[ 34.791399] BUG: Bad rss-counter state mm:00000000ebf0d2e8 type:MM_FILEPAGES val:33 [ 34.792008] BUG: Bad rss-counter state mm:00000000ebf0d2e8 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.005246] ================================================================== [ 35.005847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.006637] Read of size 8 at addr ffff88800db99228 by task sshd/222 [ 35.007201] [ 35.007341] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.007896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.008535] Call Trace: [ 35.008737] [ 35.008920] dump_stack_lvl+0x91/0xf0 [ 35.009230] print_report+0xcc/0x620 [ 35.009539] ? __virt_addr_valid+0x102/0x340 [ 35.009908] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.010667] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.011725] kasan_report+0xbe/0xf0 [ 35.012558] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.013637] vma_interval_tree_remove+0xc75/0xec0 [ 35.014836] vma_prepare+0xc54/0x11a0 [ 35.015652] __split_vma+0x5af/0x950 [ 35.016421] ? __pfx___split_vma+0x10/0x10 [ 35.017289] ? find_held_lock+0x2c/0x110 [ 35.018287] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.019322] ? lock_is_held_type+0x9f/0x120 [ 35.020254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.021315] ? mtree_range_walk+0x632/0x900 [ 35.022346] ? mas_walk+0x5c7/0x7c0 [ 35.023132] do_vmi_munmap+0x1f1/0x2b0 [ 35.023962] mmap_region+0x1f9/0x2660 [ 35.024770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.025595] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.026937] ? __pfx_lock_acquire+0x10/0x10 [ 35.027887] ? __pfx_mmap_region+0x10/0x10 [ 35.028800] ? security_mmap_addr+0x7d/0xa0 [ 35.029699] ? get_unmapped_area+0x1f5/0x3f0 [ 35.030813] do_mmap+0x854/0xf00 [ 35.031570] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.032390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.033300] ksys_mmap_pgoff+0x3af/0x500 [ 35.034297] do_syscall_64+0x3f/0x90 [ 35.035127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.036227] RIP: 0033:0x7f4d0785dd82 [ 35.037000] 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 [ 35.041945] RSP: 002b:00007ffca50074c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.043514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d0785dd82 [ 35.045167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d06c97000 [ 35.046706] RBP: 00007f4d06c97000 R08: 0000000000000009 R09: 0000000000001000 [ 35.048285] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ec8ba7ec0 [ 35.049776] R13: 00007ffca50074e0 R14: 00007ffca5007510 R15: 00007ffca5007870 [ 35.051395] [ 35.052898] [ 35.053243] Allocated by task 213: [ 35.053965] kasan_save_stack+0x22/0x50 [ 35.054954] kasan_set_track+0x25/0x30 [ 35.055809] __kasan_slab_alloc+0x59/0x70 [ 35.056703] kmem_cache_alloc+0x16b/0x370 [ 35.057563] vm_area_dup+0x20/0x160 [ 35.058352] __split_vma+0x170/0x950 [ 35.059122] split_vma+0xc6/0x110 [ 35.059838] mprotect_fixup+0x8d2/0xb30 [ 35.060668] do_mprotect_pkey+0x87e/0xd40 [ 35.061575] __x64_sys_mprotect+0x78/0xc0 [ 35.062512] do_syscall_64+0x3f/0x90 [ 35.063331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.064407] [ 35.064741] Freed by task 213: [ 35.065405] kasan_save_stack+0x22/0x50 [ 35.066277] kasan_set_track+0x25/0x30 [ 35.067083] kasan_save_free_info+0x2b/0x50 [ 35.067972] __kasan_slab_free+0x10a/0x190 [ 35.068856] kmem_cache_free+0x10d/0x4d0 [ 35.069692] rcu_core+0x8c8/0x2860 [ 35.070451] __do_softirq+0x1b7/0x7d4 [ 35.071052] [ 35.071225] Last potentially related work creation: [ 35.071643] kasan_save_stack+0x22/0x50 [ 35.071977] __kasan_record_aux_stack+0x8e/0xa0 [ 35.072392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.072829] remove_vma+0x139/0x170 [ 35.073129] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.073499] do_vmi_munmap+0x1f1/0x2b0 [ 35.073823] __vm_munmap+0x138/0x3a0 [ 35.074144] __x64_sys_munmap+0x59/0x80 [ 35.074479] do_syscall_64+0x3f/0x90 [ 35.074855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.075324] [ 35.075467] The buggy address belongs to the object at ffff88800db991d0 [ 35.075467] which belongs to the cache vm_area_struct of size 168 [ 35.076478] The buggy address is located 88 bytes inside of [ 35.076478] freed 168-byte region [ffff88800db991d0, ffff88800db99278) [ 35.077427] [ 35.077573] The buggy address belongs to the physical page: [ 35.078013] page:000000008ba30fc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb99 [ 35.078791] memcg:ffff88800c904701 [ 35.079077] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.079512] page_type: 0xffffffff() [ 35.079814] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.080484] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c904701 [ 35.081120] page dumped because: kasan: bad access detected [ 35.081581] [ 35.081727] Memory state around the buggy address: [ 35.082131] ffff88800db99100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.082715] ffff88800db99180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.083290] >ffff88800db99200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.083867] ^ [ 35.084242] ffff88800db99280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.084822] ffff88800db99300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.085449] ================================================================== [ 35.086188] Disabling lock debugging due to kernel taint [ 37.242178] BUG: Bad rss-counter state mm:00000000493ff763 type:MM_FILEPAGES val:33 [ 37.242813] BUG: Bad rss-counter state mm:00000000493ff763 type:MM_ANONPAGES val:22 [ 37.879438] BUG: Bad rss-counter state mm:00000000d97cf3c6 type:MM_FILEPAGES val:33 [ 37.880017] BUG: Bad rss-counter state mm:00000000d97cf3c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28031' (ECDSA) to the list of known hosts. 2023/06/20 10:22:29 fuzzer started 2023/06/20 10:22:29 dialing manager at localhost:44161 2023/06/20 10:22:29 checking machine... 2023/06/20 10:22:29 checking revisions... [ 38.671543] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:22:29 testing simple program... [ 38.717929] cgroup: Unknown subsys name 'net' [ 38.764059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:22:24 Registers: info registers vcpu 0 RAX=fffffffffffffff0 RBX=0000000000000001 RCX=ffffffff86136d88 RDX=0000000000000008 RSI=ffff88800ff07940 RDI=ffff88800ff07670 RBP=ffff88800ff076c8 RSP=ffff88800ff075f8 R8 =0000000000000001 R9 =ffff88800ff076b0 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800ff076d0 R13=ffff88800ff076b8 R14=ffff88800ff07940 R15=ffff88800ff07670 RIP=ffffffff811303f0 RFL=00000283 [--S---C] 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 00007f1f8fa7e900 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=00007fc9051f1300 CR3=0000000015a20000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf3a2c0 RCX=ffffffff81377add RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806cf3a2d8 RSP=ffff888008e57d48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffffffff85616740 R13=0000000000000001 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff81378c02 RFL=00000283 [--S---C] 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 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=00007f2735278328 CR3=0000000005482000 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=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