[ 23.806943] BUG: Bad rss-counter state mm:00000000d0f598fd type:MM_FILEPAGES val:33 [ 23.808520] BUG: Bad rss-counter state mm:00000000d0f598fd type:MM_ANONPAGES val:22 [ 23.966370] ================================================================== [ 23.967300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.968248] Read of size 8 at addr ffff88800fb39968 by task sshd/220 [ 23.969225] [ 23.969453] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.970337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.971328] Call Trace: [ 23.971680] [ 23.971971] dump_stack_lvl+0x91/0xf0 [ 23.972493] print_report+0xcc/0x620 [ 23.972989] ? __virt_addr_valid+0x102/0x340 [ 23.973555] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.974167] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.974784] kasan_report+0xbe/0xf0 [ 23.975254] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.975876] vma_interval_tree_remove+0xc75/0xec0 [ 23.976487] vma_prepare+0xc54/0x11a0 [ 23.976967] __split_vma+0x5af/0x950 [ 23.977450] ? __pfx___split_vma+0x10/0x10 [ 23.977974] ? find_held_lock+0x2c/0x110 [ 23.978506] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.979072] ? lock_is_held_type+0x9f/0x120 [ 23.979615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.980231] ? mtree_range_walk+0x632/0x900 [ 23.980796] ? mas_walk+0x5c7/0x7c0 [ 23.981270] do_vmi_munmap+0x1f1/0x2b0 [ 23.981758] mmap_region+0x1f9/0x2660 [ 23.982237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.982747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.983499] ? __pfx_lock_acquire+0x10/0x10 [ 23.984055] ? __pfx_mmap_region+0x10/0x10 [ 23.984625] ? security_mmap_addr+0x7d/0xa0 [ 23.985180] ? get_unmapped_area+0x1f5/0x3f0 [ 23.985751] do_mmap+0x854/0xf00 [ 23.986210] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.986721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.987303] ksys_mmap_pgoff+0x3af/0x500 [ 23.987836] do_syscall_64+0x3f/0x90 [ 23.988341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.989010] RIP: 0033:0x7f7b8ab9bd82 [ 23.989488] 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 [ 23.991705] RSP: 002b:00007ffce8a15628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.992674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b8ab9bd82 [ 23.993550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b89fd5000 [ 23.994424] RBP: 00007f7b89fd5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.995299] R10: 0000000000000812 R11: 0000000000000206 R12: 000055733d843f70 [ 23.996178] R13: 00007ffce8a15640 R14: 00007ffce8a15670 R15: 00007ffce8a159d0 [ 23.997085] [ 23.997385] [ 23.997606] Allocated by task 213: [ 23.998054] kasan_save_stack+0x22/0x50 [ 23.998578] kasan_set_track+0x25/0x30 [ 23.999090] __kasan_slab_alloc+0x59/0x70 [ 23.999631] kmem_cache_alloc+0x16b/0x370 [ 24.000168] vm_area_dup+0x20/0x160 [ 24.000660] __split_vma+0x170/0x950 [ 24.001143] split_vma+0xc6/0x110 [ 24.001599] mprotect_fixup+0x8d2/0xb30 [ 24.002122] do_mprotect_pkey+0x87e/0xd40 [ 24.002660] __x64_sys_mprotect+0x78/0xc0 [ 24.003198] do_syscall_64+0x3f/0x90 [ 24.003688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.004363] [ 24.004583] Freed by task 213: [ 24.004989] kasan_save_stack+0x22/0x50 [ 24.005510] kasan_set_track+0x25/0x30 [ 24.006020] kasan_save_free_info+0x2b/0x50 [ 24.006573] __kasan_slab_free+0x10a/0x190 [ 24.007129] kmem_cache_free+0x10d/0x4d0 [ 24.007657] rcu_core+0x8c8/0x2860 [ 24.008128] __do_softirq+0x1b7/0x7d4 [ 24.008637] [ 24.008858] Last potentially related work creation: [ 24.009461] kasan_save_stack+0x22/0x50 [ 24.009979] __kasan_record_aux_stack+0x8e/0xa0 [ 24.010641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.011311] remove_vma+0x139/0x170 [ 24.011778] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.012363] do_vmi_munmap+0x1f1/0x2b0 [ 24.012872] __vm_munmap+0x138/0x3a0 [ 24.013354] __x64_sys_munmap+0x59/0x80 [ 24.013871] do_syscall_64+0x3f/0x90 [ 24.014363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.015029] [ 24.015256] The buggy address belongs to the object at ffff88800fb39910 [ 24.015256] which belongs to the cache vm_area_struct of size 168 [ 24.016808] The buggy address is located 88 bytes inside of [ 24.016808] freed 168-byte region [ffff88800fb39910, ffff88800fb399b8) [ 24.018275] [ 24.018497] The buggy address belongs to the physical page: [ 24.019296] page:00000000a1e100f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb39 [ 24.020414] memcg:ffff88800d5ca601 [ 24.020845] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.021494] page_type: 0xffffffff() [ 24.021949] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.022884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5ca601 [ 24.023796] page dumped because: kasan: bad access detected [ 24.024470] [ 24.024686] Memory state around the buggy address: [ 24.025270] ffff88800fb39800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.026134] ffff88800fb39880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.026993] >ffff88800fb39900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.027853] ^ [ 24.028658] ffff88800fb39980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.029529] ffff88800fb39a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.030388] ================================================================== [ 24.031315] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.073573] BUG: Bad rss-counter state mm:000000004aa48137 type:MM_FILEPAGES val:33 [ 26.074795] BUG: Bad rss-counter state mm:000000004aa48137 type:MM_ANONPAGES val:22 [ 26.532631] BUG: Bad rss-counter state mm:00000000ba557930 type:MM_FILEPAGES val:33 [ 26.533633] BUG: Bad rss-counter state mm:00000000ba557930 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3978' (ECDSA) to the list of known hosts. 2023/06/20 22:53:21 fuzzer started 2023/06/20 22:53:21 dialing manager at localhost:36067 2023/06/20 22:53:21 checking machine... 2023/06/20 22:53:21 checking revisions... [ 27.268214] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:53:21 testing simple program... [ 27.317378] cgroup: Unknown subsys name 'net' [ 27.414318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:20 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffffffff85da073c RCX=ffffffff811fbebd RDX=0000000000000000 RSI=ffffffff860ac906 RDI=ffffffff85da0718 RBP=ffffffff85da0734 RSP=ffff8880147b7618 R8 =ffffffff860ac906 R9 =ffff8880147b7710 R10=0000000000038001 R11=0000000000009755 R12=ffffffff85da0748 R13=ffffffff85da0718 R14=ffffffff85da0730 R15=dffffc0000000000 RIP=ffffffff8112fc85 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 00007f27deef1900 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=00007f27de40e000 CR3=000000000cb12000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=749c85011c989d9200000000000ae988 XMM05=753210ef983b39170000000000131ef0 XMM06=4fda316b135da52b0000000000130c20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016de8ab0 RBX=ffff888016de8ab0 RCX=00000000000d000c RDX=00000000800d000c RSI=ffff888016de8ab0 RDI=ffff888016ba7910 RBP=ffff888016ba7a28 RSP=ffff888016ba79a0 R8 =00000000000d000c R9 =ffffed1002d74f22 R10=0000000000000003 R11=00000000000d000c R12=ffff88800844f780 R13=ffff88800844e900 R14=ffffea00005b7a00 R15=00000000800d000c RIP=ffffffff81805e3b RFL=00000042 [---Z---] 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 00007f91ad69d900 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=00007ffd1985e000 CR3=000000000e44a000 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