syzkaller login: [ 39.992388] BUG: Bad rss-counter state mm:0000000066df8baf type:MM_FILEPAGES val:33 [ 39.993490] BUG: Bad rss-counter state mm:0000000066df8baf type:MM_ANONPAGES val:22 [ 40.044028] ================================================================== [ 40.044952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.045918] Read of size 8 at addr ffff888019798df0 by task sshd/219 [ 40.046695] [ 40.046914] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.047782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.048808] Call Trace: [ 40.049125] <TASK> [ 40.049423] dump_stack_lvl+0x91/0xf0 [ 40.049926] print_report+0xcc/0x620 [ 40.050420] ? __virt_addr_valid+0x102/0x340 [ 40.050984] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.051607] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.052230] kasan_report+0xbe/0xf0 [ 40.052724] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.053369] vma_interval_tree_remove+0xc75/0xec0 [ 40.053978] vma_prepare+0xc54/0x11a0 [ 40.054470] __split_vma+0x5af/0x950 [ 40.054945] ? __pfx___split_vma+0x10/0x10 [ 40.055494] ? find_held_lock+0x2c/0x110 [ 40.056034] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.056622] ? lock_is_held_type+0x9f/0x120 [ 40.057163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.057788] ? mtree_range_walk+0x632/0x900 [ 40.058344] ? mas_walk+0x5c7/0x7c0 [ 40.058821] do_vmi_munmap+0x1f1/0x2b0 [ 40.059315] mmap_region+0x1f9/0x2660 [ 40.059797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.060310] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.061041] ? __pfx_lock_acquire+0x10/0x10 [ 40.061579] ? __pfx_mmap_region+0x10/0x10 [ 40.062126] ? security_mmap_addr+0x7d/0xa0 [ 40.062645] ? get_unmapped_area+0x1f5/0x3f0 [ 40.063169] do_mmap+0x854/0xf00 [ 40.063597] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.064073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.064623] ksys_mmap_pgoff+0x3af/0x500 [ 40.065104] do_syscall_64+0x3f/0x90 [ 40.065566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.066207] RIP: 0033:0x7f4e0c7c0d82 [ 40.066655] 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 [ 40.068799] RSP: 002b:00007ffde8615448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.069714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e0c7c0d82 [ 40.070565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e0bbfa000 [ 40.071421] RBP: 00007f4e0bbfa000 R08: 0000000000000009 R09: 0000000000001000 [ 40.072272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df530dfec0 [ 40.073162] R13: 00007ffde8615460 R14: 00007ffde8615490 R15: 00007ffde86157f0 [ 40.074029] </TASK> [ 40.074325] [ 40.074543] Allocated by task 212: [ 40.074982] kasan_save_stack+0x22/0x50 [ 40.075496] kasan_set_track+0x25/0x30 [ 40.075991] __kasan_slab_alloc+0x59/0x70 [ 40.076533] kmem_cache_alloc+0x16b/0x370 [ 40.077064] vm_area_dup+0x20/0x160 [ 40.077523] __split_vma+0x170/0x950 [ 40.077997] split_vma+0xc6/0x110 [ 40.078449] mprotect_fixup+0x8d2/0xb30 [ 40.078956] do_mprotect_pkey+0x87e/0xd40 [ 40.079481] __x64_sys_mprotect+0x78/0xc0 [ 40.080003] do_syscall_64+0x3f/0x90 [ 40.080519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.081160] [ 40.081377] Freed by task 212: [ 40.081778] kasan_save_stack+0x22/0x50 [ 40.082287] kasan_set_track+0x25/0x30 [ 40.082784] kasan_save_free_info+0x2b/0x50 [ 40.083327] __kasan_slab_free+0x10a/0x190 [ 40.083859] kmem_cache_free+0x10d/0x4d0 [ 40.084359] rcu_core+0x8c8/0x2860 [ 40.084815] __do_softirq+0x1b7/0x7d4 [ 40.085286] [ 40.085495] Last potentially related work creation: [ 40.086096] kasan_save_stack+0x22/0x50 [ 40.086620] __kasan_record_aux_stack+0x8e/0xa0 [ 40.087217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.087901] remove_vma+0x139/0x170 [ 40.088502] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.089191] do_vmi_munmap+0x1f1/0x2b0 [ 40.089740] __vm_munmap+0x138/0x3a0 [ 40.090245] __x64_sys_munmap+0x59/0x80 [ 40.090801] do_syscall_64+0x3f/0x90 [ 40.091283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.091935] [ 40.092153] The buggy address belongs to the object at ffff888019798d98 [ 40.092153] which belongs to the cache vm_area_struct of size 168 [ 40.093939] The buggy address is located 88 bytes inside of [ 40.093939] freed 168-byte region [ffff888019798d98, ffff888019798e40) [ 40.095715] [ 40.095981] The buggy address belongs to the physical page: [ 40.096705] page:000000005d6cf292 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19798 [ 40.097839] memcg:ffff88800c436001 [ 40.098285] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.099007] page_type: 0xffffffff() [ 40.099482] raw: 0100000000000200 ffff88800879fc80 ffffea000065f780 dead000000000003 [ 40.100420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c436001 [ 40.101344] page dumped because: kasan: bad access detected [ 40.102027] [ 40.102251] Memory state around the buggy address: [ 40.102862] ffff888019798c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 40.103718] ffff888019798d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 40.104590] >ffff888019798d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.105458] ^ [ 40.106270] ffff888019798e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.107177] ffff888019798e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.108077] ================================================================== [ 40.109530] Disabling lock debugging due to kernel taint [ 42.130586] BUG: Bad rss-counter state mm:00000000ad113aad type:MM_FILEPAGES val:33 [ 42.131619] BUG: Bad rss-counter state mm:00000000ad113aad type:MM_ANONPAGES val:22 [ 42.595772] BUG: Bad rss-counter state mm:000000004d60c31e type:MM_FILEPAGES val:33 [ 42.597199] BUG: Bad rss-counter state mm:000000004d60c31e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29571' (ECDSA) to the list of known hosts. 2023/06/19 22:55:40 fuzzer started 2023/06/19 22:55:40 dialing manager at localhost:44161 2023/06/19 22:55:40 checking machine... 2023/06/19 22:55:40 checking revisions... [ 43.344743] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:55:40 testing simple program... [ 43.397619] cgroup: Unknown subsys name 'net' [ 43.450979] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:55:39 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000000000000200 RCX=0000000000000000 RDX=1ffffffff0a828c3 RSI=0000000000000020 RDI=ffffffff85d3bed0 RBP=0000000000000020 RSP=ffff8880068b7d90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff854145c0 R13=ffffffffffffffff R14=000000000003fd30 R15=ffff88800d9ec400 RIP=ffffffff82244372 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 00007faf36766900 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=00007ffc18ff6000 CR3=0000000013f26000 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=00007f32e5fb70b0 CR3=000000000c604000 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=3bc5a976c0901ba2444a976174e28db1 XMM02=ec2efd57dc4c00df000000000011d650 XMM03=82158f5b80ce23cf000000000011d720 XMM04=f5e12457a1e98bf700000000000ae988 XMM05=93ce895e8a9a24230000000000134a68 XMM06=806171799158d9670000000000133798 XMM07=e042d86d42eb936e0000000000124338 XMM08=82158f5b80ce23cf000000000011d720 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000