syzkaller login: [ 31.371085] BUG: Bad rss-counter state mm:00000000192d9f83 type:MM_FILEPAGES val:33 [ 31.372077] BUG: Bad rss-counter state mm:00000000192d9f83 type:MM_ANONPAGES val:22 [ 31.541228] ================================================================== [ 31.543067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.545100] Read of size 8 at addr ffff888016d6d228 by task sshd/221 [ 31.547371] [ 31.547737] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.549489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.551553] Call Trace: [ 31.552133] [ 31.552666] dump_stack_lvl+0x91/0xf0 [ 31.553577] print_report+0xcc/0x620 [ 31.554523] ? __virt_addr_valid+0x102/0x340 [ 31.555564] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.556794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.567721] kasan_report+0xbe/0xf0 [ 31.568548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.573185] vma_interval_tree_remove+0xc75/0xec0 [ 31.574304] vma_prepare+0xc54/0x11a0 [ 31.575195] __split_vma+0x5af/0x950 [ 31.576019] ? __pfx___split_vma+0x10/0x10 [ 31.576965] ? find_held_lock+0x2c/0x110 [ 31.577917] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.578881] ? lock_is_held_type+0x9f/0x120 [ 31.579819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.580818] ? mtree_range_walk+0x632/0x900 [ 31.581811] ? mas_walk+0x5c7/0x7c0 [ 31.582661] do_vmi_munmap+0x1f1/0x2b0 [ 31.583538] mmap_region+0x1f9/0x2660 [ 31.586404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.587398] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.588739] ? __pfx_lock_acquire+0x10/0x10 [ 31.589690] ? __pfx_mmap_region+0x10/0x10 [ 31.590679] ? security_mmap_addr+0x7d/0xa0 [ 31.591644] ? get_unmapped_area+0x1f5/0x3f0 [ 31.592603] do_mmap+0x854/0xf00 [ 31.593392] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.594256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.595294] ksys_mmap_pgoff+0x3af/0x500 [ 31.596225] do_syscall_64+0x3f/0x90 [ 31.597052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.598231] RIP: 0033:0x7fb9a72a8d82 [ 31.600683] 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 [ 31.604829] RSP: 002b:00007ffd2e030748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.606506] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9a72a8d82 [ 31.608662] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9a66e2000 [ 31.610228] RBP: 00007fb9a66e2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.612070] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563300737ec0 [ 31.613613] R13: 00007ffd2e030760 R14: 00007ffd2e030790 R15: 00007ffd2e030af0 [ 31.615285] [ 31.615802] [ 31.616166] Allocated by task 214: [ 31.616950] kasan_save_stack+0x22/0x50 [ 31.617853] kasan_set_track+0x25/0x30 [ 31.618723] __kasan_slab_alloc+0x59/0x70 [ 31.619729] kmem_cache_alloc+0x16b/0x370 [ 31.620655] vm_area_dup+0x20/0x160 [ 31.621918] __split_vma+0x170/0x950 [ 31.622736] split_vma+0xc6/0x110 [ 31.623534] mprotect_fixup+0x8d2/0xb30 [ 31.624499] do_mprotect_pkey+0x87e/0xd40 [ 31.625441] __x64_sys_mprotect+0x78/0xc0 [ 31.626343] do_syscall_64+0x3f/0x90 [ 31.627204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.628390] [ 31.628756] Freed by task 214: [ 31.629466] kasan_save_stack+0x22/0x50 [ 31.630403] kasan_set_track+0x25/0x30 [ 31.631317] kasan_save_free_info+0x2b/0x50 [ 31.632281] __kasan_slab_free+0x10a/0x190 [ 31.633258] kmem_cache_free+0x10d/0x4d0 [ 31.634152] rcu_core+0x8c8/0x2860 [ 31.634963] __do_softirq+0x1b7/0x7d4 [ 31.635851] [ 31.636200] Last potentially related work creation: [ 31.637284] kasan_save_stack+0x22/0x50 [ 31.638206] __kasan_record_aux_stack+0x8e/0xa0 [ 31.639234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.640406] remove_vma+0x139/0x170 [ 31.641770] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.642799] do_vmi_munmap+0x1f1/0x2b0 [ 31.643717] __vm_munmap+0x138/0x3a0 [ 31.644550] __x64_sys_munmap+0x59/0x80 [ 31.645408] do_syscall_64+0x3f/0x90 [ 31.646227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647188] [ 31.647336] The buggy address belongs to the object at ffff888016d6d1d0 [ 31.647336] which belongs to the cache vm_area_struct of size 168 [ 31.648358] The buggy address is located 88 bytes inside of [ 31.648358] freed 168-byte region [ffff888016d6d1d0, ffff888016d6d278) [ 31.649304] [ 31.655338] The buggy address belongs to the physical page: [ 31.655795] page:00000000424b826a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d6d [ 31.656540] memcg:ffff88800c589701 [ 31.656833] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.657308] page_type: 0xffffffff() [ 31.657616] raw: 0100000000000200 ffff8880087a0c80 ffffea000050e780 dead000000000005 [ 31.658251] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c589701 [ 31.658890] page dumped because: kasan: bad access detected [ 31.659362] [ 31.659510] Memory state around the buggy address: [ 31.659922] ffff888016d6d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.660534] ffff888016d6d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.661145] >ffff888016d6d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.661719] ^ [ 31.662097] ffff888016d6d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.662680] ffff888016d6d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.663310] ================================================================== [ 31.664038] Disabling lock debugging due to kernel taint [ 34.638134] BUG: Bad rss-counter state mm:000000000b5aacc6 type:MM_FILEPAGES val:33 [ 34.638864] BUG: Bad rss-counter state mm:000000000b5aacc6 type:MM_ANONPAGES val:22 [ 36.027158] BUG: Bad rss-counter state mm:000000007dbbfc7a type:MM_FILEPAGES val:33 [ 36.027990] BUG: Bad rss-counter state mm:000000007dbbfc7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56561' (ECDSA) to the list of known hosts. 2023/06/21 10:11:02 fuzzer started 2023/06/21 10:11:02 dialing manager at localhost:36067 2023/06/21 10:11:02 checking machine... 2023/06/21 10:11:02 checking revisions... [ 36.985747] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:11:03 testing simple program... [ 37.060781] cgroup: Unknown subsys name 'net' [ 37.163140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:11:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd82c754328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000215 RCX=0000000000000000 RDX=ffff8880165051c0 RSI=ffffffff8171b3b7 RDI=ffffffff8171b3bc RBP=ffff88800ff5a000 RSP=ffff888016aef990 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000038 R12=0000000000000000 R13=00007ffede12c340 R14=0000000000000200 R15=0000000000000000 RIP=ffffffff815343b0 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 00007f0220fe5900 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=00007ffede12c340 CR3=000000000fdbc000 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=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