syzkaller login: [ 58.813149] BUG: Bad rss-counter state mm:0000000017b0f3eb type:MM_FILEPAGES val:33 [ 58.814431] BUG: Bad rss-counter state mm:0000000017b0f3eb type:MM_ANONPAGES val:22 [ 58.995079] ================================================================== [ 58.996158] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.997264] Read of size 8 at addr ffff888018c265c8 by task sshd/221 [ 58.998365] [ 58.998613] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 58.999683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.000728] Call Trace: [ 59.001046] [ 59.001330] dump_stack_lvl+0x91/0xf0 [ 59.001815] print_report+0xcc/0x620 [ 59.002292] ? __virt_addr_valid+0x102/0x340 [ 59.002858] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.003475] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.004095] kasan_report+0xbe/0xf0 [ 59.004581] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.005231] vma_interval_tree_remove+0xc75/0xec0 [ 59.005854] vma_prepare+0xc54/0x11a0 [ 59.006372] __split_vma+0x5af/0x950 [ 59.006870] ? __pfx___split_vma+0x10/0x10 [ 59.007419] ? find_held_lock+0x2c/0x110 [ 59.007965] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.008551] ? lock_is_held_type+0x9f/0x120 [ 59.009110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.009751] ? mtree_range_walk+0x632/0x900 [ 59.010340] ? mas_walk+0x5c7/0x7c0 [ 59.010837] do_vmi_munmap+0x1f1/0x2b0 [ 59.011349] mmap_region+0x1f9/0x2660 [ 59.011861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.012391] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.013134] ? __pfx_lock_acquire+0x10/0x10 [ 59.013688] ? __pfx_mmap_region+0x10/0x10 [ 59.014238] ? security_mmap_addr+0x7d/0xa0 [ 59.014805] ? get_unmapped_area+0x1f5/0x3f0 [ 59.015373] do_mmap+0x854/0xf00 [ 59.015830] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.016352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.016949] ksys_mmap_pgoff+0x3af/0x500 [ 59.017476] do_syscall_64+0x3f/0x90 [ 59.017973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.018668] RIP: 0033:0x7faa12295d82 [ 59.019151] 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 [ 59.021384] RSP: 002b:00007ffe80d5b2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.022340] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa12295d82 [ 59.023231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa116cf000 [ 59.024123] RBP: 00007faa116cf000 R08: 0000000000000009 R09: 0000000000001000 [ 59.025014] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563114b7cf70 [ 59.025904] R13: 00007ffe80d5b2e0 R14: 00007ffe80d5b310 R15: 00007ffe80d5b670 [ 59.026813] [ 59.027119] [ 59.027345] Allocated by task 214: [ 59.027821] kasan_save_stack+0x22/0x50 [ 59.028353] kasan_set_track+0x25/0x30 [ 59.028875] __kasan_slab_alloc+0x59/0x70 [ 59.029422] kmem_cache_alloc+0x16b/0x370 [ 59.029962] vm_area_dup+0x20/0x160 [ 59.030456] __split_vma+0x170/0x950 [ 59.030948] split_vma+0xc6/0x110 [ 59.031403] mprotect_fixup+0x8d2/0xb30 [ 59.031926] do_mprotect_pkey+0x87e/0xd40 [ 59.032474] __x64_sys_mprotect+0x78/0xc0 [ 59.033024] do_syscall_64+0x3f/0x90 [ 59.033512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.034185] [ 59.034418] Freed by task 214: [ 59.034829] kasan_save_stack+0x22/0x50 [ 59.035353] kasan_set_track+0x25/0x30 [ 59.035876] kasan_save_free_info+0x2b/0x50 [ 59.036429] __kasan_slab_free+0x10a/0x190 [ 59.036982] kmem_cache_free+0x10d/0x4d0 [ 59.037512] rcu_core+0x8c8/0x2860 [ 59.037973] __do_softirq+0x1b7/0x7d4 [ 59.038568] [ 59.038793] Last potentially related work creation: [ 59.039406] kasan_save_stack+0x22/0x50 [ 59.039927] __kasan_record_aux_stack+0x8e/0xa0 [ 59.040527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.041196] remove_vma+0x139/0x170 [ 59.041670] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.042247] do_vmi_munmap+0x1f1/0x2b0 [ 59.042766] __vm_munmap+0x138/0x3a0 [ 59.043250] __x64_sys_munmap+0x59/0x80 [ 59.043769] do_syscall_64+0x3f/0x90 [ 59.044263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.044933] [ 59.045154] The buggy address belongs to the object at ffff888018c26570 [ 59.045154] which belongs to the cache vm_area_struct of size 168 [ 59.046701] The buggy address is located 88 bytes inside of [ 59.046701] freed 168-byte region [ffff888018c26570, ffff888018c26618) [ 59.048176] [ 59.048401] The buggy address belongs to the physical page: [ 59.049082] page:0000000074fdc299 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c26 [ 59.050231] memcg:ffff888018f9c801 [ 59.050696] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 59.051420] page_type: 0xffffffff() [ 59.051894] raw: 0100000000000200 ffff88800879fc80 ffffea0000390400 dead000000000007 [ 59.052851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f9c801 [ 59.053793] page dumped because: kasan: bad access detected [ 59.054488] [ 59.054710] Memory state around the buggy address: [ 59.055311] ffff888018c26480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.056197] ffff888018c26500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 59.057080] >ffff888018c26580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.057964] ^ [ 59.058672] ffff888018c26600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 59.059565] ffff888018c26680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.060443] ================================================================== [ 59.061496] Disabling lock debugging due to kernel taint [ 61.883979] BUG: Bad rss-counter state mm:00000000fd500234 type:MM_FILEPAGES val:33 [ 61.885036] BUG: Bad rss-counter state mm:00000000fd500234 type:MM_ANONPAGES val:22 [ 62.354919] BUG: Bad rss-counter state mm:0000000075d28853 type:MM_FILEPAGES val:33 [ 62.356081] BUG: Bad rss-counter state mm:0000000075d28853 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26171' (ECDSA) to the list of known hosts. 2023/06/19 23:15:34 fuzzer started 2023/06/19 23:15:34 dialing manager at localhost:44161 2023/06/19 23:15:34 checking machine... 2023/06/19 23:15:34 checking revisions... [ 63.050217] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:15:34 testing simple program... [ 63.101474] cgroup: Unknown subsys name 'net' [ 63.139627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff1100d9c1329 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e5d RFL=00000212 [----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 00007fa0c9b5c900 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=00007fa0ca113618 CR3=0000000009a54000 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=563412feff00545000000000000080fe 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=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=00007fd1b3395000 CR3=0000000008ed4000 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=53fd358b695885b81348ced81354a5ff XMM02=ec2efd57dc4c00df00000000001289e0 XMM03=88324bfbc214e2640000000000128ab0 XMM04=2ab9cf11e6bf61fe00000000000ae988 XMM05=59d5b690e0af863b000000000013cab8 XMM06=33bc2a0013a7daed000000000013b920 XMM07=e042d86d42eb936e000000000012d398 XMM08=88324bfbc214e2640000000000128ab0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000