syzkaller login: [ 31.672463] BUG: Bad rss-counter state mm:0000000041ccdd1c type:MM_FILEPAGES val:33 [ 31.674233] BUG: Bad rss-counter state mm:0000000041ccdd1c type:MM_ANONPAGES val:22 [ 31.855621] ================================================================== [ 31.856598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.857584] Read of size 8 at addr ffff88801a1ed058 by task sshd/219 [ 31.858543] [ 31.858772] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.859709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.860721] Call Trace: [ 31.861054] [ 31.861356] dump_stack_lvl+0x91/0xf0 [ 31.861867] print_report+0xcc/0x620 [ 31.862372] ? __virt_addr_valid+0x102/0x340 [ 31.862954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.863623] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.864270] kasan_report+0xbe/0xf0 [ 31.864771] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.865425] vma_interval_tree_remove+0xc75/0xec0 [ 31.866060] vma_prepare+0xc54/0x11a0 [ 31.866568] __split_vma+0x5af/0x950 [ 31.867085] ? __pfx___split_vma+0x10/0x10 [ 31.867643] ? find_held_lock+0x2c/0x110 [ 31.868189] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.868787] ? lock_is_held_type+0x9f/0x120 [ 31.869358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.869994] ? mtree_range_walk+0x632/0x900 [ 31.870570] ? mas_walk+0x5c7/0x7c0 [ 31.871073] do_vmi_munmap+0x1f1/0x2b0 [ 31.871591] mmap_region+0x1f9/0x2660 [ 31.872100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.872638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.873390] ? __pfx_lock_acquire+0x10/0x10 [ 31.873947] ? __pfx_mmap_region+0x10/0x10 [ 31.874505] ? security_mmap_addr+0x7d/0xa0 [ 31.875072] ? get_unmapped_area+0x1f5/0x3f0 [ 31.875653] do_mmap+0x854/0xf00 [ 31.876116] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.876636] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.877224] ksys_mmap_pgoff+0x3af/0x500 [ 31.877760] do_syscall_64+0x3f/0x90 [ 31.878261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.878937] RIP: 0033:0x7f4422bd0d82 [ 31.879443] 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 [ 31.881679] RSP: 002b:00007ffc2a80a098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.882636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4422bd0d82 [ 31.883578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f442200a000 [ 31.884538] RBP: 00007f442200a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.885500] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629b755aec0 [ 31.886464] R13: 00007ffc2a80a0b0 R14: 00007ffc2a80a0e0 R15: 00007ffc2a80a440 [ 31.887443] [ 31.887772] [ 31.888015] Allocated by task 212: [ 31.888499] kasan_save_stack+0x22/0x50 [ 31.889070] kasan_set_track+0x25/0x30 [ 31.889627] __kasan_slab_alloc+0x59/0x70 [ 31.890218] kmem_cache_alloc+0x16b/0x370 [ 31.890804] vm_area_dup+0x20/0x160 [ 31.891333] __split_vma+0x170/0x950 [ 31.891857] split_vma+0xc6/0x110 [ 31.892352] mprotect_fixup+0x8d2/0xb30 [ 31.892918] do_mprotect_pkey+0x87e/0xd40 [ 31.893504] __x64_sys_mprotect+0x78/0xc0 [ 31.894091] do_syscall_64+0x3f/0x90 [ 31.894626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.895357] [ 31.895597] Freed by task 212: [ 31.896039] kasan_save_stack+0x22/0x50 [ 31.896607] kasan_set_track+0x25/0x30 [ 31.897163] kasan_save_free_info+0x2b/0x50 [ 31.897766] __kasan_slab_free+0x10a/0x190 [ 31.898366] kmem_cache_free+0x10d/0x4d0 [ 31.898941] rcu_core+0x8c8/0x2860 [ 31.899461] __do_softirq+0x1b7/0x7d4 [ 31.900058] [ 31.900300] Last potentially related work creation: [ 31.900960] kasan_save_stack+0x22/0x50 [ 31.901528] __kasan_record_aux_stack+0x8e/0xa0 [ 31.902173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.902897] remove_vma+0x139/0x170 [ 31.903413] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.904042] do_vmi_munmap+0x1f1/0x2b0 [ 31.904590] __vm_munmap+0x138/0x3a0 [ 31.905118] __x64_sys_munmap+0x59/0x80 [ 31.905681] do_syscall_64+0x3f/0x90 [ 31.906213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.906936] [ 31.907183] The buggy address belongs to the object at ffff88801a1ed000 [ 31.907183] which belongs to the cache vm_area_struct of size 168 [ 31.908850] The buggy address is located 88 bytes inside of [ 31.908850] freed 168-byte region [ffff88801a1ed000, ffff88801a1ed0a8) [ 31.910446] [ 31.910690] The buggy address belongs to the physical page: [ 31.911457] page:00000000b0e01998 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ed [ 31.912674] memcg:ffff88800dd71301 [ 31.913133] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.913813] page_type: 0xffffffff() [ 31.914285] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.915280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd71301 [ 31.916242] page dumped because: kasan: bad access detected [ 31.916945] [ 31.917172] Memory state around the buggy address: [ 31.917800] ffff88801a1ecf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.918730] ffff88801a1ecf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.919660] >ffff88801a1ed000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.920598] ^ [ 31.921395] ffff88801a1ed080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.922333] ffff88801a1ed100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.923286] ================================================================== [ 31.924331] Disabling lock debugging due to kernel taint [ 33.809338] BUG: Bad rss-counter state mm:000000005b3eaf5b type:MM_FILEPAGES val:33 [ 33.810493] BUG: Bad rss-counter state mm:000000005b3eaf5b type:MM_ANONPAGES val:22 [ 34.324426] BUG: Bad rss-counter state mm:000000002eefa5d9 type:MM_FILEPAGES val:33 [ 34.325556] BUG: Bad rss-counter state mm:000000002eefa5d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10553' (ECDSA) to the list of known hosts. 2023/06/19 22:51:57 fuzzer started 2023/06/19 22:51:57 dialing manager at localhost:44161 2023/06/19 22:51:57 checking machine... 2023/06/19 22:51:57 checking revisions... [ 34.936804] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:51:57 testing simple program... [ 34.986886] cgroup: Unknown subsys name 'net' [ 35.027051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:51:55 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000007 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff8880183af6f8 R8 =ffffffff86088c1a R9 =ffff8880183af840 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88420 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000287 [--S--PC] 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 00007f4566dbe900 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=00007ffd2ad4d000 CR3=0000000008dbe000 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=00007f2d38238970 CR3=000000000979a000 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=8fd9996e19f5db893249d4ac918ab1c0 XMM02=000000000011f5c8ec2efd57dc4c00df XMM03=0000000000123d68428789bce2b5b166 XMM04=b7b5ad0158fcfde800000000000ae988 XMM05=aa3ba333f724930a0000000000134720 XMM06=806171799158d96700000000001337c0 XMM07=e042d86d42eb936e0000000000123fe8 XMM08=428789bce2b5b166000000000011f628 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000