syzkaller login: [ 87.907756] BUG: Bad rss-counter state mm:000000009fc88621 type:MM_FILEPAGES val:33 [ 87.908984] BUG: Bad rss-counter state mm:000000009fc88621 type:MM_ANONPAGES val:22 [ 87.945680] ================================================================== [ 87.946854] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 87.947958] Read of size 8 at addr ffff888019b54140 by task sshd/228 [ 87.948980] [ 87.949258] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 87.950193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 87.951245] Call Trace: [ 87.951593] <TASK> [ 87.952036] dump_stack_lvl+0x91/0xf0 [ 87.952622] print_report+0xcc/0x620 [ 87.953163] ? __virt_addr_valid+0x102/0x340 [ 87.953900] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.954780] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.955484] kasan_report+0xbe/0xf0 [ 87.956108] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.957002] vma_interval_tree_remove+0xc75/0xec0 [ 87.957882] vma_prepare+0xc54/0x11a0 [ 87.958443] __split_vma+0x5af/0x950 [ 87.958996] ? __pfx___split_vma+0x10/0x10 [ 87.959619] ? find_held_lock+0x2c/0x110 [ 87.960230] do_vmi_align_munmap+0x2ba/0x11f0 [ 87.960927] ? lock_is_held_type+0x9f/0x120 [ 87.961558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 87.962292] ? mtree_range_walk+0x632/0x900 [ 87.962954] ? mas_walk+0x5c7/0x7c0 [ 87.963501] do_vmi_munmap+0x1f1/0x2b0 [ 87.964082] mmap_region+0x1f9/0x2660 [ 87.964657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 87.965286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 87.966116] ? __pfx_lock_acquire+0x10/0x10 [ 87.966759] ? __pfx_mmap_region+0x10/0x10 [ 87.967381] ? security_mmap_addr+0x7d/0xa0 [ 87.968003] ? get_unmapped_area+0x1f5/0x3f0 [ 87.968661] do_mmap+0x854/0xf00 [ 87.969168] vm_mmap_pgoff+0x1a6/0x3a0 [ 87.969727] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 87.970379] ksys_mmap_pgoff+0x3af/0x500 [ 87.970959] do_syscall_64+0x3f/0x90 [ 87.971514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.972286] RIP: 0033:0x7fbe6121dd82 [ 87.972822] 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 [ 87.975578] RSP: 002b:00007ffeaa63f9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 87.976666] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe6121dd82 [ 87.977702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe60657000 [ 87.978708] RBP: 00007fbe60657000 R08: 0000000000000009 R09: 0000000000001000 [ 87.979691] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650839faec0 [ 87.980673] R13: 00007ffeaa63f9c0 R14: 00007ffeaa63f9f0 R15: 00007ffeaa63fd50 [ 87.981662] </TASK> [ 87.981987] [ 87.982231] Allocated by task 220: [ 87.982723] kasan_save_stack+0x22/0x50 [ 87.983281] kasan_set_track+0x25/0x30 [ 87.983829] __kasan_slab_alloc+0x59/0x70 [ 87.984399] kmem_cache_alloc+0x16b/0x370 [ 87.984976] vm_area_dup+0x20/0x160 [ 87.985455] __split_vma+0x170/0x950 [ 87.985959] split_vma+0xc6/0x110 [ 87.986435] mprotect_fixup+0x8d2/0xb30 [ 87.986970] do_mprotect_pkey+0x87e/0xd40 [ 87.987529] __x64_sys_mprotect+0x78/0xc0 [ 87.988094] do_syscall_64+0x3f/0x90 [ 87.988598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.989297] [ 87.989523] Freed by task 202: [ 87.989940] kasan_save_stack+0x22/0x50 [ 87.990469] kasan_set_track+0x25/0x30 [ 87.991003] kasan_save_free_info+0x2b/0x50 [ 87.991568] __kasan_slab_free+0x10a/0x190 [ 87.992139] kmem_cache_free+0x10d/0x4d0 [ 87.992674] rcu_core+0x8c8/0x2860 [ 87.993170] __do_softirq+0x1b7/0x7d4 [ 87.993674] [ 87.993902] Last potentially related work creation: [ 87.994528] kasan_save_stack+0x22/0x50 [ 87.995065] __kasan_record_aux_stack+0x8e/0xa0 [ 87.995670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 87.996362] remove_vma+0x139/0x170 [ 87.996847] do_vmi_align_munmap+0xd4a/0x11f0 [ 87.997439] do_vmi_munmap+0x1f1/0x2b0 [ 87.997953] __vm_munmap+0x138/0x3a0 [ 87.998449] __x64_sys_munmap+0x59/0x80 [ 87.998975] do_syscall_64+0x3f/0x90 [ 87.999513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.000225] [ 88.000463] The buggy address belongs to the object at ffff888019b540e8 [ 88.000463] which belongs to the cache vm_area_struct of size 168 [ 88.002120] The buggy address is located 88 bytes inside of [ 88.002120] freed 168-byte region [ffff888019b540e8, ffff888019b54190) [ 88.003693] [ 88.003930] The buggy address belongs to the physical page: [ 88.004667] page:000000008ea39d8f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b54 [ 88.005896] memcg:ffff88800eb56701 [ 88.006369] flags: 0x100000000000200(slab|node=0|zone=1) [ 88.007082] page_type: 0xffffffff() [ 88.007582] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 88.008595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb56701 [ 88.009568] page dumped because: kasan: bad access detected [ 88.010292] [ 88.010534] Memory state around the buggy address: [ 88.011181] ffff888019b54000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 88.012092] ffff888019b54080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 88.013025] >ffff888019b54100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 88.013932] ^ [ 88.014610] ffff888019b54180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 88.015521] ffff888019b54200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 88.016425] ================================================================== [ 88.017770] Disabling lock debugging due to kernel taint [ 90.026596] BUG: Bad rss-counter state mm:00000000496c2407 type:MM_FILEPAGES val:33 [ 90.027638] BUG: Bad rss-counter state mm:00000000496c2407 type:MM_ANONPAGES val:22 [ 90.531850] BUG: Bad rss-counter state mm:000000001d34f2d7 type:MM_FILEPAGES val:33 [ 90.533365] BUG: Bad rss-counter state mm:000000001d34f2d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38512' (ECDSA) to the list of known hosts. 2023/06/20 05:35:22 fuzzer started 2023/06/20 05:35:22 dialing manager at localhost:44161 2023/06/20 05:35:22 checking machine... 2023/06/20 05:35:22 checking revisions... [ 91.288861] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:35:22 testing simple program... [ 91.328544] cgroup: Unknown subsys name 'net' [ 91.373566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:35:03 Registers: info registers vcpu 0 RAX=be449a92c69a4d12 RBX=00007fb6b75a75d8 RCX=00007fb6b75a6b09 RDX=0000000000000061 RSI=e70c38cc637e5a40 RDI=00007fb6b75a6af5 RBP=00007fff2593f1b0 RSP=00007fff2593efd0 R8 =0000000000000000 R9 =0000000000000001 R10=00007fb6b75acfd0 R11=00007fb6b75e2510 R12=00007fb6b75a6af5 R13=00007fff2593f138 R14=00007fb6b75a5d98 R15=00007fb6b75e2510 RIP=00007fb6b75f2c0e RFL=00000287 [--S--PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb6b6a71900 00000000 00000000 GS =0000 0000000000000000 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=00007fb6b74ee000 CR3=000000000ef96000 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=0000000000ff000000000000000000ff XMM01=00000000000100ffffffffffffffff00 XMM02=494c4700362e322e325f4342494c4700 XMM03=00000000000000000000000000004700 XMM04=4342494c4700362e322e325f4342494c XMM05=00007fb6b702af6000007fb6b71e4950 XMM06=00007fb6b71e444000007fb6b71e3f20 XMM07=00007fb6b6b2e12000007fb6b6b2db10 XMM08=00007fb6b6b2d5f000007fb6b6b2d060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff846014ea RBP=0000000000000000 RSP=ffff88800fdd7ad0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450b8a4 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 00007f33c8a1c900 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=00007ffeb03c0000 CR3=000000000f5dc000 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=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