syzkaller login: [ 31.067012] BUG: Bad rss-counter state mm:00000000744450c2 type:MM_FILEPAGES val:33 [ 31.068864] BUG: Bad rss-counter state mm:00000000744450c2 type:MM_ANONPAGES val:22 [ 31.232632] ================================================================== [ 31.233540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.234490] Read of size 8 at addr ffff88800cbefc20 by task sshd/221 [ 31.235385] [ 31.235611] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237512] Call Trace: [ 31.237841] [ 31.238127] dump_stack_lvl+0x91/0xf0 [ 31.238620] print_report+0xcc/0x620 [ 31.239116] ? __virt_addr_valid+0x102/0x340 [ 31.239681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240310] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240937] kasan_report+0xbe/0xf0 [ 31.241433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242081] vma_interval_tree_remove+0xc75/0xec0 [ 31.242702] vma_prepare+0xc54/0x11a0 [ 31.243236] __split_vma+0x5af/0x950 [ 31.243735] ? __pfx___split_vma+0x10/0x10 [ 31.244283] ? find_held_lock+0x2c/0x110 [ 31.244828] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.245416] ? lock_is_held_type+0x9f/0x120 [ 31.245975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.246614] ? mtree_range_walk+0x632/0x900 [ 31.247175] ? mas_walk+0x5c7/0x7c0 [ 31.247654] do_vmi_munmap+0x1f1/0x2b0 [ 31.248152] mmap_region+0x1f9/0x2660 [ 31.248662] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.249202] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.249929] ? __pfx_lock_acquire+0x10/0x10 [ 31.250476] ? __pfx_mmap_region+0x10/0x10 [ 31.251003] ? security_mmap_addr+0x7d/0xa0 [ 31.251546] ? get_unmapped_area+0x1f5/0x3f0 [ 31.252100] do_mmap+0x854/0xf00 [ 31.252542] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.253037] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.253600] ksys_mmap_pgoff+0x3af/0x500 [ 31.254148] do_syscall_64+0x3f/0x90 [ 31.254648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255355] RIP: 0033:0x7f376d9a2d82 [ 31.255833] 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 [ 31.258042] RSP: 002b:00007ffcae0cf8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.258976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f376d9a2d82 [ 31.259859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f376cddc000 [ 31.260709] RBP: 00007f376cddc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.261602] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7a1285f70 [ 31.262445] R13: 00007ffcae0cf900 R14: 00007ffcae0cf930 R15: 00007ffcae0cfc90 [ 31.263345] [ 31.263643] [ 31.263862] Allocated by task 214: [ 31.264287] kasan_save_stack+0x22/0x50 [ 31.264793] kasan_set_track+0x25/0x30 [ 31.265287] __kasan_slab_alloc+0x59/0x70 [ 31.265810] kmem_cache_alloc+0x16b/0x370 [ 31.266322] vm_area_dup+0x20/0x160 [ 31.266778] __split_vma+0x170/0x950 [ 31.267254] split_vma+0xc6/0x110 [ 31.267701] mprotect_fixup+0x8d2/0xb30 [ 31.268234] do_mprotect_pkey+0x87e/0xd40 [ 31.268783] __x64_sys_mprotect+0x78/0xc0 [ 31.269316] do_syscall_64+0x3f/0x90 [ 31.269803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.270457] [ 31.270692] Freed by task 214: [ 31.271106] kasan_save_stack+0x22/0x50 [ 31.271611] kasan_set_track+0x25/0x30 [ 31.272115] kasan_save_free_info+0x2b/0x50 [ 31.272660] __kasan_slab_free+0x10a/0x190 [ 31.273221] kmem_cache_free+0x10d/0x4d0 [ 31.273729] rcu_core+0x8c8/0x2860 [ 31.274173] __do_softirq+0x1b7/0x7d4 [ 31.274655] [ 31.274872] Last potentially related work creation: [ 31.275469] kasan_save_stack+0x22/0x50 [ 31.275976] __kasan_record_aux_stack+0x8e/0xa0 [ 31.276547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.277191] remove_vma+0x139/0x170 [ 31.277643] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.278203] do_vmi_munmap+0x1f1/0x2b0 [ 31.278691] __vm_munmap+0x138/0x3a0 [ 31.279171] __x64_sys_munmap+0x59/0x80 [ 31.279676] do_syscall_64+0x3f/0x90 [ 31.280152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280799] [ 31.281017] The buggy address belongs to the object at ffff88800cbefbc8 [ 31.281017] which belongs to the cache vm_area_struct of size 168 [ 31.282471] The buggy address is located 88 bytes inside of [ 31.282471] freed 168-byte region [ffff88800cbefbc8, ffff88800cbefc70) [ 31.283895] [ 31.284111] The buggy address belongs to the physical page: [ 31.284778] page:00000000aa6961af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbef [ 31.285865] memcg:ffff88800fc66c01 [ 31.286290] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.286943] page_type: 0xffffffff() [ 31.287407] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.288316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc66c01 [ 31.289219] page dumped because: kasan: bad access detected [ 31.289897] [ 31.290116] Memory state around the buggy address: [ 31.290706] ffff88800cbefb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.291593] ffff88800cbefb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.292451] >ffff88800cbefc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.293298] ^ [ 31.293835] ffff88800cbefc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.294700] ffff88800cbefd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.295581] ================================================================== [ 31.296547] Disabling lock debugging due to kernel taint [ 33.235559] BUG: Bad rss-counter state mm:000000005e4aa21f type:MM_FILEPAGES val:33 [ 33.236834] BUG: Bad rss-counter state mm:000000005e4aa21f type:MM_ANONPAGES val:22 [ 33.728670] BUG: Bad rss-counter state mm:00000000165eade9 type:MM_FILEPAGES val:33 [ 33.729665] BUG: Bad rss-counter state mm:00000000165eade9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27147' (ECDSA) to the list of known hosts. 2023/06/20 12:42:39 fuzzer started 2023/06/20 12:42:39 dialing manager at localhost:36067 2023/06/20 12:42:39 checking machine... 2023/06/20 12:42:39 checking revisions... [ 34.469857] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:42:39 testing simple program... [ 34.524439] cgroup: Unknown subsys name 'net' [ 34.561155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:42:39 Registers: info registers vcpu 0 RAX=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff888009b20000 RSP=ffff88800f47f7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed1001364001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--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 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=00007fffdbd22ff8 CR3=000000000cb62000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110017919db RBX=ffff88800bc8cea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800bc8ced8 RBP=ffff888010888028 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880094d8a00 R14=ffffffff8186b835 R15=ffff888008c5e100 RIP=ffffffff818464e2 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 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=00007ffee780f498 CR3=0000000005482000 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=00007fb083d01510000055f4b96b7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000