syzkaller login: [ 41.128638] BUG: Bad rss-counter state mm:00000000bfcc82aa type:MM_FILEPAGES val:33 [ 41.130816] BUG: Bad rss-counter state mm:00000000bfcc82aa type:MM_ANONPAGES val:22 [ 41.268825] ================================================================== [ 41.269455] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.270072] Read of size 8 at addr ffff888008de7968 by task sshd/218 [ 41.270608] [ 41.270762] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.271388] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.272089] Call Trace: [ 41.272326] [ 41.272537] dump_stack_lvl+0x91/0xf0 [ 41.273141] print_report+0xcc/0x620 [ 41.273499] ? __virt_addr_valid+0x102/0x340 [ 41.273868] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.274296] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.274728] kasan_report+0xbe/0xf0 [ 41.275061] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.275501] vma_interval_tree_remove+0xc75/0xec0 [ 41.275924] vma_prepare+0xc54/0x11a0 [ 41.276262] __split_vma+0x5af/0x950 [ 41.276600] ? __pfx___split_vma+0x10/0x10 [ 41.277185] ? find_held_lock+0x2c/0x110 [ 41.277573] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.278006] ? lock_is_held_type+0x9f/0x120 [ 41.278380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.278805] ? mtree_range_walk+0x632/0x900 [ 41.279193] ? mas_walk+0x5c7/0x7c0 [ 41.279525] do_vmi_munmap+0x1f1/0x2b0 [ 41.279869] mmap_region+0x1f9/0x2660 [ 41.280207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.280565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.281087] ? __pfx_lock_acquire+0x10/0x10 [ 41.281454] ? __pfx_mmap_region+0x10/0x10 [ 41.281822] ? security_mmap_addr+0x7d/0xa0 [ 41.282193] ? get_unmapped_area+0x1f5/0x3f0 [ 41.282583] do_mmap+0x854/0xf00 [ 41.282888] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.283235] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.283631] ksys_mmap_pgoff+0x3af/0x500 [ 41.283988] do_syscall_64+0x3f/0x90 [ 41.284320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.284803] RIP: 0033:0x7f1e44637d82 [ 41.285123] 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 [ 41.286613] RSP: 002b:00007ffffc42e7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.287247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e44637d82 [ 41.287837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e43a71000 [ 41.288448] RBP: 00007f1e43a71000 R08: 0000000000000009 R09: 0000000000001000 [ 41.289081] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a4010ef70 [ 41.289680] R13: 00007ffffc42e7d0 R14: 00007ffffc42e800 R15: 00007ffffc42eb60 [ 41.290287] [ 41.290492] [ 41.290643] Allocated by task 211: [ 41.290944] kasan_save_stack+0x22/0x50 [ 41.291297] kasan_set_track+0x25/0x30 [ 41.291642] __kasan_slab_alloc+0x59/0x70 [ 41.292006] kmem_cache_alloc+0x16b/0x370 [ 41.292366] vm_area_dup+0x20/0x160 [ 41.292718] __split_vma+0x170/0x950 [ 41.293044] split_vma+0xc6/0x110 [ 41.293351] mprotect_fixup+0x8d2/0xb30 [ 41.293702] do_mprotect_pkey+0x87e/0xd40 [ 41.294063] __x64_sys_mprotect+0x78/0xc0 [ 41.294422] do_syscall_64+0x3f/0x90 [ 41.294752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.295199] [ 41.295350] Freed by task 13: [ 41.295618] kasan_save_stack+0x22/0x50 [ 41.295967] kasan_set_track+0x25/0x30 [ 41.296310] kasan_save_free_info+0x2b/0x50 [ 41.296711] __kasan_slab_free+0x10a/0x190 [ 41.297084] kmem_cache_free+0x10d/0x4d0 [ 41.297444] rcu_core+0x8c8/0x2860 [ 41.297760] __do_softirq+0x1b7/0x7d4 [ 41.298093] [ 41.298238] Last potentially related work creation: [ 41.298650] kasan_save_stack+0x22/0x50 [ 41.299001] __kasan_record_aux_stack+0x8e/0xa0 [ 41.299394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.299863] remove_vma+0x139/0x170 [ 41.300185] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.300578] do_vmi_munmap+0x1f1/0x2b0 [ 41.300948] __vm_munmap+0x138/0x3a0 [ 41.301277] __x64_sys_munmap+0x59/0x80 [ 41.301632] do_syscall_64+0x3f/0x90 [ 41.301974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.302422] [ 41.302575] Second to last potentially related work creation: [ 41.303051] kasan_save_stack+0x22/0x50 [ 41.303403] __kasan_record_aux_stack+0x8e/0xa0 [ 41.303803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.304258] remove_vma+0x139/0x170 [ 41.304579] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.304983] do_vmi_munmap+0x1f1/0x2b0 [ 41.305320] mmap_region+0x1f9/0x2660 [ 41.305659] do_mmap+0x854/0xf00 [ 41.305968] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.306306] ksys_mmap_pgoff+0x3af/0x500 [ 41.306657] do_syscall_64+0x3f/0x90 [ 41.306986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.307433] [ 41.307606] The buggy address belongs to the object at ffff888008de7910 [ 41.307606] which belongs to the cache vm_area_struct of size 168 [ 41.308624] The buggy address is located 88 bytes inside of [ 41.308624] freed 168-byte region [ffff888008de7910, ffff888008de79b8) [ 41.309631] [ 41.309782] The buggy address belongs to the physical page: [ 41.310245] page:000000002b0a31e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8de7 [ 41.311006] memcg:ffff88800eb24c01 [ 41.311300] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.311792] page_type: 0xffffffff() [ 41.312113] raw: 0100000000000200 ffff88800879fc80 ffffea000037b7c0 dead000000000005 [ 41.312776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb24c01 [ 41.313401] page dumped because: kasan: bad access detected [ 41.313907] [ 41.314057] Memory state around the buggy address: [ 41.314459] ffff888008de7800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 41.315087] ffff888008de7880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 41.315686] >ffff888008de7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.316284] ^ [ 41.316928] ffff888008de7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.317527] ffff888008de7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.318117] ================================================================== [ 41.318852] Disabling lock debugging due to kernel taint [ 43.530892] BUG: Bad rss-counter state mm:00000000db31d294 type:MM_FILEPAGES val:33 [ 43.531562] BUG: Bad rss-counter state mm:00000000db31d294 type:MM_ANONPAGES val:22 [ 44.063914] BUG: Bad rss-counter state mm:000000009ead85cc type:MM_FILEPAGES val:33 [ 44.064602] BUG: Bad rss-counter state mm:000000009ead85cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54901' (ECDSA) to the list of known hosts. 2023/06/20 00:07:48 fuzzer started 2023/06/20 00:07:48 dialing manager at localhost:44161 2023/06/20 00:07:48 checking machine... 2023/06/20 00:07:48 checking revisions... [ 44.688768] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:07:48 testing simple program... [ 44.725061] cgroup: Unknown subsys name 'net' [ 44.777487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:07:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018003c10 RCX=ffffffff812e00e5 RDX=1ffff110032fc7b0 RSI=0000000000000246 RDI=ffff8880197e3d80 RBP=ffff888018003c58 RSP=ffff8880101e7ad8 R8 =0000000000000001 R9 =ffffed100203cf49 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880197e3d78 R13=ffff888018003c60 R14=0000000000000000 R15=ffffffff854ee9e0 RIP=ffffffff82244648 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 00007f76b96df900 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=00007f46b5eb2b40 CR3=000000000f4aa000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88807ffd7030 RCX=0000000000000100 RDX=ffff888008e2d1c0 RSI=ffffffff811432ca RDI=0000000000000007 RBP=0000000018218410 RSP=ffff888008e57c40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000128 R12=0000000000000000 R13=ffffea000000000f R14=0000000000000002 R15=ffff88800c7a5480 RIP=ffffffff811432ca 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 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=00007fa8b8e87328 CR3=0000000005482000 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