[ 31.967832] BUG: Bad rss-counter state mm:000000001adf4cb7 type:MM_FILEPAGES val:33 [ 31.969613] BUG: Bad rss-counter state mm:000000001adf4cb7 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.136522] ================================================================== [ 32.137603] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.138748] Read of size 8 at addr ffff88800946b228 by task sshd/218 [ 32.139708] [ 32.139929] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.140819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.141825] Call Trace: [ 32.142147] [ 32.142439] dump_stack_lvl+0x91/0xf0 [ 32.142960] print_report+0xcc/0x620 [ 32.143449] ? __virt_addr_valid+0x102/0x340 [ 32.144008] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.144654] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.145276] kasan_report+0xbe/0xf0 [ 32.145766] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.146399] vma_interval_tree_remove+0xc75/0xec0 [ 32.147018] vma_prepare+0xc54/0x11a0 [ 32.147507] __split_vma+0x5af/0x950 [ 32.147983] ? __pfx___split_vma+0x10/0x10 [ 32.148515] ? find_held_lock+0x2c/0x110 [ 32.149044] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.149619] ? lock_is_held_type+0x9f/0x120 [ 32.150166] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.150792] ? mtree_range_walk+0x632/0x900 [ 32.151357] ? mas_walk+0x5c7/0x7c0 [ 32.151845] do_vmi_munmap+0x1f1/0x2b0 [ 32.152350] mmap_region+0x1f9/0x2660 [ 32.152846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.153357] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.154091] ? __pfx_lock_acquire+0x10/0x10 [ 32.154646] ? __pfx_mmap_region+0x10/0x10 [ 32.155189] ? security_mmap_addr+0x7d/0xa0 [ 32.155739] ? get_unmapped_area+0x1f5/0x3f0 [ 32.156300] do_mmap+0x854/0xf00 [ 32.156752] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.157261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.157840] ksys_mmap_pgoff+0x3af/0x500 [ 32.158353] do_syscall_64+0x3f/0x90 [ 32.158843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.159507] RIP: 0033:0x7f13603dfd82 [ 32.159979] 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 [ 32.162145] RSP: 002b:00007ffe85bad3f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.163076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13603dfd82 [ 32.163935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f135f819000 [ 32.164793] RBP: 00007f135f819000 R08: 0000000000000009 R09: 0000000000001000 [ 32.165644] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590aa205f70 [ 32.166502] R13: 00007ffe85bad410 R14: 00007ffe85bad440 R15: 00007ffe85bad7a0 [ 32.167390] [ 32.167684] [ 32.167906] Allocated by task 211: [ 32.168343] kasan_save_stack+0x22/0x50 [ 32.168853] kasan_set_track+0x25/0x30 [ 32.169352] __kasan_slab_alloc+0x59/0x70 [ 32.169879] kmem_cache_alloc+0x16b/0x370 [ 32.170401] vm_area_dup+0x20/0x160 [ 32.170877] __split_vma+0x170/0x950 [ 32.171353] split_vma+0xc6/0x110 [ 32.171804] mprotect_fixup+0x8d2/0xb30 [ 32.172312] do_mprotect_pkey+0x87e/0xd40 [ 32.172837] __x64_sys_mprotect+0x78/0xc0 [ 32.173364] do_syscall_64+0x3f/0x90 [ 32.173843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.174496] [ 32.174724] Freed by task 211: [ 32.175117] kasan_save_stack+0x22/0x50 [ 32.175631] kasan_set_track+0x25/0x30 [ 32.176137] kasan_save_free_info+0x2b/0x50 [ 32.176678] __kasan_slab_free+0x10a/0x190 [ 32.177220] kmem_cache_free+0x10d/0x4d0 [ 32.177739] rcu_core+0x8c8/0x2860 [ 32.178188] __do_softirq+0x1b7/0x7d4 [ 32.178689] [ 32.178908] Last potentially related work creation: [ 32.179507] kasan_save_stack+0x22/0x50 [ 32.180015] __kasan_record_aux_stack+0x8e/0xa0 [ 32.180602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.181256] remove_vma+0x139/0x170 [ 32.181717] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.182280] do_vmi_munmap+0x1f1/0x2b0 [ 32.182779] __vm_munmap+0x138/0x3a0 [ 32.183246] __x64_sys_munmap+0x59/0x80 [ 32.183754] do_syscall_64+0x3f/0x90 [ 32.184232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.184892] [ 32.185113] Second to last potentially related work creation: [ 32.185817] kasan_save_stack+0x22/0x50 [ 32.186323] __kasan_record_aux_stack+0x8e/0xa0 [ 32.186918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.187567] remove_vma+0x139/0x170 [ 32.188018] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.188590] do_vmi_munmap+0x1f1/0x2b0 [ 32.189084] mmap_region+0x1f9/0x2660 [ 32.189565] do_mmap+0x854/0xf00 [ 32.190009] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.190508] ksys_mmap_pgoff+0x7d/0x500 [ 32.191014] do_syscall_64+0x3f/0x90 [ 32.191489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.192138] [ 32.192355] The buggy address belongs to the object at ffff88800946b1d0 [ 32.192355] which belongs to the cache vm_area_struct of size 168 [ 32.193839] The buggy address is located 88 bytes inside of [ 32.193839] freed 168-byte region [ffff88800946b1d0, ffff88800946b278) [ 32.195269] [ 32.195490] The buggy address belongs to the physical page: [ 32.196158] page:0000000047f3048d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x946b [ 32.197243] memcg:ffff88800e530801 [ 32.197677] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.198332] page_type: 0xffffffff() [ 32.198800] raw: 0100000000000200 ffff8880087a0c80 ffffea000059f000 dead000000000008 [ 32.199725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e530801 [ 32.200645] page dumped because: kasan: bad access detected [ 32.201325] [ 32.201543] Memory state around the buggy address: [ 32.202130] ffff88800946b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.203009] ffff88800946b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.203869] >ffff88800946b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.204739] ^ [ 32.205306] ffff88800946b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.206165] ffff88800946b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.207048] ================================================================== [ 32.208023] Disabling lock debugging due to kernel taint [ 34.355603] BUG: Bad rss-counter state mm:000000001973afdb type:MM_FILEPAGES val:33 [ 34.356765] BUG: Bad rss-counter state mm:000000001973afdb type:MM_ANONPAGES val:22 [ 34.743009] BUG: Bad rss-counter state mm:000000009cfed53c type:MM_FILEPAGES val:33 [ 34.744016] BUG: Bad rss-counter state mm:000000009cfed53c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4834' (ECDSA) to the list of known hosts. 2023/06/20 21:49:05 fuzzer started 2023/06/20 21:49:06 dialing manager at localhost:36067 2023/06/20 21:49:06 checking machine... 2023/06/20 21:49:06 checking revisions... [ 35.460439] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:49:06 testing simple program... [ 35.508995] cgroup: Unknown subsys name 'net' [ 35.552329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:05 Registers: info registers vcpu 0 RAX=ffffffff8185af63 RBX=ffffffff85e03b24 RCX=ffffffff8185af32 RDX=0000000000000000 RSI=ffffffff86141712 RDI=ffffffff85e03b20 RBP=ffffffff85e03b24 RSP=ffff8880198df920 R8 =ffffffff86141712 R9 =ffff8880198dfa18 R10=0000000000038001 R11=0000000000022457 R12=ffffffff85e03b24 R13=ffffffff85e03b20 R14=ffffffff85e03b20 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000297 [--S-APC] 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 00007fe6daac2900 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=00007fff7c13b000 CR3=000000000e32c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ff58c5fea10 CR3=0000000010246000 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=2035303a39343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000