[ 30.620075] BUG: Bad rss-counter state mm:00000000fffbf594 type:MM_FILEPAGES val:33 [ 30.621498] BUG: Bad rss-counter state mm:00000000fffbf594 type:MM_ANONPAGES val:22 [ 30.734672] ================================================================== [ 30.735785] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736930] Read of size 8 at addr ffff88801a3b6d08 by task sshd/220 [ 30.737953] [ 30.738194] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.738817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.739519] Call Trace: [ 30.739760] [ 30.739966] dump_stack_lvl+0x91/0xf0 [ 30.740320] print_report+0xcc/0x620 [ 30.740672] ? __virt_addr_valid+0x102/0x340 [ 30.741069] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741515] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741958] kasan_report+0xbe/0xf0 [ 30.742300] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742741] vma_interval_tree_remove+0xc75/0xec0 [ 30.743174] vma_prepare+0xc54/0x11a0 [ 30.743523] __split_vma+0x5af/0x950 [ 30.743889] ? __pfx___split_vma+0x10/0x10 [ 30.744272] ? find_held_lock+0x2c/0x110 [ 30.744650] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.745056] ? lock_is_held_type+0x9f/0x120 [ 30.745439] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.745871] ? mtree_range_walk+0x632/0x900 [ 30.746272] ? mas_walk+0x5c7/0x7c0 [ 30.746613] do_vmi_munmap+0x1f1/0x2b0 [ 30.746971] mmap_region+0x1f9/0x2660 [ 30.747319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.747699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.748215] ? __pfx_lock_acquire+0x10/0x10 [ 30.748599] ? __pfx_mmap_region+0x10/0x10 [ 30.748976] ? security_mmap_addr+0x7d/0xa0 [ 30.749354] ? get_unmapped_area+0x1f5/0x3f0 [ 30.749750] do_mmap+0x854/0xf00 [ 30.750063] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.750415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.750818] ksys_mmap_pgoff+0x3af/0x500 [ 30.751182] do_syscall_64+0x3f/0x90 [ 30.751524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.752001] RIP: 0033:0x7fb620eefd82 [ 30.752328] 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 [ 30.753850] RSP: 002b:00007fff946631d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.754499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb620eefd82 [ 30.755100] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb620329000 [ 30.755706] RBP: 00007fb620329000 R08: 0000000000000009 R09: 0000000000001000 [ 30.756314] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba69205b20 [ 30.756914] R13: 00007fff946631f0 R14: 00007fff94663220 R15: 00007fff94663580 [ 30.757530] [ 30.757738] [ 30.757890] Allocated by task 213: [ 30.758199] kasan_save_stack+0x22/0x50 [ 30.758563] kasan_set_track+0x25/0x30 [ 30.758917] __kasan_slab_alloc+0x59/0x70 [ 30.759300] kmem_cache_alloc+0x16b/0x370 [ 30.759679] vm_area_dup+0x20/0x160 [ 30.760020] __split_vma+0x170/0x950 [ 30.760359] split_vma+0xc6/0x110 [ 30.760681] mprotect_fixup+0x8d2/0xb30 [ 30.761066] do_mprotect_pkey+0x87e/0xd40 [ 30.761452] __x64_sys_mprotect+0x78/0xc0 [ 30.761839] do_syscall_64+0x3f/0x90 [ 30.762188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762671] [ 30.762825] Freed by task 204: [ 30.763114] kasan_save_stack+0x22/0x50 [ 30.763493] kasan_set_track+0x25/0x30 [ 30.763873] kasan_save_free_info+0x2b/0x50 [ 30.764255] __kasan_slab_free+0x10a/0x190 [ 30.764637] kmem_cache_free+0x10d/0x4d0 [ 30.765000] rcu_core+0x8c8/0x2860 [ 30.765316] __do_softirq+0x1b7/0x7d4 [ 30.765662] [ 30.765814] Last potentially related work creation: [ 30.766237] kasan_save_stack+0x22/0x50 [ 30.766594] __kasan_record_aux_stack+0x8e/0xa0 [ 30.767006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.767478] remove_vma+0x139/0x170 [ 30.767820] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.768219] do_vmi_munmap+0x1f1/0x2b0 [ 30.768570] __vm_munmap+0x138/0x3a0 [ 30.768903] __x64_sys_munmap+0x59/0x80 [ 30.769258] do_syscall_64+0x3f/0x90 [ 30.769593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770049] [ 30.770203] The buggy address belongs to the object at ffff88801a3b6cb0 [ 30.770203] which belongs to the cache vm_area_struct of size 168 [ 30.771297] The buggy address is located 88 bytes inside of [ 30.771297] freed 168-byte region [ffff88801a3b6cb0, ffff88801a3b6d58) [ 30.772314] [ 30.772470] The buggy address belongs to the physical page: [ 30.772938] page:00000000aefb66fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3b6 [ 30.773727] memcg:ffff888015fe1b01 [ 30.774032] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.774497] page_type: 0xffffffff() [ 30.774821] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.775473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fe1b01 [ 30.776139] page dumped because: kasan: bad access detected [ 30.776617] [ 30.776770] Memory state around the buggy address: [ 30.777202] ffff88801a3b6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.777848] ffff88801a3b6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.778544] >ffff88801a3b6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.779179] ^ [ 30.779503] ffff88801a3b6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.780141] ffff88801a3b6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.780749] ================================================================== [ 30.781458] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.148974] BUG: Bad rss-counter state mm:000000000e35d689 type:MM_FILEPAGES val:33 [ 33.150271] BUG: Bad rss-counter state mm:000000000e35d689 type:MM_ANONPAGES val:22 [ 33.615590] BUG: Bad rss-counter state mm:00000000716b7dcc type:MM_FILEPAGES val:33 [ 33.616728] BUG: Bad rss-counter state mm:00000000716b7dcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25907' (ECDSA) to the list of known hosts. 2023/06/21 04:42:02 fuzzer started 2023/06/21 04:42:02 dialing manager at localhost:36067 2023/06/21 04:42:02 checking machine... 2023/06/21 04:42:02 checking revisions... [ 34.395739] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:42:02 testing simple program... [ 34.445810] cgroup: Unknown subsys name 'net' [ 34.487500] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:42:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e69ea00 RCX=0000000000000000 RDX=ffff888017e59b40 RSI=ffffffff81efe88a RDI=0000000000000005 RBP=ffff88801b085bd8 RSP=ffff888017c6f9b0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000040002 R13=1ffff11002f8df37 R14=000000000000ef53 R15=ffff88800e69eb98 RIP=ffffffff81f1a8f6 RFL=00000293 [--S-A-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 00007f3ae9737900 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=00007ffcbe4d0000 CR3=0000000015e58000 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=dffffc0000000000 RBX=ffff888008e07f58 RCX=0000000000000001 RDX=1ffff1100d9e1354 RSI=ffff888008e07f48 RDI=ffff88806cf09aa8 RBP=ffff888008e00000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e07f48 R15=ffff88806cf09a98 RIP=ffffffff81131c91 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 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=00007ff88c2b8f00 CR3=000000000dd7e000 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=2031303a32343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a32343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000