syzkaller login: [ 119.962642] BUG: Bad rss-counter state mm:00000000ca7fcdef type:MM_FILEPAGES val:33 [ 119.963281] BUG: Bad rss-counter state mm:00000000ca7fcdef type:MM_ANONPAGES val:22 [ 120.012834] ================================================================== [ 120.013405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 120.014017] Read of size 8 at addr ffff88800d564c20 by task sshd/219 [ 120.014516] [ 120.014678] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 120.015339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 120.015972] Call Trace: [ 120.016170] [ 120.016347] dump_stack_lvl+0x91/0xf0 [ 120.016682] print_report+0xcc/0x620 [ 120.017007] ? __virt_addr_valid+0x102/0x340 [ 120.017353] ? vma_interval_tree_remove+0xc75/0xec0 [ 120.017760] ? vma_interval_tree_remove+0xc75/0xec0 [ 120.018142] kasan_report+0xbe/0xf0 [ 120.029067] ? vma_interval_tree_remove+0xc75/0xec0 [ 120.029461] vma_interval_tree_remove+0xc75/0xec0 [ 120.029880] vma_prepare+0xc54/0x11a0 [ 120.030181] __split_vma+0x5af/0x950 [ 120.030497] ? __pfx___split_vma+0x10/0x10 [ 120.030862] ? find_held_lock+0x2c/0x110 [ 120.031188] do_vmi_align_munmap+0x2ba/0x11f0 [ 120.031540] ? lock_is_held_type+0x9f/0x120 [ 120.031887] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 120.032267] ? mtree_range_walk+0x632/0x900 [ 120.032620] ? mas_walk+0x5c7/0x7c0 [ 120.032917] do_vmi_munmap+0x1f1/0x2b0 [ 120.033223] mmap_region+0x1f9/0x2660 [ 120.033526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 120.033896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 120.034340] ? __pfx_lock_acquire+0x10/0x10 [ 120.034732] ? __pfx_mmap_region+0x10/0x10 [ 120.035061] ? security_mmap_addr+0x7d/0xa0 [ 120.035391] ? get_unmapped_area+0x1f5/0x3f0 [ 120.035733] do_mmap+0x854/0xf00 [ 120.036007] vm_mmap_pgoff+0x1a6/0x3a0 [ 120.036315] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 120.036686] ksys_mmap_pgoff+0x3af/0x500 [ 120.037032] do_syscall_64+0x3f/0x90 [ 120.037332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 120.037740] RIP: 0033:0x7f907741cd82 [ 120.038025] 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 [ 120.043168] RSP: 002b:00007ffc3972e898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 120.043816] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f907741cd82 [ 120.044386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9076856000 [ 120.044909] RBP: 00007f9076856000 R08: 0000000000000009 R09: 0000000000001000 [ 120.045478] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a777d6ef70 [ 120.046048] R13: 00007ffc3972e8b0 R14: 00007ffc3972e8e0 R15: 00007ffc3972ec40 [ 120.046698] [ 120.046883] [ 120.047016] Allocated by task 212: [ 120.047356] kasan_save_stack+0x22/0x50 [ 120.047703] kasan_set_track+0x25/0x30 [ 120.048041] __kasan_slab_alloc+0x59/0x70 [ 120.048417] kmem_cache_alloc+0x16b/0x370 [ 120.048772] vm_area_dup+0x20/0x160 [ 120.049056] __split_vma+0x170/0x950 [ 120.049395] split_vma+0xc6/0x110 [ 120.049684] mprotect_fixup+0x8d2/0xb30 [ 120.050031] do_mprotect_pkey+0x87e/0xd40 [ 120.050404] __x64_sys_mprotect+0x78/0xc0 [ 120.050785] do_syscall_64+0x3f/0x90 [ 120.051079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 120.051521] [ 120.051658] Freed by task 212: [ 120.051939] kasan_save_stack+0x22/0x50 [ 120.052254] kasan_set_track+0x25/0x30 [ 120.052665] kasan_save_free_info+0x2b/0x50 [ 120.053003] __kasan_slab_free+0x10a/0x190 [ 120.053384] kmem_cache_free+0x10d/0x4d0 [ 120.053722] rcu_core+0x8c8/0x2860 [ 120.054028] __do_softirq+0x1b7/0x7d4 [ 120.054374] [ 120.054533] Last potentially related work creation: [ 120.054920] kasan_save_stack+0x22/0x50 [ 120.055232] __kasan_record_aux_stack+0x8e/0xa0 [ 120.055635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 120.056086] remove_vma+0x139/0x170 [ 120.056420] do_vmi_align_munmap+0xd4a/0x11f0 [ 120.056793] do_vmi_munmap+0x1f1/0x2b0 [ 120.057094] __vm_munmap+0x138/0x3a0 [ 120.057925] __x64_sys_munmap+0x59/0x80 [ 120.058238] do_syscall_64+0x3f/0x90 [ 120.058608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 120.059056] [ 120.059190] Second to last potentially related work creation: [ 120.059689] kasan_save_stack+0x22/0x50 [ 120.060008] __kasan_record_aux_stack+0x8e/0xa0 [ 120.060410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 120.060817] remove_vma+0x139/0x170 [ 120.061100] do_vmi_align_munmap+0xd4a/0x11f0 [ 120.061494] do_vmi_munmap+0x1f1/0x2b0 [ 120.061823] mmap_region+0x1f9/0x2660 [ 120.062118] do_mmap+0x854/0xf00 [ 120.062477] vm_mmap_pgoff+0x1a6/0x3a0 [ 120.062892] ksys_mmap_pgoff+0x3af/0x500 [ 120.063251] do_syscall_64+0x3f/0x90 [ 120.063656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 120.064121] [ 120.064272] The buggy address belongs to the object at ffff88800d564bc8 [ 120.064272] which belongs to the cache vm_area_struct of size 168 [ 120.065438] The buggy address is located 88 bytes inside of [ 120.065438] freed 168-byte region [ffff88800d564bc8, ffff88800d564c70) [ 120.066533] [ 120.066673] The buggy address belongs to the physical page: [ 120.067080] page:00000000416a08dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd564 [ 120.067898] memcg:ffff88800c6e9801 [ 120.068200] flags: 0x100000000000200(slab|node=0|zone=1) [ 120.068717] page_type: 0xffffffff() [ 120.069036] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 120.069740] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6e9801 [ 120.070456] page dumped because: kasan: bad access detected [ 120.070941] [ 120.071094] Memory state around the buggy address: [ 120.071549] ffff88800d564b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 120.072173] ffff88800d564b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 120.072868] >ffff88800d564c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 120.073542] ^ [ 120.073924] ffff88800d564c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 120.074613] ffff88800d564d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 120.075223] ================================================================== [ 120.090611] Disabling lock debugging due to kernel taint [ 122.846646] BUG: Bad rss-counter state mm:0000000022284fd3 type:MM_FILEPAGES val:33 [ 122.847460] BUG: Bad rss-counter state mm:0000000022284fd3 type:MM_ANONPAGES val:22 [ 123.661523] BUG: Bad rss-counter state mm:000000006fb13768 type:MM_FILEPAGES val:33 [ 123.662161] BUG: Bad rss-counter state mm:000000006fb13768 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2084' (ECDSA) to the list of known hosts. 2023/06/20 10:21:00 fuzzer started 2023/06/20 10:21:00 dialing manager at localhost:44161 2023/06/20 10:21:00 checking machine... 2023/06/20 10:21:00 checking revisions... [ 124.565898] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:21:01 testing simple program... [ 124.605974] cgroup: Unknown subsys name 'net' [ 124.689548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:19:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c664000 RCX=0000000000000000 RDX=0000000000000006 RSI=ffff88807ffdc000 RDI=ffffffff81839c37 RBP=ffff88800c9edb00 RSP=ffff888010287b70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000ffffff20 R15=ffff88800c9edb00 RIP=ffffffff8153434d 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 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=00007fae9f339328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dead000000000122 RBX=ffff888013d71768 RCX=ffffffff812e00e5 RDX=1ffff110027ae2ed RSI=ffffffff87b86f80 RDI=ffffffff856d8348 RBP=ffff88800cbc0000 RSP=ffff88800fd3fbb8 R8 =0000000000000001 R9 =ffffed1001fa7f65 R10=0000000000000003 R11=0000000000000014 R12=0000000000000087 R13=ffffffff856d8340 R14=ffffffff811a9709 R15=0000000000000000 RIP=ffffffff84513688 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 00007ff5173ad900 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=00007f0015beadb0 CR3=000000000d02c000 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=2030303a31323a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a30323a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000