[ 31.778124] BUG: Bad rss-counter state mm:00000000b14cedaf type:MM_FILEPAGES val:33 [ 31.779231] BUG: Bad rss-counter state mm:00000000b14cedaf type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.937935] ================================================================== [ 31.938836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.939774] Read of size 8 at addr ffff888015e595c8 by task sshd/219 [ 31.940534] [ 31.940749] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.941671] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.942643] Call Trace: [ 31.942961] [ 31.943241] dump_stack_lvl+0x91/0xf0 [ 31.943742] print_report+0xcc/0x620 [ 31.944218] ? __virt_addr_valid+0x102/0x340 [ 31.944765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.945381] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.946000] kasan_report+0xbe/0xf0 [ 31.946468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.947083] vma_interval_tree_remove+0xc75/0xec0 [ 31.947709] vma_prepare+0xc54/0x11a0 [ 31.948194] __split_vma+0x5af/0x950 [ 31.948664] ? __pfx___split_vma+0x10/0x10 [ 31.949196] ? find_held_lock+0x2c/0x110 [ 31.949717] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.950288] ? lock_is_held_type+0x9f/0x120 [ 31.950826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.951430] ? mtree_range_walk+0x632/0x900 [ 31.951998] ? mas_walk+0x5c7/0x7c0 [ 31.952475] do_vmi_munmap+0x1f1/0x2b0 [ 31.952973] mmap_region+0x1f9/0x2660 [ 31.953457] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.953975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.954693] ? __pfx_lock_acquire+0x10/0x10 [ 31.955221] ? __pfx_mmap_region+0x10/0x10 [ 31.955773] ? security_mmap_addr+0x7d/0xa0 [ 31.956320] ? get_unmapped_area+0x1f5/0x3f0 [ 31.956875] do_mmap+0x854/0xf00 [ 31.957309] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.957803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.958363] ksys_mmap_pgoff+0x3af/0x500 [ 31.958875] do_syscall_64+0x3f/0x90 [ 31.959355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.960021] RIP: 0033:0x7f25ec122d82 [ 31.960477] 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 [ 31.962612] RSP: 002b:00007ffde8470a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.963533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25ec122d82 [ 31.964399] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25eb55c000 [ 31.965247] RBP: 00007f25eb55c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.966101] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3a6444d90 [ 31.966958] R13: 00007ffde8470a70 R14: 00007ffde8470aa0 R15: 00007ffde8470e00 [ 31.967848] [ 31.968143] [ 31.968357] Allocated by task 212: [ 31.968787] kasan_save_stack+0x22/0x50 [ 31.969293] kasan_set_track+0x25/0x30 [ 31.969792] __kasan_slab_alloc+0x59/0x70 [ 31.970314] kmem_cache_alloc+0x16b/0x370 [ 31.970834] vm_area_dup+0x20/0x160 [ 31.971290] __split_vma+0x170/0x950 [ 31.971767] split_vma+0xc6/0x110 [ 31.972205] mprotect_fixup+0x8d2/0xb30 [ 31.972708] do_mprotect_pkey+0x87e/0xd40 [ 31.973226] __x64_sys_mprotect+0x78/0xc0 [ 31.973747] do_syscall_64+0x3f/0x90 [ 31.974218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.974864] [ 31.975081] Freed by task 212: [ 31.975495] kasan_save_stack+0x22/0x50 [ 31.975995] kasan_set_track+0x25/0x30 [ 31.976490] kasan_save_free_info+0x2b/0x50 [ 31.977027] __kasan_slab_free+0x10a/0x190 [ 31.977555] kmem_cache_free+0x10d/0x4d0 [ 31.978066] rcu_core+0x8c8/0x2860 [ 31.978511] __do_softirq+0x1b7/0x7d4 [ 31.978988] [ 31.979206] Last potentially related work creation: [ 31.979816] kasan_save_stack+0x22/0x50 [ 31.980318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.980900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.981551] remove_vma+0x139/0x170 [ 31.982002] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.982565] do_vmi_munmap+0x1f1/0x2b0 [ 31.983053] __vm_munmap+0x138/0x3a0 [ 31.983536] __x64_sys_munmap+0x59/0x80 [ 31.984035] do_syscall_64+0x3f/0x90 [ 31.984516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.985166] [ 31.985386] The buggy address belongs to the object at ffff888015e59570 [ 31.985386] which belongs to the cache vm_area_struct of size 168 [ 31.986848] The buggy address is located 88 bytes inside of [ 31.986848] freed 168-byte region [ffff888015e59570, ffff888015e59618) [ 31.988269] [ 31.988489] The buggy address belongs to the physical page: [ 31.989147] page:0000000084f3abe9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e59 [ 31.990238] memcg:ffff88800fd2b801 [ 31.990659] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.991352] page_type: 0xffffffff() [ 31.991817] raw: 0100000000000200 ffff8880087a0c80 ffffea0000678380 dead000000000005 [ 31.992738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd2b801 [ 31.993644] page dumped because: kasan: bad access detected [ 31.994312] [ 31.994526] Memory state around the buggy address: [ 31.995117] ffff888015e59480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.995988] ffff888015e59500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.996839] >ffff888015e59580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.997694] ^ [ 31.998373] ffff888015e59600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.999252] ffff888015e59680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.000125] ================================================================== [ 32.001162] Disabling lock debugging due to kernel taint [ 34.298200] BUG: Bad rss-counter state mm:00000000fda56161 type:MM_FILEPAGES val:33 [ 34.299362] BUG: Bad rss-counter state mm:00000000fda56161 type:MM_ANONPAGES val:22 [ 34.684978] BUG: Bad rss-counter state mm:00000000dee4e557 type:MM_FILEPAGES val:33 [ 34.686003] BUG: Bad rss-counter state mm:00000000dee4e557 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35771' (ECDSA) to the list of known hosts. 2023/06/20 19:07:45 fuzzer started 2023/06/20 19:07:45 dialing manager at localhost:36067 2023/06/20 19:07:45 checking machine... 2023/06/20 19:07:45 checking revisions... [ 35.416013] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:07:45 testing simple program... [ 35.491007] cgroup: Unknown subsys name 'net' [ 35.556983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:07:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff81370a89 RDX=000000000000370a RSI=000000000000370a RDI=ffffffff864f7618 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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=00007fc36b11b770 CR3=000000000ee8c000 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=2034343a37303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a37303a3931203032 XMM08=00007fb6d40314c00000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880145a51c0 RBX=ffffffff856d84a0 RCX=ffffffff812e0473 RDX=1ffffffff0adb096 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888019e1f3a0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=ffffffff856d84b0 R13=0000000000000000 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff812e04cf 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 00007fd240ac5900 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=00007fd240a6a008 CR3=000000001816e000 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=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