syzkaller login: [ 38.297070] BUG: Bad rss-counter state mm:000000001b3221ae type:MM_FILEPAGES val:33 [ 38.298275] BUG: Bad rss-counter state mm:000000001b3221ae type:MM_ANONPAGES val:22 [ 38.342735] ================================================================== [ 38.343783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.344720] Read of size 8 at addr ffff888009f024e0 by task sshd/221 [ 38.345489] [ 38.345708] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.346581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.347575] Call Trace: [ 38.347898] [ 38.348180] dump_stack_lvl+0x91/0xf0 [ 38.348672] print_report+0xcc/0x620 [ 38.349155] ? __virt_addr_valid+0x102/0x340 [ 38.349698] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.350314] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.350929] kasan_report+0xbe/0xf0 [ 38.351420] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.352046] vma_interval_tree_remove+0xc75/0xec0 [ 38.352641] vma_prepare+0xc54/0x11a0 [ 38.353111] __split_vma+0x5af/0x950 [ 38.353584] ? __pfx___split_vma+0x10/0x10 [ 38.354110] ? find_held_lock+0x2c/0x110 [ 38.354631] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.355194] ? lock_is_held_type+0x9f/0x120 [ 38.355724] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.356331] ? mtree_range_walk+0x632/0x900 [ 38.356877] ? mas_walk+0x5c7/0x7c0 [ 38.357353] do_vmi_munmap+0x1f1/0x2b0 [ 38.357847] mmap_region+0x1f9/0x2660 [ 38.358326] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.358852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.359563] ? __pfx_lock_acquire+0x10/0x10 [ 38.360095] ? __pfx_mmap_region+0x10/0x10 [ 38.360624] ? security_mmap_addr+0x7d/0xa0 [ 38.361145] ? get_unmapped_area+0x1f5/0x3f0 [ 38.361694] do_mmap+0x854/0xf00 [ 38.362126] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.362623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.363188] ksys_mmap_pgoff+0x3af/0x500 [ 38.363694] do_syscall_64+0x3f/0x90 [ 38.364162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.364806] RIP: 0033:0x7ff108596d82 [ 38.365268] 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 [ 38.367389] RSP: 002b:00007ffd060df138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.368282] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff108596d82 [ 38.369125] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1079d0000 [ 38.369967] RBP: 00007ff1079d0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.370813] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a337f3ec0 [ 38.371644] R13: 00007ffd060df150 R14: 00007ffd060df180 R15: 00007ffd060df4e0 [ 38.372501] [ 38.372795] [ 38.373007] Allocated by task 214: [ 38.373431] kasan_save_stack+0x22/0x50 [ 38.373933] kasan_set_track+0x25/0x30 [ 38.374421] __kasan_slab_alloc+0x59/0x70 [ 38.374957] kmem_cache_alloc+0x16b/0x370 [ 38.375467] vm_area_dup+0x20/0x160 [ 38.375916] __split_vma+0x170/0x950 [ 38.376386] split_vma+0xc6/0x110 [ 38.376826] mprotect_fixup+0x8d2/0xb30 [ 38.377324] do_mprotect_pkey+0x87e/0xd40 [ 38.377843] __x64_sys_mprotect+0x78/0xc0 [ 38.378402] do_syscall_64+0x3f/0x90 [ 38.378887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.379521] [ 38.379736] Freed by task 13: [ 38.380115] kasan_save_stack+0x22/0x50 [ 38.380610] kasan_set_track+0x25/0x30 [ 38.381096] kasan_save_free_info+0x2b/0x50 [ 38.381618] __kasan_slab_free+0x10a/0x190 [ 38.382144] kmem_cache_free+0x10d/0x4d0 [ 38.382652] rcu_core+0x8c8/0x2860 [ 38.383100] __do_softirq+0x1b7/0x7d4 [ 38.383574] [ 38.383786] Last potentially related work creation: [ 38.384367] kasan_save_stack+0x22/0x50 [ 38.384974] __kasan_record_aux_stack+0x8e/0xa0 [ 38.385618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.386265] remove_vma+0x139/0x170 [ 38.386734] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.387290] do_vmi_munmap+0x1f1/0x2b0 [ 38.387782] __vm_munmap+0x138/0x3a0 [ 38.388244] __x64_sys_munmap+0x59/0x80 [ 38.388742] do_syscall_64+0x3f/0x90 [ 38.389221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.389859] [ 38.390102] The buggy address belongs to the object at ffff888009f02488 [ 38.390102] which belongs to the cache vm_area_struct of size 168 [ 38.391672] The buggy address is located 88 bytes inside of [ 38.391672] freed 168-byte region [ffff888009f02488, ffff888009f02530) [ 38.393131] [ 38.393376] The buggy address belongs to the physical page: [ 38.394114] page:00000000ce8dd32e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9f02 [ 38.395260] memcg:ffff88800c641901 [ 38.395687] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.396335] page_type: 0xffffffff() [ 38.396818] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.397739] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c641901 [ 38.398682] page dumped because: kasan: bad access detected [ 38.399359] [ 38.399578] Memory state around the buggy address: [ 38.400151] ffff888009f02380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.401013] ffff888009f02400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.401870] >ffff888009f02480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.402734] ^ [ 38.403493] ffff888009f02500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.404345] ffff888009f02580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.405188] ================================================================== [ 38.406122] Disabling lock debugging due to kernel taint [ 40.811214] BUG: Bad rss-counter state mm:00000000b49941c6 type:MM_FILEPAGES val:33 [ 40.812415] BUG: Bad rss-counter state mm:00000000b49941c6 type:MM_ANONPAGES val:22 [ 41.239230] BUG: Bad rss-counter state mm:00000000f3d08b55 type:MM_FILEPAGES val:33 [ 41.239962] BUG: Bad rss-counter state mm:00000000f3d08b55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34565' (ECDSA) to the list of known hosts. 2023/06/19 18:55:56 fuzzer started 2023/06/19 18:55:56 dialing manager at localhost:44161 2023/06/19 18:55:56 checking machine... 2023/06/19 18:55:56 checking revisions... [ 42.003806] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:55:56 testing simple program... [ 42.054872] cgroup: Unknown subsys name 'net' [ 42.103439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:49 Registers: info registers vcpu 0 RAX=ffffffff8121b577 RBX=0000000000000001 RCX=ffffffff864b2c2e RDX=dffffc0000000000 RSI=ffff888008d7fec8 RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b2c32 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b56ba R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888008d7fed0 R15=ffff88806ce09a98 RIP=ffffffff8113106f 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 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=00007fb5a0564000 CR3=000000000ece8000 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=069755e060b102b8a942e1371927cb34 XMM02=2c67c8bc2e329bc30000000000120700 XMM03=fb795ef6d65770560000000000124dc8 XMM04=538b285e0f63a83d00000000000ae988 XMM05=a1bc73d4a0b6ef3200000000001357b8 XMM06=c291bd5c70af25b90000000000134858 XMM07=e042d86d42eb936e0000000000125048 XMM08=bb71e76fab9561900000000000120760 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000008 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84531d61 RBP=ffffffff8540a0c0 RSP=ffff88806cf09f80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=0000000000000280 R15=0000000000000000 RIP=ffffffff84531e1c RFL=00000202 [-------] 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 00007f5852879900 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=00007fffbdc86000 CR3=000000000ce8e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000