syzkaller login: [ 29.570936] BUG: Bad rss-counter state mm:000000009f9b710f type:MM_FILEPAGES val:33 [ 29.572133] BUG: Bad rss-counter state mm:000000009f9b710f type:MM_ANONPAGES val:22 [ 29.613571] ================================================================== [ 29.614553] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.615648] Read of size 8 at addr ffff88800c96c798 by task sshd/218 [ 29.616424] [ 29.616641] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.617511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.618502] Call Trace: [ 29.618829] [ 29.619118] dump_stack_lvl+0x91/0xf0 [ 29.619613] print_report+0xcc/0x620 [ 29.620136] ? __virt_addr_valid+0x102/0x340 [ 29.620702] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.621321] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.621939] kasan_report+0xbe/0xf0 [ 29.622429] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.623051] vma_interval_tree_remove+0xc75/0xec0 [ 29.623661] vma_prepare+0xc54/0x11a0 [ 29.624149] __split_vma+0x5af/0x950 [ 29.624625] ? __pfx___split_vma+0x10/0x10 [ 29.625153] ? find_held_lock+0x2c/0x110 [ 29.625687] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.626255] ? lock_is_held_type+0x9f/0x120 [ 29.626804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.627414] ? mtree_range_walk+0x632/0x900 [ 29.627989] ? mas_walk+0x5c7/0x7c0 [ 29.628466] do_vmi_munmap+0x1f1/0x2b0 [ 29.628954] mmap_region+0x1f9/0x2660 [ 29.629436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.629947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.630657] ? __pfx_lock_acquire+0x10/0x10 [ 29.631191] ? __pfx_mmap_region+0x10/0x10 [ 29.631730] ? security_mmap_addr+0x7d/0xa0 [ 29.632264] ? get_unmapped_area+0x1f5/0x3f0 [ 29.632815] do_mmap+0x854/0xf00 [ 29.633254] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.633749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.634316] ksys_mmap_pgoff+0x3af/0x500 [ 29.634821] do_syscall_64+0x3f/0x90 [ 29.635304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.635967] RIP: 0033:0x7fb8ad1a3d82 [ 29.636426] 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 [ 29.638569] RSP: 002b:00007ffea1ebc5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.639479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8ad1a3d82 [ 29.640336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8ac5dd000 [ 29.641186] RBP: 00007fb8ac5dd000 R08: 0000000000000009 R09: 0000000000001000 [ 29.642036] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a94e9d4b20 [ 29.642887] R13: 00007ffea1ebc600 R14: 00007ffea1ebc630 R15: 00007ffea1ebc990 [ 29.643775] [ 29.644072] [ 29.644286] Allocated by task 211: [ 29.644713] kasan_save_stack+0x22/0x50 [ 29.645219] kasan_set_track+0x25/0x30 [ 29.645711] __kasan_slab_alloc+0x59/0x70 [ 29.646238] kmem_cache_alloc+0x16b/0x370 [ 29.646755] vm_area_dup+0x20/0x160 [ 29.647207] __split_vma+0x170/0x950 [ 29.647670] split_vma+0xc6/0x110 [ 29.648129] mprotect_fixup+0x8d2/0xb30 [ 29.648637] do_mprotect_pkey+0x87e/0xd40 [ 29.649163] __x64_sys_mprotect+0x78/0xc0 [ 29.649688] do_syscall_64+0x3f/0x90 [ 29.650168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.650816] [ 29.651032] Freed by task 211: [ 29.651427] kasan_save_stack+0x22/0x50 [ 29.651943] kasan_set_track+0x25/0x30 [ 29.652434] kasan_save_free_info+0x2b/0x50 [ 29.652967] __kasan_slab_free+0x10a/0x190 [ 29.653498] kmem_cache_free+0x10d/0x4d0 [ 29.654005] rcu_core+0x8c8/0x2860 [ 29.654446] __do_softirq+0x1b7/0x7d4 [ 29.654942] [ 29.655156] Last potentially related work creation: [ 29.655764] kasan_save_stack+0x22/0x50 [ 29.656275] __kasan_record_aux_stack+0x8e/0xa0 [ 29.656857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.657496] remove_vma+0x139/0x170 [ 29.657953] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.658509] do_vmi_munmap+0x1f1/0x2b0 [ 29.658996] __vm_munmap+0x138/0x3a0 [ 29.659460] __x64_sys_munmap+0x59/0x80 [ 29.659967] do_syscall_64+0x3f/0x90 [ 29.660440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.661086] [ 29.661305] The buggy address belongs to the object at ffff88800c96c740 [ 29.661305] which belongs to the cache vm_area_struct of size 168 [ 29.662784] The buggy address is located 88 bytes inside of [ 29.662784] freed 168-byte region [ffff88800c96c740, ffff88800c96c7e8) [ 29.664214] [ 29.664433] The buggy address belongs to the physical page: [ 29.665102] page:00000000ebaa7921 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc96c [ 29.666195] memcg:ffff888009702001 [ 29.666624] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.667279] page_type: 0xffffffff() [ 29.667746] raw: 0100000000000200 ffff88800879fc80 ffffea0000380700 dead000000000004 [ 29.668668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009702001 [ 29.669590] page dumped because: kasan: bad access detected [ 29.670256] [ 29.670469] Memory state around the buggy address: [ 29.671051] ffff88800c96c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.671925] ffff88800c96c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.672777] >ffff88800c96c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.673629] ^ [ 29.674122] ffff88800c96c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.674973] ffff88800c96c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.675830] ================================================================== [ 29.676991] Disabling lock debugging due to kernel taint [ 31.226527] BUG: Bad rss-counter state mm:000000006441b892 type:MM_FILEPAGES val:33 [ 31.227255] BUG: Bad rss-counter state mm:000000006441b892 type:MM_ANONPAGES val:22 [ 31.609325] BUG: Bad rss-counter state mm:00000000bd843cd8 type:MM_FILEPAGES val:33 [ 31.610094] BUG: Bad rss-counter state mm:00000000bd843cd8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18399' (ECDSA) to the list of known hosts. 2023/06/19 12:39:49 fuzzer started 2023/06/19 12:39:50 dialing manager at localhost:44161 2023/06/19 12:39:50 checking machine... 2023/06/19 12:39:50 checking revisions... [ 32.230686] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:39:50 testing simple program... [ 32.264978] cgroup: Unknown subsys name 'net' [ 32.313581] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:39:48 Registers: info registers vcpu 0 RAX=ffff888019f3fb40 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019f3f601 RSI=ffff888019f3f6a0 RDI=ffff888019f3f6a0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b3e2e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888019f3f6a0 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f9814410900 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=00007f98143ba008 CR3=000000001a032000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 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=00007f0f6915e400 CR3=000000000eaf0000 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=2039343a39333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a39333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000