syzkaller login: [ 61.830396] BUG: Bad rss-counter state mm:00000000cb4c1cb3 type:MM_FILEPAGES val:33 [ 61.831170] BUG: Bad rss-counter state mm:00000000cb4c1cb3 type:MM_ANONPAGES val:22 [ 61.999271] ================================================================== [ 62.000335] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.001430] Read of size 8 at addr ffff88800c5eadf0 by task sshd/225 [ 62.002380] [ 62.002595] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.003449] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.004402] Call Trace: [ 62.004710] [ 62.004994] dump_stack_lvl+0x91/0xf0 [ 62.005471] print_report+0xcc/0x620 [ 62.005948] ? __virt_addr_valid+0x102/0x340 [ 62.006486] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.007085] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.007687] kasan_report+0xbe/0xf0 [ 62.008152] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.008754] vma_interval_tree_remove+0xc75/0xec0 [ 62.009346] vma_prepare+0xc54/0x11a0 [ 62.009817] __split_vma+0x5af/0x950 [ 62.010279] ? __pfx___split_vma+0x10/0x10 [ 62.010799] ? find_held_lock+0x2c/0x110 [ 62.011316] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.011881] ? lock_is_held_type+0x9f/0x120 [ 62.012402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.012991] ? mtree_range_walk+0x632/0x900 [ 62.013531] ? mas_walk+0x5c7/0x7c0 [ 62.013990] do_vmi_munmap+0x1f1/0x2b0 [ 62.014469] mmap_region+0x1f9/0x2660 [ 62.014936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.015435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.016137] ? __pfx_lock_acquire+0x10/0x10 [ 62.016651] ? __pfx_mmap_region+0x10/0x10 [ 62.017165] ? security_mmap_addr+0x7d/0xa0 [ 62.017680] ? get_unmapped_area+0x1f5/0x3f0 [ 62.018218] do_mmap+0x854/0xf00 [ 62.018642] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.019130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.019679] ksys_mmap_pgoff+0x3af/0x500 [ 62.020172] do_syscall_64+0x3f/0x90 [ 62.020633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.021259] RIP: 0033:0x7f6d02f0fd82 [ 62.021708] 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 [ 62.023771] RSP: 002b:00007fff169faac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.024651] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d02f0fd82 [ 62.025499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d02349000 [ 62.026339] RBP: 00007f6d02349000 R08: 0000000000000009 R09: 0000000000001000 [ 62.027180] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e655b7cb20 [ 62.028019] R13: 00007fff169faae0 R14: 00007fff169fab10 R15: 00007fff169fae70 [ 62.028883] [ 62.029184] [ 62.029401] Allocated by task 218: [ 62.029828] kasan_save_stack+0x22/0x50 [ 62.030322] kasan_set_track+0x25/0x30 [ 62.030813] __kasan_slab_alloc+0x59/0x70 [ 62.031330] kmem_cache_alloc+0x16b/0x370 [ 62.031857] vm_area_dup+0x20/0x160 [ 62.032302] __split_vma+0x170/0x950 [ 62.032763] split_vma+0xc6/0x110 [ 62.033191] mprotect_fixup+0x8d2/0xb30 [ 62.033683] do_mprotect_pkey+0x87e/0xd40 [ 62.034192] __x64_sys_mprotect+0x78/0xc0 [ 62.034711] do_syscall_64+0x3f/0x90 [ 62.035174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.035808] [ 62.036019] Freed by task 218: [ 62.036404] kasan_save_stack+0x22/0x50 [ 62.036899] kasan_set_track+0x25/0x30 [ 62.037387] kasan_save_free_info+0x2b/0x50 [ 62.037927] __kasan_slab_free+0x10a/0x190 [ 62.038461] kmem_cache_free+0x10d/0x4d0 [ 62.038972] rcu_core+0x8c8/0x2860 [ 62.039416] __do_softirq+0x1b7/0x7d4 [ 62.039901] [ 62.040116] Last potentially related work creation: [ 62.040706] kasan_save_stack+0x22/0x50 [ 62.041220] __kasan_record_aux_stack+0x8e/0xa0 [ 62.041795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.042448] remove_vma+0x139/0x170 [ 62.042902] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.043461] do_vmi_munmap+0x1f1/0x2b0 [ 62.043975] __vm_munmap+0x138/0x3a0 [ 62.044446] __x64_sys_munmap+0x59/0x80 [ 62.044944] do_syscall_64+0x3f/0x90 [ 62.045420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.046064] [ 62.046281] The buggy address belongs to the object at ffff88800c5ead98 [ 62.046281] which belongs to the cache vm_area_struct of size 168 [ 62.047776] The buggy address is located 88 bytes inside of [ 62.047776] freed 168-byte region [ffff88800c5ead98, ffff88800c5eae40) [ 62.049193] [ 62.049409] The buggy address belongs to the physical page: [ 62.050072] page:00000000b85b58d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5ea [ 62.051162] memcg:ffff888015963401 [ 62.051595] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.052246] page_type: 0xffffffff() [ 62.052698] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.053630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015963401 [ 62.054543] page dumped because: kasan: bad access detected [ 62.055206] [ 62.055423] Memory state around the buggy address: [ 62.056026] ffff88800c5eac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 62.056886] ffff88800c5ead00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 62.057750] >ffff88800c5ead80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 62.058607] ^ [ 62.059422] ffff88800c5eae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 62.060294] ffff88800c5eae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.061155] ================================================================== [ 62.062146] Disabling lock debugging due to kernel taint [ 64.083974] BUG: Bad rss-counter state mm:0000000047748cfb type:MM_FILEPAGES val:33 [ 64.085156] BUG: Bad rss-counter state mm:0000000047748cfb type:MM_ANONPAGES val:22 [ 64.491130] BUG: Bad rss-counter state mm:00000000e3abbc0a type:MM_FILEPAGES val:33 [ 64.492199] BUG: Bad rss-counter state mm:00000000e3abbc0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15145' (ECDSA) to the list of known hosts. 2023/06/19 23:04:12 fuzzer started 2023/06/19 23:04:12 dialing manager at localhost:44161 2023/06/19 23:04:12 checking machine... 2023/06/19 23:04:12 checking revisions... [ 65.219191] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:04:12 testing simple program... [ 65.271758] cgroup: Unknown subsys name 'net' [ 65.320456] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:03:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000014 RCX=00007ff125028e83 RDX=000000000000006e RSI=00007ff1250ec8a0 RDI=0000000000000003 RBP=00007ff125665956 RSP=00007ffe66f7b120 R8 =0000563fe4268350 R9 =0000000000000034 R10=0000563fe4272290 R11=0000000000000246 R12=0000000000000001 R13=00007ffe66f7b230 R14=0000000000000002 R15=0000563fe424a8b0 RIP=00007ff1250224b6 RFL=00000202 [-------] 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 00007ff124b36900 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=00007ff1250eb650 CR3=000000000df98000 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=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=00007ffdd9914c88 CR3=000000000e874000 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=2032313a34303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a34303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000