[ 38.937828] BUG: Bad rss-counter state mm:000000008f16c8d2 type:MM_FILEPAGES val:33 [ 38.938523] BUG: Bad rss-counter state mm:000000008f16c8d2 type:MM_ANONPAGES val:22 [ 39.107363] ================================================================== [ 39.107957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.108670] Read of size 8 at addr ffff88800da175c8 by task sshd/223 [ 39.109181] [ 39.109328] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.109880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.110511] Call Trace: [ 39.110721] [ 39.110911] dump_stack_lvl+0x91/0xf0 [ 39.111239] print_report+0xcc/0x620 [ 39.111557] ? __virt_addr_valid+0x102/0x340 [ 39.111919] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.112329] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.112753] kasan_report+0xbe/0xf0 [ 39.113050] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.113447] vma_interval_tree_remove+0xc75/0xec0 [ 39.113846] vma_prepare+0xc54/0x11a0 [ 39.114164] __split_vma+0x5af/0x950 [ 39.114479] ? __pfx___split_vma+0x10/0x10 [ 39.114830] ? find_held_lock+0x2c/0x110 [ 39.115179] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.115554] ? lock_is_held_type+0x9f/0x120 [ 39.115913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.116319] ? mtree_range_walk+0x632/0x900 [ 39.116708] ? mas_walk+0x5c7/0x7c0 [ 39.117026] do_vmi_munmap+0x1f1/0x2b0 [ 39.117356] mmap_region+0x1f9/0x2660 [ 39.117676] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.118019] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.118488] ? __pfx_lock_acquire+0x10/0x10 [ 39.118841] ? __pfx_mmap_region+0x10/0x10 [ 39.119199] ? security_mmap_addr+0x7d/0xa0 [ 39.119549] ? get_unmapped_area+0x1f5/0x3f0 [ 39.119910] do_mmap+0x854/0xf00 [ 39.120204] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.120533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.121581] ksys_mmap_pgoff+0x3af/0x500 [ 39.121918] do_syscall_64+0x3f/0x90 [ 39.122288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.122716] RIP: 0033:0x7ff0bd5ecd82 [ 39.123018] 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 [ 39.124516] RSP: 002b:00007ffcab9ae1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.125199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0bd5ecd82 [ 39.125746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0bca26000 [ 39.126335] RBP: 00007ff0bca26000 R08: 0000000000000009 R09: 0000000000001000 [ 39.126872] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592607eeec0 [ 39.127458] R13: 00007ffcab9ae210 R14: 00007ffcab9ae240 R15: 00007ffcab9ae5a0 [ 39.128012] [ 39.128256] [ 39.128402] Allocated by task 213: [ 39.128703] kasan_save_stack+0x22/0x50 [ 39.129039] kasan_set_track+0x25/0x30 [ 39.129459] __kasan_slab_alloc+0x59/0x70 [ 39.129806] kmem_cache_alloc+0x16b/0x370 [ 39.130195] vm_area_dup+0x20/0x160 [ 39.130499] __split_vma+0x170/0x950 [ 39.130807] split_vma+0xc6/0x110 [ 39.131143] mprotect_fixup+0x8d2/0xb30 [ 39.131474] do_mprotect_pkey+0x87e/0xd40 [ 39.131816] __x64_sys_mprotect+0x78/0xc0 [ 39.132207] do_syscall_64+0x3f/0x90 [ 39.132521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.132995] [ 39.133189] Freed by task 213: [ 39.133447] kasan_save_stack+0x22/0x50 [ 39.133778] kasan_set_track+0x25/0x30 [ 39.134186] kasan_save_free_info+0x2b/0x50 [ 39.134541] __kasan_slab_free+0x10a/0x190 [ 39.134893] kmem_cache_free+0x10d/0x4d0 [ 39.135274] rcu_core+0x8c8/0x2860 [ 39.135572] __do_softirq+0x1b7/0x7d4 [ 39.135890] [ 39.136035] Last potentially related work creation: [ 39.136460] kasan_save_stack+0x22/0x50 [ 39.136819] __kasan_record_aux_stack+0x8e/0xa0 [ 39.137240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.137661] remove_vma+0x139/0x170 [ 39.137959] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.138376] do_vmi_munmap+0x1f1/0x2b0 [ 39.138699] __vm_munmap+0x138/0x3a0 [ 39.139008] __x64_sys_munmap+0x59/0x80 [ 39.139416] do_syscall_64+0x3f/0x90 [ 39.139732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.140205] [ 39.140350] The buggy address belongs to the object at ffff88800da17570 [ 39.140350] which belongs to the cache vm_area_struct of size 168 [ 39.141356] The buggy address is located 88 bytes inside of [ 39.141356] freed 168-byte region [ffff88800da17570, ffff88800da17618) [ 39.142299] [ 39.142445] The buggy address belongs to the physical page: [ 39.142876] page:000000003dc99fed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda17 [ 39.143628] memcg:ffff88800e03c601 [ 39.143911] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.144418] page_type: 0xffffffff() [ 39.144743] raw: 0100000000000200 ffff88800879fc80 ffffea0000363f40 dead00000000000c [ 39.145388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e03c601 [ 39.145969] page dumped because: kasan: bad access detected [ 39.146450] [ 39.146592] Memory state around the buggy address: [ 39.146971] ffff88800da17480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.147571] ffff88800da17500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.148169] >ffff88800da17580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.148737] ^ [ 39.149250] ffff88800da17600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.149800] ffff88800da17680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.150394] ================================================================== [ 39.168959] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.584689] BUG: Bad rss-counter state mm:00000000a56f6e8f type:MM_FILEPAGES val:33 [ 41.585621] BUG: Bad rss-counter state mm:00000000a56f6e8f type:MM_ANONPAGES val:22 [ 43.133519] BUG: Bad rss-counter state mm:00000000a09f47b9 type:MM_FILEPAGES val:33 [ 43.134224] BUG: Bad rss-counter state mm:00000000a09f47b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7596' (ECDSA) to the list of known hosts. 2023/06/20 08:19:11 fuzzer started 2023/06/20 08:19:11 dialing manager at localhost:44161 2023/06/20 08:19:11 checking machine... 2023/06/20 08:19:11 checking revisions... [ 44.203948] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:19:11 testing simple program... [ 44.275004] cgroup: Unknown subsys name 'net' [ 44.335639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:19:11 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff818105a7 RSP=ffff888016e1fb98 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffffea000035de40 R14=ffffffff811654d8 R15=ffff8880094f2a80 RIP=ffffffff8153437e RFL=00000247 [---Z-PC] 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=00007f60e9eb2020 CR3=000000000ca6e000 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=d308ea1db4f6258c5f4650a27b1e90ba XMM02=000000000013427800c3ffa147b8d857 XMM03=00000000001351c81319e678c5640f8a XMM04=23cbb4948510de2800000000000ae988 XMM05=a4e6daab2e8878b400000000001351c8 XMM06=59d5b690e0af863b0000000000134278 XMM07=139997807ff5a4420000000000125a10 XMM08=e1353cc91df538a70000000000125020 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000557ccd337da0 RBX=0000000000000000 RCX=0000000000000110 RDX=0000000000000020 RSI=000000000003e000 RDI=000000000000001f RBP=0000000000000110 RSP=00007fff7b3cc7b0 R8 =0000000000000000 R9 =00007f6fb109cbe0 R10=0000557ccd337eb0 R11=0000000000000000 R12=00007f6fb109cb80 R13=0000557ccd308010 R14=fffffffffffffe28 R15=00007f6fb109cce0 RIP=00007f6fb0f669e7 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6fb0aea900 00000000 00000000 GS =0000 0000000000000000 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=0000557ccd32bf20 CR3=000000000fd60000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000