[ 47.183708] BUG: Bad rss-counter state mm:00000000f66cae92 type:MM_FILEPAGES val:33 [ 47.185037] BUG: Bad rss-counter state mm:00000000f66cae92 type:MM_ANONPAGES val:22 [ 47.223453] ================================================================== [ 47.224473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.225432] Read of size 8 at addr ffff888016ce7058 by task sshd/219 [ 47.226203] [ 47.226424] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.227328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.228319] Call Trace: [ 47.228647] [ 47.228932] dump_stack_lvl+0x91/0xf0 [ 47.229442] print_report+0xcc/0x620 [ 47.229936] ? __virt_addr_valid+0x102/0x340 [ 47.230492] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.231129] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.231753] kasan_report+0xbe/0xf0 [ 47.232232] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.232857] vma_interval_tree_remove+0xc75/0xec0 [ 47.233460] vma_prepare+0xc54/0x11a0 [ 47.233944] __split_vma+0x5af/0x950 [ 47.234416] ? __pfx___split_vma+0x10/0x10 [ 47.234948] ? find_held_lock+0x2c/0x110 [ 47.235474] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.236049] ? lock_is_held_type+0x9f/0x120 [ 47.236613] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.237220] ? mtree_range_walk+0x632/0x900 [ 47.237783] ? mas_walk+0x5c7/0x7c0 [ 47.238257] do_vmi_munmap+0x1f1/0x2b0 [ 47.238749] mmap_region+0x1f9/0x2660 [ 47.239238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.239752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.240480] ? __pfx_lock_acquire+0x10/0x10 [ 47.241011] ? __pfx_mmap_region+0x10/0x10 [ 47.241545] ? security_mmap_addr+0x7d/0xa0 [ 47.242079] ? get_unmapped_area+0x1f5/0x3f0 [ 47.242634] do_mmap+0x854/0xf00 [ 47.243081] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.243575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.244141] ksys_mmap_pgoff+0x3af/0x500 [ 47.244662] do_syscall_64+0x3f/0x90 [ 47.245140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.245785] RIP: 0033:0x7f81caf6cd82 [ 47.246246] 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 [ 47.248409] RSP: 002b:00007ffd872fcb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.249330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81caf6cd82 [ 47.250186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81ca3a6000 [ 47.251158] RBP: 00007f81ca3a6000 R08: 0000000000000009 R09: 0000000000001000 [ 47.252017] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d94941ec0 [ 47.252889] R13: 00007ffd872fcb40 R14: 00007ffd872fcb70 R15: 00007ffd872fced0 [ 47.253756] [ 47.254051] [ 47.254264] Allocated by task 212: [ 47.254693] kasan_save_stack+0x22/0x50 [ 47.255198] kasan_set_track+0x25/0x30 [ 47.255691] __kasan_slab_alloc+0x59/0x70 [ 47.256217] kmem_cache_alloc+0x16b/0x370 [ 47.256761] vm_area_dup+0x20/0x160 [ 47.257218] __split_vma+0x170/0x950 [ 47.257688] split_vma+0xc6/0x110 [ 47.258128] mprotect_fixup+0x8d2/0xb30 [ 47.258632] do_mprotect_pkey+0x87e/0xd40 [ 47.259162] __x64_sys_mprotect+0x78/0xc0 [ 47.259692] do_syscall_64+0x3f/0x90 [ 47.260168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.260825] [ 47.261043] Freed by task 212: [ 47.261437] kasan_save_stack+0x22/0x50 [ 47.261943] kasan_set_track+0x25/0x30 [ 47.262437] kasan_save_free_info+0x2b/0x50 [ 47.262969] __kasan_slab_free+0x10a/0x190 [ 47.263503] kmem_cache_free+0x10d/0x4d0 [ 47.264015] rcu_core+0x8c8/0x2860 [ 47.264471] __do_softirq+0x1b7/0x7d4 [ 47.264946] [ 47.265159] Last potentially related work creation: [ 47.265753] kasan_save_stack+0x22/0x50 [ 47.266266] __kasan_record_aux_stack+0x8e/0xa0 [ 47.266837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.267490] remove_vma+0x139/0x170 [ 47.267945] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.268519] do_vmi_munmap+0x1f1/0x2b0 [ 47.269016] __vm_munmap+0x138/0x3a0 [ 47.269488] __x64_sys_munmap+0x59/0x80 [ 47.269987] do_syscall_64+0x3f/0x90 [ 47.270464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.271112] [ 47.271325] Second to last potentially related work creation: [ 47.272015] kasan_save_stack+0x22/0x50 [ 47.272537] __kasan_record_aux_stack+0x8e/0xa0 [ 47.273117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.273767] remove_vma+0x139/0x170 [ 47.274225] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.274788] do_vmi_munmap+0x1f1/0x2b0 [ 47.275278] mmap_region+0x1f9/0x2660 [ 47.275754] do_mmap+0x854/0xf00 [ 47.276192] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.276691] ksys_mmap_pgoff+0x3af/0x500 [ 47.277200] do_syscall_64+0x3f/0x90 [ 47.277679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.278325] [ 47.278540] The buggy address belongs to the object at ffff888016ce7000 [ 47.278540] which belongs to the cache vm_area_struct of size 168 [ 47.280024] The buggy address is located 88 bytes inside of [ 47.280024] freed 168-byte region [ffff888016ce7000, ffff888016ce70a8) [ 47.281465] [ 47.281681] The buggy address belongs to the physical page: [ 47.282348] page:0000000049f64133 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ce7 [ 47.283452] memcg:ffff88800966bc01 [ 47.283877] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.284529] page_type: 0xffffffff() [ 47.284980] raw: 0100000000000200 ffff88800879fc80 ffffea00003bef40 0000000000000006 [ 47.285911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800966bc01 [ 47.286826] page dumped because: kasan: bad access detected [ 47.287498] [ 47.287719] Memory state around the buggy address: [ 47.288303] ffff888016ce6f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 47.289196] ffff888016ce6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.290083] >ffff888016ce7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.290963] ^ [ 47.291688] ffff888016ce7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 47.292576] ffff888016ce7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.293446] ================================================================== [ 47.294965] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 49.163367] BUG: Bad rss-counter state mm:000000006c88fee1 type:MM_FILEPAGES val:33 [ 49.164643] BUG: Bad rss-counter state mm:000000006c88fee1 type:MM_ANONPAGES val:22 [ 49.693451] BUG: Bad rss-counter state mm:00000000f5d2a163 type:MM_FILEPAGES val:33 [ 49.694622] BUG: Bad rss-counter state mm:00000000f5d2a163 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20954' (ECDSA) to the list of known hosts. 2023/06/20 02:44:54 fuzzer started 2023/06/20 02:44:54 dialing manager at localhost:44161 2023/06/20 02:44:54 checking machine... 2023/06/20 02:44:54 checking revisions... [ 50.324866] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:44:54 testing simple program... [ 50.376329] cgroup: Unknown subsys name 'net' [ 50.434923] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:44:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016144808 RCX=0000000000000000 RDX=1ffff11002c28946 RSI=ffffffff81655e23 RDI=ffff888016144808 RBP=ffffea000060f0c0 RSP=ffff88800d8bf9c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6c88 R12=0000000000000293 R13=ffff888016144a38 R14=ffff888016144a30 R15=0000000000000001 RIP=ffffffff816b64d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f05c850b900 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=00007f05c7970b10 CR3=000000001457c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=28bd42a673b32ca400000000000ae988 XMM05=d2bf0fe034c0b7a900000000001370b0 XMM06=dfcdbad4f1609c370000000000135c30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe6d215dd8 CR3=000000000ebde000 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=2034353a34343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a34343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000