[ 30.124986] BUG: Bad rss-counter state mm:0000000078c0eddd type:MM_FILEPAGES val:33 [ 30.125753] BUG: Bad rss-counter state mm:0000000078c0eddd type:MM_ANONPAGES val:22 [ 30.303788] ================================================================== [ 30.304471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.305129] Read of size 8 at addr ffff88800e3fc228 by task sshd/221 [ 30.305594] [ 30.305730] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.306339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.308379] Call Trace: [ 30.308584] [ 30.308928] dump_stack_lvl+0x91/0xf0 [ 30.309302] print_report+0xcc/0x620 [ 30.309618] ? __virt_addr_valid+0x102/0x340 [ 30.310028] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.312247] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.312628] kasan_report+0xbe/0xf0 [ 30.313179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.313566] vma_interval_tree_remove+0xc75/0xec0 [ 30.314145] vma_prepare+0xc54/0x11a0 [ 30.314481] __split_vma+0x5af/0x950 [ 30.314852] ? __pfx___split_vma+0x10/0x10 [ 30.315249] ? find_held_lock+0x2c/0x110 [ 30.315574] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.316003] ? lock_is_held_type+0x9f/0x120 [ 30.316416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.316845] ? mtree_range_walk+0x632/0x900 [ 30.317238] ? mas_walk+0x5c7/0x7c0 [ 30.317535] do_vmi_munmap+0x1f1/0x2b0 [ 30.318027] mmap_region+0x1f9/0x2660 [ 30.318451] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.318775] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.319323] ? __pfx_lock_acquire+0x10/0x10 [ 30.319668] ? __pfx_mmap_region+0x10/0x10 [ 30.320038] ? security_mmap_addr+0x7d/0xa0 [ 30.320435] ? get_unmapped_area+0x1f5/0x3f0 [ 30.320781] do_mmap+0x854/0xf00 [ 30.321107] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.321473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.321835] ksys_mmap_pgoff+0x3af/0x500 [ 30.322178] do_syscall_64+0x3f/0x90 [ 30.324850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.325285] RIP: 0033:0x7f706c56fd82 [ 30.325617] 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 [ 30.327055] RSP: 002b:00007ffc4b554ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.327662] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f706c56fd82 [ 30.328242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f706b9a9000 [ 30.328834] RBP: 00007f706b9a9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.329367] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8eda48ec0 [ 30.329951] R13: 00007ffc4b554b00 R14: 00007ffc4b554b30 R15: 00007ffc4b554e90 [ 30.330516] [ 30.330762] [ 30.330901] Allocated by task 214: [ 30.331182] kasan_save_stack+0x22/0x50 [ 30.331505] kasan_set_track+0x25/0x30 [ 30.331873] __kasan_slab_alloc+0x59/0x70 [ 30.332233] kmem_cache_alloc+0x16b/0x370 [ 30.332560] vm_area_dup+0x20/0x160 [ 30.332902] __split_vma+0x170/0x950 [ 30.333208] split_vma+0xc6/0x110 [ 30.333491] mprotect_fixup+0x8d2/0xb30 [ 30.333866] do_mprotect_pkey+0x87e/0xd40 [ 30.334209] __x64_sys_mprotect+0x78/0xc0 [ 30.338650] do_syscall_64+0x3f/0x90 [ 30.338969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.339429] [ 30.339569] Freed by task 214: [ 30.339818] kasan_save_stack+0x22/0x50 [ 30.340170] kasan_set_track+0x25/0x30 [ 30.340533] kasan_save_free_info+0x2b/0x50 [ 30.340871] __kasan_slab_free+0x10a/0x190 [ 30.341253] kmem_cache_free+0x10d/0x4d0 [ 30.341621] rcu_core+0x8c8/0x2860 [ 30.341915] __do_softirq+0x1b7/0x7d4 [ 30.342238] [ 30.342496] Last potentially related work creation: [ 30.342863] kasan_save_stack+0x22/0x50 [ 30.343232] __kasan_record_aux_stack+0x8e/0xa0 [ 30.343642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.344053] remove_vma+0x139/0x170 [ 30.344338] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.344745] do_vmi_munmap+0x1f1/0x2b0 [ 30.345082] __vm_munmap+0x138/0x3a0 [ 30.345377] __x64_sys_munmap+0x59/0x80 [ 30.345738] do_syscall_64+0x3f/0x90 [ 30.346065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.346593] [ 30.346732] The buggy address belongs to the object at ffff88800e3fc1d0 [ 30.346732] which belongs to the cache vm_area_struct of size 168 [ 30.347696] The buggy address is located 88 bytes inside of [ 30.347696] freed 168-byte region [ffff88800e3fc1d0, ffff88800e3fc278) [ 30.348674] [ 30.348813] The buggy address belongs to the physical page: [ 30.349252] page:000000004e9192f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3fc [ 30.349981] memcg:ffff88800c839c01 [ 30.350292] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.350838] page_type: 0xffffffff() [ 30.351127] raw: 0100000000000200 ffff8880087a0c80 ffffea000025fe00 dead000000000007 [ 30.351751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c839c01 [ 30.352343] page dumped because: kasan: bad access detected [ 30.352812] [ 30.352950] Memory state around the buggy address: [ 30.353327] ffff88800e3fc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.353920] ffff88800e3fc180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.354540] >ffff88800e3fc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.355188] ^ [ 30.355541] ffff88800e3fc280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.356158] ffff88800e3fc300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.356688] ================================================================== [ 30.357444] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.521396] BUG: Bad rss-counter state mm:00000000ed439917 type:MM_FILEPAGES val:33 [ 33.522087] BUG: Bad rss-counter state mm:00000000ed439917 type:MM_ANONPAGES val:22 [ 34.175720] BUG: Bad rss-counter state mm:0000000066ce06b4 type:MM_FILEPAGES val:33 [ 34.177809] BUG: Bad rss-counter state mm:0000000066ce06b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14310' (ECDSA) to the list of known hosts. 2023/06/21 10:22:23 fuzzer started 2023/06/21 10:22:23 dialing manager at localhost:36067 2023/06/21 10:22:23 checking machine... 2023/06/21 10:22:23 checking revisions... [ 34.946017] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:22:23 testing simple program... [ 34.989032] cgroup: Unknown subsys name 'net' [ 35.073819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:22:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ed2c1e8 RCX=0000000000000000 RDX=ffff888015a5d1c0 RSI=ffffffff811889a0 RDI=0000000000000007 RBP=ffff888015a5d1c0 RSP=ffff88800ed2fe18 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000193e8 R12=0000000000000000 R13=ffff88800ed28000 R14=dffffc0000000000 R15=dffffc0000000000 RIP=ffffffff811889a0 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 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=00007fb84b6f2328 CR3=0000000005482000 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=0000000000000001 RBX=ffff88801616f670 RCX=ffffffff8613f401 RDX=1ffff11002c2ded9 RSI=0000000000000000 RDI=ffffffff818475d2 RBP=ffff88801616f6c8 RSP=ffff88801616f650 R8 =ffffffff8613f412 R9 =ffff88801616f6b0 R10=0000000000038001 R11=0000000000021e7d R12=ffff88801616f738 R13=0000000000000000 R14=ffff88800fed1b40 R15=ffff88800ea0d390 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007fe473e2f900 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=00007ffd6083dcd8 CR3=000000000ed6c000 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