[ 24.163904] BUG: Bad rss-counter state mm:000000008b99b661 type:MM_FILEPAGES val:33 [ 24.164581] BUG: Bad rss-counter state mm:000000008b99b661 type:MM_ANONPAGES val:22 [ 24.196476] ================================================================== [ 24.197113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.197757] Read of size 8 at addr ffff88800904f228 by task sshd/218 [ 24.198281] [ 24.198427] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.199167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.199848] Call Trace: [ 24.200068] [ 24.200260] dump_stack_lvl+0x91/0xf0 [ 24.200606] print_report+0xcc/0x620 [ 24.200950] ? __virt_addr_valid+0x102/0x340 [ 24.201324] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.201751] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.202171] kasan_report+0xbe/0xf0 [ 24.202492] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.202912] vma_interval_tree_remove+0xc75/0xec0 [ 24.203324] vma_prepare+0xc54/0x11a0 [ 24.203693] __split_vma+0x5af/0x950 [ 24.204010] ? __pfx___split_vma+0x10/0x10 [ 24.204383] ? find_held_lock+0x2c/0x110 [ 24.204734] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.205116] ? lock_is_held_type+0x9f/0x120 [ 24.205485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.205901] ? mtree_range_walk+0x632/0x900 [ 24.206277] ? mas_walk+0x5c7/0x7c0 [ 24.206610] do_vmi_munmap+0x1f1/0x2b0 [ 24.206948] mmap_region+0x1f9/0x2660 [ 24.207274] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.207661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.208144] ? __pfx_lock_acquire+0x10/0x10 [ 24.208510] ? __pfx_mmap_region+0x10/0x10 [ 24.208875] ? security_mmap_addr+0x7d/0xa0 [ 24.209243] ? get_unmapped_area+0x1f5/0x3f0 [ 24.209613] do_mmap+0x854/0xf00 [ 24.209911] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.210250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.210632] ksys_mmap_pgoff+0x3af/0x500 [ 24.210978] do_syscall_64+0x3f/0x90 [ 24.211304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.211785] RIP: 0033:0x7f8f5fb1cd82 [ 24.212096] 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 [ 24.213572] RSP: 002b:00007ffe1ee88eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.214184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f5fb1cd82 [ 24.214764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f5ef56000 [ 24.215343] RBP: 00007f8f5ef56000 R08: 0000000000000009 R09: 0000000000001000 [ 24.215941] R10: 0000000000000812 R11: 0000000000000206 R12: 000056186c20dec0 [ 24.216520] R13: 00007ffe1ee88ed0 R14: 00007ffe1ee88f00 R15: 00007ffe1ee89260 [ 24.217107] [ 24.217310] [ 24.217457] Allocated by task 209: [ 24.217756] kasan_save_stack+0x22/0x50 [ 24.218103] kasan_set_track+0x25/0x30 [ 24.218442] __kasan_slab_alloc+0x59/0x70 [ 24.218802] kmem_cache_alloc+0x16b/0x370 [ 24.219154] vm_area_dup+0x20/0x160 [ 24.219453] __split_vma+0x170/0x950 [ 24.219778] split_vma+0xc6/0x110 [ 24.220054] mprotect_fixup+0x8d2/0xb30 [ 24.220370] do_mprotect_pkey+0x87e/0xd40 [ 24.220722] __x64_sys_mprotect+0x78/0xc0 [ 24.221075] do_syscall_64+0x3f/0x90 [ 24.221400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.221840] [ 24.221990] Freed by task 209: [ 24.222256] kasan_save_stack+0x22/0x50 [ 24.222600] kasan_set_track+0x25/0x30 [ 24.222935] kasan_save_free_info+0x2b/0x50 [ 24.223296] __kasan_slab_free+0x10a/0x190 [ 24.223669] kmem_cache_free+0x10d/0x4d0 [ 24.224010] rcu_core+0x8c8/0x2860 [ 24.224310] __do_softirq+0x1b7/0x7d4 [ 24.224636] [ 24.224784] Last potentially related work creation: [ 24.225185] kasan_save_stack+0x22/0x50 [ 24.225532] __kasan_record_aux_stack+0x8e/0xa0 [ 24.225928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.226363] remove_vma+0x139/0x170 [ 24.226667] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.227050] do_vmi_munmap+0x1f1/0x2b0 [ 24.227379] __vm_munmap+0x138/0x3a0 [ 24.227726] __x64_sys_munmap+0x59/0x80 [ 24.228063] do_syscall_64+0x3f/0x90 [ 24.228383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.228826] [ 24.228974] Second to last potentially related work creation: [ 24.229536] kasan_save_stack+0x22/0x50 [ 24.229933] __kasan_record_aux_stack+0x8e/0xa0 [ 24.230411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.230890] remove_vma+0x139/0x170 [ 24.231257] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.231713] do_vmi_munmap+0x1f1/0x2b0 [ 24.232103] mmap_region+0x1f9/0x2660 [ 24.232465] do_mmap+0x854/0xf00 [ 24.232782] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.233113] ksys_mmap_pgoff+0x3af/0x500 [ 24.233454] do_syscall_64+0x3f/0x90 [ 24.233779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.234212] [ 24.234353] The buggy address belongs to the object at ffff88800904f1d0 [ 24.234353] which belongs to the cache vm_area_struct of size 168 [ 24.235304] The buggy address is located 88 bytes inside of [ 24.235304] freed 168-byte region [ffff88800904f1d0, ffff88800904f278) [ 24.236220] [ 24.236364] The buggy address belongs to the physical page: [ 24.236789] page:00000000ba40e8ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x904f [ 24.237487] memcg:ffff88800904e401 [ 24.237771] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.238188] page_type: 0xffffffff() [ 24.238482] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ab7c0 dead000000000006 [ 24.239083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800904e401 [ 24.239702] page dumped because: kasan: bad access detected [ 24.240127] [ 24.240268] Memory state around the buggy address: [ 24.240645] ffff88800904f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.241300] ffff88800904f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.241854] >ffff88800904f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.242403] ^ [ 24.242762] ffff88800904f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.243316] ffff88800904f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.243885] ================================================================== [ 24.244606] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.498181] BUG: Bad rss-counter state mm:00000000b6acf04a type:MM_FILEPAGES val:33 [ 25.498771] BUG: Bad rss-counter state mm:00000000b6acf04a type:MM_ANONPAGES val:22 [ 25.850793] BUG: Bad rss-counter state mm:00000000105efed0 type:MM_FILEPAGES val:33 [ 25.851407] BUG: Bad rss-counter state mm:00000000105efed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20813' (ECDSA) to the list of known hosts. 2023/06/21 00:15:20 fuzzer started 2023/06/21 00:15:20 dialing manager at localhost:36067 2023/06/21 00:15:20 checking machine... 2023/06/21 00:15:20 checking revisions... [ 26.397774] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:15:20 testing simple program... [ 26.428607] cgroup: Unknown subsys name 'net' [ 26.482057] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:15:20 Registers: info registers vcpu 0 RAX=1ffff110019c9e13 RBX=ffff88800ce4f068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ce4f098 RBP=ffff88800d51c100 RSP=ffff888017f2fa18 R8 =0000000000000001 R9 =ffffed1002fe5f37 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800c609e00 R14=ffffffff844ae5be R15=0000000000000001 RIP=ffffffff818464e2 RFL=00000046 [---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 00007fa89afe8900 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=00007fa89afb2008 CR3=0000000019e64000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f4887c6b5c0 CR3=000000000c690000 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=29853ef75ce2ddb4f24c6e313203da1e XMM02=ec2efd57dc4c00df0000000000119cf8 XMM03=62e224b51243fadd0000000000119dc8 XMM04=9388aba129f8882200000000000ae988 XMM05=751b9502027dc0b90000000000131a70 XMM06=bdf2e299e47b49d500000000001318f8 XMM07=e042d86d42eb936e0000000000120e38 XMM08=62e224b51243fadd0000000000119dc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000