[ 30.972058] BUG: Bad rss-counter state mm:00000000aee7256a type:MM_FILEPAGES val:33 [ 30.973458] BUG: Bad rss-counter state mm:00000000aee7256a type:MM_ANONPAGES val:22 [ 31.122933] ================================================================== [ 31.123863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.124807] Read of size 8 at addr ffff88800cc58b38 by task sshd/218 [ 31.125590] [ 31.125810] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.126813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.127793] Call Trace: [ 31.128118] [ 31.128407] dump_stack_lvl+0x91/0xf0 [ 31.128940] print_report+0xcc/0x620 [ 31.129426] ? __virt_addr_valid+0x102/0x340 [ 31.130009] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.130636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.131255] kasan_report+0xbe/0xf0 [ 31.131737] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132369] vma_interval_tree_remove+0xc75/0xec0 [ 31.132984] vma_prepare+0xc54/0x11a0 [ 31.133475] __split_vma+0x5af/0x950 [ 31.133958] ? __pfx___split_vma+0x10/0x10 [ 31.134486] ? find_held_lock+0x2c/0x110 [ 31.135009] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.135581] ? lock_is_held_type+0x9f/0x120 [ 31.136126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.136727] ? mtree_range_walk+0x632/0x900 [ 31.137285] ? mas_walk+0x5c7/0x7c0 [ 31.137777] do_vmi_munmap+0x1f1/0x2b0 [ 31.138271] mmap_region+0x1f9/0x2660 [ 31.138753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.139266] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.139975] ? __pfx_lock_acquire+0x10/0x10 [ 31.140506] ? __pfx_mmap_region+0x10/0x10 [ 31.141043] ? security_mmap_addr+0x7d/0xa0 [ 31.141595] ? get_unmapped_area+0x1f5/0x3f0 [ 31.142155] do_mmap+0x854/0xf00 [ 31.142596] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.143096] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.143655] ksys_mmap_pgoff+0x3af/0x500 [ 31.144159] do_syscall_64+0x3f/0x90 [ 31.144636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145278] RIP: 0033:0x7fefbdbfdd82 [ 31.145743] 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 [ 31.147877] RSP: 002b:00007ffe766b6998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.148782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefbdbfdd82 [ 31.149657] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefbd037000 [ 31.150508] RBP: 00007fefbd037000 R08: 0000000000000009 R09: 0000000000001000 [ 31.151360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ab7dacb20 [ 31.152207] R13: 00007ffe766b69b0 R14: 00007ffe766b69e0 R15: 00007ffe766b6d40 [ 31.153077] [ 31.153375] [ 31.153610] Allocated by task 211: [ 31.154046] kasan_save_stack+0x22/0x50 [ 31.154552] kasan_set_track+0x25/0x30 [ 31.155046] __kasan_slab_alloc+0x59/0x70 [ 31.155571] kmem_cache_alloc+0x16b/0x370 [ 31.156099] vm_area_dup+0x20/0x160 [ 31.156561] __split_vma+0x170/0x950 [ 31.157032] split_vma+0xc6/0x110 [ 31.157481] mprotect_fixup+0x8d2/0xb30 [ 31.157986] do_mprotect_pkey+0x87e/0xd40 [ 31.158508] __x64_sys_mprotect+0x78/0xc0 [ 31.159036] do_syscall_64+0x3f/0x90 [ 31.159520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160168] [ 31.160382] Freed by task 202: [ 31.160771] kasan_save_stack+0x22/0x50 [ 31.161275] kasan_set_track+0x25/0x30 [ 31.161788] kasan_save_free_info+0x2b/0x50 [ 31.162316] __kasan_slab_free+0x10a/0x190 [ 31.162859] kmem_cache_free+0x10d/0x4d0 [ 31.163381] rcu_core+0x8c8/0x2860 [ 31.163835] __do_softirq+0x1b7/0x7d4 [ 31.164311] [ 31.164525] Last potentially related work creation: [ 31.165115] kasan_save_stack+0x22/0x50 [ 31.165625] __kasan_record_aux_stack+0x8e/0xa0 [ 31.166196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.166844] remove_vma+0x139/0x170 [ 31.167347] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.167903] do_vmi_munmap+0x1f1/0x2b0 [ 31.168388] __vm_munmap+0x138/0x3a0 [ 31.168853] __x64_sys_munmap+0x59/0x80 [ 31.169351] do_syscall_64+0x3f/0x90 [ 31.169863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170506] [ 31.170719] The buggy address belongs to the object at ffff88800cc58ae0 [ 31.170719] which belongs to the cache vm_area_struct of size 168 [ 31.172197] The buggy address is located 88 bytes inside of [ 31.172197] freed 168-byte region [ffff88800cc58ae0, ffff88800cc58b88) [ 31.173597] [ 31.173814] The buggy address belongs to the physical page: [ 31.174468] page:00000000946e4a26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc58 [ 31.175558] memcg:ffff88800e0e2f01 [ 31.175992] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.176703] page_type: 0xffffffff() [ 31.177157] raw: 0100000000000200 ffff8880087a0c80 ffffea000039e840 dead000000000005 [ 31.178092] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e2f01 [ 31.178993] page dumped because: kasan: bad access detected [ 31.179651] [ 31.179867] Memory state around the buggy address: [ 31.180445] ffff88800cc58a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.181295] ffff88800cc58a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.182186] >ffff88800cc58b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.183032] ^ [ 31.183656] ffff88800cc58b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.184515] ffff88800cc58c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.185383] ================================================================== [ 31.186447] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.335101] BUG: Bad rss-counter state mm:000000000eea1736 type:MM_FILEPAGES val:33 [ 33.335898] BUG: Bad rss-counter state mm:000000000eea1736 type:MM_ANONPAGES val:22 [ 33.801841] BUG: Bad rss-counter state mm:0000000018142815 type:MM_FILEPAGES val:33 [ 33.803638] BUG: Bad rss-counter state mm:0000000018142815 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20362' (ECDSA) to the list of known hosts. 2023/06/20 11:00:20 fuzzer started 2023/06/20 11:00:21 dialing manager at localhost:36067 2023/06/20 11:00:21 checking machine... 2023/06/20 11:00:21 checking revisions... [ 34.490846] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:00:21 testing simple program... [ 34.544075] cgroup: Unknown subsys name 'net' [ 34.604180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8363d304 RDX=00000000000263d3 RSI=00000000000263d3 RDI=ffffffff8658293c RBP=ffff8880147478d8 RSP=ffff888014747810 R8 =0000000000000000 R9 =ffff8880147478c0 R10=0000000000038001 R11=000000000009a984 R12=ffff8880147478e0 R13=ffff8880147478c8 R14=ffff8880147478c1 R15=ffff888014747880 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007fedc6183900 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=00007fedc6738650 CR3=000000000dd1a000 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=0000000080000101 RBX=0000000000000001 RCX=0000000080000101 RDX=dffffc0000000000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=0000000009da3670 RSP=ffff88806cf09d78 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000000 R12=0000000000000000 R13=ffff88807ffd8000 R14=ffffffff813782f8 R15=ffff888019e508a0 RIP=ffffffff814c0871 RFL=00000286 [--S--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=00007fb199e06210 CR3=0000000009cda000 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=4011fd2b8eea01aac44bf2036d333f84 XMM02=000000000011b140ec2efd57dc4c00df XMM03=0000000000121e9058b5be8def15ba13 XMM04=a38bb653f03ad14a00000000000ae988 XMM05=751b9502027dc0b90000000000131a40 XMM06=556fc6343226e9cf0000000000130c18 XMM07=e042d86d42eb936e0000000000122168 XMM08=58b5be8def15ba13000000000011b1a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000