syzkaller login: [ 38.743518] BUG: Bad rss-counter state mm:0000000097927b89 type:MM_FILEPAGES val:33 [ 38.744558] BUG: Bad rss-counter state mm:0000000097927b89 type:MM_ANONPAGES val:22 [ 38.924125] ================================================================== [ 38.925061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.925990] Read of size 8 at addr ffff888019fc2c20 by task sshd/219 [ 38.926774] [ 38.927011] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.927983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.928972] Call Trace: [ 38.929297] [ 38.929582] dump_stack_lvl+0x91/0xf0 [ 38.930072] print_report+0xcc/0x620 [ 38.930556] ? __virt_addr_valid+0x102/0x340 [ 38.931144] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931762] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932392] kasan_report+0xbe/0xf0 [ 38.932874] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933492] vma_interval_tree_remove+0xc75/0xec0 [ 38.934098] vma_prepare+0xc54/0x11a0 [ 38.934575] __split_vma+0x5af/0x950 [ 38.935074] ? __pfx___split_vma+0x10/0x10 [ 38.935605] ? find_held_lock+0x2c/0x110 [ 38.936133] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.936703] ? lock_is_held_type+0x9f/0x120 [ 38.937245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.937848] ? mtree_range_walk+0x632/0x900 [ 38.938402] ? mas_walk+0x5c7/0x7c0 [ 38.938881] do_vmi_munmap+0x1f1/0x2b0 [ 38.939409] mmap_region+0x1f9/0x2660 [ 38.939893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.940402] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.941114] ? __pfx_lock_acquire+0x10/0x10 [ 38.941655] ? __pfx_mmap_region+0x10/0x10 [ 38.942180] ? security_mmap_addr+0x7d/0xa0 [ 38.942717] ? get_unmapped_area+0x1f5/0x3f0 [ 38.943285] do_mmap+0x854/0xf00 [ 38.943725] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.944218] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.944784] ksys_mmap_pgoff+0x3af/0x500 [ 38.945296] do_syscall_64+0x3f/0x90 [ 38.945783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946432] RIP: 0033:0x7f3a3e56bd82 [ 38.946894] 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 [ 38.949063] RSP: 002b:00007ffcdd937de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.949964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a3e56bd82 [ 38.950834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a3d9a5000 [ 38.951713] RBP: 00007f3a3d9a5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.952567] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb9c96dec0 [ 38.953414] R13: 00007ffcdd937e00 R14: 00007ffcdd937e30 R15: 00007ffcdd938190 [ 38.954274] [ 38.954564] [ 38.954777] Allocated by task 212: [ 38.955237] kasan_save_stack+0x22/0x50 [ 38.955740] kasan_set_track+0x25/0x30 [ 38.956232] __kasan_slab_alloc+0x59/0x70 [ 38.956750] kmem_cache_alloc+0x16b/0x370 [ 38.957268] vm_area_dup+0x20/0x160 [ 38.957724] __split_vma+0x170/0x950 [ 38.958183] split_vma+0xc6/0x110 [ 38.958631] mprotect_fixup+0x8d2/0xb30 [ 38.959158] do_mprotect_pkey+0x87e/0xd40 [ 38.959679] __x64_sys_mprotect+0x78/0xc0 [ 38.960203] do_syscall_64+0x3f/0x90 [ 38.960685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961324] [ 38.961539] Freed by task 212: [ 38.961931] kasan_save_stack+0x22/0x50 [ 38.962431] kasan_set_track+0x25/0x30 [ 38.962931] kasan_save_free_info+0x2b/0x50 [ 38.963471] __kasan_slab_free+0x10a/0x190 [ 38.964007] kmem_cache_free+0x10d/0x4d0 [ 38.964514] rcu_core+0x8c8/0x2860 [ 38.964974] __do_softirq+0x1b7/0x7d4 [ 38.965513] [ 38.965736] Last potentially related work creation: [ 38.966328] kasan_save_stack+0x22/0x50 [ 38.966840] __kasan_record_aux_stack+0x8e/0xa0 [ 38.967448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.968088] remove_vma+0x139/0x170 [ 38.968536] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.969153] do_vmi_munmap+0x1f1/0x2b0 [ 38.969635] __vm_munmap+0x138/0x3a0 [ 38.970101] __x64_sys_munmap+0x59/0x80 [ 38.970617] do_syscall_64+0x3f/0x90 [ 38.971101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.971750] [ 38.971970] The buggy address belongs to the object at ffff888019fc2bc8 [ 38.971970] which belongs to the cache vm_area_struct of size 168 [ 38.973442] The buggy address is located 88 bytes inside of [ 38.973442] freed 168-byte region [ffff888019fc2bc8, ffff888019fc2c70) [ 38.974868] [ 38.975180] The buggy address belongs to the physical page: [ 38.975996] page:0000000048d528ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fc2 [ 38.977096] memcg:ffff888009b4e701 [ 38.977520] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.978219] page_type: 0xffffffff() [ 38.978667] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ede00 dead000000000007 [ 38.979597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b4e701 [ 38.980506] page dumped because: kasan: bad access detected [ 38.981178] [ 38.981410] Memory state around the buggy address: [ 38.981990] ffff888019fc2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.982971] ffff888019fc2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.984083] >ffff888019fc2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.985071] ^ [ 38.985602] ffff888019fc2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.986460] ffff888019fc2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.987369] ================================================================== [ 38.988312] Disabling lock debugging due to kernel taint [ 41.013477] BUG: Bad rss-counter state mm:00000000bd671908 type:MM_FILEPAGES val:33 [ 41.014702] BUG: Bad rss-counter state mm:00000000bd671908 type:MM_ANONPAGES val:22 [ 41.593472] BUG: Bad rss-counter state mm:00000000bdedf050 type:MM_FILEPAGES val:33 [ 41.594671] BUG: Bad rss-counter state mm:00000000bdedf050 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39149' (ECDSA) to the list of known hosts. 2023/06/21 00:03:48 fuzzer started 2023/06/21 00:03:49 dialing manager at localhost:36067 2023/06/21 00:03:49 checking machine... 2023/06/21 00:03:49 checking revisions... [ 42.286786] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:03:49 testing simple program... [ 42.328611] cgroup: Unknown subsys name 'net' [ 42.408685] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:03:48 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000003ad7 RSI=0000000000003ad7 RDI=ffffffff864f854c RBP=ffff888017b8f8a0 RSP=ffff888017b8f7d8 R8 =0000000000000000 R9 =ffff888017b8f888 R10=0000000000038001 R11=0000000000010b8d R12=ffff888017b8f8a8 R13=ffff888017b8f890 R14=ffff888017b8f889 R15=ffff888017b8f848 RIP=ffffffff811307c2 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 00007fb64989c900 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=00007fb649e540b0 CR3=000000000eee0000 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=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8180713d RBP=ffff88800d687630 RSP=ffff88800d687560 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff8880087b8500 R13=0000000000000000 R14=ffff88806cf40d70 R15=ffff88806cf40d50 RIP=ffffffff84511935 RFL=00000046 [---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 00007f96eb421900 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=00007f96ea8a05a0 CR3=000000000948c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2533328c3843234500000000000ae988 XMM05=b15de54932c411a00000000000133728 XMM06=c1cea001c5e384880000000000132158 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000