syzkaller login: [ 38.816249] BUG: Bad rss-counter state mm:0000000083a4ba58 type:MM_FILEPAGES val:33 [ 38.818071] BUG: Bad rss-counter state mm:0000000083a4ba58 type:MM_ANONPAGES val:22 [ 38.998985] ================================================================== [ 38.999920] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.000878] Read of size 8 at addr ffff88800eb975c8 by task sshd/220 [ 39.001762] [ 39.001981] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.002853] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.003841] Call Trace: [ 39.004165] [ 39.004454] dump_stack_lvl+0x91/0xf0 [ 39.004969] print_report+0xcc/0x620 [ 39.005452] ? __virt_addr_valid+0x102/0x340 [ 39.006011] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.006639] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.007273] kasan_report+0xbe/0xf0 [ 39.007758] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.008378] vma_interval_tree_remove+0xc75/0xec0 [ 39.009021] vma_prepare+0xc54/0x11a0 [ 39.009507] __split_vma+0x5af/0x950 [ 39.009992] ? __pfx___split_vma+0x10/0x10 [ 39.010535] ? find_held_lock+0x2c/0x110 [ 39.011057] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.011647] ? lock_is_held_type+0x9f/0x120 [ 39.012191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.012828] ? mtree_range_walk+0x632/0x900 [ 39.013377] ? mas_walk+0x5c7/0x7c0 [ 39.013870] do_vmi_munmap+0x1f1/0x2b0 [ 39.014381] mmap_region+0x1f9/0x2660 [ 39.014883] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.015393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.016113] ? __pfx_lock_acquire+0x10/0x10 [ 39.016661] ? __pfx_mmap_region+0x10/0x10 [ 39.017200] ? security_mmap_addr+0x7d/0xa0 [ 39.017756] ? get_unmapped_area+0x1f5/0x3f0 [ 39.018321] do_mmap+0x854/0xf00 [ 39.018772] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.019271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.019836] ksys_mmap_pgoff+0x3af/0x500 [ 39.020405] do_syscall_64+0x3f/0x90 [ 39.020908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021562] RIP: 0033:0x7f57eaa03d82 [ 39.022078] 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 [ 39.024257] RSP: 002b:00007ffff49a6c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.025189] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57eaa03d82 [ 39.026028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57e9e3d000 [ 39.026886] RBP: 00007f57e9e3d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.027731] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587cb6aef70 [ 39.028593] R13: 00007ffff49a6c20 R14: 00007ffff49a6c50 R15: 00007ffff49a6fb0 [ 39.029446] [ 39.029736] [ 39.029952] Allocated by task 213: [ 39.030378] kasan_save_stack+0x22/0x50 [ 39.030886] kasan_set_track+0x25/0x30 [ 39.031379] __kasan_slab_alloc+0x59/0x70 [ 39.031904] kmem_cache_alloc+0x16b/0x370 [ 39.032420] vm_area_dup+0x20/0x160 [ 39.032891] __split_vma+0x170/0x950 [ 39.033352] split_vma+0xc6/0x110 [ 39.033793] mprotect_fixup+0x8d2/0xb30 [ 39.034299] do_mprotect_pkey+0x87e/0xd40 [ 39.034830] __x64_sys_mprotect+0x78/0xc0 [ 39.035349] do_syscall_64+0x3f/0x90 [ 39.035836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.036487] [ 39.036710] Freed by task 213: [ 39.037096] kasan_save_stack+0x22/0x50 [ 39.037593] kasan_set_track+0x25/0x30 [ 39.038084] kasan_save_free_info+0x2b/0x50 [ 39.038619] __kasan_slab_free+0x10a/0x190 [ 39.039153] kmem_cache_free+0x10d/0x4d0 [ 39.039664] rcu_core+0x8c8/0x2860 [ 39.040105] __do_softirq+0x1b7/0x7d4 [ 39.040600] [ 39.040823] Last potentially related work creation: [ 39.041403] kasan_save_stack+0x22/0x50 [ 39.041899] __kasan_record_aux_stack+0x8e/0xa0 [ 39.042469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.043103] remove_vma+0x139/0x170 [ 39.043551] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.044102] do_vmi_munmap+0x1f1/0x2b0 [ 39.044596] __vm_munmap+0x138/0x3a0 [ 39.045060] __x64_sys_munmap+0x59/0x80 [ 39.045550] do_syscall_64+0x3f/0x90 [ 39.046021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.046666] [ 39.046888] Second to last potentially related work creation: [ 39.047574] kasan_save_stack+0x22/0x50 [ 39.048070] __kasan_record_aux_stack+0x8e/0xa0 [ 39.048647] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.049281] remove_vma+0x139/0x170 [ 39.049738] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.050299] do_vmi_munmap+0x1f1/0x2b0 [ 39.050779] mmap_region+0x1f9/0x2660 [ 39.051251] do_mmap+0x854/0xf00 [ 39.051683] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.052170] ksys_mmap_pgoff+0x3af/0x500 [ 39.052695] do_syscall_64+0x3f/0x90 [ 39.053166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.053808] [ 39.054027] The buggy address belongs to the object at ffff88800eb97570 [ 39.054027] which belongs to the cache vm_area_struct of size 168 [ 39.055480] The buggy address is located 88 bytes inside of [ 39.055480] freed 168-byte region [ffff88800eb97570, ffff88800eb97618) [ 39.056892] [ 39.057105] The buggy address belongs to the physical page: [ 39.057760] page:00000000742c1feb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb97 [ 39.058851] memcg:ffff88800ecd0701 [ 39.059275] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.059976] page_type: 0xffffffff() [ 39.060422] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b35c0 dead000000000003 [ 39.061353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecd0701 [ 39.062251] page dumped because: kasan: bad access detected [ 39.062909] [ 39.063124] Memory state around the buggy address: [ 39.063697] ffff88800eb97480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.064550] ffff88800eb97500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.065400] >ffff88800eb97580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.066239] ^ [ 39.066896] ffff88800eb97600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.067734] ffff88800eb97680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.068585] ================================================================== [ 39.069559] Disabling lock debugging due to kernel taint [ 41.483302] BUG: Bad rss-counter state mm:00000000306f45bd type:MM_FILEPAGES val:33 [ 41.484324] BUG: Bad rss-counter state mm:00000000306f45bd type:MM_ANONPAGES val:22 [ 42.064294] BUG: Bad rss-counter state mm:000000007b45b45a type:MM_FILEPAGES val:33 [ 42.065492] BUG: Bad rss-counter state mm:000000007b45b45a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57729' (ECDSA) to the list of known hosts. 2023/06/20 17:38:03 fuzzer started 2023/06/20 17:38:03 dialing manager at localhost:36067 2023/06/20 17:38:03 checking machine... 2023/06/20 17:38:03 checking revisions... [ 42.723105] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:38:03 testing simple program... [ 42.777587] cgroup: Unknown subsys name 'net' [ 42.823213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:38:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000040 RCX=ffff88801690fc84 RDX=1ffffffff0a828e0 RSI=ffffffff818a4fe4 RDI=ffff88801690fc80 RBP=ffff88801690fb00 RSP=ffff88801690fa68 R8 =0000000000000005 R9 =ffffffff818a552f R10=0000000000000000 R11=00000000000b6a61 R12=ffff88801690fc48 R13=0000000000000400 R14=ffffffff85414700 R15=ffff88801690fdf0 RIP=ffffffff818a507a 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 00007fd7aa900900 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=00007ffd3652a000 CR3=000000000fd38000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=ffff888008c04400 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=00007f7743d5f150 CR3=000000000960a000 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=d2862dee8da2e6943c419496b733fb65 XMM02=ec2efd57dc4c00df000000000011b8b8 XMM03=4a284896550c1465000000000011b988 XMM04=8db0beaa8a91151b00000000000ae988 XMM05=146ca84228813df700000000001343d8 XMM06=4fda316b135da52b00000000001330b8 XMM07=e042d86d42eb936e00000000001225a0 XMM08=4a284896550c1465000000000011b988 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000