[ 25.176339] BUG: Bad rss-counter state mm:000000005ce4897c type:MM_FILEPAGES val:33 [ 25.177458] BUG: Bad rss-counter state mm:000000005ce4897c type:MM_ANONPAGES val:22 [ 25.359651] ================================================================== [ 25.360626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.361743] Read of size 8 at addr ffff88800efb7310 by task sshd/218 [ 25.362553] [ 25.362784] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.363707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.364732] Call Trace: [ 25.365072] [ 25.365401] dump_stack_lvl+0x91/0xf0 [ 25.365924] print_report+0xcc/0x620 [ 25.366440] ? __virt_addr_valid+0x102/0x340 [ 25.367023] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.367678] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.368335] kasan_report+0xbe/0xf0 [ 25.368855] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.369548] vma_interval_tree_remove+0xc75/0xec0 [ 25.370210] vma_prepare+0xc54/0x11a0 [ 25.370733] __split_vma+0x5af/0x950 [ 25.371251] ? __pfx___split_vma+0x10/0x10 [ 25.371837] ? find_held_lock+0x2c/0x110 [ 25.372408] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.373038] ? lock_is_held_type+0x9f/0x120 [ 25.373636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.374304] ? mtree_range_walk+0x632/0x900 [ 25.374904] ? mas_walk+0x5c7/0x7c0 [ 25.375429] do_vmi_munmap+0x1f1/0x2b0 [ 25.375966] mmap_region+0x1f9/0x2660 [ 25.376503] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.377067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.377863] ? __pfx_lock_acquire+0x10/0x10 [ 25.378458] ? __pfx_mmap_region+0x10/0x10 [ 25.379042] ? security_mmap_addr+0x7d/0xa0 [ 25.379628] ? get_unmapped_area+0x1f5/0x3f0 [ 25.380232] do_mmap+0x854/0xf00 [ 25.380721] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.381272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.381895] ksys_mmap_pgoff+0x3af/0x500 [ 25.382459] do_syscall_64+0x3f/0x90 [ 25.382986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.383696] RIP: 0033:0x7fdb279f5d82 [ 25.384199] 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 [ 25.386549] RSP: 002b:00007ffe68b26828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.387552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb279f5d82 [ 25.388486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb26e2f000 [ 25.389448] RBP: 00007fdb26e2f000 R08: 0000000000000009 R09: 0000000000001000 [ 25.390380] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651e458aec0 [ 25.391310] R13: 00007ffe68b26840 R14: 00007ffe68b26870 R15: 00007ffe68b26bd0 [ 25.392253] [ 25.392575] [ 25.392811] Allocated by task 211: [ 25.393293] kasan_save_stack+0x22/0x50 [ 25.393856] kasan_set_track+0x25/0x30 [ 25.394400] __kasan_slab_alloc+0x59/0x70 [ 25.394980] kmem_cache_alloc+0x16b/0x370 [ 25.395551] vm_area_dup+0x20/0x160 [ 25.396051] __split_vma+0x170/0x950 [ 25.396566] split_vma+0xc6/0x110 [ 25.397047] mprotect_fixup+0x8d2/0xb30 [ 25.397618] do_mprotect_pkey+0x87e/0xd40 [ 25.398185] __x64_sys_mprotect+0x78/0xc0 [ 25.398756] do_syscall_64+0x3f/0x90 [ 25.399274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.399977] [ 25.400213] Freed by task 202: [ 25.400653] kasan_save_stack+0x22/0x50 [ 25.401206] kasan_set_track+0x25/0x30 [ 25.401761] kasan_save_free_info+0x2b/0x50 [ 25.402351] __kasan_slab_free+0x10a/0x190 [ 25.402937] kmem_cache_free+0x10d/0x4d0 [ 25.403501] rcu_core+0x8c8/0x2860 [ 25.403990] __do_softirq+0x1b7/0x7d4 [ 25.404519] [ 25.404759] Last potentially related work creation: [ 25.405425] kasan_save_stack+0x22/0x50 [ 25.405977] __kasan_record_aux_stack+0x8e/0xa0 [ 25.406612] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.407327] remove_vma+0x139/0x170 [ 25.407826] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.408435] do_vmi_munmap+0x1f1/0x2b0 [ 25.408974] __vm_munmap+0x138/0x3a0 [ 25.409498] __x64_sys_munmap+0x59/0x80 [ 25.410044] do_syscall_64+0x3f/0x90 [ 25.410568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.411272] [ 25.411507] Second to last potentially related work creation: [ 25.412261] kasan_save_stack+0x22/0x50 [ 25.412820] __kasan_record_aux_stack+0x8e/0xa0 [ 25.413466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.414171] remove_vma+0x139/0x170 [ 25.414669] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.415279] do_vmi_munmap+0x1f1/0x2b0 [ 25.415817] mmap_region+0x1f9/0x2660 [ 25.416342] do_mmap+0x854/0xf00 [ 25.416817] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.417377] ksys_mmap_pgoff+0x7d/0x500 [ 25.417917] do_syscall_64+0x3f/0x90 [ 25.418448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.419150] [ 25.419387] The buggy address belongs to the object at ffff88800efb72b8 [ 25.419387] which belongs to the cache vm_area_struct of size 168 [ 25.420988] The buggy address is located 88 bytes inside of [ 25.420988] freed 168-byte region [ffff88800efb72b8, ffff88800efb7360) [ 25.422545] [ 25.422779] The buggy address belongs to the physical page: [ 25.423509] page:000000003f64b0be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefb7 [ 25.424692] memcg:ffff88800e5cae01 [ 25.425163] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.425892] page_type: 0xffffffff() [ 25.426394] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 25.427399] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5cae01 [ 25.428400] page dumped because: kasan: bad access detected [ 25.429123] [ 25.429373] Memory state around the buggy address: [ 25.430012] ffff88800efb7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 25.430955] ffff88800efb7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.431903] >ffff88800efb7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.432834] ^ [ 25.433364] ffff88800efb7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.434309] ffff88800efb7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 25.435252] ================================================================== [ 25.436395] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.560678] BUG: Bad rss-counter state mm:000000009497e6a7 type:MM_FILEPAGES val:33 [ 27.561834] BUG: Bad rss-counter state mm:000000009497e6a7 type:MM_ANONPAGES val:22 [ 27.974368] BUG: Bad rss-counter state mm:000000001479fd7c type:MM_FILEPAGES val:33 [ 27.975386] BUG: Bad rss-counter state mm:000000001479fd7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9709' (ECDSA) to the list of known hosts. 2023/06/20 07:13:08 fuzzer started 2023/06/20 07:13:08 dialing manager at localhost:44161 2023/06/20 07:13:08 checking machine... 2023/06/20 07:13:08 checking revisions... [ 28.687427] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:13:09 testing simple program... [ 28.743696] cgroup: Unknown subsys name 'net' [ 28.792728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:13:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=000000001453ed00 RSP=ffff8880163c7b70 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6996 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=0000000000000000 R15=ffff88801817bdc0 RIP=ffffffff8114325d 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 00007fc70078a900 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=00007ffe469e9000 CR3=0000000016440000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fb0d0a88d50 CR3=00000000100b4000 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=fe57e43803769784fc4d8629c0b29a22 XMM02=000000000011c728eff9b2d0a8fce9cb XMM03=000000000011c7f82c67c8bc2e329bc3 XMM04=82e8d49521cc21ad00000000000ae988 XMM05=751b9502027dc0b900000000001344f8 XMM06=bdf2e299e47b49d50000000000134380 XMM07=e042d86d42eb936e00000000001238f8 XMM08=1e9ab4e09a935344000000000011c7f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000