[ 23.934662] BUG: Bad rss-counter state mm:00000000a26590bf type:MM_FILEPAGES val:33 [ 23.936289] BUG: Bad rss-counter state mm:00000000a26590bf type:MM_ANONPAGES val:22 [ 24.066995] ================================================================== [ 24.067686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.068408] Read of size 8 at addr ffff88800c6ab6b0 by task sshd/219 [ 24.068990] [ 24.069156] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.069991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.070801] Call Trace: [ 24.071046] [ 24.071260] dump_stack_lvl+0x91/0xf0 [ 24.071630] print_report+0xcc/0x620 [ 24.071996] ? __virt_addr_valid+0x102/0x340 [ 24.072425] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.072887] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.073346] kasan_report+0xbe/0xf0 [ 24.073703] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.074176] vma_interval_tree_remove+0xc75/0xec0 [ 24.074633] vma_prepare+0xc54/0x11a0 [ 24.074994] __split_vma+0x5af/0x950 [ 24.075349] ? __pfx___split_vma+0x10/0x10 [ 24.075750] ? find_held_lock+0x2c/0x110 [ 24.076147] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.076573] ? lock_is_held_type+0x9f/0x120 [ 24.076979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.077445] ? mtree_range_walk+0x632/0x900 [ 24.077882] ? mas_walk+0x5c7/0x7c0 [ 24.078240] do_vmi_munmap+0x1f1/0x2b0 [ 24.078615] mmap_region+0x1f9/0x2660 [ 24.078965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.079338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.079855] ? __pfx_lock_acquire+0x10/0x10 [ 24.080242] ? __pfx_mmap_region+0x10/0x10 [ 24.080628] ? security_mmap_addr+0x7d/0xa0 [ 24.081017] ? get_unmapped_area+0x1f5/0x3f0 [ 24.081424] do_mmap+0x854/0xf00 [ 24.081745] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.082116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.082526] ksys_mmap_pgoff+0x3af/0x500 [ 24.082899] do_syscall_64+0x3f/0x90 [ 24.083248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.083746] RIP: 0033:0x7f512fb8dd82 [ 24.084086] 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 [ 24.085639] RSP: 002b:00007ffc731b49b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.086312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f512fb8dd82 [ 24.086944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f512efc7000 [ 24.087586] RBP: 00007f512efc7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.088215] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df9ed03d90 [ 24.088838] R13: 00007ffc731b49d0 R14: 00007ffc731b4a00 R15: 00007ffc731b4d60 [ 24.089472] [ 24.089690] [ 24.089867] Allocated by task 212: [ 24.090186] kasan_save_stack+0x22/0x50 [ 24.090570] kasan_set_track+0x25/0x30 [ 24.090939] __kasan_slab_alloc+0x59/0x70 [ 24.091336] kmem_cache_alloc+0x16b/0x370 [ 24.091726] vm_area_dup+0x20/0x160 [ 24.092071] __split_vma+0x170/0x950 [ 24.092422] split_vma+0xc6/0x110 [ 24.092747] mprotect_fixup+0x8d2/0xb30 [ 24.093120] do_mprotect_pkey+0x87e/0xd40 [ 24.093510] __x64_sys_mprotect+0x78/0xc0 [ 24.093906] do_syscall_64+0x3f/0x90 [ 24.094260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.094739] [ 24.094901] Freed by task 203: [ 24.095197] kasan_save_stack+0x22/0x50 [ 24.095579] kasan_set_track+0x25/0x30 [ 24.095948] kasan_save_free_info+0x2b/0x50 [ 24.096345] __kasan_slab_free+0x10a/0x190 [ 24.096745] kmem_cache_free+0x10d/0x4d0 [ 24.097131] rcu_core+0x8c8/0x2860 [ 24.097466] __do_softirq+0x1b7/0x7d4 [ 24.097830] [ 24.097987] Last potentially related work creation: [ 24.098425] kasan_save_stack+0x22/0x50 [ 24.098795] __kasan_record_aux_stack+0x8e/0xa0 [ 24.099219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.099699] remove_vma+0x139/0x170 [ 24.100034] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.100449] do_vmi_munmap+0x1f1/0x2b0 [ 24.100812] __vm_munmap+0x138/0x3a0 [ 24.101167] __x64_sys_munmap+0x59/0x80 [ 24.101536] do_syscall_64+0x3f/0x90 [ 24.101903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.102377] [ 24.102537] Second to last potentially related work creation: [ 24.103041] kasan_save_stack+0x22/0x50 [ 24.103417] __kasan_record_aux_stack+0x8e/0xa0 [ 24.103852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.104341] remove_vma+0x139/0x170 [ 24.104682] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.105101] do_vmi_munmap+0x1f1/0x2b0 [ 24.105470] mmap_region+0x1f9/0x2660 [ 24.105829] do_mmap+0x854/0xf00 [ 24.106146] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.106515] ksys_mmap_pgoff+0x3af/0x500 [ 24.106895] do_syscall_64+0x3f/0x90 [ 24.107252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.107736] [ 24.107898] The buggy address belongs to the object at ffff88800c6ab658 [ 24.107898] which belongs to the cache vm_area_struct of size 168 [ 24.109014] The buggy address is located 88 bytes inside of [ 24.109014] freed 168-byte region [ffff88800c6ab658, ffff88800c6ab700) [ 24.110084] [ 24.110244] The buggy address belongs to the physical page: [ 24.110747] page:0000000081dca95f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6ab [ 24.111645] memcg:ffff888009749d01 [ 24.111971] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.112500] page_type: 0xffffffff() [ 24.112841] raw: 0100000000000200 ffff8880087a0c80 ffffea0000318040 dead000000000005 [ 24.113536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009749d01 [ 24.114237] page dumped because: kasan: bad access detected [ 24.114741] [ 24.114905] Memory state around the buggy address: [ 24.115348] ffff88800c6ab580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.115998] ffff88800c6ab600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.116631] >ffff88800c6ab680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.117241] ^ [ 24.117667] ffff88800c6ab700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.118315] ffff88800c6ab780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.118960] ================================================================== [ 24.119717] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.063701] BUG: Bad rss-counter state mm:00000000315bb852 type:MM_FILEPAGES val:33 [ 26.064897] BUG: Bad rss-counter state mm:00000000315bb852 type:MM_ANONPAGES val:22 [ 26.426657] BUG: Bad rss-counter state mm:000000001bb87b92 type:MM_FILEPAGES val:33 [ 26.427606] BUG: Bad rss-counter state mm:000000001bb87b92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35721' (ECDSA) to the list of known hosts. 2023/06/20 10:57:29 fuzzer started 2023/06/20 10:57:29 dialing manager at localhost:36067 2023/06/20 10:57:29 checking machine... 2023/06/20 10:57:29 checking revisions... [ 27.122288] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:57:29 testing simple program... [ 27.173126] cgroup: Unknown subsys name 'net' [ 27.229703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:57:28 Registers: info registers vcpu 0 RAX=00000012572b3878 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000012 RSI=ffff88806ce28140 RDI=0000000000053c3b RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000efc6e R11=0000000000000001 R12=0000000000053c3b R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000016 [----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f19780db900 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=00007f19786930b0 CR3=00000000162f0000 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=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=00007ffcf8b70f78 CR3=0000000005482000 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=00007f0da0117510000055d611fc7790 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