syzkaller login: [ 54.079830] sshd (213) used greatest stack depth: 24128 bytes left [ 54.082124] BUG: Bad rss-counter state mm:00000000b1ebc519 type:MM_FILEPAGES val:33 [ 54.083285] BUG: Bad rss-counter state mm:00000000b1ebc519 type:MM_ANONPAGES val:22 [ 54.249804] ================================================================== [ 54.250686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.251572] Read of size 8 at addr ffff88800d7b2ed8 by task sshd/220 [ 54.252399] [ 54.252630] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.253439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.254355] Call Trace: [ 54.254715] [ 54.254985] dump_stack_lvl+0x91/0xf0 [ 54.255452] print_report+0xcc/0x620 [ 54.255905] ? __virt_addr_valid+0x102/0x340 [ 54.256434] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.257027] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.257615] kasan_report+0xbe/0xf0 [ 54.258068] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.258664] vma_interval_tree_remove+0xc75/0xec0 [ 54.259239] vma_prepare+0xc54/0x11a0 [ 54.259694] __split_vma+0x5af/0x950 [ 54.260158] ? __pfx___split_vma+0x10/0x10 [ 54.260674] ? find_held_lock+0x2c/0x110 [ 54.261191] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.261746] ? lock_is_held_type+0x9f/0x120 [ 54.262278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.262873] ? mtree_range_walk+0x632/0x900 [ 54.263420] ? mas_walk+0x5c7/0x7c0 [ 54.263888] do_vmi_munmap+0x1f1/0x2b0 [ 54.264380] mmap_region+0x1f9/0x2660 [ 54.264862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.265372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.266076] ? __pfx_lock_acquire+0x10/0x10 [ 54.266628] ? __pfx_mmap_region+0x10/0x10 [ 54.267160] ? security_mmap_addr+0x7d/0xa0 [ 54.267688] ? get_unmapped_area+0x1f5/0x3f0 [ 54.268233] do_mmap+0x854/0xf00 [ 54.268669] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.269159] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.269714] ksys_mmap_pgoff+0x3af/0x500 [ 54.270221] do_syscall_64+0x3f/0x90 [ 54.270704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.271345] RIP: 0033:0x7f13fce08d82 [ 54.271801] 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 [ 54.273905] RSP: 002b:00007fff1f413be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.274809] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13fce08d82 [ 54.275636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13fc242000 [ 54.276461] RBP: 00007f13fc242000 R08: 0000000000000009 R09: 0000000000001000 [ 54.277296] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d30955ec0 [ 54.278133] R13: 00007fff1f413c00 R14: 00007fff1f413c30 R15: 00007fff1f413f90 [ 54.278983] [ 54.279274] [ 54.279485] Allocated by task 213: [ 54.279910] kasan_save_stack+0x22/0x50 [ 54.280407] kasan_set_track+0x25/0x30 [ 54.280897] __kasan_slab_alloc+0x59/0x70 [ 54.281420] kmem_cache_alloc+0x16b/0x370 [ 54.281928] vm_area_dup+0x20/0x160 [ 54.282387] __split_vma+0x170/0x950 [ 54.282861] split_vma+0xc6/0x110 [ 54.283302] mprotect_fixup+0x8d2/0xb30 [ 54.283795] do_mprotect_pkey+0x87e/0xd40 [ 54.284314] __x64_sys_mprotect+0x78/0xc0 [ 54.284824] do_syscall_64+0x3f/0x90 [ 54.285293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.285923] [ 54.286138] Freed by task 213: [ 54.286524] kasan_save_stack+0x22/0x50 [ 54.287028] kasan_set_track+0x25/0x30 [ 54.287515] kasan_save_free_info+0x2b/0x50 [ 54.288042] __kasan_slab_free+0x10a/0x190 [ 54.288563] kmem_cache_free+0x10d/0x4d0 [ 54.289074] rcu_core+0x8c8/0x2860 [ 54.289502] __do_softirq+0x1b7/0x7d4 [ 54.289977] [ 54.290191] Last potentially related work creation: [ 54.290774] kasan_save_stack+0x22/0x50 [ 54.291275] __kasan_record_aux_stack+0x8e/0xa0 [ 54.291845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.292480] remove_vma+0x139/0x170 [ 54.292935] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.293561] do_vmi_munmap+0x1f1/0x2b0 [ 54.294054] __vm_munmap+0x138/0x3a0 [ 54.294518] __x64_sys_munmap+0x59/0x80 [ 54.295037] do_syscall_64+0x3f/0x90 [ 54.295512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.296150] [ 54.296370] The buggy address belongs to the object at ffff88800d7b2e80 [ 54.296370] which belongs to the cache vm_area_struct of size 168 [ 54.297825] The buggy address is located 88 bytes inside of [ 54.297825] freed 168-byte region [ffff88800d7b2e80, ffff88800d7b2f28) [ 54.299227] [ 54.299440] The buggy address belongs to the physical page: [ 54.300086] page:00000000a6720991 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7b2 [ 54.301154] memcg:ffff888019f65c01 [ 54.301572] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.302212] page_type: 0xffffffff() [ 54.302666] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.303576] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f65c01 [ 54.304473] page dumped because: kasan: bad access detected [ 54.305123] [ 54.305340] Memory state around the buggy address: [ 54.305907] ffff88800d7b2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.306762] ffff88800d7b2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 54.307604] >ffff88800d7b2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.308436] ^ [ 54.309145] ffff88800d7b2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 54.309980] ffff88800d7b2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 54.310841] ================================================================== [ 54.311749] Disabling lock debugging due to kernel taint [ 56.637056] BUG: Bad rss-counter state mm:00000000335949f2 type:MM_FILEPAGES val:33 [ 56.638049] BUG: Bad rss-counter state mm:00000000335949f2 type:MM_ANONPAGES val:22 [ 57.141230] BUG: Bad rss-counter state mm:00000000383dd4c9 type:MM_FILEPAGES val:33 [ 57.142170] BUG: Bad rss-counter state mm:00000000383dd4c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21153' (ECDSA) to the list of known hosts. 2023/06/20 06:46:37 fuzzer started 2023/06/20 06:46:37 dialing manager at localhost:44161 2023/06/20 06:46:37 checking machine... 2023/06/20 06:46:37 checking revisions... [ 57.853326] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:46:37 testing simple program... [ 57.903496] cgroup: Unknown subsys name 'net' [ 57.952961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:36 Registers: info registers vcpu 0 RAX=ffffffff818ad738 RBX=ffffffff85e077c4 RCX=ffffffff818ad8c9 RDX=0000000000000000 RSI=ffffffff861479b4 RDI=ffffffff85e077c4 RBP=ffffffff85e077c8 RSP=ffff8880146af590 R8 =ffffffff861479b4 R9 =ffff8880146af688 R10=0000000000038001 R11=00000000000238fc R12=ffffffff85e077c4 R13=ffffffff85e077c4 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f5407809900 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=00007f9cb619d650 CR3=000000000cde8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e81a2561b9855d5b00000000000ae988 XMM05=823b9c374ed5c2360000000000135990 XMM06=c291bd5c70af25b90000000000134780 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f9cb5b04000 CR3=000000001a51e000 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=341233a3dcd74c62e5a6888c5e325161 XMM02=ad005d5200c18d86ec54e300f6a76ef3 XMM03=d9b5bf59cfa8f5ab3f8a86140b21d8bc XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000