syzkaller login: [ 67.080075] BUG: Bad rss-counter state mm:00000000dd4e0850 type:MM_FILEPAGES val:33 [ 67.081422] BUG: Bad rss-counter state mm:00000000dd4e0850 type:MM_ANONPAGES val:22 [ 67.118517] ================================================================== [ 67.119635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.120855] Read of size 8 at addr ffff88800cb24c20 by task sshd/220 [ 67.121793] [ 67.122049] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.123105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.124291] Call Trace: [ 67.124677] [ 67.125015] dump_stack_lvl+0x91/0xf0 [ 67.125583] print_report+0xcc/0x620 [ 67.126153] ? __virt_addr_valid+0x102/0x340 [ 67.126804] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.127543] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.128233] kasan_report+0xbe/0xf0 [ 67.128683] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.129274] vma_interval_tree_remove+0xc75/0xec0 [ 67.129851] vma_prepare+0xc54/0x11a0 [ 67.130304] __split_vma+0x5af/0x950 [ 67.130757] ? __pfx___split_vma+0x10/0x10 [ 67.131254] ? find_held_lock+0x2c/0x110 [ 67.131752] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.132296] ? lock_is_held_type+0x9f/0x120 [ 67.132804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.133374] ? mtree_range_walk+0x632/0x900 [ 67.133890] ? mas_walk+0x5c7/0x7c0 [ 67.134343] do_vmi_munmap+0x1f1/0x2b0 [ 67.134803] mmap_region+0x1f9/0x2660 [ 67.135254] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.135746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.136439] ? __pfx_lock_acquire+0x10/0x10 [ 67.136945] ? __pfx_mmap_region+0x10/0x10 [ 67.137450] ? security_mmap_addr+0x7d/0xa0 [ 67.137964] ? get_unmapped_area+0x1f5/0x3f0 [ 67.138505] do_mmap+0x854/0xf00 [ 67.138937] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.139414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.139960] ksys_mmap_pgoff+0x3af/0x500 [ 67.140461] do_syscall_64+0x3f/0x90 [ 67.140929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.141565] RIP: 0033:0x7f998eef1d82 [ 67.142013] 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 [ 67.144114] RSP: 002b:00007ffc492c9c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.145006] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f998eef1d82 [ 67.145842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f998e32b000 [ 67.146662] RBP: 00007f998e32b000 R08: 0000000000000009 R09: 0000000000001000 [ 67.147493] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637dbbbff60 [ 67.148348] R13: 00007ffc492c9c20 R14: 00007ffc492c9c50 R15: 00007ffc492c9fb0 [ 67.149202] [ 67.149488] [ 67.149700] Allocated by task 213: [ 67.150121] kasan_save_stack+0x22/0x50 [ 67.150622] kasan_set_track+0x25/0x30 [ 67.151102] __kasan_slab_alloc+0x59/0x70 [ 67.151612] kmem_cache_alloc+0x16b/0x370 [ 67.152125] vm_area_dup+0x20/0x160 [ 67.152580] __split_vma+0x170/0x950 [ 67.153036] split_vma+0xc6/0x110 [ 67.153465] mprotect_fixup+0x8d2/0xb30 [ 67.153967] do_mprotect_pkey+0x87e/0xd40 [ 67.154482] __x64_sys_mprotect+0x78/0xc0 [ 67.154992] do_syscall_64+0x3f/0x90 [ 67.155454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.156084] [ 67.156313] Freed by task 213: [ 67.156695] kasan_save_stack+0x22/0x50 [ 67.157194] kasan_set_track+0x25/0x30 [ 67.157687] kasan_save_free_info+0x2b/0x50 [ 67.158210] __kasan_slab_free+0x10a/0x190 [ 67.158739] kmem_cache_free+0x10d/0x4d0 [ 67.159232] rcu_core+0x8c8/0x2860 [ 67.159667] __do_softirq+0x1b7/0x7d4 [ 67.160159] [ 67.160369] Last potentially related work creation: [ 67.160947] kasan_save_stack+0x22/0x50 [ 67.161446] __kasan_record_aux_stack+0x8e/0xa0 [ 67.162006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.162631] remove_vma+0x139/0x170 [ 67.163059] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.163589] do_vmi_munmap+0x1f1/0x2b0 [ 67.164044] __vm_munmap+0x138/0x3a0 [ 67.164495] __x64_sys_munmap+0x59/0x80 [ 67.164967] do_syscall_64+0x3f/0x90 [ 67.165420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.166024] [ 67.166228] Second to last potentially related work creation: [ 67.166877] kasan_save_stack+0x22/0x50 [ 67.167353] __kasan_record_aux_stack+0x8e/0xa0 [ 67.167895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.168507] remove_vma+0x139/0x170 [ 67.168937] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.169464] do_vmi_munmap+0x1f1/0x2b0 [ 67.169930] mmap_region+0x1f9/0x2660 [ 67.170374] do_mmap+0x854/0xf00 [ 67.170782] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.171245] ksys_mmap_pgoff+0x3af/0x500 [ 67.171715] do_syscall_64+0x3f/0x90 [ 67.172176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.172790] [ 67.172997] The buggy address belongs to the object at ffff88800cb24bc8 [ 67.172997] which belongs to the cache vm_area_struct of size 168 [ 67.174429] The buggy address is located 88 bytes inside of [ 67.174429] freed 168-byte region [ffff88800cb24bc8, ffff88800cb24c70) [ 67.175812] [ 67.176022] The buggy address belongs to the physical page: [ 67.176652] page:0000000003fa5584 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb24 [ 67.177709] memcg:ffff888013fb6401 [ 67.178135] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 67.178817] page_type: 0xffffffff() [ 67.179251] raw: 0100000000000200 ffff88800879fc80 ffffea000032cf80 dead000000000003 [ 67.180165] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fb6401 [ 67.181049] page dumped because: kasan: bad access detected [ 67.181690] [ 67.181900] Memory state around the buggy address: [ 67.182463] ffff88800cb24b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.183308] ffff88800cb24b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 67.184158] >ffff88800cb24c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 67.184998] ^ [ 67.185507] ffff88800cb24c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 67.186337] ffff88800cb24d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 67.187162] ================================================================== [ 67.188189] Disabling lock debugging due to kernel taint [ 69.149364] BUG: Bad rss-counter state mm:000000007ed9ec21 type:MM_FILEPAGES val:33 [ 69.150515] BUG: Bad rss-counter state mm:000000007ed9ec21 type:MM_ANONPAGES val:22 [ 69.551000] BUG: Bad rss-counter state mm:0000000084403195 type:MM_FILEPAGES val:33 [ 69.552052] BUG: Bad rss-counter state mm:0000000084403195 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57242' (ECDSA) to the list of known hosts. 2023/06/19 13:53:20 fuzzer started 2023/06/19 13:53:20 dialing manager at localhost:44161 2023/06/19 13:53:20 checking machine... 2023/06/19 13:53:20 checking revisions... [ 70.279322] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:53:20 testing simple program... [ 70.327749] cgroup: Unknown subsys name 'net' [ 70.367876] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:53:14 Registers: info registers vcpu 0 RAX=000055c0cfab8eb1 RBX=00007ffe7297f920 RCX=0000000000000003 RDX=0000000000000000 RSI=00007fd539439da0 RDI=000055c0cfab8eb0 RBP=0000000000000013 RSP=00007ffe7297f8e8 R8 =000055c0cfae576f R9 =00007fd538ebcbe0 R10=000000000000006f R11=0000000000000246 R12=000055c0cfab8eb0 R13=00007ffe7297f918 R14=00007fd5388e5b22 R15=00007fd53890a710 RIP=00007fd538e58c81 RFL=00000287 [--S--PC] 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 00007fd53890a900 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=00007fd538ebf650 CR3=000000000cab2000 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=00000053000002a03b031b01003d0920 XMM02=000000000000000000000000ffff0000 XMM03=206e6f6974616e69626d6f6320796e61 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000ffffffffffffffffffffffffff XMM08=7922202c7974696c6962697400006877 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000031 RCX=0000000000000000 RDX=ffff88800e6db680 RSI=ffffffff81f593ff RDI=ffff8880099187c0 RBP=ffff88800b935800 RSP=ffff888016937a90 R8 =0000000000000005 R9 =0000000000000040 R10=0000000000000010 R11=0000000000000000 R12=ffff888008e1c0d8 R13=ffff888009918780 R14=0000000000000010 R15=dffffc0000000000 RIP=ffffffff81f5940f 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 00007fd53890a900 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=00007fd538ec20b0 CR3=000000000cab2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000