syzkaller login: [ 30.608771] BUG: Bad rss-counter state mm:00000000c179fb55 type:MM_FILEPAGES val:33 [ 30.610174] BUG: Bad rss-counter state mm:00000000c179fb55 type:MM_ANONPAGES val:22 [ 30.760494] ================================================================== [ 30.761451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.762403] Read of size 8 at addr ffff88800a11b228 by task sshd/220 [ 30.763271] [ 30.763492] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.764379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.765389] Call Trace: [ 30.765711] [ 30.765999] dump_stack_lvl+0x91/0xf0 [ 30.766500] print_report+0xcc/0x620 [ 30.766997] ? __virt_addr_valid+0x102/0x340 [ 30.767557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768209] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768844] kasan_report+0xbe/0xf0 [ 30.769324] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769947] vma_interval_tree_remove+0xc75/0xec0 [ 30.770556] vma_prepare+0xc54/0x11a0 [ 30.771037] __split_vma+0x5af/0x950 [ 30.771513] ? __pfx___split_vma+0x10/0x10 [ 30.772056] ? find_held_lock+0x2c/0x110 [ 30.772576] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.773149] ? lock_is_held_type+0x9f/0x120 [ 30.773693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.774311] ? mtree_range_walk+0x632/0x900 [ 30.774863] ? mas_walk+0x5c7/0x7c0 [ 30.775341] do_vmi_munmap+0x1f1/0x2b0 [ 30.775833] mmap_region+0x1f9/0x2660 [ 30.776321] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.776835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.777563] ? __pfx_lock_acquire+0x10/0x10 [ 30.778106] ? __pfx_mmap_region+0x10/0x10 [ 30.778639] ? security_mmap_addr+0x7d/0xa0 [ 30.779172] ? get_unmapped_area+0x1f5/0x3f0 [ 30.779725] do_mmap+0x854/0xf00 [ 30.780191] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.780692] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.781254] ksys_mmap_pgoff+0x3af/0x500 [ 30.781763] do_syscall_64+0x3f/0x90 [ 30.782247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782899] RIP: 0033:0x7f350baa0d82 [ 30.783352] 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 [ 30.785485] RSP: 002b:00007fff51c2fc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.786384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f350baa0d82 [ 30.787226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f350aeda000 [ 30.788085] RBP: 00007f350aeda000 R08: 0000000000000009 R09: 0000000000001000 [ 30.788935] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af8e2ceec0 [ 30.789779] R13: 00007fff51c2fc50 R14: 00007fff51c2fc80 R15: 00007fff51c2ffe0 [ 30.790634] [ 30.790934] [ 30.791153] Allocated by task 213: [ 30.791582] kasan_save_stack+0x22/0x50 [ 30.792095] kasan_set_track+0x25/0x30 [ 30.792596] __kasan_slab_alloc+0x59/0x70 [ 30.793123] kmem_cache_alloc+0x16b/0x370 [ 30.793639] vm_area_dup+0x20/0x160 [ 30.794093] __split_vma+0x170/0x950 [ 30.794570] split_vma+0xc6/0x110 [ 30.795016] mprotect_fixup+0x8d2/0xb30 [ 30.795527] do_mprotect_pkey+0x87e/0xd40 [ 30.796071] __x64_sys_mprotect+0x78/0xc0 [ 30.796595] do_syscall_64+0x3f/0x90 [ 30.797076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797717] [ 30.797935] Freed by task 213: [ 30.798333] kasan_save_stack+0x22/0x50 [ 30.798850] kasan_set_track+0x25/0x30 [ 30.799342] kasan_save_free_info+0x2b/0x50 [ 30.799891] __kasan_slab_free+0x10a/0x190 [ 30.800454] kmem_cache_free+0x10d/0x4d0 [ 30.800972] rcu_core+0x8c8/0x2860 [ 30.801422] __do_softirq+0x1b7/0x7d4 [ 30.801919] [ 30.802135] Last potentially related work creation: [ 30.802739] kasan_save_stack+0x22/0x50 [ 30.803259] __kasan_record_aux_stack+0x8e/0xa0 [ 30.803878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.804549] remove_vma+0x139/0x170 [ 30.805012] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.805565] do_vmi_munmap+0x1f1/0x2b0 [ 30.806057] __vm_munmap+0x138/0x3a0 [ 30.806529] __x64_sys_munmap+0x59/0x80 [ 30.807030] do_syscall_64+0x3f/0x90 [ 30.807509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808180] [ 30.808394] The buggy address belongs to the object at ffff88800a11b1d0 [ 30.808394] which belongs to the cache vm_area_struct of size 168 [ 30.809893] The buggy address is located 88 bytes inside of [ 30.809893] freed 168-byte region [ffff88800a11b1d0, ffff88800a11b278) [ 30.811325] [ 30.811539] The buggy address belongs to the physical page: [ 30.812220] page:00000000514096c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa11b [ 30.813327] memcg:ffff88800df04001 [ 30.813756] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.814398] page_type: 0xffffffff() [ 30.814857] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.815798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df04001 [ 30.816737] page dumped because: kasan: bad access detected [ 30.817415] [ 30.817637] Memory state around the buggy address: [ 30.818228] ffff88800a11b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.819086] ffff88800a11b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.819953] >ffff88800a11b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.820822] ^ [ 30.821379] ffff88800a11b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.822250] ffff88800a11b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.823107] ================================================================== [ 30.824393] Disabling lock debugging due to kernel taint [ 32.765551] BUG: Bad rss-counter state mm:0000000068f71de3 type:MM_FILEPAGES val:33 [ 32.766734] BUG: Bad rss-counter state mm:0000000068f71de3 type:MM_ANONPAGES val:22 [ 33.244400] BUG: Bad rss-counter state mm:0000000013487600 type:MM_FILEPAGES val:33 [ 33.245696] BUG: Bad rss-counter state mm:0000000013487600 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55813' (ECDSA) to the list of known hosts. 2023/06/21 00:49:45 fuzzer started 2023/06/21 00:49:45 dialing manager at localhost:36067 2023/06/21 00:49:45 checking machine... 2023/06/21 00:49:45 checking revisions... [ 33.891553] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:49:45 testing simple program... [ 33.944116] cgroup: Unknown subsys name 'net' [ 33.995806] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:49:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=176a8637ed61a8dc RCX=0000000000000000 RDX=ffff8880160a1800 RSI=ffff88800885a840 RDI=ffff8880165e0c80 RBP=ffff88800885a840 RSP=ffff8880146af990 R8 =0000000000000004 R9 =000000000000e28e R10=000000000000e28e R11=0000000000000001 R12=ffff8880160a1e50 R13=ffff8880165e0c80 R14=ffff8880146afa70 R15=0000000000000053 RIP=ffffffff83c16912 RFL=00000293 [--S-A-C] 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 00007efc246e1900 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=00007efc23b194d0 CR3=000000000ef9a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=786be092af1a03a700000000000ae988 XMM05=a07a6be2c97b637200000000001324f8 XMM06=19e9129bd510f2350000000000131390 XMM07=fb795ef6d657705600000000001215c8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f65490dd618 CR3=000000000c63e000 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=2035343a39343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000