syzkaller login: [ 31.552206] BUG: Bad rss-counter state mm:00000000398593b4 type:MM_FILEPAGES val:33 [ 31.553689] BUG: Bad rss-counter state mm:00000000398593b4 type:MM_ANONPAGES val:22 [ 31.596399] ================================================================== [ 31.597379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.598409] Read of size 8 at addr ffff88800d9916b0 by task sshd/221 [ 31.599181] [ 31.599404] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.600271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.601269] Call Trace: [ 31.601596] [ 31.601887] dump_stack_lvl+0x91/0xf0 [ 31.602381] print_report+0xcc/0x620 [ 31.602871] ? __virt_addr_valid+0x102/0x340 [ 31.603428] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.604046] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.604668] kasan_report+0xbe/0xf0 [ 31.605157] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.605794] vma_interval_tree_remove+0xc75/0xec0 [ 31.606403] vma_prepare+0xc54/0x11a0 [ 31.606912] __split_vma+0x5af/0x950 [ 31.607413] ? __pfx___split_vma+0x10/0x10 [ 31.607967] ? find_held_lock+0x2c/0x110 [ 31.608507] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.609118] ? lock_is_held_type+0x9f/0x120 [ 31.609684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.610325] ? mtree_range_walk+0x632/0x900 [ 31.610904] ? mas_walk+0x5c7/0x7c0 [ 31.611402] do_vmi_munmap+0x1f1/0x2b0 [ 31.611924] mmap_region+0x1f9/0x2660 [ 31.612426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.612983] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.613747] ? __pfx_lock_acquire+0x10/0x10 [ 31.614315] ? __pfx_mmap_region+0x10/0x10 [ 31.614878] ? security_mmap_addr+0x7d/0xa0 [ 31.615448] ? get_unmapped_area+0x1f5/0x3f0 [ 31.616021] do_mmap+0x854/0xf00 [ 31.616486] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.617015] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.617609] ksys_mmap_pgoff+0x3af/0x500 [ 31.618144] do_syscall_64+0x3f/0x90 [ 31.618646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.619324] RIP: 0033:0x7fa8f64b8d82 [ 31.619811] 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 [ 31.622069] RSP: 002b:00007ffe3c39ac98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.623019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8f64b8d82 [ 31.623902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8f58f2000 [ 31.624800] RBP: 00007fa8f58f2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.625700] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf03872b20 [ 31.626591] R13: 00007ffe3c39acb0 R14: 00007ffe3c39ace0 R15: 00007ffe3c39b040 [ 31.627500] [ 31.627806] [ 31.628030] Allocated by task 214: [ 31.628478] kasan_save_stack+0x22/0x50 [ 31.629017] kasan_set_track+0x25/0x30 [ 31.629538] __kasan_slab_alloc+0x59/0x70 [ 31.630087] kmem_cache_alloc+0x16b/0x370 [ 31.630628] vm_area_dup+0x20/0x160 [ 31.631107] __split_vma+0x170/0x950 [ 31.631597] split_vma+0xc6/0x110 [ 31.632063] mprotect_fixup+0x8d2/0xb30 [ 31.632589] do_mprotect_pkey+0x87e/0xd40 [ 31.633151] __x64_sys_mprotect+0x78/0xc0 [ 31.633704] do_syscall_64+0x3f/0x90 [ 31.634201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.634884] [ 31.635116] Freed by task 214: [ 31.635532] kasan_save_stack+0x22/0x50 [ 31.636056] kasan_set_track+0x25/0x30 [ 31.636568] kasan_save_free_info+0x2b/0x50 [ 31.637133] __kasan_slab_free+0x10a/0x190 [ 31.637699] kmem_cache_free+0x10d/0x4d0 [ 31.638240] rcu_core+0x8c8/0x2860 [ 31.638715] __do_softirq+0x1b7/0x7d4 [ 31.639213] [ 31.639443] Last potentially related work creation: [ 31.640065] kasan_save_stack+0x22/0x50 [ 31.640596] __kasan_record_aux_stack+0x8e/0xa0 [ 31.641219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.641896] remove_vma+0x139/0x170 [ 31.642370] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.642951] do_vmi_munmap+0x1f1/0x2b0 [ 31.643460] __vm_munmap+0x138/0x3a0 [ 31.643949] __x64_sys_munmap+0x59/0x80 [ 31.644465] do_syscall_64+0x3f/0x90 [ 31.644973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.645651] [ 31.645883] The buggy address belongs to the object at ffff88800d991658 [ 31.645883] which belongs to the cache vm_area_struct of size 168 [ 31.647418] The buggy address is located 88 bytes inside of [ 31.647418] freed 168-byte region [ffff88800d991658, ffff88800d991700) [ 31.648914] [ 31.649139] The buggy address belongs to the physical page: [ 31.649828] page:000000001459f602 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd991 [ 31.650956] memcg:ffff88800e262d01 [ 31.651405] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.652143] page_type: 0xffffffff() [ 31.652620] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.653600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e262d01 [ 31.654552] page dumped because: kasan: bad access detected [ 31.655247] [ 31.655473] Memory state around the buggy address: [ 31.656082] ffff88800d991580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.657002] ffff88800d991600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.657890] >ffff88800d991680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.658775] ^ [ 31.659384] ffff88800d991700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.660291] ffff88800d991780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.661187] ================================================================== [ 31.662308] Disabling lock debugging due to kernel taint [ 33.532788] BUG: Bad rss-counter state mm:00000000f45882d7 type:MM_FILEPAGES val:33 [ 33.533456] BUG: Bad rss-counter state mm:00000000f45882d7 type:MM_ANONPAGES val:22 [ 33.922990] BUG: Bad rss-counter state mm:00000000f8d63d7b type:MM_FILEPAGES val:33 [ 33.923855] BUG: Bad rss-counter state mm:00000000f8d63d7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61933' (ECDSA) to the list of known hosts. 2023/06/21 02:07:49 fuzzer started 2023/06/21 02:07:49 dialing manager at localhost:36067 2023/06/21 02:07:49 checking machine... 2023/06/21 02:07:49 checking revisions... [ 34.659058] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:07:50 testing simple program... [ 34.704927] cgroup: Unknown subsys name 'net' [ 34.746798] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:07:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f0287679480 CR3=000000000f7f8000 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=014c4f1f9d463ebe1a4a4052232cd13c XMM02=000000000011bee8eff9b2d0a8fce9cb XMM03=000000000011bfb82c67c8bc2e329bc3 XMM04=9cc83d7d87d8be2000000000000ae988 XMM05=6c7d0342a73ddd000000000000133640 XMM06=9c9f3358fcec4e7b0000000000132070 XMM07=fb795ef6d65770560000000000122588 XMM08=2c67c8bc2e329bc3000000000011bf58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800ec2f8c8 RSI=ffff88800ec2fc58 RDI=ffff88800ec2f8c8 RBP=ffff88800ec2f960 RSP=ffff88800ec2f8b8 R8 =0000000000000001 R9 =ffff88800ec2f908 R10=0000000000038001 R11=000000000000fc0c R12=ffff88800ec2f990 R13=0000000000000000 R14=ffff88801599d1c0 R15=ffff88800885fa58 RIP=ffffffff81130352 RFL=00000202 [-------] 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 00007f2395245900 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=00007ffc0e09f000 CR3=00000000159dc000 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=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