[ 25.280694] BUG: Bad rss-counter state mm:00000000d3778f6b type:MM_FILEPAGES val:33 [ 25.282287] BUG: Bad rss-counter state mm:00000000d3778f6b type:MM_ANONPAGES val:22 [ 25.383498] ================================================================== [ 25.384659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.385827] Read of size 8 at addr ffff88800e3ebb38 by task sshd/218 [ 25.386872] [ 25.387135] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.388159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.389370] Call Trace: [ 25.389734] [ 25.390019] dump_stack_lvl+0x91/0xf0 [ 25.390540] print_report+0xcc/0x620 [ 25.391023] ? __virt_addr_valid+0x102/0x340 [ 25.391575] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.392199] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.392843] kasan_report+0xbe/0xf0 [ 25.393314] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.393939] vma_interval_tree_remove+0xc75/0xec0 [ 25.394538] vma_prepare+0xc54/0x11a0 [ 25.395036] __split_vma+0x5af/0x950 [ 25.395513] ? __pfx___split_vma+0x10/0x10 [ 25.396044] ? find_held_lock+0x2c/0x110 [ 25.396595] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.397166] ? lock_is_held_type+0x9f/0x120 [ 25.397728] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.398328] ? mtree_range_walk+0x632/0x900 [ 25.398880] ? mas_walk+0x5c7/0x7c0 [ 25.399356] do_vmi_munmap+0x1f1/0x2b0 [ 25.399853] mmap_region+0x1f9/0x2660 [ 25.400339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.400894] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.401600] ? __pfx_lock_acquire+0x10/0x10 [ 25.402137] ? __pfx_mmap_region+0x10/0x10 [ 25.402664] ? security_mmap_addr+0x7d/0xa0 [ 25.403196] ? get_unmapped_area+0x1f5/0x3f0 [ 25.403762] do_mmap+0x854/0xf00 [ 25.404199] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.404719] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.405286] ksys_mmap_pgoff+0x3af/0x500 [ 25.405819] do_syscall_64+0x3f/0x90 [ 25.406310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.406975] RIP: 0033:0x7fdff302dd82 [ 25.407424] 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 [ 25.409583] RSP: 002b:00007ffedb486538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.410484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdff302dd82 [ 25.411374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdff2467000 [ 25.412247] RBP: 00007fdff2467000 R08: 0000000000000009 R09: 0000000000001000 [ 25.413152] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600ddbfeec0 [ 25.414011] R13: 00007ffedb486550 R14: 00007ffedb486580 R15: 00007ffedb4868e0 [ 25.414908] [ 25.415209] [ 25.415424] Allocated by task 210: [ 25.415865] kasan_save_stack+0x22/0x50 [ 25.416377] kasan_set_track+0x25/0x30 [ 25.416928] __kasan_slab_alloc+0x59/0x70 [ 25.417446] kmem_cache_alloc+0x16b/0x370 [ 25.417981] vm_area_dup+0x20/0x160 [ 25.418440] __split_vma+0x170/0x950 [ 25.418909] split_vma+0xc6/0x110 [ 25.419347] mprotect_fixup+0x8d2/0xb30 [ 25.419848] do_mprotect_pkey+0x87e/0xd40 [ 25.420368] __x64_sys_mprotect+0x78/0xc0 [ 25.420917] do_syscall_64+0x3f/0x90 [ 25.421399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.422052] [ 25.422271] Freed by task 210: [ 25.422675] kasan_save_stack+0x22/0x50 [ 25.423209] kasan_set_track+0x25/0x30 [ 25.423717] kasan_save_free_info+0x2b/0x50 [ 25.424266] __kasan_slab_free+0x10a/0x190 [ 25.424857] kmem_cache_free+0x10d/0x4d0 [ 25.425385] rcu_core+0x8c8/0x2860 [ 25.425849] __do_softirq+0x1b7/0x7d4 [ 25.426339] [ 25.426562] Last potentially related work creation: [ 25.427166] kasan_save_stack+0x22/0x50 [ 25.427679] __kasan_record_aux_stack+0x8e/0xa0 [ 25.428326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.429001] remove_vma+0x139/0x170 [ 25.429453] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.430011] do_vmi_munmap+0x1f1/0x2b0 [ 25.430502] __vm_munmap+0x138/0x3a0 [ 25.430977] __x64_sys_munmap+0x59/0x80 [ 25.431489] do_syscall_64+0x3f/0x90 [ 25.431970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.432670] [ 25.432895] Second to last potentially related work creation: [ 25.433613] kasan_save_stack+0x22/0x50 [ 25.434114] __kasan_record_aux_stack+0x8e/0xa0 [ 25.434695] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.435352] remove_vma+0x139/0x170 [ 25.435807] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.436357] do_vmi_munmap+0x1f1/0x2b0 [ 25.436881] mmap_region+0x1f9/0x2660 [ 25.437352] do_mmap+0x854/0xf00 [ 25.437779] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.438263] ksys_mmap_pgoff+0x3af/0x500 [ 25.438758] do_syscall_64+0x3f/0x90 [ 25.439223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.439873] [ 25.440084] The buggy address belongs to the object at ffff88800e3ebae0 [ 25.440084] which belongs to the cache vm_area_struct of size 168 [ 25.441563] The buggy address is located 88 bytes inside of [ 25.441563] freed 168-byte region [ffff88800e3ebae0, ffff88800e3ebb88) [ 25.442966] [ 25.443178] The buggy address belongs to the physical page: [ 25.443829] page:00000000f4e7bde9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3eb [ 25.444948] memcg:ffff88800dfc7e01 [ 25.445371] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.446072] page_type: 0xffffffff() [ 25.446524] raw: 0100000000000200 ffff88800879fc80 ffffea00004d9480 dead000000000003 [ 25.447439] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc7e01 [ 25.448347] page dumped because: kasan: bad access detected [ 25.449033] [ 25.449246] Memory state around the buggy address: [ 25.449826] ffff88800e3eba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.450678] ffff88800e3eba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 25.451526] >ffff88800e3ebb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.452379] ^ [ 25.453010] ffff88800e3ebb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 25.453866] ffff88800e3ebc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 25.454704] ================================================================== [ 25.455612] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.361619] BUG: Bad rss-counter state mm:000000006f8cabf5 type:MM_FILEPAGES val:33 [ 27.362806] BUG: Bad rss-counter state mm:000000006f8cabf5 type:MM_ANONPAGES val:22 [ 27.917764] BUG: Bad rss-counter state mm:00000000d1099295 type:MM_FILEPAGES val:33 [ 27.919032] BUG: Bad rss-counter state mm:00000000d1099295 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42286' (ECDSA) to the list of known hosts. 2023/06/19 21:14:15 fuzzer started 2023/06/19 21:14:15 dialing manager at localhost:44161 2023/06/19 21:14:15 checking machine... 2023/06/19 21:14:15 checking revisions... [ 28.582072] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:14:15 testing simple program... [ 28.636437] cgroup: Unknown subsys name 'net' [ 28.692853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:14:13 Registers: info registers vcpu 0 RAX=000055daad560b21 RBX=000055daad560b20 RCX=0000000000000020 RDX=0000000000000000 RSI=0000000000000023 RDI=000055daad560b20 RBP=0000000000000002 RSP=00007ffc9d0f4298 R8 =000055daad58c7ee R9 =00007f27c8aaabe0 R10=0000000000000100 R11=0000000000000246 R12=000055daad57df80 R13=00007ffc9d0f42a8 R14=00007f27c84d3b22 R15=00007f27c84f8710 RIP=00007f27c8a4b4f1 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 00007f27c84f8900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc9d0ee000 CR3=000000000eb14000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=626c69616d2065726568772079726f74 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6b6174205249445f4c49414d20000023 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=00007feef082b430 CR3=0000000013666000 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=3052ef5894b232b60d4741bb6002cbf0 XMM02=2c67c8bc2e329bc3000000000011d218 XMM03=fb795ef6d65770560000000000123c60 XMM04=97237d21ae15f5f600000000000ae988 XMM05=751b9502027dc0b90000000000134b58 XMM06=7997dc13f42436b00000000000133a60 XMM07=e042d86d42eb936e0000000000123f38 XMM08=ae8c6b3ad51fa01b000000000011d278 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000