[ 23.900367] BUG: Bad rss-counter state mm:00000000c9ddb4f5 type:MM_FILEPAGES val:33 [ 23.901501] BUG: Bad rss-counter state mm:00000000c9ddb4f5 type:MM_ANONPAGES val:22 [ 23.979557] ================================================================== [ 23.980271] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.980992] Read of size 8 at addr ffff88801a338140 by task sshd/220 [ 23.981582] [ 23.981748] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.982401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.983283] Call Trace: [ 23.983541] <TASK> [ 23.983759] dump_stack_lvl+0x91/0xf0 [ 23.984137] print_report+0xcc/0x620 [ 23.984405] ? __virt_addr_valid+0x102/0x340 [ 23.984711] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.985050] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.985389] kasan_report+0xbe/0xf0 [ 23.985676] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.986015] vma_interval_tree_remove+0xc75/0xec0 [ 23.986353] vma_prepare+0xc54/0x11a0 [ 23.986618] __split_vma+0x5af/0x950 [ 23.986878] ? __pfx___split_vma+0x10/0x10 [ 23.987170] ? find_held_lock+0x2c/0x110 [ 23.987463] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.987774] ? lock_is_held_type+0x9f/0x120 [ 23.988081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.988413] ? mtree_range_walk+0x632/0x900 [ 23.988717] ? mas_walk+0x5c7/0x7c0 [ 23.988979] do_vmi_munmap+0x1f1/0x2b0 [ 23.989248] mmap_region+0x1f9/0x2660 [ 23.989515] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.989799] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.990193] ? __pfx_lock_acquire+0x10/0x10 [ 23.990487] ? __pfx_mmap_region+0x10/0x10 [ 23.990778] ? security_mmap_addr+0x7d/0xa0 [ 23.991071] ? get_unmapped_area+0x1f5/0x3f0 [ 23.991371] do_mmap+0x854/0xf00 [ 23.991614] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.991892] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.992209] ksys_mmap_pgoff+0x3af/0x500 [ 23.992492] do_syscall_64+0x3f/0x90 [ 23.992759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.993114] RIP: 0033:0x7f84968e4d82 [ 23.993368] 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 [ 23.994530] RSP: 002b:00007fffbcc9d2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.995027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84968e4d82 [ 23.995496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8495d1e000 [ 23.995968] RBP: 00007f8495d1e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.996431] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598a3353b20 [ 23.996892] R13: 00007fffbcc9d2e0 R14: 00007fffbcc9d310 R15: 00007fffbcc9d670 [ 23.997359] </TASK> [ 23.997519] [ 23.997638] Allocated by task 211: [ 23.997872] kasan_save_stack+0x22/0x50 [ 23.998147] kasan_set_track+0x25/0x30 [ 23.998417] __kasan_slab_alloc+0x59/0x70 [ 23.998704] kmem_cache_alloc+0x16b/0x370 [ 23.998985] vm_area_dup+0x20/0x160 [ 23.999232] __split_vma+0x170/0x950 [ 23.999489] split_vma+0xc6/0x110 [ 23.999729] mprotect_fixup+0x8d2/0xb30 [ 24.000013] do_mprotect_pkey+0x87e/0xd40 [ 24.000297] __x64_sys_mprotect+0x78/0xc0 [ 24.000585] do_syscall_64+0x3f/0x90 [ 24.000847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.001203] [ 24.001321] Freed by task 19: [ 24.001533] kasan_save_stack+0x22/0x50 [ 24.001807] kasan_set_track+0x25/0x30 [ 24.002076] kasan_save_free_info+0x2b/0x50 [ 24.002370] __kasan_slab_free+0x10a/0x190 [ 24.002664] kmem_cache_free+0x10d/0x4d0 [ 24.002940] rcu_core+0x8c8/0x2860 [ 24.003184] __do_softirq+0x1b7/0x7d4 [ 24.003445] [ 24.003563] Last potentially related work creation: [ 24.003884] kasan_save_stack+0x22/0x50 [ 24.004172] __kasan_record_aux_stack+0x8e/0xa0 [ 24.004485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.004837] remove_vma+0x139/0x170 [ 24.005081] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.005383] do_vmi_munmap+0x1f1/0x2b0 [ 24.005646] __vm_munmap+0x138/0x3a0 [ 24.005900] __x64_sys_munmap+0x59/0x80 [ 24.006169] do_syscall_64+0x3f/0x90 [ 24.006428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.006778] [ 24.006894] The buggy address belongs to the object at ffff88801a3380e8 [ 24.006894] which belongs to the cache vm_area_struct of size 168 [ 24.007690] The buggy address is located 88 bytes inside of [ 24.007690] freed 168-byte region [ffff88801a3380e8, ffff88801a338190) [ 24.008463] [ 24.008582] The buggy address belongs to the physical page: [ 24.008942] page:0000000027f162c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a338 [ 24.009543] memcg:ffff88800d99af01 [ 24.009775] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.010126] page_type: 0xffffffff() [ 24.010372] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.010874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d99af01 [ 24.011364] page dumped because: kasan: bad access detected [ 24.011723] [ 24.011841] Memory state around the buggy address: [ 24.012156] ffff88801a338000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.012621] ffff88801a338080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.013087] >ffff88801a338100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.013547] ^ [ 24.013894] ffff88801a338180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.014357] ffff88801a338200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.014822] ================================================================== [ 24.015409] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.397227] BUG: Bad rss-counter state mm:000000006dbba6f8 type:MM_FILEPAGES val:33 [ 25.397815] BUG: Bad rss-counter state mm:000000006dbba6f8 type:MM_ANONPAGES val:22 [ 25.780180] BUG: Bad rss-counter state mm:00000000deb6e6b7 type:MM_FILEPAGES val:33 [ 25.780732] BUG: Bad rss-counter state mm:00000000deb6e6b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33038' (ECDSA) to the list of known hosts. 2023/06/20 14:52:56 fuzzer started 2023/06/20 14:52:56 dialing manager at localhost:36067 2023/06/20 14:52:56 checking machine... 2023/06/20 14:52:56 checking revisions... [ 26.443981] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:52:56 testing simple program... [ 26.507157] cgroup: Unknown subsys name 'net' [ 26.544207] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:52:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11002dfef11 RCX=ffffffff8366a567 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016ff7878 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888016eb7500 R13=ffff888016d81200 R14=0000000000000cc0 R15=ffff888008fae000 RIP=ffffffff814c0250 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 00007f72ecd5e900 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=00007fffdeb45000 CR3=000000000e60a000 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=000000000000506a RBX=0000000000000001 RCX=ffffffff81102613 RDX=000000000000000a RSI=ffffffff86091f84 RDI=ffffffff85d8eb6c RBP=ffff88806cf09af0 RSP=ffff88806cf09a18 R8 =ffffffff86091f84 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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=00007faed80ed8b0 CR3=0000000010014000 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=ba0886fa109c048ced4f26a9d0b26900 XMM02=000000000011c0a8eff9b2d0a8fce9cb XMM03=000000000011c1782c67c8bc2e329bc3 XMM04=dfbf136454a0d9bd00000000000ae988 XMM05=19e9129bd510f2350000000000132310 XMM06=0675a0c5ec8724be00000000001314e8 XMM07=e042d86d42eb936e0000000000122a20 XMM08=a9f377b3d278c67b000000000011c178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000