[ 25.083363] BUG: Bad rss-counter state mm:000000000a89b172 type:MM_FILEPAGES val:33 [ 25.085254] BUG: Bad rss-counter state mm:000000000a89b172 type:MM_ANONPAGES val:22 [ 25.241032] ================================================================== [ 25.241993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.242945] Read of size 8 at addr ffff888019bc05c8 by task sshd/220 [ 25.243770] [ 25.243998] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.245062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.246095] Call Trace: [ 25.246427] [ 25.246725] dump_stack_lvl+0x91/0xf0 [ 25.247236] print_report+0xcc/0x620 [ 25.247745] ? __virt_addr_valid+0x102/0x340 [ 25.248314] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.248958] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.249603] kasan_report+0xbe/0xf0 [ 25.250104] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.250771] vma_interval_tree_remove+0xc75/0xec0 [ 25.251405] vma_prepare+0xc54/0x11a0 [ 25.251904] __split_vma+0x5af/0x950 [ 25.252389] ? __pfx___split_vma+0x10/0x10 [ 25.252935] ? find_held_lock+0x2c/0x110 [ 25.253485] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.254066] ? lock_is_held_type+0x9f/0x120 [ 25.254629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.255256] ? mtree_range_walk+0x632/0x900 [ 25.255828] ? mas_walk+0x5c7/0x7c0 [ 25.256319] do_vmi_munmap+0x1f1/0x2b0 [ 25.256822] mmap_region+0x1f9/0x2660 [ 25.257319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.257869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.258640] ? __pfx_lock_acquire+0x10/0x10 [ 25.259201] ? __pfx_mmap_region+0x10/0x10 [ 25.259756] ? security_mmap_addr+0x7d/0xa0 [ 25.260309] ? get_unmapped_area+0x1f5/0x3f0 [ 25.260886] do_mmap+0x854/0xf00 [ 25.261346] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.261882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.262466] ksys_mmap_pgoff+0x3af/0x500 [ 25.263000] do_syscall_64+0x3f/0x90 [ 25.263492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.264160] RIP: 0033:0x7f2e14746d82 [ 25.264638] 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 [ 25.266920] RSP: 002b:00007ffec1653818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.267859] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e14746d82 [ 25.268765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e13b80000 [ 25.269818] RBP: 00007f2e13b80000 R08: 0000000000000009 R09: 0000000000001000 [ 25.270930] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605c0b13f70 [ 25.272057] R13: 00007ffec1653830 R14: 00007ffec1653860 R15: 00007ffec1653bc0 [ 25.273198] [ 25.273605] [ 25.273887] Allocated by task 213: [ 25.274454] kasan_save_stack+0x22/0x50 [ 25.275123] kasan_set_track+0x25/0x30 [ 25.275769] __kasan_slab_alloc+0x59/0x70 [ 25.276467] kmem_cache_alloc+0x16b/0x370 [ 25.277128] vm_area_dup+0x20/0x160 [ 25.277738] __split_vma+0x170/0x950 [ 25.278375] split_vma+0xc6/0x110 [ 25.278971] mprotect_fixup+0x8d2/0xb30 [ 25.279653] do_mprotect_pkey+0x87e/0xd40 [ 25.280344] __x64_sys_mprotect+0x78/0xc0 [ 25.281034] do_syscall_64+0x3f/0x90 [ 25.281671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.282517] [ 25.282801] Freed by task 213: [ 25.283317] kasan_save_stack+0x22/0x50 [ 25.283971] kasan_set_track+0x25/0x30 [ 25.284618] kasan_save_free_info+0x2b/0x50 [ 25.285304] __kasan_slab_free+0x10a/0x190 [ 25.286103] kmem_cache_free+0x10d/0x4d0 [ 25.286762] rcu_core+0x8c8/0x2860 [ 25.287347] __do_softirq+0x1b7/0x7d4 [ 25.287968] [ 25.288254] Last potentially related work creation: [ 25.289049] kasan_save_stack+0x22/0x50 [ 25.289748] __kasan_record_aux_stack+0x8e/0xa0 [ 25.290533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.291372] remove_vma+0x139/0x170 [ 25.291952] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.292705] do_vmi_munmap+0x1f1/0x2b0 [ 25.293336] __vm_munmap+0x138/0x3a0 [ 25.293955] __x64_sys_munmap+0x59/0x80 [ 25.294608] do_syscall_64+0x3f/0x90 [ 25.295233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.296084] [ 25.296375] The buggy address belongs to the object at ffff888019bc0570 [ 25.296375] which belongs to the cache vm_area_struct of size 168 [ 25.298310] The buggy address is located 88 bytes inside of [ 25.298310] freed 168-byte region [ffff888019bc0570, ffff888019bc0618) [ 25.300179] [ 25.300486] The buggy address belongs to the physical page: [ 25.301364] page:00000000d6fea042 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bc0 [ 25.302565] memcg:ffff888019f75701 [ 25.303006] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.303676] page_type: 0xffffffff() [ 25.304138] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.305102] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f75701 [ 25.306074] page dumped because: kasan: bad access detected [ 25.306752] [ 25.306972] Memory state around the buggy address: [ 25.307580] ffff888019bc0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.308472] ffff888019bc0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 25.309373] >ffff888019bc0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.310256] ^ [ 25.310950] ffff888019bc0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 25.311837] ffff888019bc0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.312727] ================================================================== [ 25.313757] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.338235] BUG: Bad rss-counter state mm:000000005a815412 type:MM_FILEPAGES val:33 [ 27.339215] BUG: Bad rss-counter state mm:000000005a815412 type:MM_ANONPAGES val:22 [ 27.923622] BUG: Bad rss-counter state mm:00000000f8003d57 type:MM_FILEPAGES val:33 [ 27.924851] BUG: Bad rss-counter state mm:00000000f8003d57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42155' (ECDSA) to the list of known hosts. 2023/06/20 05:31:37 fuzzer started 2023/06/20 05:31:38 dialing manager at localhost:44161 2023/06/20 05:31:38 checking machine... 2023/06/20 05:31:38 checking revisions... [ 28.680051] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:31:38 testing simple program... [ 28.729365] cgroup: Unknown subsys name 'net' [ 28.768511] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:31:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001000 RCX=0000000000000000 RDX=ffff8880165e8000 RSI=ffffffff81c60861 RDI=ffff8880101c20b8 RBP=dffffc0000000000 RSP=ffff88801815f8b8 R8 =0000000000000004 R9 =0000000000001000 R10=0000000000000003 R11=00000000000b6996 R12=0000000000000008 R13=0000000000000c40 R14=ffff8880101c20b8 R15=ffff8880101c2000 RIP=ffffffff84530035 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 00007fa775e9b700 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=00007fee55c9c618 CR3=000000000e7e2000 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=2037333a31333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a31333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863c581f RBX=0000000000000001 RCX=ffffffff863c581a RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c78b03 RBP=ffff88800d6271b0 RSP=ffff88800d6270e8 R8 =ffffffff863c581e R9 =ffff88800d627198 R10=0000000000038001 R11=000000000008de0d R12=ffff88800d6271b8 R13=ffff88800d6271a0 R14=ffff88800d627988 R15=ffff88800d627158 RIP=ffffffff81131127 RFL=00000217 [----APC] 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 00007fee556e5900 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=00007f48dc6eeaa0 CR3=000000000e58a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000