syzkaller login: [ 30.173953] BUG: Bad rss-counter state mm:000000006386506e type:MM_FILEPAGES val:33 [ 30.175239] BUG: Bad rss-counter state mm:000000006386506e type:MM_ANONPAGES val:22 [ 30.215322] ================================================================== [ 30.216424] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.217594] Read of size 8 at addr ffff88800d5e9058 by task sshd/219 [ 30.218427] [ 30.218694] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.219801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.220932] Call Trace: [ 30.221273] [ 30.221580] dump_stack_lvl+0x91/0xf0 [ 30.222096] print_report+0xcc/0x620 [ 30.222608] ? __virt_addr_valid+0x102/0x340 [ 30.223192] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.223846] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.224502] kasan_report+0xbe/0xf0 [ 30.225017] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.225707] vma_interval_tree_remove+0xc75/0xec0 [ 30.226354] vma_prepare+0xc54/0x11a0 [ 30.226876] __split_vma+0x5af/0x950 [ 30.227391] ? __pfx___split_vma+0x10/0x10 [ 30.227959] ? find_held_lock+0x2c/0x110 [ 30.228514] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.229113] ? lock_is_held_type+0x9f/0x120 [ 30.229702] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.230351] ? mtree_range_walk+0x632/0x900 [ 30.230943] ? mas_walk+0x5c7/0x7c0 [ 30.231457] do_vmi_munmap+0x1f1/0x2b0 [ 30.231981] mmap_region+0x1f9/0x2660 [ 30.232498] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.233040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.233803] ? __pfx_lock_acquire+0x10/0x10 [ 30.234368] ? __pfx_mmap_region+0x10/0x10 [ 30.234938] ? security_mmap_addr+0x7d/0xa0 [ 30.235504] ? get_unmapped_area+0x1f5/0x3f0 [ 30.236075] do_mmap+0x854/0xf00 [ 30.236540] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.237072] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.237685] ksys_mmap_pgoff+0x3af/0x500 [ 30.238221] do_syscall_64+0x3f/0x90 [ 30.238724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.239397] RIP: 0033:0x7f584f5a7d82 [ 30.239878] 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 [ 30.242132] RSP: 002b:00007fff980983d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.243073] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f584f5a7d82 [ 30.243977] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f584e9e1000 [ 30.244873] RBP: 00007f584e9e1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.245799] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a787e3ec0 [ 30.246658] R13: 00007fff980983f0 R14: 00007fff98098420 R15: 00007fff98098780 [ 30.247536] [ 30.247835] [ 30.248057] Allocated by task 212: [ 30.248496] kasan_save_stack+0x22/0x50 [ 30.249009] kasan_set_track+0x25/0x30 [ 30.249531] __kasan_slab_alloc+0x59/0x70 [ 30.250062] kmem_cache_alloc+0x16b/0x370 [ 30.250586] vm_area_dup+0x20/0x160 [ 30.251047] __split_vma+0x170/0x950 [ 30.251523] split_vma+0xc6/0x110 [ 30.251968] mprotect_fixup+0x8d2/0xb30 [ 30.252480] do_mprotect_pkey+0x87e/0xd40 [ 30.253008] __x64_sys_mprotect+0x78/0xc0 [ 30.253542] do_syscall_64+0x3f/0x90 [ 30.254025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.254674] [ 30.254892] Freed by task 13: [ 30.255284] kasan_save_stack+0x22/0x50 [ 30.255792] kasan_set_track+0x25/0x30 [ 30.256290] kasan_save_free_info+0x2b/0x50 [ 30.256829] __kasan_slab_free+0x10a/0x190 [ 30.257396] kmem_cache_free+0x10d/0x4d0 [ 30.257911] rcu_core+0x8c8/0x2860 [ 30.258362] __do_softirq+0x1b7/0x7d4 [ 30.258845] [ 30.259065] Last potentially related work creation: [ 30.259657] kasan_save_stack+0x22/0x50 [ 30.260171] __kasan_record_aux_stack+0x8e/0xa0 [ 30.260837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.261503] remove_vma+0x139/0x170 [ 30.261956] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.262511] do_vmi_munmap+0x1f1/0x2b0 [ 30.262996] __vm_munmap+0x138/0x3a0 [ 30.263469] __x64_sys_munmap+0x59/0x80 [ 30.263965] do_syscall_64+0x3f/0x90 [ 30.264443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.265090] [ 30.265307] The buggy address belongs to the object at ffff88800d5e9000 [ 30.265307] which belongs to the cache vm_area_struct of size 168 [ 30.266779] The buggy address is located 88 bytes inside of [ 30.266779] freed 168-byte region [ffff88800d5e9000, ffff88800d5e90a8) [ 30.268180] [ 30.268396] The buggy address belongs to the physical page: [ 30.269060] page:000000008ea811d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5e9 [ 30.270165] memcg:ffff88800dbd1601 [ 30.270590] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.271239] page_type: 0xffffffff() [ 30.271692] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.272619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbd1601 [ 30.273539] page dumped because: kasan: bad access detected [ 30.274203] [ 30.274423] Memory state around the buggy address: [ 30.275008] ffff88800d5e8f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.275876] ffff88800d5e8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.276741] >ffff88800d5e9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.277618] ^ [ 30.278338] ffff88800d5e9080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.279196] ffff88800d5e9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.280043] ================================================================== [ 30.280953] Disabling lock debugging due to kernel taint [ 32.829207] BUG: Bad rss-counter state mm:0000000090a40a07 type:MM_FILEPAGES val:33 [ 32.830465] BUG: Bad rss-counter state mm:0000000090a40a07 type:MM_ANONPAGES val:22 [ 33.332111] BUG: Bad rss-counter state mm:0000000037cf5524 type:MM_FILEPAGES val:33 [ 33.333333] BUG: Bad rss-counter state mm:0000000037cf5524 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38888' (ECDSA) to the list of known hosts. 2023/06/20 21:22:06 fuzzer started 2023/06/20 21:22:07 dialing manager at localhost:36067 2023/06/20 21:22:07 checking machine... 2023/06/20 21:22:07 checking revisions... [ 34.026509] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:22:07 testing simple program... [ 34.074779] cgroup: Unknown subsys name 'net' [ 34.134060] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:22:06 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=0000000000000001 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=00007ffe46dc7508 CR3=0000000005482000 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=00007faf9cfcb510000055aa6b724790 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 info registers vcpu 1 RAX=0000000000000008 RBX=ffffffff85dbd804 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff8880166c79c8 R8 =ffffffff860d8256 R9 =ffff8880166c7ac0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000212 [----A--] 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 00007fca19210900 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=00007fca197c80b0 CR3=000000000d94c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000