[ 31.604238] BUG: Bad rss-counter state mm:000000002ead207e type:MM_FILEPAGES val:33 [ 31.605184] BUG: Bad rss-counter state mm:000000002ead207e type:MM_ANONPAGES val:22 [ 31.770887] ================================================================== [ 31.771981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.773131] Read of size 8 at addr ffff88800d44d140 by task sshd/219 [ 31.774140] [ 31.774364] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.775363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.776579] Call Trace: [ 31.776983] [ 31.777338] dump_stack_lvl+0x91/0xf0 [ 31.777972] print_report+0xcc/0x620 [ 31.778574] ? __virt_addr_valid+0x102/0x340 [ 31.779264] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780038] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780804] kasan_report+0xbe/0xf0 [ 31.781399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.782212] vma_interval_tree_remove+0xc75/0xec0 [ 31.782913] vma_prepare+0xc54/0x11a0 [ 31.783390] __split_vma+0x5af/0x950 [ 31.783864] ? __pfx___split_vma+0x10/0x10 [ 31.784399] ? find_held_lock+0x2c/0x110 [ 31.784924] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.785491] ? lock_is_held_type+0x9f/0x120 [ 31.786041] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.786652] ? mtree_range_walk+0x632/0x900 [ 31.787214] ? mas_walk+0x5c7/0x7c0 [ 31.787682] do_vmi_munmap+0x1f1/0x2b0 [ 31.788181] mmap_region+0x1f9/0x2660 [ 31.788670] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.789190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.789932] ? __pfx_lock_acquire+0x10/0x10 [ 31.790473] ? __pfx_mmap_region+0x10/0x10 [ 31.791005] ? security_mmap_addr+0x7d/0xa0 [ 31.791543] ? get_unmapped_area+0x1f5/0x3f0 [ 31.792099] do_mmap+0x854/0xf00 [ 31.792539] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.793038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.793605] ksys_mmap_pgoff+0x3af/0x500 [ 31.794142] do_syscall_64+0x3f/0x90 [ 31.794623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.795284] RIP: 0033:0x7f41a5fa4d82 [ 31.795746] 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 [ 31.797947] RSP: 002b:00007ffe2847be18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.799008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41a5fa4d82 [ 31.800036] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41a53de000 [ 31.801064] RBP: 00007f41a53de000 R08: 0000000000000009 R09: 0000000000001000 [ 31.802124] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d98829ab20 [ 31.803155] R13: 00007ffe2847be30 R14: 00007ffe2847be60 R15: 00007ffe2847c1c0 [ 31.804214] [ 31.804564] [ 31.804821] Allocated by task 212: [ 31.805344] kasan_save_stack+0x22/0x50 [ 31.805956] kasan_set_track+0x25/0x30 [ 31.806553] __kasan_slab_alloc+0x59/0x70 [ 31.807190] kmem_cache_alloc+0x16b/0x370 [ 31.807815] vm_area_dup+0x20/0x160 [ 31.808359] __split_vma+0x170/0x950 [ 31.808921] split_vma+0xc6/0x110 [ 31.809447] mprotect_fixup+0x8d2/0xb30 [ 31.810065] do_mprotect_pkey+0x87e/0xd40 [ 31.810693] __x64_sys_mprotect+0x78/0xc0 [ 31.811331] do_syscall_64+0x3f/0x90 [ 31.811903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.812678] [ 31.812934] Freed by task 19: [ 31.813402] kasan_save_stack+0x22/0x50 [ 31.814034] kasan_set_track+0x25/0x30 [ 31.814623] kasan_save_free_info+0x2b/0x50 [ 31.815265] __kasan_slab_free+0x10a/0x190 [ 31.815922] kmem_cache_free+0x10d/0x4d0 [ 31.816532] rcu_core+0x8c8/0x2860 [ 31.817074] __do_softirq+0x1b7/0x7d4 [ 31.817656] [ 31.817921] Last potentially related work creation: [ 31.818643] kasan_save_stack+0x22/0x50 [ 31.819253] __kasan_record_aux_stack+0x8e/0xa0 [ 31.819948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.820739] remove_vma+0x139/0x170 [ 31.821285] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.821993] do_vmi_munmap+0x1f1/0x2b0 [ 31.822580] __vm_munmap+0x138/0x3a0 [ 31.823156] __x64_sys_munmap+0x59/0x80 [ 31.823752] do_syscall_64+0x3f/0x90 [ 31.824320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825094] [ 31.825352] The buggy address belongs to the object at ffff88800d44d0e8 [ 31.825352] which belongs to the cache vm_area_struct of size 168 [ 31.826862] The buggy address is located 88 bytes inside of [ 31.826862] freed 168-byte region [ffff88800d44d0e8, ffff88800d44d190) [ 31.828181] [ 31.828388] The buggy address belongs to the physical page: [ 31.829016] page:00000000af2a5f03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd44d [ 31.830048] memcg:ffff88800d55de01 [ 31.830457] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.831067] page_type: 0xffffffff() [ 31.831499] raw: 0100000000000200 ffff8880087a0c80 ffffea000036eb40 dead000000000006 [ 31.832365] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d55de01 [ 31.833225] page dumped because: kasan: bad access detected [ 31.833861] [ 31.834071] Memory state around the buggy address: [ 31.834628] ffff88800d44d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.835457] ffff88800d44d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.836290] >ffff88800d44d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.837118] ^ [ 31.837746] ffff88800d44d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.838588] ffff88800d44d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.839408] ================================================================== [ 31.840515] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.543934] BUG: Bad rss-counter state mm:00000000595df8ac type:MM_FILEPAGES val:33 [ 33.544595] BUG: Bad rss-counter state mm:00000000595df8ac type:MM_ANONPAGES val:22 [ 33.902503] BUG: Bad rss-counter state mm:00000000abc2d6d3 type:MM_FILEPAGES val:33 [ 33.903091] BUG: Bad rss-counter state mm:00000000abc2d6d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45619' (ECDSA) to the list of known hosts. 2023/06/20 22:13:34 fuzzer started 2023/06/20 22:13:35 dialing manager at localhost:36067 2023/06/20 22:13:35 checking machine... 2023/06/20 22:13:35 checking revisions... [ 34.610271] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:13:35 testing simple program... [ 34.652351] cgroup: Unknown subsys name 'net' [ 34.714609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:13:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864ab9a8 RDX=0000000000000008 RSI=ffff88801cd8fb08 RDI=ffff88806ce09a40 RBP=ffff88806ce09a98 RSP=ffff88806ce099b0 R8 =ffffffff864ab9ac R9 =ffff88806ce09a80 R10=0000000000038001 R11=00000000000b3f70 R12=ffff88806ce09aa0 R13=ffff88806ce09a88 R14=ffff88801cd8fb10 R15=ffff88806ce09a40 RIP=ffffffff81130400 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 00007fefa3f04900 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=00007fefa3ea9008 CR3=0000000016fca000 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=00007f98e758c000 CR3=000000000d626000 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=9e9c83052309b6ad9d42ef39363fed8c XMM02=ec2efd57dc4c00df000000000011b1a8 XMM03=c83bbb93a0ff9b0c000000000011b278 XMM04=559bfda87662b30a00000000000ae988 XMM05=dfcdbad4f1609c370000000000131748 XMM06=9a1003d0abd84cba0000000000130920 XMM07=e042d86d42eb936e0000000000121f18 XMM08=c83bbb93a0ff9b0c000000000011b278 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000