syzkaller login: [ 30.515872] BUG: Bad rss-counter state mm:00000000e5c04f81 type:MM_FILEPAGES val:33 [ 30.516941] BUG: Bad rss-counter state mm:00000000e5c04f81 type:MM_ANONPAGES val:22 [ 30.688309] ================================================================== [ 30.689276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.690267] Read of size 8 at addr ffff88800eb405c8 by task sshd/219 [ 30.691244] [ 30.691477] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.692391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.693431] Call Trace: [ 30.693788] [ 30.694102] dump_stack_lvl+0x91/0xf0 [ 30.694632] print_report+0xcc/0x620 [ 30.695170] ? __virt_addr_valid+0x102/0x340 [ 30.695754] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.696417] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.697089] kasan_report+0xbe/0xf0 [ 30.697602] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.698274] vma_interval_tree_remove+0xc75/0xec0 [ 30.698935] vma_prepare+0xc54/0x11a0 [ 30.699475] __split_vma+0x5af/0x950 [ 30.699992] ? __pfx___split_vma+0x10/0x10 [ 30.700572] ? find_held_lock+0x2c/0x110 [ 30.701138] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.701760] ? lock_is_held_type+0x9f/0x120 [ 30.702352] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.703017] ? mtree_range_walk+0x632/0x900 [ 30.703631] ? mas_walk+0x5c7/0x7c0 [ 30.704150] do_vmi_munmap+0x1f1/0x2b0 [ 30.704688] mmap_region+0x1f9/0x2660 [ 30.705216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.705799] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.706582] ? __pfx_lock_acquire+0x10/0x10 [ 30.707184] ? __pfx_mmap_region+0x10/0x10 [ 30.707769] ? security_mmap_addr+0x7d/0xa0 [ 30.708353] ? get_unmapped_area+0x1f5/0x3f0 [ 30.708953] do_mmap+0x854/0xf00 [ 30.709430] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.709970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.710589] ksys_mmap_pgoff+0x3af/0x500 [ 30.711158] do_syscall_64+0x3f/0x90 [ 30.711679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.712393] RIP: 0033:0x7f2df3215d82 [ 30.712892] 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 [ 30.715251] RSP: 002b:00007ffe5c448708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.716242] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2df3215d82 [ 30.717179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2df264f000 [ 30.718107] RBP: 00007f2df264f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.719041] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e95ea04d90 [ 30.719980] R13: 00007ffe5c448720 R14: 00007ffe5c448750 R15: 00007ffe5c448ab0 [ 30.720927] [ 30.721247] [ 30.721483] Allocated by task 212: [ 30.721950] kasan_save_stack+0x22/0x50 [ 30.722499] kasan_set_track+0x25/0x30 [ 30.723043] __kasan_slab_alloc+0x59/0x70 [ 30.723628] kmem_cache_alloc+0x16b/0x370 [ 30.724191] vm_area_dup+0x20/0x160 [ 30.724689] __split_vma+0x170/0x950 [ 30.725207] split_vma+0xc6/0x110 [ 30.725692] mprotect_fixup+0x8d2/0xb30 [ 30.726248] do_mprotect_pkey+0x87e/0xd40 [ 30.726813] __x64_sys_mprotect+0x78/0xc0 [ 30.727393] do_syscall_64+0x3f/0x90 [ 30.727914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728623] [ 30.728862] Freed by task 212: [ 30.729297] kasan_save_stack+0x22/0x50 [ 30.729853] kasan_set_track+0x25/0x30 [ 30.730389] kasan_save_free_info+0x2b/0x50 [ 30.730974] __kasan_slab_free+0x10a/0x190 [ 30.731574] kmem_cache_free+0x10d/0x4d0 [ 30.732190] rcu_core+0x8c8/0x2860 [ 30.732677] __do_softirq+0x1b7/0x7d4 [ 30.733203] [ 30.733439] Last potentially related work creation: [ 30.734083] kasan_save_stack+0x22/0x50 [ 30.734629] __kasan_record_aux_stack+0x8e/0xa0 [ 30.735269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.735976] remove_vma+0x139/0x170 [ 30.736474] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.737088] do_vmi_munmap+0x1f1/0x2b0 [ 30.737624] __vm_munmap+0x138/0x3a0 [ 30.738142] __x64_sys_munmap+0x59/0x80 [ 30.738688] do_syscall_64+0x3f/0x90 [ 30.739225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739935] [ 30.740177] The buggy address belongs to the object at ffff88800eb40570 [ 30.740177] which belongs to the cache vm_area_struct of size 168 [ 30.741785] The buggy address is located 88 bytes inside of [ 30.741785] freed 168-byte region [ffff88800eb40570, ffff88800eb40618) [ 30.743336] [ 30.743573] The buggy address belongs to the physical page: [ 30.744300] page:00000000caef519a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb40 [ 30.745497] memcg:ffff88800ca57801 [ 30.745963] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.746673] page_type: 0xffffffff() [ 30.747187] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.748227] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca57801 [ 30.749225] page dumped because: kasan: bad access detected [ 30.749929] [ 30.750159] Memory state around the buggy address: [ 30.750777] ffff88800eb40480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.751686] ffff88800eb40500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.752597] >ffff88800eb40580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.753540] ^ [ 30.754250] ffff88800eb40600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.755174] ffff88800eb40680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.756080] ================================================================== [ 30.757283] Disabling lock debugging due to kernel taint [ 33.339846] BUG: Bad rss-counter state mm:000000008b2cab05 type:MM_FILEPAGES val:33 [ 33.340996] BUG: Bad rss-counter state mm:000000008b2cab05 type:MM_ANONPAGES val:22 [ 33.849976] BUG: Bad rss-counter state mm:000000009a896730 type:MM_FILEPAGES val:33 [ 33.851256] BUG: Bad rss-counter state mm:000000009a896730 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43092' (ECDSA) to the list of known hosts. 2023/06/20 14:41:19 fuzzer started 2023/06/20 14:41:19 dialing manager at localhost:36067 2023/06/20 14:41:19 checking machine... 2023/06/20 14:41:19 checking revisions... [ 34.517815] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:41:19 testing simple program... [ 34.565252] cgroup: Unknown subsys name 'net' [ 34.603930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:41:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f2dd15ce500 CR3=000000000d5cc000 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=2038313a31343a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a31343a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff888019323390 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888019323394 RBP=1ffff1100d9e13a7 RSP=ffff88806cf09d30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000202 R13=ffff8880193233d0 R14=ffffffff818d9c06 R15=ffff88800e4a9280 RIP=ffffffff812e009a RFL=00000046 [---Z-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 00007f1c06717900 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=00007ffc023f2000 CR3=00000000165fe000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000