syzkaller login: [ 76.919969] BUG: Bad rss-counter state mm:0000000035b38aff type:MM_FILEPAGES val:33 [ 76.921213] BUG: Bad rss-counter state mm:0000000035b38aff type:MM_ANONPAGES val:22 [ 76.961510] ================================================================== [ 76.962601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.963844] Read of size 8 at addr ffff888015a98140 by task sshd/221 [ 76.964798] [ 76.965056] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 76.966140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.967344] Call Trace: [ 76.967722] [ 76.968063] dump_stack_lvl+0x91/0xf0 [ 76.968652] print_report+0xcc/0x620 [ 76.969238] ? __virt_addr_valid+0x102/0x340 [ 76.969908] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.970646] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.971378] kasan_report+0xbe/0xf0 [ 76.971943] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.972711] vma_interval_tree_remove+0xc75/0xec0 [ 76.973440] vma_prepare+0xc54/0x11a0 [ 76.974033] __split_vma+0x5af/0x950 [ 76.974593] ? __pfx___split_vma+0x10/0x10 [ 76.975238] ? find_held_lock+0x2c/0x110 [ 76.975867] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.976551] ? lock_is_held_type+0x9f/0x120 [ 76.977217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.977968] ? mtree_range_walk+0x632/0x900 [ 76.978619] ? mas_walk+0x5c7/0x7c0 [ 76.979190] do_vmi_munmap+0x1f1/0x2b0 [ 76.979781] mmap_region+0x1f9/0x2660 [ 76.980364] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.980990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.981863] ? __pfx_lock_acquire+0x10/0x10 [ 76.982505] ? __pfx_mmap_region+0x10/0x10 [ 76.983129] ? security_mmap_addr+0x7d/0xa0 [ 76.983770] ? get_unmapped_area+0x1f5/0x3f0 [ 76.984428] do_mmap+0x854/0xf00 [ 76.984967] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.985553] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.986240] ksys_mmap_pgoff+0x3af/0x500 [ 76.986843] do_syscall_64+0x3f/0x90 [ 76.987410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.988186] RIP: 0033:0x7fc8969e2d82 [ 76.988764] 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 [ 76.990884] RSP: 002b:00007fffbdab3fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.991785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8969e2d82 [ 76.992645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc895e1c000 [ 76.993500] RBP: 00007fc895e1c000 R08: 0000000000000009 R09: 0000000000001000 [ 76.994346] R10: 0000000000000812 R11: 0000000000000206 R12: 000056449c55bec0 [ 76.995195] R13: 00007fffbdab4000 R14: 00007fffbdab4030 R15: 00007fffbdab4390 [ 76.996055] [ 76.996345] [ 76.996560] Allocated by task 214: [ 76.997000] kasan_save_stack+0x22/0x50 [ 76.997501] kasan_set_track+0x25/0x30 [ 76.997993] __kasan_slab_alloc+0x59/0x70 [ 76.998520] kmem_cache_alloc+0x16b/0x370 [ 76.999032] vm_area_dup+0x20/0x160 [ 76.999478] __split_vma+0x170/0x950 [ 76.999943] split_vma+0xc6/0x110 [ 77.000373] mprotect_fixup+0x8d2/0xb30 [ 77.000891] do_mprotect_pkey+0x87e/0xd40 [ 77.001404] __x64_sys_mprotect+0x78/0xc0 [ 77.001930] do_syscall_64+0x3f/0x90 [ 77.002389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.003015] [ 77.003229] Freed by task 26: [ 77.003620] kasan_save_stack+0x22/0x50 [ 77.004118] kasan_set_track+0x25/0x30 [ 77.004612] kasan_save_free_info+0x2b/0x50 [ 77.005154] __kasan_slab_free+0x10a/0x190 [ 77.005691] kmem_cache_free+0x10d/0x4d0 [ 77.006183] rcu_core+0x8c8/0x2860 [ 77.006619] __do_softirq+0x1b7/0x7d4 [ 77.007100] [ 77.007319] Last potentially related work creation: [ 77.007916] kasan_save_stack+0x22/0x50 [ 77.008416] __kasan_record_aux_stack+0x8e/0xa0 [ 77.009004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 77.009652] remove_vma+0x139/0x170 [ 77.010100] do_vmi_align_munmap+0xd4a/0x11f0 [ 77.010660] do_vmi_munmap+0x1f1/0x2b0 [ 77.011153] __vm_munmap+0x138/0x3a0 [ 77.011604] __x64_sys_munmap+0x59/0x80 [ 77.012091] do_syscall_64+0x3f/0x90 [ 77.012567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.013214] [ 77.013431] The buggy address belongs to the object at ffff888015a980e8 [ 77.013431] which belongs to the cache vm_area_struct of size 168 [ 77.014892] The buggy address is located 88 bytes inside of [ 77.014892] freed 168-byte region [ffff888015a980e8, ffff888015a98190) [ 77.016299] [ 77.016520] The buggy address belongs to the physical page: [ 77.017214] page:000000001f0cdc0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a98 [ 77.018317] memcg:ffff88800d078001 [ 77.018746] flags: 0x100000000000200(slab|node=0|zone=1) [ 77.019400] page_type: 0xffffffff() [ 77.019856] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 77.020770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d078001 [ 77.021670] page dumped because: kasan: bad access detected [ 77.022327] [ 77.022540] Memory state around the buggy address: [ 77.023133] ffff888015a98000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 77.023998] ffff888015a98080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 77.024863] >ffff888015a98100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 77.025707] ^ [ 77.026337] ffff888015a98180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 77.027190] ffff888015a98200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 77.028047] ================================================================== [ 77.029182] Disabling lock debugging due to kernel taint [ 78.746975] BUG: Bad rss-counter state mm:000000005b603bb0 type:MM_FILEPAGES val:33 [ 78.747962] BUG: Bad rss-counter state mm:000000005b603bb0 type:MM_ANONPAGES val:22 [ 79.212695] BUG: Bad rss-counter state mm:000000004699f53d type:MM_FILEPAGES val:33 [ 79.213677] BUG: Bad rss-counter state mm:000000004699f53d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13827' (ECDSA) to the list of known hosts. 2023/06/19 11:27:04 fuzzer started 2023/06/19 11:27:05 dialing manager at localhost:44161 2023/06/19 11:27:05 checking machine... 2023/06/19 11:27:05 checking revisions... [ 79.911589] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:27:05 testing simple program... [ 79.965223] cgroup: Unknown subsys name 'net' [ 80.017458] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:26:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1383 RSI=ffffffff8460144a RDI=ffff88806ce09b6c RBP=ffff88806ce09c18 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018113680 R15=ffff88800dfee7a0 RIP=ffffffff813ad4f7 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 00007ff4b2ddf900 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=00007f2e0ed51928 CR3=000000000e8c8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=ffff888008c58400 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=00007ffdb0515000 CR3=000000000e8c8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000