syzkaller login: [ 38.699428] BUG: Bad rss-counter state mm:000000008d5dba9d type:MM_FILEPAGES val:33 [ 38.701272] BUG: Bad rss-counter state mm:000000008d5dba9d type:MM_ANONPAGES val:22 [ 38.868334] ================================================================== [ 38.869182] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.870057] Read of size 8 at addr ffff88800dee0880 by task sshd/219 [ 38.870885] [ 38.871094] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.871927] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.872855] Call Trace: [ 38.873156] [ 38.873428] dump_stack_lvl+0x91/0xf0 [ 38.873888] print_report+0xcc/0x620 [ 38.874346] ? __virt_addr_valid+0x102/0x340 [ 38.874872] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875450] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876053] kasan_report+0xbe/0xf0 [ 38.876503] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877083] vma_interval_tree_remove+0xc75/0xec0 [ 38.877659] vma_prepare+0xc54/0x11a0 [ 38.878113] __split_vma+0x5af/0x950 [ 38.878572] ? __pfx___split_vma+0x10/0x10 [ 38.879099] ? find_held_lock+0x2c/0x110 [ 38.879618] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.880197] ? lock_is_held_type+0x9f/0x120 [ 38.880739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.881356] ? mtree_range_walk+0x632/0x900 [ 38.881898] ? mas_walk+0x5c7/0x7c0 [ 38.882374] do_vmi_munmap+0x1f1/0x2b0 [ 38.882861] mmap_region+0x1f9/0x2660 [ 38.883353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.883871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.884591] ? __pfx_lock_acquire+0x10/0x10 [ 38.885117] ? __pfx_mmap_region+0x10/0x10 [ 38.885644] ? security_mmap_addr+0x7d/0xa0 [ 38.886174] ? get_unmapped_area+0x1f5/0x3f0 [ 38.886728] do_mmap+0x854/0xf00 [ 38.887168] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.887656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.888237] ksys_mmap_pgoff+0x3af/0x500 [ 38.888742] do_syscall_64+0x3f/0x90 [ 38.889217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889866] RIP: 0033:0x7fb1ee315d82 [ 38.890324] 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 [ 38.892481] RSP: 002b:00007ffefac139b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.893384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1ee315d82 [ 38.894273] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1ed74f000 [ 38.895319] RBP: 00007fb1ed74f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.896264] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9a0b52ec0 [ 38.897119] R13: 00007ffefac139d0 R14: 00007ffefac13a00 R15: 00007ffefac13d60 [ 38.897991] [ 38.898286] [ 38.898504] Allocated by task 212: [ 38.898933] kasan_save_stack+0x22/0x50 [ 38.899442] kasan_set_track+0x25/0x30 [ 38.899950] __kasan_slab_alloc+0x59/0x70 [ 38.900477] kmem_cache_alloc+0x16b/0x370 [ 38.900998] vm_area_dup+0x20/0x160 [ 38.901451] __split_vma+0x170/0x950 [ 38.901918] split_vma+0xc6/0x110 [ 38.902359] mprotect_fixup+0x8d2/0xb30 [ 38.902863] do_mprotect_pkey+0x87e/0xd40 [ 38.903388] __x64_sys_mprotect+0x78/0xc0 [ 38.903932] do_syscall_64+0x3f/0x90 [ 38.904404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.905049] [ 38.905262] Freed by task 19: [ 38.905646] kasan_save_stack+0x22/0x50 [ 38.906151] kasan_set_track+0x25/0x30 [ 38.906640] kasan_save_free_info+0x2b/0x50 [ 38.907166] __kasan_slab_free+0x10a/0x190 [ 38.907693] kmem_cache_free+0x10d/0x4d0 [ 38.908223] rcu_core+0x8c8/0x2860 [ 38.908673] __do_softirq+0x1b7/0x7d4 [ 38.909147] [ 38.909361] Last potentially related work creation: [ 38.910008] kasan_save_stack+0x22/0x50 [ 38.910577] __kasan_record_aux_stack+0x8e/0xa0 [ 38.911168] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.911849] remove_vma+0x139/0x170 [ 38.912311] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.912875] do_vmi_munmap+0x1f1/0x2b0 [ 38.913367] __vm_munmap+0x138/0x3a0 [ 38.913847] __x64_sys_munmap+0x59/0x80 [ 38.914352] do_syscall_64+0x3f/0x90 [ 38.914850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915514] [ 38.915731] The buggy address belongs to the object at ffff88800dee0828 [ 38.915731] which belongs to the cache vm_area_struct of size 168 [ 38.917261] The buggy address is located 88 bytes inside of [ 38.917261] freed 168-byte region [ffff88800dee0828, ffff88800dee08d0) [ 38.918711] [ 38.918935] The buggy address belongs to the physical page: [ 38.919628] page:00000000f92a290d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdee0 [ 38.920787] memcg:ffff88800e598001 [ 38.921235] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.921901] page_type: 0xffffffff() [ 38.922368] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386300 dead000000000008 [ 38.923317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e598001 [ 38.924261] page dumped because: kasan: bad access detected [ 38.924946] [ 38.925169] Memory state around the buggy address: [ 38.925760] ffff88800dee0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.926641] ffff88800dee0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.927527] >ffff88800dee0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.928430] ^ [ 38.928848] ffff88800dee0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.929727] ffff88800dee0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.930600] ================================================================== [ 38.931752] Disabling lock debugging due to kernel taint [ 40.938537] BUG: Bad rss-counter state mm:00000000afe252cf type:MM_FILEPAGES val:33 [ 40.939594] BUG: Bad rss-counter state mm:00000000afe252cf type:MM_ANONPAGES val:22 [ 41.401194] BUG: Bad rss-counter state mm:00000000409e4c92 type:MM_FILEPAGES val:33 [ 41.402773] BUG: Bad rss-counter state mm:00000000409e4c92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60619' (ECDSA) to the list of known hosts. 2023/06/20 20:22:58 fuzzer started 2023/06/20 20:22:59 dialing manager at localhost:36067 2023/06/20 20:22:59 checking machine... 2023/06/20 20:22:59 checking revisions... [ 42.148616] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:22:59 testing simple program... [ 42.200552] cgroup: Unknown subsys name 'net' [ 42.247058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:22:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff88800f069b40 RSI=ffffffff81718764 RDI=ffff88800b9675a0 RBP=ffff88800c48fcb0 RSP=ffff88800ee9fe70 R8 =0000000000000000 R9 =ffffed100172ceb4 R10=ffff88800b9675a3 R11=0000000000000000 R12=0000000000000000 R13=00007f9c701e80b0 R14=ffff88800c48fcc0 R15=0000000000000040 RIP=ffffffff814c0864 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9c6fc30900 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=00007f9c701e80b0 CR3=000000000e9aa000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe52fd849c0 CR3=000000000c724000 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=64a459be2d6d5d9f204a2365ebefd5d9 XMM02=ec2efd57dc4c00df000000000011ca00 XMM03=a052ab57c2d4573b000000000011cad0 XMM04=d40c8cca958b86b400000000000ae988 XMM05=dfcdbad4f1609c370000000000132870 XMM06=806171799158d96700000000001326f8 XMM07=e042d86d42eb936e0000000000122f50 XMM08=a052ab57c2d4573b000000000011cad0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000