syzkaller login: [ 38.864513] BUG: Bad rss-counter state mm:000000001820b1ca type:MM_FILEPAGES val:33 [ 38.865256] BUG: Bad rss-counter state mm:000000001820b1ca type:MM_ANONPAGES val:22 [ 39.002945] ================================================================== [ 39.003676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.004379] Read of size 8 at addr ffff88800c6ab968 by task sshd/221 [ 39.004925] [ 39.005082] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.005740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.006767] Call Trace: [ 39.007011] [ 39.007285] dump_stack_lvl+0x91/0xf0 [ 39.007638] print_report+0xcc/0x620 [ 39.007974] ? __virt_addr_valid+0x102/0x340 [ 39.008391] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.008832] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.009270] kasan_report+0xbe/0xf0 [ 39.009619] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.010049] vma_interval_tree_remove+0xc75/0xec0 [ 39.010483] vma_prepare+0xc54/0x11a0 [ 39.010817] __split_vma+0x5af/0x950 [ 39.011142] ? __pfx___split_vma+0x10/0x10 [ 39.011510] ? find_held_lock+0x2c/0x110 [ 39.011874] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.012295] ? lock_is_held_type+0x9f/0x120 [ 39.012668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.013101] ? mtree_range_walk+0x632/0x900 [ 39.013492] ? mas_walk+0x5c7/0x7c0 [ 39.013818] do_vmi_munmap+0x1f1/0x2b0 [ 39.014156] mmap_region+0x1f9/0x2660 [ 39.014488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.014855] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.015348] ? __pfx_lock_acquire+0x10/0x10 [ 39.015713] ? __pfx_mmap_region+0x10/0x10 [ 39.016123] ? security_mmap_addr+0x7d/0xa0 [ 39.016481] ? get_unmapped_area+0x1f5/0x3f0 [ 39.016862] do_mmap+0x854/0xf00 [ 39.017164] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.017505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.017901] ksys_mmap_pgoff+0x3af/0x500 [ 39.018246] do_syscall_64+0x3f/0x90 [ 39.018576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.019003] RIP: 0033:0x7f82e7635d82 [ 39.019288] 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 [ 39.020758] RSP: 002b:00007fff60de8588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.021418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82e7635d82 [ 39.021989] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82e6a6f000 [ 39.022556] RBP: 00007f82e6a6f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.023125] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616422a9d90 [ 39.023679] R13: 00007fff60de85a0 R14: 00007fff60de85d0 R15: 00007fff60de8930 [ 39.024304] [ 39.024498] [ 39.024642] Allocated by task 214: [ 39.024925] kasan_save_stack+0x22/0x50 [ 39.025282] kasan_set_track+0x25/0x30 [ 39.025641] __kasan_slab_alloc+0x59/0x70 [ 39.025966] kmem_cache_alloc+0x16b/0x370 [ 39.026295] vm_area_dup+0x20/0x160 [ 39.026615] __split_vma+0x170/0x950 [ 39.026937] split_vma+0xc6/0x110 [ 39.027244] mprotect_fixup+0x8d2/0xb30 [ 39.027580] do_mprotect_pkey+0x87e/0xd40 [ 39.027919] __x64_sys_mprotect+0x78/0xc0 [ 39.028285] do_syscall_64+0x3f/0x90 [ 39.028605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.029028] [ 39.029170] Freed by task 204: [ 39.029435] kasan_save_stack+0x22/0x50 [ 39.029767] kasan_set_track+0x25/0x30 [ 39.030091] kasan_save_free_info+0x2b/0x50 [ 39.030472] __kasan_slab_free+0x10a/0x190 [ 39.030819] kmem_cache_free+0x10d/0x4d0 [ 39.031176] rcu_core+0x8c8/0x2860 [ 39.031485] __do_softirq+0x1b7/0x7d4 [ 39.031804] [ 39.031943] Last potentially related work creation: [ 39.032410] kasan_save_stack+0x22/0x50 [ 39.032761] __kasan_record_aux_stack+0x8e/0xa0 [ 39.033151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.033603] remove_vma+0x139/0x170 [ 39.033924] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.034319] do_vmi_munmap+0x1f1/0x2b0 [ 39.034658] __vm_munmap+0x138/0x3a0 [ 39.035010] __x64_sys_munmap+0x59/0x80 [ 39.035386] do_syscall_64+0x3f/0x90 [ 39.035728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.036213] [ 39.036363] The buggy address belongs to the object at ffff88800c6ab910 [ 39.036363] which belongs to the cache vm_area_struct of size 168 [ 39.037455] The buggy address is located 88 bytes inside of [ 39.037455] freed 168-byte region [ffff88800c6ab910, ffff88800c6ab9b8) [ 39.038439] [ 39.038584] The buggy address belongs to the physical page: [ 39.039050] page:0000000011e84f45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6ab [ 39.039794] memcg:ffff88800c5fe701 [ 39.040152] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.040609] page_type: 0xffffffff() [ 39.040922] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.041586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5fe701 [ 39.042230] page dumped because: kasan: bad access detected [ 39.042709] [ 39.042863] Memory state around the buggy address: [ 39.043286] ffff88800c6ab800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.043902] ffff88800c6ab880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.044537] >ffff88800c6ab900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.045135] ^ [ 39.045679] ffff88800c6ab980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.046272] ffff88800c6aba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.046873] ================================================================== [ 39.047548] Disabling lock debugging due to kernel taint [ 40.665933] BUG: Bad rss-counter state mm:00000000991ad7b5 type:MM_FILEPAGES val:33 [ 40.666755] BUG: Bad rss-counter state mm:00000000991ad7b5 type:MM_ANONPAGES val:22 [ 41.092935] BUG: Bad rss-counter state mm:0000000048b29fc1 type:MM_FILEPAGES val:33 [ 41.093692] BUG: Bad rss-counter state mm:0000000048b29fc1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18343' (ECDSA) to the list of known hosts. 2023/06/20 09:17:13 fuzzer started 2023/06/20 09:17:14 dialing manager at localhost:44161 2023/06/20 09:17:14 checking machine... 2023/06/20 09:17:14 checking revisions... [ 41.618342] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:17:14 testing simple program... [ 41.654817] cgroup: Unknown subsys name 'net' [ 41.701600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:17:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000001 RSI=ffffffff81859f8c RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000023884 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff811306e2 RFL=00000297 [--S-APC] 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 00007ff7e729a900 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=00007fff977bf000 CR3=000000001cd84000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8d992f78c0 CR3=000000000d83a000 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=ac8020b229abc09b8e4428942b4d730e XMM02=2c67c8bc2e329bc3000000000011d640 XMM03=fb795ef6d657705600000000001248b0 XMM04=8bf60669654170aa00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134688 XMM06=16e27a42537f76e500000000001334f0 XMM07=e042d86d42eb936e0000000000124b30 XMM08=1170a52ccf90e4b3000000000011d6a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000