syzkaller login: [ 30.450138] BUG: Bad rss-counter state mm:0000000003fdb580 type:MM_FILEPAGES val:33 [ 30.451339] BUG: Bad rss-counter state mm:0000000003fdb580 type:MM_ANONPAGES val:22 [ 30.480583] ================================================================== [ 30.481315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.482048] Read of size 8 at addr ffff8880199ef228 by task sshd/220 [ 30.482639] [ 30.482807] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.483470] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.484215] Call Trace: [ 30.484459] [ 30.484676] dump_stack_lvl+0x91/0xf0 [ 30.485053] print_report+0xcc/0x620 [ 30.485433] ? __virt_addr_valid+0x102/0x340 [ 30.485887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.486350] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.486685] kasan_report+0xbe/0xf0 [ 30.486947] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.487290] vma_interval_tree_remove+0xc75/0xec0 [ 30.487617] vma_prepare+0xc54/0x11a0 [ 30.487879] __split_vma+0x5af/0x950 [ 30.488138] ? __pfx___split_vma+0x10/0x10 [ 30.488426] ? find_held_lock+0x2c/0x110 [ 30.488711] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.489021] ? lock_is_held_type+0x9f/0x120 [ 30.489318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.489678] ? mtree_range_walk+0x632/0x900 [ 30.489997] ? mas_walk+0x5c7/0x7c0 [ 30.490275] do_vmi_munmap+0x1f1/0x2b0 [ 30.490555] mmap_region+0x1f9/0x2660 [ 30.490830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.491123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.491525] ? __pfx_lock_acquire+0x10/0x10 [ 30.491828] ? __pfx_mmap_region+0x10/0x10 [ 30.492133] ? security_mmap_addr+0x7d/0xa0 [ 30.492442] ? get_unmapped_area+0x1f5/0x3f0 [ 30.492755] do_mmap+0x854/0xf00 [ 30.493101] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.493393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.493725] ksys_mmap_pgoff+0x3af/0x500 [ 30.494019] do_syscall_64+0x3f/0x90 [ 30.494306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.494679] RIP: 0033:0x7f25897e4d82 [ 30.494953] 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 [ 30.496200] RSP: 002b:00007ffd7bf3f208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.496717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25897e4d82 [ 30.497209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2588c1e000 [ 30.497709] RBP: 00007f2588c1e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.498200] R10: 0000000000000812 R11: 0000000000000206 R12: 000056552b945ec0 [ 30.498686] R13: 00007ffd7bf3f220 R14: 00007ffd7bf3f250 R15: 00007ffd7bf3f5b0 [ 30.499199] [ 30.499369] [ 30.499494] Allocated by task 213: [ 30.499752] kasan_save_stack+0x22/0x50 [ 30.500051] kasan_set_track+0x25/0x30 [ 30.500336] __kasan_slab_alloc+0x59/0x70 [ 30.500637] kmem_cache_alloc+0x16b/0x370 [ 30.500937] vm_area_dup+0x20/0x160 [ 30.501207] __split_vma+0x170/0x950 [ 30.501481] split_vma+0xc6/0x110 [ 30.501739] mprotect_fixup+0x8d2/0xb30 [ 30.502029] do_mprotect_pkey+0x87e/0xd40 [ 30.502332] __x64_sys_mprotect+0x78/0xc0 [ 30.502636] do_syscall_64+0x3f/0x90 [ 30.502916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503287] [ 30.503409] Freed by task 213: [ 30.503640] kasan_save_stack+0x22/0x50 [ 30.503937] kasan_set_track+0x25/0x30 [ 30.504222] kasan_save_free_info+0x2b/0x50 [ 30.504523] __kasan_slab_free+0x10a/0x190 [ 30.504833] kmem_cache_free+0x10d/0x4d0 [ 30.505130] rcu_core+0x8c8/0x2860 [ 30.505390] __do_softirq+0x1b7/0x7d4 [ 30.505673] [ 30.505800] Last potentially related work creation: [ 30.506137] kasan_save_stack+0x22/0x50 [ 30.506427] __kasan_record_aux_stack+0x8e/0xa0 [ 30.506765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.507136] remove_vma+0x139/0x170 [ 30.507407] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.507721] do_vmi_munmap+0x1f1/0x2b0 [ 30.508006] __vm_munmap+0x138/0x3a0 [ 30.508279] __x64_sys_munmap+0x59/0x80 [ 30.508569] do_syscall_64+0x3f/0x90 [ 30.508851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.509229] [ 30.509357] The buggy address belongs to the object at ffff8880199ef1d0 [ 30.509357] which belongs to the cache vm_area_struct of size 168 [ 30.510215] The buggy address is located 88 bytes inside of [ 30.510215] freed 168-byte region [ffff8880199ef1d0, ffff8880199ef278) [ 30.511024] [ 30.511146] The buggy address belongs to the physical page: [ 30.511539] page:000000007e33cc0c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199ef [ 30.512174] memcg:ffff8880187feb01 [ 30.512431] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.512812] page_type: 0xffffffff() [ 30.513071] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.513611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880187feb01 [ 30.514145] page dumped because: kasan: bad access detected [ 30.514528] [ 30.514649] Memory state around the buggy address: [ 30.514979] ffff8880199ef100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.515472] ffff8880199ef180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.515957] >ffff8880199ef200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.516454] ^ [ 30.516777] ffff8880199ef280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.517267] ffff8880199ef300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.517765] ================================================================== [ 30.518356] Disabling lock debugging due to kernel taint [ 32.349518] BUG: Bad rss-counter state mm:00000000e8bba4d5 type:MM_FILEPAGES val:33 [ 32.350953] BUG: Bad rss-counter state mm:00000000e8bba4d5 type:MM_ANONPAGES val:22 [ 32.814475] BUG: Bad rss-counter state mm:0000000019e5fe59 type:MM_FILEPAGES val:33 [ 32.815483] BUG: Bad rss-counter state mm:0000000019e5fe59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42510' (ECDSA) to the list of known hosts. 2023/06/21 10:33:12 fuzzer started 2023/06/21 10:33:12 dialing manager at localhost:36067 2023/06/21 10:33:12 checking machine... 2023/06/21 10:33:12 checking revisions... [ 33.526970] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:33:12 testing simple program... [ 33.575479] cgroup: Unknown subsys name 'net' [ 33.629700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:33:12 Registers: info registers vcpu 0 RAX=1ffff1100225df69 RBX=ffff8880112efb18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880112efb48 RBP=ffff88800ece8400 RSP=ffff88800f267b88 R8 =0000000000000001 R9 =ffffed1001e4cf65 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800ece8400 R14=ffffffff81ef57e8 R15=0000000000000000 RIP=ffffffff818464e2 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 00007f44f815a900 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=00007fd670cd5000 CR3=000000000ef50000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffe4be11438 CR3=000000000ca88000 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=33333a3031203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000