syzkaller login: [ 31.543226] BUG: Bad rss-counter state mm:00000000590fa5b7 type:MM_FILEPAGES val:33 [ 31.544434] BUG: Bad rss-counter state mm:00000000590fa5b7 type:MM_ANONPAGES val:22 [ 31.588747] ================================================================== [ 31.589975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.591105] Read of size 8 at addr ffff88801a7ea058 by task sshd/220 [ 31.592144] [ 31.592456] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.593637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.594934] Call Trace: [ 31.595251] [ 31.595530] dump_stack_lvl+0x91/0xf0 [ 31.596024] print_report+0xcc/0x620 [ 31.596513] ? __virt_addr_valid+0x102/0x340 [ 31.597070] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.597683] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.598290] kasan_report+0xbe/0xf0 [ 31.598773] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.599387] vma_interval_tree_remove+0xc75/0xec0 [ 31.600029] vma_prepare+0xc54/0x11a0 [ 31.600521] __split_vma+0x5af/0x950 [ 31.601005] ? __pfx___split_vma+0x10/0x10 [ 31.601542] ? find_held_lock+0x2c/0x110 [ 31.602085] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.602660] ? lock_is_held_type+0x9f/0x120 [ 31.603196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.603822] ? mtree_range_walk+0x632/0x900 [ 31.604530] ? mas_walk+0x5c7/0x7c0 [ 31.605098] do_vmi_munmap+0x1f1/0x2b0 [ 31.605600] mmap_region+0x1f9/0x2660 [ 31.606092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.606614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.607335] ? __pfx_lock_acquire+0x10/0x10 [ 31.607885] ? __pfx_mmap_region+0x10/0x10 [ 31.608434] ? security_mmap_addr+0x7d/0xa0 [ 31.608988] ? get_unmapped_area+0x1f5/0x3f0 [ 31.609545] do_mmap+0x854/0xf00 [ 31.610006] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.610506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.611103] ksys_mmap_pgoff+0x3af/0x500 [ 31.611623] do_syscall_64+0x3f/0x90 [ 31.612108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.612800] RIP: 0033:0x7f8ec87b7d82 [ 31.613262] 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 [ 31.615398] RSP: 002b:00007ffd6de19db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.616301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ec87b7d82 [ 31.617139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ec7bf1000 [ 31.617983] RBP: 00007f8ec7bf1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.618833] R10: 0000000000000812 R11: 0000000000000206 R12: 000055740d384d90 [ 31.619674] R13: 00007ffd6de19dd0 R14: 00007ffd6de19e00 R15: 00007ffd6de1a160 [ 31.620540] [ 31.620841] [ 31.621056] Allocated by task 213: [ 31.621474] kasan_save_stack+0x22/0x50 [ 31.621993] kasan_set_track+0x25/0x30 [ 31.622478] __kasan_slab_alloc+0x59/0x70 [ 31.623007] kmem_cache_alloc+0x16b/0x370 [ 31.623512] vm_area_dup+0x20/0x160 [ 31.623970] __split_vma+0x170/0x950 [ 31.624440] split_vma+0xc6/0x110 [ 31.624903] mprotect_fixup+0x8d2/0xb30 [ 31.625398] do_mprotect_pkey+0x87e/0xd40 [ 31.625918] __x64_sys_mprotect+0x78/0xc0 [ 31.626430] do_syscall_64+0x3f/0x90 [ 31.626910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.627538] [ 31.627763] Freed by task 19: [ 31.628145] kasan_save_stack+0x22/0x50 [ 31.628697] kasan_set_track+0x25/0x30 [ 31.629204] kasan_save_free_info+0x2b/0x50 [ 31.629846] __kasan_slab_free+0x10a/0x190 [ 31.630537] kmem_cache_free+0x10d/0x4d0 [ 31.631078] rcu_core+0x8c8/0x2860 [ 31.631552] __do_softirq+0x1b7/0x7d4 [ 31.632056] [ 31.632305] Last potentially related work creation: [ 31.632949] kasan_save_stack+0x22/0x50 [ 31.633494] __kasan_record_aux_stack+0x8e/0xa0 [ 31.634105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.634830] remove_vma+0x139/0x170 [ 31.635307] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.635906] do_vmi_munmap+0x1f1/0x2b0 [ 31.636427] __vm_munmap+0x138/0x3a0 [ 31.636929] __x64_sys_munmap+0x59/0x80 [ 31.637447] do_syscall_64+0x3f/0x90 [ 31.637952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.638622] [ 31.638852] The buggy address belongs to the object at ffff88801a7ea000 [ 31.638852] which belongs to the cache vm_area_struct of size 168 [ 31.640415] The buggy address is located 88 bytes inside of [ 31.640415] freed 168-byte region [ffff88801a7ea000, ffff88801a7ea0a8) [ 31.641901] [ 31.642129] The buggy address belongs to the physical page: [ 31.642818] page:000000006ec197bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a7ea [ 31.643947] memcg:ffff888015a62101 [ 31.644396] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.645079] page_type: 0xffffffff() [ 31.645536] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.646512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a62101 [ 31.647445] page dumped because: kasan: bad access detected [ 31.648126] [ 31.648374] Memory state around the buggy address: [ 31.648977] ffff88801a7e9f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.649887] ffff88801a7e9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.650941] >ffff88801a7ea000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.651858] ^ [ 31.652647] ffff88801a7ea080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.653546] ffff88801a7ea100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.654448] ================================================================== [ 31.655526] Disabling lock debugging due to kernel taint [ 34.119897] BUG: Bad rss-counter state mm:000000006b4d9b1f type:MM_FILEPAGES val:33 [ 34.120960] BUG: Bad rss-counter state mm:000000006b4d9b1f type:MM_ANONPAGES val:22 [ 34.598918] BUG: Bad rss-counter state mm:00000000487c23e5 type:MM_FILEPAGES val:33 [ 34.600093] BUG: Bad rss-counter state mm:00000000487c23e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20516' (ECDSA) to the list of known hosts. 2023/06/21 06:24:01 fuzzer started 2023/06/21 06:24:02 dialing manager at localhost:36067 2023/06/21 06:24:02 checking machine... 2023/06/21 06:24:02 checking revisions... [ 35.318372] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:24:02 testing simple program... [ 35.360816] cgroup: Unknown subsys name 'net' [ 35.420934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:24:01 Registers: info registers vcpu 0 RAX=19206eab3fad9700 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed100d9c13ab RSP=ffff88806ce09d48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff81803bfc R14=ffffffff818d9c06 R15=ffff88801470c280 RIP=ffffffff812d8a44 RFL=00000282 [--S----] 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 00007fb2aa466900 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=00007fb2aaa1b650 CR3=000000000dd48000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1ba964abb0 CR3=000000000d6ba000 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=c40835ea25a2c497094397c3d15e8950 XMM02=2c67c8bc2e329bc3000000000011d410 XMM03=fb795ef6d65770560000000000121bb0 XMM04=e7d8967b563aa63a00000000000ae988 XMM05=19e9129bd510f2350000000000131988 XMM06=55a0b06e5917775300000000001307f0 XMM07=e042d86d42eb936e0000000000121e30 XMM08=55e3d2e6f556e30e000000000011d470 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000