[ 24.042992] BUG: Bad rss-counter state mm:00000000705a292f type:MM_FILEPAGES val:33 [ 24.044027] BUG: Bad rss-counter state mm:00000000705a292f type:MM_ANONPAGES val:22 [ 24.209424] ================================================================== [ 24.210660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.211740] Read of size 8 at addr ffff88800e154968 by task sshd/219 [ 24.212618] [ 24.212831] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.213728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.214876] Call Trace: [ 24.215291] [ 24.215642] dump_stack_lvl+0x91/0xf0 [ 24.216228] print_report+0xcc/0x620 [ 24.216729] ? __virt_addr_valid+0x102/0x340 [ 24.217246] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.217828] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.218418] kasan_report+0xbe/0xf0 [ 24.218880] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.219528] vma_interval_tree_remove+0xc75/0xec0 [ 24.220239] vma_prepare+0xc54/0x11a0 [ 24.220802] __split_vma+0x5af/0x950 [ 24.221360] ? __pfx___split_vma+0x10/0x10 [ 24.221984] ? find_held_lock+0x2c/0x110 [ 24.222597] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.223268] ? lock_is_held_type+0x9f/0x120 [ 24.223904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.224606] ? mtree_range_walk+0x632/0x900 [ 24.225255] ? mas_walk+0x5c7/0x7c0 [ 24.225812] do_vmi_munmap+0x1f1/0x2b0 [ 24.226391] mmap_region+0x1f9/0x2660 [ 24.226952] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.227608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.228447] ? __pfx_lock_acquire+0x10/0x10 [ 24.229076] ? __pfx_mmap_region+0x10/0x10 [ 24.229701] ? security_mmap_addr+0x7d/0xa0 [ 24.230330] ? get_unmapped_area+0x1f5/0x3f0 [ 24.230978] do_mmap+0x854/0xf00 [ 24.231505] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.232084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.232742] ksys_mmap_pgoff+0x3af/0x500 [ 24.233341] do_syscall_64+0x3f/0x90 [ 24.233906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.234659] RIP: 0033:0x7fd3155aed82 [ 24.235207] 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 [ 24.237765] RSP: 002b:00007fff8b102c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.238962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3155aed82 [ 24.240036] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3149e8000 [ 24.240975] RBP: 00007fd3149e8000 R08: 0000000000000009 R09: 0000000000001000 [ 24.241918] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecf3a3fec0 [ 24.242924] R13: 00007fff8b102c80 R14: 00007fff8b102cb0 R15: 00007fff8b103010 [ 24.243945] [ 24.244289] [ 24.244540] Allocated by task 212: [ 24.245044] kasan_save_stack+0x22/0x50 [ 24.245638] kasan_set_track+0x25/0x30 [ 24.246218] __kasan_slab_alloc+0x59/0x70 [ 24.246836] kmem_cache_alloc+0x16b/0x370 [ 24.247461] vm_area_dup+0x20/0x160 [ 24.248054] __split_vma+0x170/0x950 [ 24.248698] split_vma+0xc6/0x110 [ 24.249301] mprotect_fixup+0x8d2/0xb30 [ 24.249993] do_mprotect_pkey+0x87e/0xd40 [ 24.250706] __x64_sys_mprotect+0x78/0xc0 [ 24.251441] do_syscall_64+0x3f/0x90 [ 24.252087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.252962] [ 24.253232] Freed by task 203: [ 24.253747] kasan_save_stack+0x22/0x50 [ 24.254307] kasan_set_track+0x25/0x30 [ 24.254854] kasan_save_free_info+0x2b/0x50 [ 24.255471] __kasan_slab_free+0x10a/0x190 [ 24.256122] kmem_cache_free+0x10d/0x4d0 [ 24.256703] rcu_core+0x8c8/0x2860 [ 24.257196] __do_softirq+0x1b7/0x7d4 [ 24.257726] [ 24.257964] Last potentially related work creation: [ 24.258610] kasan_save_stack+0x22/0x50 [ 24.259180] __kasan_record_aux_stack+0x8e/0xa0 [ 24.259821] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.260539] remove_vma+0x139/0x170 [ 24.261040] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.261659] do_vmi_munmap+0x1f1/0x2b0 [ 24.262197] __vm_munmap+0x138/0x3a0 [ 24.262717] __x64_sys_munmap+0x59/0x80 [ 24.263272] do_syscall_64+0x3f/0x90 [ 24.263806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.264521] [ 24.264759] Second to last potentially related work creation: [ 24.265519] kasan_save_stack+0x22/0x50 [ 24.266082] __kasan_record_aux_stack+0x8e/0xa0 [ 24.266719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.267445] remove_vma+0x139/0x170 [ 24.267951] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.268574] do_vmi_munmap+0x1f1/0x2b0 [ 24.269116] mmap_region+0x1f9/0x2660 [ 24.269644] do_mmap+0x854/0xf00 [ 24.270122] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.270664] ksys_mmap_pgoff+0x3af/0x500 [ 24.271223] do_syscall_64+0x3f/0x90 [ 24.271750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.272460] [ 24.272700] The buggy address belongs to the object at ffff88800e154910 [ 24.272700] which belongs to the cache vm_area_struct of size 168 [ 24.274319] The buggy address is located 88 bytes inside of [ 24.274319] freed 168-byte region [ffff88800e154910, ffff88800e1549b8) [ 24.275922] [ 24.276170] The buggy address belongs to the physical page: [ 24.276932] page:0000000082b12c60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe154 [ 24.278200] memcg:ffff88800d881501 [ 24.278692] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.279452] page_type: 0xffffffff() [ 24.279974] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395cc0 dead000000000008 [ 24.281043] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d881501 [ 24.282093] page dumped because: kasan: bad access detected [ 24.282849] [ 24.283099] Memory state around the buggy address: [ 24.283767] ffff88800e154800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.284757] ffff88800e154880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.285732] >ffff88800e154900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.286731] ^ [ 24.287650] ffff88800e154980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.288640] ffff88800e154a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.289624] ================================================================== [ 24.290737] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.550913] BUG: Bad rss-counter state mm:00000000fe5817aa type:MM_FILEPAGES val:33 [ 26.552295] BUG: Bad rss-counter state mm:00000000fe5817aa type:MM_ANONPAGES val:22 [ 26.899270] BUG: Bad rss-counter state mm:0000000015c449fc type:MM_FILEPAGES val:33 [ 26.900434] BUG: Bad rss-counter state mm:0000000015c449fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25377' (ECDSA) to the list of known hosts. 2023/06/20 23:12:55 fuzzer started 2023/06/20 23:12:56 dialing manager at localhost:36067 2023/06/20 23:12:56 checking machine... 2023/06/20 23:12:56 checking revisions... [ 27.548391] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:12:56 testing simple program... [ 27.606350] cgroup: Unknown subsys name 'net' [ 27.675476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:55 Registers: info registers vcpu 0 RAX=00000000000066e1 RBX=ffffffff85618108 RCX=1ffffffff0ba7c92 RDX=1ffffffff0ac3021 RSI=0000000000000004 RDI=ffffffff85618108 RBP=ffff888008d91b40 RSP=ffff888008da7d58 R8 =0000000000000001 R9 =ffffed10011b4f9f R10=0000000000000003 R11=0000000000000000 R12=ffffed10011b2368 R13=ffff88806cf35000 R14=0000000000000000 R15=ffffffff85d3e490 RIP=ffffffff8135c3ae RFL=00000082 [--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 0000000000000000 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=00007f6de7f71000 CR3=000000000d5ec000 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=ace5c5254b83edb73b45e13a07f99c5f XMM02=eff9b2d0a8fce9cb000000000011b310 XMM03=2c67c8bc2e329bc3000000000011b438 XMM04=0f957e0a916c312200000000000ae988 XMM05=4b87fcd2d6e7b9710000000000133d68 XMM06=806171799158d9670000000000132518 XMM07=fb795ef6d65770560000000000121720 XMM08=2c67c8bc2e329bc3000000000011b438 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff8880183a8000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000001000 RDI=ffff8880183a8000 RBP=ffff888016a4f910 RSP=ffff888016a4f8b0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880183a8000 R13=ffff88801a0ed1c0 R14=ffffffff8367562f R15=00000000000000a4 RIP=ffffffff812c9518 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 00007fdb69667900 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=00007fdb69c1e618 CR3=000000000f5cc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000