syzkaller login: [ 24.438580] BUG: Bad rss-counter state mm:00000000f67ae187 type:MM_FILEPAGES val:33 [ 24.439778] BUG: Bad rss-counter state mm:00000000f67ae187 type:MM_ANONPAGES val:22 [ 24.484379] ================================================================== [ 24.485403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.486439] Read of size 8 at addr ffff88800dffa5c8 by task sshd/218 [ 24.487301] [ 24.487542] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.488500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.489587] Call Trace: [ 24.489938] [ 24.490251] dump_stack_lvl+0x91/0xf0 [ 24.490795] print_report+0xcc/0x620 [ 24.491327] ? __virt_addr_valid+0x102/0x340 [ 24.491940] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.492621] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.493319] kasan_report+0xbe/0xf0 [ 24.493844] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.494538] vma_interval_tree_remove+0xc75/0xec0 [ 24.495214] vma_prepare+0xc54/0x11a0 [ 24.495756] __split_vma+0x5af/0x950 [ 24.496283] ? __pfx___split_vma+0x10/0x10 [ 24.496878] ? find_held_lock+0x2c/0x110 [ 24.497476] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.498113] ? lock_is_held_type+0x9f/0x120 [ 24.498721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.499403] ? mtree_range_walk+0x632/0x900 [ 24.500023] ? mas_walk+0x5c7/0x7c0 [ 24.500553] do_vmi_munmap+0x1f1/0x2b0 [ 24.501105] mmap_region+0x1f9/0x2660 [ 24.501663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.502240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.503043] ? __pfx_lock_acquire+0x10/0x10 [ 24.503645] ? __pfx_mmap_region+0x10/0x10 [ 24.504240] ? security_mmap_addr+0x7d/0xa0 [ 24.504838] ? get_unmapped_area+0x1f5/0x3f0 [ 24.505482] do_mmap+0x854/0xf00 [ 24.505974] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.506535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.507169] ksys_mmap_pgoff+0x3af/0x500 [ 24.507737] do_syscall_64+0x3f/0x90 [ 24.508282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.509014] RIP: 0033:0x7ff82200dd82 [ 24.509539] 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 [ 24.511933] RSP: 002b:00007fffcfa485c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.512945] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff82200dd82 [ 24.513905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff821447000 [ 24.514856] RBP: 00007ff821447000 R08: 0000000000000009 R09: 0000000000001000 [ 24.515800] R10: 0000000000000812 R11: 0000000000000206 R12: 000055676784cec0 [ 24.516749] R13: 00007fffcfa485e0 R14: 00007fffcfa48610 R15: 00007fffcfa48970 [ 24.517729] [ 24.518057] [ 24.518299] Allocated by task 211: [ 24.518783] kasan_save_stack+0x22/0x50 [ 24.519347] kasan_set_track+0x25/0x30 [ 24.519898] __kasan_slab_alloc+0x59/0x70 [ 24.520483] kmem_cache_alloc+0x16b/0x370 [ 24.521057] vm_area_dup+0x20/0x160 [ 24.521567] __split_vma+0x170/0x950 [ 24.522085] split_vma+0xc6/0x110 [ 24.522574] mprotect_fixup+0x8d2/0xb30 [ 24.523135] do_mprotect_pkey+0x87e/0xd40 [ 24.523714] __x64_sys_mprotect+0x78/0xc0 [ 24.524298] do_syscall_64+0x3f/0x90 [ 24.524821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.525555] [ 24.525794] Freed by task 211: [ 24.526228] kasan_save_stack+0x22/0x50 [ 24.526789] kasan_set_track+0x25/0x30 [ 24.527340] kasan_save_free_info+0x2b/0x50 [ 24.527935] __kasan_slab_free+0x10a/0x190 [ 24.528523] kmem_cache_free+0x10d/0x4d0 [ 24.529091] rcu_core+0x8c8/0x2860 [ 24.529591] __do_softirq+0x1b7/0x7d4 [ 24.530121] [ 24.530361] Last potentially related work creation: [ 24.531014] kasan_save_stack+0x22/0x50 [ 24.531573] __kasan_record_aux_stack+0x8e/0xa0 [ 24.532196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.532902] remove_vma+0x139/0x170 [ 24.533407] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.534015] do_vmi_munmap+0x1f1/0x2b0 [ 24.534543] __vm_munmap+0x138/0x3a0 [ 24.535054] __x64_sys_munmap+0x59/0x80 [ 24.535601] do_syscall_64+0x3f/0x90 [ 24.536116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.536815] [ 24.537049] The buggy address belongs to the object at ffff88800dffa570 [ 24.537049] which belongs to the cache vm_area_struct of size 168 [ 24.538674] The buggy address is located 88 bytes inside of [ 24.538674] freed 168-byte region [ffff88800dffa570, ffff88800dffa618) [ 24.540209] [ 24.540444] The buggy address belongs to the physical page: [ 24.541173] page:00000000146e652a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdffa [ 24.542377] memcg:ffff88800e5dfe01 [ 24.542843] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.543608] page_type: 0xffffffff() [ 24.544106] raw: 0100000000000200 ffff88800879fc80 ffffea0000268000 dead000000000007 [ 24.545117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5dfe01 [ 24.546114] page dumped because: kasan: bad access detected [ 24.546847] [ 24.547083] Memory state around the buggy address: [ 24.547714] ffff88800dffa480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.548646] ffff88800dffa500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.549596] >ffff88800dffa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.550535] ^ [ 24.551265] ffff88800dffa600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.552190] ffff88800dffa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.553125] ================================================================== [ 24.554526] Disabling lock debugging due to kernel taint [ 26.558478] BUG: Bad rss-counter state mm:00000000bad96210 type:MM_FILEPAGES val:33 [ 26.559486] BUG: Bad rss-counter state mm:00000000bad96210 type:MM_ANONPAGES val:22 [ 27.111462] BUG: Bad rss-counter state mm:00000000ab560310 type:MM_FILEPAGES val:33 [ 27.112634] BUG: Bad rss-counter state mm:00000000ab560310 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31293' (ECDSA) to the list of known hosts. 2023/06/19 12:13:00 fuzzer started 2023/06/19 12:13:01 dialing manager at localhost:44161 2023/06/19 12:13:01 checking machine... 2023/06/19 12:13:01 checking revisions... [ 27.760901] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:13:01 testing simple program... [ 27.808646] cgroup: Unknown subsys name 'net' [ 27.844185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:13:00 Registers: info registers vcpu 0 RAX=ffffffff81f07e10 RBX=ffffffff852c78d8 RCX=0000000000000000 RDX=ffff88800ddb3680 RSI=ffffffff81ef148f RDI=ffff888010241900 RBP=dffffc0000000000 RSP=ffff8880147b7cb0 R8 =ffff8880147b7c70 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=ffff888010241900 R14=0000000000000000 R15=ffff888008f92000 RIP=ffffffff81f07e14 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 00007fec84d9c900 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=00007ffdef0e0000 CR3=000000001cc78000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7d4d3bccd0 CR3=000000000c998000 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=97ad47b818701987884181b0b3e78fce XMM02=2c67c8bc2e329bc3000000000011e718 XMM03=fb795ef6d65770560000000000124dd0 XMM04=3d4787ef3e46715000000000000ae988 XMM05=751b9502027dc0b900000000001349e0 XMM06=bdf2e299e47b49d50000000000134868 XMM07=e042d86d42eb936e00000000001250a8 XMM08=2e33d2476ca94024000000000011e778 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000