syzkaller login: [ 48.889768] BUG: Bad rss-counter state mm:00000000dd485546 type:MM_FILEPAGES val:33 [ 48.891112] BUG: Bad rss-counter state mm:00000000dd485546 type:MM_ANONPAGES val:22 [ 49.044115] ================================================================== [ 49.045026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.045954] Read of size 8 at addr ffff88801bc0da50 by task sshd/220 [ 49.046722] [ 49.046934] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.047887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.048872] Call Trace: [ 49.049196] <TASK> [ 49.049483] dump_stack_lvl+0x91/0xf0 [ 49.049987] print_report+0xcc/0x620 [ 49.050467] ? __virt_addr_valid+0x102/0x340 [ 49.051019] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.051634] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.052269] kasan_report+0xbe/0xf0 [ 49.052748] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.053369] vma_interval_tree_remove+0xc75/0xec0 [ 49.053976] vma_prepare+0xc54/0x11a0 [ 49.054458] __split_vma+0x5af/0x950 [ 49.054932] ? __pfx___split_vma+0x10/0x10 [ 49.055467] ? find_held_lock+0x2c/0x110 [ 49.056006] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.056576] ? lock_is_held_type+0x9f/0x120 [ 49.057121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.057734] ? mtree_range_walk+0x632/0x900 [ 49.058293] ? mas_walk+0x5c7/0x7c0 [ 49.058768] do_vmi_munmap+0x1f1/0x2b0 [ 49.059269] mmap_region+0x1f9/0x2660 [ 49.059756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.060279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.060995] ? __pfx_lock_acquire+0x10/0x10 [ 49.061541] ? __pfx_mmap_region+0x10/0x10 [ 49.062084] ? security_mmap_addr+0x7d/0xa0 [ 49.062625] ? get_unmapped_area+0x1f5/0x3f0 [ 49.063182] do_mmap+0x854/0xf00 [ 49.063631] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.064151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.064721] ksys_mmap_pgoff+0x3af/0x500 [ 49.065236] do_syscall_64+0x3f/0x90 [ 49.065718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.066373] RIP: 0033:0x7fcc6cebed82 [ 49.066839] 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 [ 49.068980] RSP: 002b:00007ffec9de70d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.069897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc6cebed82 [ 49.070752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc6c2f8000 [ 49.071599] RBP: 00007fcc6c2f8000 R08: 0000000000000009 R09: 0000000000001000 [ 49.072456] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e367333ec0 [ 49.073311] R13: 00007ffec9de70f0 R14: 00007ffec9de7120 R15: 00007ffec9de7480 [ 49.074173] </TASK> [ 49.074468] [ 49.074686] Allocated by task 213: [ 49.075111] kasan_save_stack+0x22/0x50 [ 49.075616] kasan_set_track+0x25/0x30 [ 49.076127] __kasan_slab_alloc+0x59/0x70 [ 49.076651] kmem_cache_alloc+0x16b/0x370 [ 49.077182] vm_area_dup+0x20/0x160 [ 49.077641] __split_vma+0x170/0x950 [ 49.078110] split_vma+0xc6/0x110 [ 49.078553] mprotect_fixup+0x8d2/0xb30 [ 49.079067] do_mprotect_pkey+0x87e/0xd40 [ 49.079594] __x64_sys_mprotect+0x78/0xc0 [ 49.080122] do_syscall_64+0x3f/0x90 [ 49.080593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.081243] [ 49.081462] Freed by task 213: [ 49.081851] kasan_save_stack+0x22/0x50 [ 49.082359] kasan_set_track+0x25/0x30 [ 49.082857] kasan_save_free_info+0x2b/0x50 [ 49.083399] __kasan_slab_free+0x10a/0x190 [ 49.083940] kmem_cache_free+0x10d/0x4d0 [ 49.084449] rcu_core+0x8c8/0x2860 [ 49.084898] __do_softirq+0x1b7/0x7d4 [ 49.085380] [ 49.085597] Last potentially related work creation: [ 49.086180] kasan_save_stack+0x22/0x50 [ 49.086684] __kasan_record_aux_stack+0x8e/0xa0 [ 49.087256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.087892] remove_vma+0x139/0x170 [ 49.088373] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.088934] do_vmi_munmap+0x1f1/0x2b0 [ 49.089418] __vm_munmap+0x138/0x3a0 [ 49.089892] __x64_sys_munmap+0x59/0x80 [ 49.090385] do_syscall_64+0x3f/0x90 [ 49.090855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.091500] [ 49.091711] The buggy address belongs to the object at ffff88801bc0d9f8 [ 49.091711] which belongs to the cache vm_area_struct of size 168 [ 49.093197] The buggy address is located 88 bytes inside of [ 49.093197] freed 168-byte region [ffff88801bc0d9f8, ffff88801bc0daa0) [ 49.094614] [ 49.094831] The buggy address belongs to the physical page: [ 49.095490] page:00000000f46c4402 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc0d [ 49.096594] memcg:ffff88800e912601 [ 49.097030] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.097679] page_type: 0xffffffff() [ 49.098142] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.099058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e912601 [ 49.099991] page dumped because: kasan: bad access detected [ 49.100656] [ 49.100875] Memory state around the buggy address: [ 49.101457] ffff88801bc0d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.102321] ffff88801bc0d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 49.103183] >ffff88801bc0da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.104039] ^ [ 49.104741] ffff88801bc0da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 49.105590] ffff88801bc0db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.106437] ================================================================== [ 49.107400] Disabling lock debugging due to kernel taint [ 51.065169] BUG: Bad rss-counter state mm:0000000004c3583d type:MM_FILEPAGES val:33 [ 51.066169] BUG: Bad rss-counter state mm:0000000004c3583d type:MM_ANONPAGES val:22 [ 51.470227] BUG: Bad rss-counter state mm:000000001c2de6af type:MM_FILEPAGES val:33 [ 51.471253] BUG: Bad rss-counter state mm:000000001c2de6af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28508' (ECDSA) to the list of known hosts. 2023/06/19 17:24:49 fuzzer started 2023/06/19 17:24:50 dialing manager at localhost:44161 2023/06/19 17:24:50 checking machine... 2023/06/19 17:24:50 checking revisions... [ 52.194086] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:24:50 testing simple program... [ 52.240276] cgroup: Unknown subsys name 'net' [ 52.300845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:24:32 Registers: info registers vcpu 0 RAX=ffff888019ec0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019ebff01 RSI=ffff888019ebff50 RDI=ffff888019ebf420 RBP=ffff888019ebff50 RSP=ffff888019ebf378 R8 =ffffffff864b024a R9 =ffff888019ebf450 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff888019eb8000 R14=ffff888019ebff58 R15=ffff888019ebf410 RIP=ffffffff811304ce RFL=00000292 [--S-A--] 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 00007f2dcdced900 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=00007f2dce2a4618 CR3=000000001a370000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613751f RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000000 RSI=1ffffffff0c26ea3 RDI=ffffffff85dfc9fc RBP=ffff888014797500 RSP=ffff888014797438 R8 =ffffffff86137508 R9 =ffff8880147974e8 R10=0000000000038001 R11=0000000000020d8a R12=ffff888014797508 R13=ffff8880147974f0 R14=ffff8880147974e9 R15=ffff8880147974a8 RIP=ffffffff81130a5b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4a00615900 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=00007f49ffa435a0 CR3=000000000db06000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1803bad2a280f1ae00000000000ae988 XMM05=568e8011c08265050000000000134e70 XMM06=4fda316b135da52b0000000000133c60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000