syzkaller login: [ 60.809000] BUG: Bad rss-counter state mm:00000000abda3911 type:MM_FILEPAGES val:33 [ 60.810022] BUG: Bad rss-counter state mm:00000000abda3911 type:MM_ANONPAGES val:22 [ 60.988980] ================================================================== [ 60.990292] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.991501] Read of size 8 at addr ffff888009471058 by task sshd/220 [ 60.992533] [ 60.992817] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.993934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.995266] Call Trace: [ 60.995688] [ 60.996065] dump_stack_lvl+0x91/0xf0 [ 60.996704] print_report+0xcc/0x620 [ 60.997351] ? __virt_addr_valid+0x102/0x340 [ 60.998063] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.998888] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.999820] kasan_report+0xbe/0xf0 [ 61.000553] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.001514] vma_interval_tree_remove+0xc75/0xec0 [ 61.002476] vma_prepare+0xc54/0x11a0 [ 61.003221] __split_vma+0x5af/0x950 [ 61.003953] ? __pfx___split_vma+0x10/0x10 [ 61.004777] ? find_held_lock+0x2c/0x110 [ 61.005582] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.006482] ? lock_is_held_type+0x9f/0x120 [ 61.007154] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.007882] ? mtree_range_walk+0x632/0x900 [ 61.008529] ? mas_walk+0x5c7/0x7c0 [ 61.009100] do_vmi_munmap+0x1f1/0x2b0 [ 61.009684] mmap_region+0x1f9/0x2660 [ 61.010316] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.010946] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.011791] ? __pfx_lock_acquire+0x10/0x10 [ 61.012441] ? __pfx_mmap_region+0x10/0x10 [ 61.013082] ? security_mmap_addr+0x7d/0xa0 [ 61.013711] ? get_unmapped_area+0x1f5/0x3f0 [ 61.014400] do_mmap+0x854/0xf00 [ 61.014941] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.015529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.016205] ksys_mmap_pgoff+0x3af/0x500 [ 61.016808] do_syscall_64+0x3f/0x90 [ 61.017406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.018225] RIP: 0033:0x7f369d18ad82 [ 61.018775] 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 [ 61.021352] RSP: 002b:00007ffe1839d918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.022467] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f369d18ad82 [ 61.023493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f369c5c4000 [ 61.024514] RBP: 00007f369c5c4000 R08: 0000000000000009 R09: 0000000000001000 [ 61.025535] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac36725f70 [ 61.026576] R13: 00007ffe1839d930 R14: 00007ffe1839d960 R15: 00007ffe1839dcc0 [ 61.027617] [ 61.027974] [ 61.028226] Allocated by task 213: [ 61.028734] kasan_save_stack+0x22/0x50 [ 61.029350] kasan_set_track+0x25/0x30 [ 61.029964] __kasan_slab_alloc+0x59/0x70 [ 61.030610] kmem_cache_alloc+0x16b/0x370 [ 61.031234] vm_area_dup+0x20/0x160 [ 61.031773] __split_vma+0x170/0x950 [ 61.032339] split_vma+0xc6/0x110 [ 61.032874] mprotect_fixup+0x8d2/0xb30 [ 61.033471] do_mprotect_pkey+0x87e/0xd40 [ 61.034110] __x64_sys_mprotect+0x78/0xc0 [ 61.034736] do_syscall_64+0x3f/0x90 [ 61.035319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.036097] [ 61.036350] Freed by task 213: [ 61.036821] kasan_save_stack+0x22/0x50 [ 61.037430] kasan_set_track+0x25/0x30 [ 61.038082] kasan_save_free_info+0x2b/0x50 [ 61.038888] __kasan_slab_free+0x10a/0x190 [ 61.039708] kmem_cache_free+0x10d/0x4d0 [ 61.040471] rcu_core+0x8c8/0x2860 [ 61.041117] __do_softirq+0x1b7/0x7d4 [ 61.041825] [ 61.042159] Last potentially related work creation: [ 61.043083] kasan_save_stack+0x22/0x50 [ 61.043854] __kasan_record_aux_stack+0x8e/0xa0 [ 61.044747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.045730] remove_vma+0x139/0x170 [ 61.046434] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.047277] do_vmi_munmap+0x1f1/0x2b0 [ 61.048015] __vm_munmap+0x138/0x3a0 [ 61.048669] __x64_sys_munmap+0x59/0x80 [ 61.049375] do_syscall_64+0x3f/0x90 [ 61.050049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.050991] [ 61.051294] The buggy address belongs to the object at ffff888009471000 [ 61.051294] which belongs to the cache vm_area_struct of size 168 [ 61.053397] The buggy address is located 88 bytes inside of [ 61.053397] freed 168-byte region [ffff888009471000, ffff8880094710a8) [ 61.055422] [ 61.055723] The buggy address belongs to the physical page: [ 61.056660] page:00000000a9143d5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9471 [ 61.058226] memcg:ffff88800cee4601 [ 61.058835] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.059828] page_type: 0xffffffff() [ 61.060459] raw: 0100000000000200 ffff8880087a0c80 ffffea0000362680 dead000000000005 [ 61.061756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cee4601 [ 61.063061] page dumped because: kasan: bad access detected [ 61.063995] [ 61.064288] Memory state around the buggy address: [ 61.065106] ffff888009470f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 61.066324] ffff888009470f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.067528] >ffff888009471000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.068695] ^ [ 61.069712] ffff888009471080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 61.071051] ffff888009471100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.072339] ================================================================== [ 61.073608] Disabling lock debugging due to kernel taint [ 62.970982] BUG: Bad rss-counter state mm:000000007f63fd18 type:MM_FILEPAGES val:33 [ 62.971977] BUG: Bad rss-counter state mm:000000007f63fd18 type:MM_ANONPAGES val:22 [ 63.424727] BUG: Bad rss-counter state mm:00000000914c5c02 type:MM_FILEPAGES val:33 [ 63.425926] BUG: Bad rss-counter state mm:00000000914c5c02 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4373' (ECDSA) to the list of known hosts. 2023/06/20 12:15:14 fuzzer started 2023/06/20 12:15:14 dialing manager at localhost:36067 2023/06/20 12:15:14 checking machine... 2023/06/20 12:15:14 checking revisions... [ 64.164204] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:15:15 testing simple program... [ 64.211014] cgroup: Unknown subsys name 'net' [ 64.254116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:15:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8363eb21 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff888009a67ed8 RDI=ffffffff8363eb21 RBP=ffffffff8363eb21 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008aaa5 R12=0000000000000001 R13=0000000000000000 R14=ffff888016801b40 R15=ffff88800c65c380 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f3d7fbbb900 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=00007ffeb32ee000 CR3=000000000f748000 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=00007f91b855ceb0 CR3=000000000fcac000 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=2034313a35313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a35313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000