syzkaller login: [ 23.712440] BUG: Bad rss-counter state mm:00000000636f547d type:MM_FILEPAGES val:33 [ 23.714156] BUG: Bad rss-counter state mm:00000000636f547d type:MM_ANONPAGES val:22 [ 23.875411] ================================================================== [ 23.876389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.877351] Read of size 8 at addr ffff8880183233f8 by task sshd/220 [ 23.878318] [ 23.878548] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.879440] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.880465] Call Trace: [ 23.880794] [ 23.881084] dump_stack_lvl+0x91/0xf0 [ 23.881594] print_report+0xcc/0x620 [ 23.882100] ? __virt_addr_valid+0x102/0x340 [ 23.882675] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.883336] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.883967] kasan_report+0xbe/0xf0 [ 23.884462] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.885110] vma_interval_tree_remove+0xc75/0xec0 [ 23.885728] vma_prepare+0xc54/0x11a0 [ 23.886221] __split_vma+0x5af/0x950 [ 23.886704] ? __pfx___split_vma+0x10/0x10 [ 23.887241] ? find_held_lock+0x2c/0x110 [ 23.887792] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.888376] ? lock_is_held_type+0x9f/0x120 [ 23.888936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.889567] ? mtree_range_walk+0x632/0x900 [ 23.890136] ? mas_walk+0x5c7/0x7c0 [ 23.890624] do_vmi_munmap+0x1f1/0x2b0 [ 23.891140] mmap_region+0x1f9/0x2660 [ 23.891657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.892182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.892926] ? __pfx_lock_acquire+0x10/0x10 [ 23.893482] ? __pfx_mmap_region+0x10/0x10 [ 23.894039] ? security_mmap_addr+0x7d/0xa0 [ 23.894589] ? get_unmapped_area+0x1f5/0x3f0 [ 23.895158] do_mmap+0x854/0xf00 [ 23.895636] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.896146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.896730] ksys_mmap_pgoff+0x3af/0x500 [ 23.897272] do_syscall_64+0x3f/0x90 [ 23.897763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.898443] RIP: 0033:0x7fe0cbd51d82 [ 23.898922] 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 [ 23.901156] RSP: 002b:00007ffd4eeecc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.902116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0cbd51d82 [ 23.903019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0cb18b000 [ 23.903924] RBP: 00007fe0cb18b000 R08: 0000000000000009 R09: 0000000000001000 [ 23.904828] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585a9f94b20 [ 23.905727] R13: 00007ffd4eeecc20 R14: 00007ffd4eeecc50 R15: 00007ffd4eeecfb0 [ 23.906635] [ 23.906944] [ 23.907166] Allocated by task 213: [ 23.907641] kasan_save_stack+0x22/0x50 [ 23.908178] kasan_set_track+0x25/0x30 [ 23.908688] __kasan_slab_alloc+0x59/0x70 [ 23.909224] kmem_cache_alloc+0x16b/0x370 [ 23.909768] vm_area_dup+0x20/0x160 [ 23.910244] __split_vma+0x170/0x950 [ 23.910743] split_vma+0xc6/0x110 [ 23.911204] mprotect_fixup+0x8d2/0xb30 [ 23.911736] do_mprotect_pkey+0x87e/0xd40 [ 23.912291] __x64_sys_mprotect+0x78/0xc0 [ 23.912842] do_syscall_64+0x3f/0x90 [ 23.913339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.914007] [ 23.914233] Freed by task 213: [ 23.914644] kasan_save_stack+0x22/0x50 [ 23.915180] kasan_set_track+0x25/0x30 [ 23.915717] kasan_save_free_info+0x2b/0x50 [ 23.916275] __kasan_slab_free+0x10a/0x190 [ 23.916833] kmem_cache_free+0x10d/0x4d0 [ 23.917362] rcu_core+0x8c8/0x2860 [ 23.917816] __do_softirq+0x1b7/0x7d4 [ 23.918314] [ 23.918538] Last potentially related work creation: [ 23.919162] kasan_save_stack+0x22/0x50 [ 23.919693] __kasan_record_aux_stack+0x8e/0xa0 [ 23.920287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.920969] remove_vma+0x139/0x170 [ 23.921455] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.922044] do_vmi_munmap+0x1f1/0x2b0 [ 23.922558] __vm_munmap+0x138/0x3a0 [ 23.923049] __x64_sys_munmap+0x59/0x80 [ 23.923583] do_syscall_64+0x3f/0x90 [ 23.924086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.924771] [ 23.924995] The buggy address belongs to the object at ffff8880183233a0 [ 23.924995] which belongs to the cache vm_area_struct of size 168 [ 23.926545] The buggy address is located 88 bytes inside of [ 23.926545] freed 168-byte region [ffff8880183233a0, ffff888018323448) [ 23.928053] [ 23.928284] The buggy address belongs to the physical page: [ 23.928990] page:0000000098e7060e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18323 [ 23.930149] memcg:ffff88801696b901 [ 23.930608] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.931286] page_type: 0xffffffff() [ 23.931764] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.932732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801696b901 [ 23.933694] page dumped because: kasan: bad access detected [ 23.934386] [ 23.934613] Memory state around the buggy address: [ 23.935220] ffff888018323280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.936138] ffff888018323300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.937051] >ffff888018323380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.937976] ^ [ 23.938855] ffff888018323400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.939789] ffff888018323480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.940693] ================================================================== [ 23.941891] Disabling lock debugging due to kernel taint [ 26.360479] BUG: Bad rss-counter state mm:00000000627e37a3 type:MM_FILEPAGES val:33 [ 26.361724] BUG: Bad rss-counter state mm:00000000627e37a3 type:MM_ANONPAGES val:22 [ 26.887688] BUG: Bad rss-counter state mm:000000003fd5dd19 type:MM_FILEPAGES val:33 [ 26.888848] BUG: Bad rss-counter state mm:000000003fd5dd19 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44509' (ECDSA) to the list of known hosts. 2023/06/20 13:13:36 fuzzer started 2023/06/20 13:13:36 dialing manager at localhost:36067 2023/06/20 13:13:36 checking machine... 2023/06/20 13:13:36 checking revisions... [ 27.597334] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:13:36 testing simple program... [ 27.655635] cgroup: Unknown subsys name 'net' [ 27.694749] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:13:36 Registers: info registers vcpu 0 RAX=fffffffffb8dcd74 RBX=ffffffff85deea1c RCX=ffffffff816cb7e9 RDX=0000000000000000 RSI=ffffffff86121d74 RDI=ffffffff85deea0c RBP=ffffffff85deea0c RSP=ffff88800f177790 R8 =ffffffff86121d74 R9 =ffff88800f177888 R10=0000000000038001 R11=000000000001d012 R12=ffffffff85deea30 R13=ffffffff85deea0c R14=ffffffff85deea0c R15=dffffc0000000000 RIP=ffffffff8112fc93 RFL=00000246 [---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 00007ff3b21d4900 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=00007ff3b278b618 CR3=0000000016a1c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fce0044c008 CR3=000000000c9d2000 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=fc4d74a8632dbea4b84abeb8f46102e4 XMM02=000000000011bfc0eff9b2d0a8fce9cb XMM03=000000000011c0902c67c8bc2e329bc3 XMM04=7a4e5ddce91b690e00000000000ae988 XMM05=f3683d2bea50d3ba0000000000133770 XMM06=4fda316b135da52b00000000001324a0 XMM07=e042d86d42eb936e00000000001229f8 XMM08=563246db32cb3e28000000000011c090 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000