syzkaller login: [ 60.810816] BUG: Bad rss-counter state mm:0000000015ef9cc1 type:MM_FILEPAGES val:33 [ 60.812278] BUG: Bad rss-counter state mm:0000000015ef9cc1 type:MM_ANONPAGES val:22 [ 60.958117] ================================================================== [ 60.959024] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.959961] Read of size 8 at addr ffff88800c6fd058 by task sshd/220 [ 60.960847] [ 60.961068] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.961973] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.962979] Call Trace: [ 60.963306] [ 60.963598] dump_stack_lvl+0x91/0xf0 [ 60.964096] print_report+0xcc/0x620 [ 60.964591] ? __virt_addr_valid+0x102/0x340 [ 60.965165] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.965811] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.966440] kasan_report+0xbe/0xf0 [ 60.966928] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.967565] vma_interval_tree_remove+0xc75/0xec0 [ 60.968174] vma_prepare+0xc54/0x11a0 [ 60.968657] __split_vma+0x5af/0x950 [ 60.969141] ? __pfx___split_vma+0x10/0x10 [ 60.969689] ? find_held_lock+0x2c/0x110 [ 60.970212] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.970781] ? lock_is_held_type+0x9f/0x120 [ 60.971323] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.971931] ? mtree_range_walk+0x632/0x900 [ 60.972490] ? mas_walk+0x5c7/0x7c0 [ 60.972970] do_vmi_munmap+0x1f1/0x2b0 [ 60.973490] mmap_region+0x1f9/0x2660 [ 60.974020] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.974538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.975280] ? __pfx_lock_acquire+0x10/0x10 [ 60.975845] ? __pfx_mmap_region+0x10/0x10 [ 60.976389] ? security_mmap_addr+0x7d/0xa0 [ 60.976963] ? get_unmapped_area+0x1f5/0x3f0 [ 60.977545] do_mmap+0x854/0xf00 [ 60.978007] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.978520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.979113] ksys_mmap_pgoff+0x3af/0x500 [ 60.979636] do_syscall_64+0x3f/0x90 [ 60.980119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.980790] RIP: 0033:0x7f42f5434d82 [ 60.981266] 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 [ 60.983450] RSP: 002b:00007ffec34a11a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.984390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42f5434d82 [ 60.985271] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42f486e000 [ 60.986148] RBP: 00007f42f486e000 R08: 0000000000000009 R09: 0000000000001000 [ 60.987007] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7d4901f70 [ 60.987881] R13: 00007ffec34a11c0 R14: 00007ffec34a11f0 R15: 00007ffec34a1550 [ 60.988785] [ 60.989090] [ 60.989308] Allocated by task 213: [ 60.989783] kasan_save_stack+0x22/0x50 [ 60.990293] kasan_set_track+0x25/0x30 [ 60.990812] __kasan_slab_alloc+0x59/0x70 [ 60.991341] kmem_cache_alloc+0x16b/0x370 [ 60.991908] vm_area_dup+0x20/0x160 [ 60.992368] __split_vma+0x170/0x950 [ 60.992950] split_vma+0xc6/0x110 [ 60.993566] mprotect_fixup+0x8d2/0xb30 [ 60.994249] do_mprotect_pkey+0x87e/0xd40 [ 60.994945] __x64_sys_mprotect+0x78/0xc0 [ 60.995645] do_syscall_64+0x3f/0x90 [ 60.996272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.997136] [ 60.997433] Freed by task 213: [ 60.997879] kasan_save_stack+0x22/0x50 [ 60.998395] kasan_set_track+0x25/0x30 [ 60.998919] kasan_save_free_info+0x2b/0x50 [ 60.999455] __kasan_slab_free+0x10a/0x190 [ 61.000013] kmem_cache_free+0x10d/0x4d0 [ 61.000530] rcu_core+0x8c8/0x2860 [ 61.001001] __do_softirq+0x1b7/0x7d4 [ 61.001508] [ 61.001745] Last potentially related work creation: [ 61.002391] kasan_save_stack+0x22/0x50 [ 61.002923] __kasan_record_aux_stack+0x8e/0xa0 [ 61.003495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.004165] remove_vma+0x139/0x170 [ 61.004626] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.005211] do_vmi_munmap+0x1f1/0x2b0 [ 61.005730] __vm_munmap+0x138/0x3a0 [ 61.006206] __x64_sys_munmap+0x59/0x80 [ 61.006732] do_syscall_64+0x3f/0x90 [ 61.007225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.007889] [ 61.008106] The buggy address belongs to the object at ffff88800c6fd000 [ 61.008106] which belongs to the cache vm_area_struct of size 168 [ 61.009640] The buggy address is located 88 bytes inside of [ 61.009640] freed 168-byte region [ffff88800c6fd000, ffff88800c6fd0a8) [ 61.011079] [ 61.011301] The buggy address belongs to the physical page: [ 61.011985] page:00000000877d3c70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6fd [ 61.013092] memcg:ffff88800dac7a01 [ 61.013549] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.014215] page_type: 0xffffffff() [ 61.014696] raw: 0100000000000200 ffff8880087a0c80 ffffea0000316a40 dead000000000002 [ 61.015636] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dac7a01 [ 61.016552] page dumped because: kasan: bad access detected [ 61.017238] [ 61.017475] Memory state around the buggy address: [ 61.018096] ffff88800c6fcf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.018995] ffff88800c6fcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.019885] >ffff88800c6fd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.020804] ^ [ 61.021713] ffff88800c6fd080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 61.022594] ffff88800c6fd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.023462] ================================================================== [ 61.024442] Disabling lock debugging due to kernel taint [ 63.688485] BUG: Bad rss-counter state mm:00000000cd33749c type:MM_FILEPAGES val:33 [ 63.690074] BUG: Bad rss-counter state mm:00000000cd33749c type:MM_ANONPAGES val:22 [ 64.132611] BUG: Bad rss-counter state mm:00000000b98b6ff7 type:MM_FILEPAGES val:33 [ 64.133359] BUG: Bad rss-counter state mm:00000000b98b6ff7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11476' (ECDSA) to the list of known hosts. 2023/06/20 13:56:35 fuzzer started 2023/06/20 13:56:35 dialing manager at localhost:36067 2023/06/20 13:56:35 checking machine... 2023/06/20 13:56:35 checking revisions... [ 64.811897] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:56:35 testing simple program... [ 64.866925] cgroup: Unknown subsys name 'net' [ 64.903959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:56:35 Registers: info registers vcpu 0 RAX=ffff88800f0b7c90 RBX=ffff88801995b1a0 RCX=0000000000000000 RDX=1ffff11001e16f91 RSI=ffffffff8189dac0 RDI=0000000000000001 RBP=ffff88800f0b7c80 RSP=ffff88800f0b7a90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=ffff88800f0b7c88 R14=ffff88800f0b7c80 R15=ffff88800f0b7c48 RIP=ffffffff8189dae9 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 00007f16b622e900 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=00007ffc97e98000 CR3=000000001a1e2000 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=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=00007fe2d1633610 CR3=000000000d900000 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=e8944a27e4bdf796be402566287c40b5 XMM02=000000000011a740ec2efd57dc4c00df XMM03=0000000000121cb8d28c3e54745be019 XMM04=8c52b4e0e635635e00000000000ae988 XMM05=73f532ff46c448c70000000000132980 XMM06=4fda316b135da52b0000000000131a20 XMM07=e042d86d42eb936e0000000000121f38 XMM08=d28c3e54745be019000000000011a7a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000