[ 35.074803] BUG: Bad rss-counter state mm:000000000a407d6d type:MM_FILEPAGES val:33 [ 35.076015] BUG: Bad rss-counter state mm:000000000a407d6d type:MM_ANONPAGES val:22 [ 35.241122] ================================================================== [ 35.242055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.242999] Read of size 8 at addr ffff88801a21e4e0 by task sshd/219 [ 35.243789] [ 35.244104] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.244974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.245977] Call Trace: [ 35.246299] [ 35.246588] dump_stack_lvl+0x91/0xf0 [ 35.247075] print_report+0xcc/0x620 [ 35.247566] ? __virt_addr_valid+0x102/0x340 [ 35.248130] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.248760] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.249389] kasan_report+0xbe/0xf0 [ 35.249871] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.250501] vma_interval_tree_remove+0xc75/0xec0 [ 35.251111] vma_prepare+0xc54/0x11a0 [ 35.251601] __split_vma+0x5af/0x950 [ 35.252083] ? __pfx___split_vma+0x10/0x10 [ 35.252626] ? find_held_lock+0x2c/0x110 [ 35.253155] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.253727] ? lock_is_held_type+0x9f/0x120 [ 35.254270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.254889] ? mtree_range_walk+0x632/0x900 [ 35.255442] ? mas_walk+0x5c7/0x7c0 [ 35.255920] do_vmi_munmap+0x1f1/0x2b0 [ 35.256413] mmap_region+0x1f9/0x2660 [ 35.256904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.257432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.258146] ? __pfx_lock_acquire+0x10/0x10 [ 35.258686] ? __pfx_mmap_region+0x10/0x10 [ 35.259221] ? security_mmap_addr+0x7d/0xa0 [ 35.259756] ? get_unmapped_area+0x1f5/0x3f0 [ 35.260311] do_mmap+0x854/0xf00 [ 35.260755] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.261260] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.261829] ksys_mmap_pgoff+0x3af/0x500 [ 35.262338] do_syscall_64+0x3f/0x90 [ 35.262824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.263472] RIP: 0033:0x7fcfdefc1d82 [ 35.263929] 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 [ 35.266072] RSP: 002b:00007fff04081f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.266983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcfdefc1d82 [ 35.267842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcfde3fb000 [ 35.268695] RBP: 00007fcfde3fb000 R08: 0000000000000009 R09: 0000000000001000 [ 35.269557] R10: 0000000000000812 R11: 0000000000000206 R12: 000056128a79cec0 [ 35.270399] R13: 00007fff04081f90 R14: 00007fff04081fc0 R15: 00007fff04082320 [ 35.271254] [ 35.271550] [ 35.271766] Allocated by task 208: [ 35.272192] kasan_save_stack+0x22/0x50 [ 35.272704] kasan_set_track+0x25/0x30 [ 35.273203] __kasan_slab_alloc+0x59/0x70 [ 35.273754] kmem_cache_alloc+0x16b/0x370 [ 35.274271] vm_area_dup+0x20/0x160 [ 35.274731] __split_vma+0x170/0x950 [ 35.275202] split_vma+0xc6/0x110 [ 35.275654] mprotect_fixup+0x8d2/0xb30 [ 35.276160] do_mprotect_pkey+0x87e/0xd40 [ 35.276685] __x64_sys_mprotect+0x78/0xc0 [ 35.277210] do_syscall_64+0x3f/0x90 [ 35.277698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.278356] [ 35.278578] Freed by task 208: [ 35.278973] kasan_save_stack+0x22/0x50 [ 35.279479] kasan_set_track+0x25/0x30 [ 35.279968] kasan_save_free_info+0x2b/0x50 [ 35.280502] __kasan_slab_free+0x10a/0x190 [ 35.281033] kmem_cache_free+0x10d/0x4d0 [ 35.281553] rcu_core+0x8c8/0x2860 [ 35.281997] __do_softirq+0x1b7/0x7d4 [ 35.282480] [ 35.282698] Last potentially related work creation: [ 35.283280] kasan_save_stack+0x22/0x50 [ 35.283783] __kasan_record_aux_stack+0x8e/0xa0 [ 35.284357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.285008] remove_vma+0x139/0x170 [ 35.285473] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.286067] do_vmi_munmap+0x1f1/0x2b0 [ 35.286569] __vm_munmap+0x138/0x3a0 [ 35.287049] __x64_sys_munmap+0x59/0x80 [ 35.287555] do_syscall_64+0x3f/0x90 [ 35.288033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.288708] [ 35.288929] The buggy address belongs to the object at ffff88801a21e488 [ 35.288929] which belongs to the cache vm_area_struct of size 168 [ 35.290450] The buggy address is located 88 bytes inside of [ 35.290450] freed 168-byte region [ffff88801a21e488, ffff88801a21e530) [ 35.291889] [ 35.292111] The buggy address belongs to the physical page: [ 35.292783] page:00000000b8b6ba82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a21e [ 35.293901] memcg:ffff88801a211401 [ 35.294329] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.294984] page_type: 0xffffffff() [ 35.295440] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.296366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a211401 [ 35.297289] page dumped because: kasan: bad access detected [ 35.297954] [ 35.298170] Memory state around the buggy address: [ 35.298757] ffff88801a21e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.299622] ffff88801a21e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.300500] >ffff88801a21e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.301383] ^ [ 35.302148] ffff88801a21e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.303019] ffff88801a21e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.304005] ================================================================== [ 35.304992] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.096361] BUG: Bad rss-counter state mm:000000000e9f3ce4 type:MM_FILEPAGES val:33 [ 38.097559] BUG: Bad rss-counter state mm:000000000e9f3ce4 type:MM_ANONPAGES val:22 [ 38.509439] BUG: Bad rss-counter state mm:0000000041950c46 type:MM_FILEPAGES val:33 [ 38.510433] BUG: Bad rss-counter state mm:0000000041950c46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58740' (ECDSA) to the list of known hosts. 2023/06/19 18:52:02 fuzzer started 2023/06/19 18:52:03 dialing manager at localhost:44161 2023/06/19 18:52:03 checking machine... 2023/06/19 18:52:03 checking revisions... [ 39.241586] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:52:03 testing simple program... [ 39.286498] cgroup: Unknown subsys name 'net' [ 39.356606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:58 Registers: info registers vcpu 0 RAX=ffff888006850001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800684ff01 RSI=ffff88800684ff18 RDI=ffff88800684faa8 RBP=ffff88800684ff18 RSP=ffff88800684fa00 R8 =0000000000000001 R9 =ffff88800684fad8 R10=0000000000038001 R11=000000000001047e R12=0000000000000008 R13=ffff888006848000 R14=ffff88800684ff18 R15=ffff88800684fa98 RIP=ffffffff811304ce RFL=00000282 [--S----] 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 00007f8231c7b900 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=00007ffe0f0c1000 CR3=0000000008dce000 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=ffff88806cf0a000 RBX=ffff88806cf09e30 RCX=0000000000000001 RDX=ffff88806cf09e38 RSI=ffff88806cf09e10 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e10 R15=ffff88806cf09a98 RIP=ffffffff81131296 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=00007f587a024400 CR3=000000000c98c000 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=ed6a1e7258df9788b84d80743aa44e51 XMM02=2c67c8bc2e329bc3000000000011d228 XMM03=fb795ef6d65770560000000000122f38 XMM04=b36e58188180665500000000000ae988 XMM05=dfcdbad4f1609c370000000000133458 XMM06=0ecbeb14cf61aee00000000000132630 XMM07=e042d86d42eb936e0000000000123210 XMM08=e5de045986e217ac000000000011d288 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000