syzkaller login: [ 38.743115] BUG: Bad rss-counter state mm:0000000079639b13 type:MM_FILEPAGES val:33 [ 38.744050] BUG: Bad rss-counter state mm:0000000079639b13 type:MM_ANONPAGES val:22 [ 38.894084] ================================================================== [ 38.895197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.896327] Read of size 8 at addr ffff88800df89968 by task sshd/226 [ 38.897555] [ 38.897930] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.899122] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.900100] Call Trace: [ 38.900453] [ 38.900714] dump_stack_lvl+0x91/0xf0 [ 38.901160] print_report+0xcc/0x620 [ 38.901675] ? __virt_addr_valid+0x102/0x340 [ 38.902337] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902948] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903573] kasan_report+0xbe/0xf0 [ 38.904178] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904810] vma_interval_tree_remove+0xc75/0xec0 [ 38.905561] vma_prepare+0xc54/0x11a0 [ 38.906085] __split_vma+0x5af/0x950 [ 38.906545] ? __pfx___split_vma+0x10/0x10 [ 38.907099] ? find_held_lock+0x2c/0x110 [ 38.907751] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.908335] ? lock_is_held_type+0x9f/0x120 [ 38.908877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.909621] ? mtree_range_walk+0x632/0x900 [ 38.910265] ? mas_walk+0x5c7/0x7c0 [ 38.910833] do_vmi_munmap+0x1f1/0x2b0 [ 38.911406] mmap_region+0x1f9/0x2660 [ 38.911991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.912484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.913235] ? __pfx_lock_acquire+0x10/0x10 [ 38.913901] ? __pfx_mmap_region+0x10/0x10 [ 38.914421] ? security_mmap_addr+0x7d/0xa0 [ 38.914955] ? get_unmapped_area+0x1f5/0x3f0 [ 38.915628] do_mmap+0x854/0xf00 [ 38.916149] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.916619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.917261] ksys_mmap_pgoff+0x3af/0x500 [ 38.917863] do_syscall_64+0x3f/0x90 [ 38.918348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918974] RIP: 0033:0x7efdce710d82 [ 38.919496] 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 [ 38.921787] RSP: 002b:00007fff0d473cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.922697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdce710d82 [ 38.923680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdcdb4a000 [ 38.924545] RBP: 00007efdcdb4a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.925509] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561df542f60 [ 38.926396] R13: 00007fff0d473cf0 R14: 00007fff0d473d20 R15: 00007fff0d474080 [ 38.927294] [ 38.927654] [ 38.927922] Allocated by task 219: [ 38.928405] kasan_save_stack+0x22/0x50 [ 38.928955] kasan_set_track+0x25/0x30 [ 38.929560] __kasan_slab_alloc+0x59/0x70 [ 38.930076] kmem_cache_alloc+0x16b/0x370 [ 38.930590] vm_area_dup+0x20/0x160 [ 38.931027] __split_vma+0x170/0x950 [ 38.931602] split_vma+0xc6/0x110 [ 38.932121] mprotect_fixup+0x8d2/0xb30 [ 38.932605] do_mprotect_pkey+0x87e/0xd40 [ 38.933159] __x64_sys_mprotect+0x78/0xc0 [ 38.933800] do_syscall_64+0x3f/0x90 [ 38.934317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934963] [ 38.935232] Freed by task 219: [ 38.935718] kasan_save_stack+0x22/0x50 [ 38.936256] kasan_set_track+0x25/0x30 [ 38.936722] kasan_save_free_info+0x2b/0x50 [ 38.937350] __kasan_slab_free+0x10a/0x190 [ 38.938011] kmem_cache_free+0x10d/0x4d0 [ 38.938557] rcu_core+0x8c8/0x2860 [ 38.939009] __do_softirq+0x1b7/0x7d4 [ 38.939593] [ 38.939859] Last potentially related work creation: [ 38.940470] kasan_save_stack+0x22/0x50 [ 38.941076] __kasan_record_aux_stack+0x8e/0xa0 [ 38.941709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.942323] remove_vma+0x139/0x170 [ 38.942805] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.943502] do_vmi_munmap+0x1f1/0x2b0 [ 38.944001] __vm_munmap+0x138/0x3a0 [ 38.944443] __x64_sys_munmap+0x59/0x80 [ 38.945018] do_syscall_64+0x3f/0x90 [ 38.945576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946181] [ 38.946407] The buggy address belongs to the object at ffff88800df89910 [ 38.946407] which belongs to the cache vm_area_struct of size 168 [ 38.947998] The buggy address is located 88 bytes inside of [ 38.947998] freed 168-byte region [ffff88800df89910, ffff88800df899b8) [ 38.949520] [ 38.949718] The buggy address belongs to the physical page: [ 38.950357] page:00000000736afa45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf89 [ 38.951626] memcg:ffff88800ef1c401 [ 38.952075] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.952859] page_type: 0xffffffff() [ 38.953288] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392280 dead000000000002 [ 38.954234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef1c401 [ 38.955271] page dumped because: kasan: bad access detected [ 38.955945] [ 38.956207] Memory state around the buggy address: [ 38.956923] ffff88800df89800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.957799] ffff88800df89880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.958681] >ffff88800df89900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.959700] ^ [ 38.960433] ffff88800df89980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.961433] ffff88800df89a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.962268] ================================================================== [ 38.963344] Disabling lock debugging due to kernel taint [ 40.738194] BUG: Bad rss-counter state mm:0000000092c79fa5 type:MM_FILEPAGES val:33 [ 40.738985] BUG: Bad rss-counter state mm:0000000092c79fa5 type:MM_ANONPAGES val:22 [ 41.154579] BUG: Bad rss-counter state mm:00000000f27db96d type:MM_FILEPAGES val:33 [ 41.155863] BUG: Bad rss-counter state mm:00000000f27db96d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44122' (ECDSA) to the list of known hosts. 2023/06/21 03:06:11 fuzzer started 2023/06/21 03:06:12 dialing manager at localhost:36067 2023/06/21 03:06:12 checking machine... 2023/06/21 03:06:12 checking revisions... [ 41.870498] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:06:12 testing simple program... [ 41.912378] cgroup: Unknown subsys name 'net' [ 41.967525] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:06:11 Registers: info registers vcpu 0 RAX=ffffffff8363b743 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018ea7ac8 RSI=ffffffff8363b743 RDI=ffff888018ea7a80 RBP=ffff888018ea7ad8 RSP=ffff888018ea7a10 R8 =0000000000000001 R9 =ffff888018ea7ac0 R10=0000000000038001 R11=000000000008a95e R12=ffff888018ea7b48 R13=ffff888018ea7ac8 R14=ffff8880158a0000 R15=ffff888018ea7a80 RIP=ffffffff81130641 RFL=00000246 [---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 00007f50f7cb6900 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=00007f50f826e0b0 CR3=000000000eaf2000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008df7e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011befd3 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=00007f70d191b1c0 CR3=000000000c52e000 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=33f4b72134b1c38ee54e900b3bdda57b XMM02=2c67c8bc2e329bc3000000000011ec40 XMM03=fb795ef6d65770560000000000123f78 XMM04=838611120bdf44d800000000000ae988 XMM05=1319e678c5640f8a0000000000133410 XMM06=13e856d8d71426c800000000001332b8 XMM07=139997807ff5a44200000000001259e8 XMM08=e042d86d42eb936e0000000000124250 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000