64+0x3f/0x90 [ 41.281546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.282802] [ 41.283159] Freed by task 213: [ 41.283970] kasan_save_stack+0x22/0x50 [ 41.284871] kasan_set_track+0x25/0x30 [ 41.285671] kasan_save_free_info+0x2b/0x50 [ 41.286562] __kasan_slab_free+0x10a/0x190 [ 41.287496] kmem_cache_free+0x10d/0x4d0 [ 41.301089] rcu_core+0x8c8/0x2860 [ 41.301936] __do_softirq+0x1b7/0x7d4 [ 41.302775] [ 41.303130] Last potentially related work creation: [ 41.304201] kasan_save_stack+0x22/0x50 [ 41.305388] __kasan_record_aux_stack+0x8e/0xa0 [ 41.306420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.307541] remove_vma+0x139/0x170 [ 41.308300] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.309827] do_vmi_munmap+0x1f1/0x2b0 [ 41.310723] __vm_munmap+0x138/0x3a0 [ 41.311613] __x64_sys_munmap+0x59/0x80 [ 41.312687] do_syscall_64+0x3f/0x90 [ 41.316908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.318089] [ 41.318451] Second to last potentially related work creation: [ 41.319739] kasan_save_stack+0x22/0x50 [ 41.320626] __kasan_record_aux_stack+0x8e/0xa0 [ 41.321661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.322848] remove_vma+0x139/0x170 [ 41.323700] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.324947] do_vmi_munmap+0x1f1/0x2b0 [ 41.325939] mmap_region+0x1f9/0x2660 [ 41.326812] do_mmap+0x854/0xf00 [ 41.327606] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.328468] ksys_mmap_pgoff+0x3af/0x500 [ 41.329543] do_syscall_64+0x3f/0x90 [ 41.330513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.331606] [ 41.331955] The buggy address belongs to the object at ffff88800ed24e80 [ 41.331955] which belongs to the cache vm_area_struct of size 168 [ 41.334709] The buggy address is located 88 bytes inside of [ 41.334709] freed 168-byte region [ffff88800ed24e80, ffff88800ed24f28) [ 41.337421] [ 41.337804] The buggy address belongs to the physical page: [ 41.339106] page:00000000a139f3a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed24 [ 41.341347] memcg:ffff88800e2db201 [ 41.342180] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.343661] page_type: 0xffffffff() [ 41.344509] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 41.346439] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2db201 [ 41.348088] page dumped because: kasan: bad access detected [ 41.349431] [ 41.349834] Memory state around the buggy address: [ 41.350985] ffff88800ed24d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.352760] ffff88800ed24e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.354391] >ffff88800ed24e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.355973] ^ [ 41.357392] ffff88800ed24f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.359102] ffff88800ed24f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.360926] ================================================================== [ 41.362820] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.387262] BUG: Bad rss-counter state mm:000000004ad3f9af type:MM_FILEPAGES val:33 [ 43.387950] BUG: Bad rss-counter state mm:000000004ad3f9af type:MM_ANONPAGES val:22 [ 44.646235] BUG: Bad rss-counter state mm:000000007893cb98 type:MM_FILEPAGES val:33 [ 44.646961] BUG: Bad rss-counter state mm:000000007893cb98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2986' (ECDSA) to the list of known hosts. 2023/06/20 09:58:39 fuzzer started 2023/06/20 09:58:39 dialing manager at localhost:44161 2023/06/20 09:58:39 checking machine... 2023/06/20 09:58:39 checking revisions... [ 45.497511] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:58:39 testing simple program... [ 45.539294] cgroup: Unknown subsys name 'net' [ 45.617195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:58:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888009c651c0 RSI=ffffffff81b336af RDI=ffff88800f417940 RBP=ffffea00007607c0 RSP=ffff88800f417258 R8 =0000000000000004 R9 =0000000000000007 R10=000000000000000f R11=0000000000000128 R12=ffff88800f417638 R13=0000000000000001 R14=ffff88800f417920 R15=0000000000000000 RIP=ffffffff81b336f8 RFL=00000216 [----AP-] 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=0000556563b01218 CR3=0000000005482000 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=00007fc381eda510000055eeddd22790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff81764f76 RDX=ffff888016d5b680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea00006d6200 RSP=ffff88800b9cf910 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006d6200 R13=ffff8880167f49f8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c01e1 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 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=00007f7d0d0d6328 CR3=0000000009790000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000