syzkaller login: [ 59.915387] BUG: Bad rss-counter state mm:00000000134fabdf type:MM_FILEPAGES val:33 [ 59.916027] BUG: Bad rss-counter state mm:00000000134fabdf type:MM_ANONPAGES val:22 [ 60.047174] ================================================================== [ 60.047803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.048390] Read of size 8 at addr ffff88800def6140 by task sshd/222 [ 60.048883] [ 60.049047] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 60.049755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.050429] Call Trace: [ 60.050638] [ 60.050828] dump_stack_lvl+0x91/0xf0 [ 60.051133] print_report+0xcc/0x620 [ 60.051564] ? __virt_addr_valid+0x102/0x340 [ 60.051993] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.052467] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.052915] kasan_report+0xbe/0xf0 [ 60.053242] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.053698] vma_interval_tree_remove+0xc75/0xec0 [ 60.054120] vma_prepare+0xc54/0x11a0 [ 60.054457] __split_vma+0x5af/0x950 [ 60.054758] ? __pfx___split_vma+0x10/0x10 [ 60.055097] ? find_held_lock+0x2c/0x110 [ 60.055462] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.055842] ? lock_is_held_type+0x9f/0x120 [ 60.056182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.056560] ? mtree_range_walk+0x632/0x900 [ 60.056904] ? mas_walk+0x5c7/0x7c0 [ 60.057203] do_vmi_munmap+0x1f1/0x2b0 [ 60.057520] mmap_region+0x1f9/0x2660 [ 60.057824] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.058148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.058660] ? __pfx_lock_acquire+0x10/0x10 [ 60.059021] ? __pfx_mmap_region+0x10/0x10 [ 60.059379] ? security_mmap_addr+0x7d/0xa0 [ 60.059715] ? get_unmapped_area+0x1f5/0x3f0 [ 60.060081] do_mmap+0x854/0xf00 [ 60.060376] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.060732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.061129] ksys_mmap_pgoff+0x3af/0x500 [ 60.061463] do_syscall_64+0x3f/0x90 [ 60.061776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.062200] RIP: 0033:0x7f88aa9c6d82 [ 60.062539] 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 [ 60.063922] RSP: 002b:00007fff72270d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.064546] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88aa9c6d82 [ 60.065120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88a9e00000 [ 60.065687] RBP: 00007f88a9e00000 R08: 0000000000000009 R09: 0000000000001000 [ 60.066287] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eac76f3ec0 [ 60.066966] R13: 00007fff72270d30 R14: 00007fff72270d60 R15: 00007fff722710c0 [ 60.067596] [ 60.067797] [ 60.067941] Allocated by task 215: [ 60.068232] kasan_save_stack+0x22/0x50 [ 60.068591] kasan_set_track+0x25/0x30 [ 60.068954] __kasan_slab_alloc+0x59/0x70 [ 60.069357] kmem_cache_alloc+0x16b/0x370 [ 60.069730] vm_area_dup+0x20/0x160 [ 60.070046] __split_vma+0x170/0x950 [ 60.070382] split_vma+0xc6/0x110 [ 60.070687] mprotect_fixup+0x8d2/0xb30 [ 60.071056] do_mprotect_pkey+0x87e/0xd40 [ 60.071452] __x64_sys_mprotect+0x78/0xc0 [ 60.071834] do_syscall_64+0x3f/0x90 [ 60.072137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.072562] [ 60.072711] Freed by task 13: [ 60.072984] kasan_save_stack+0x22/0x50 [ 60.073323] kasan_set_track+0x25/0x30 [ 60.073639] kasan_save_free_info+0x2b/0x50 [ 60.073986] __kasan_slab_free+0x10a/0x190 [ 60.074394] kmem_cache_free+0x10d/0x4d0 [ 60.074755] rcu_core+0x8c8/0x2860 [ 60.075066] __do_softirq+0x1b7/0x7d4 [ 60.075420] [ 60.075578] Last potentially related work creation: [ 60.076007] kasan_save_stack+0x22/0x50 [ 60.076364] __kasan_record_aux_stack+0x8e/0xa0 [ 60.076759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.077210] remove_vma+0x139/0x170 [ 60.077518] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.077894] do_vmi_munmap+0x1f1/0x2b0 [ 60.078225] __vm_munmap+0x138/0x3a0 [ 60.078576] __x64_sys_munmap+0x59/0x80 [ 60.078916] do_syscall_64+0x3f/0x90 [ 60.079248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.079667] [ 60.079806] The buggy address belongs to the object at ffff88800def60e8 [ 60.079806] which belongs to the cache vm_area_struct of size 168 [ 60.080792] The buggy address is located 88 bytes inside of [ 60.080792] freed 168-byte region [ffff88800def60e8, ffff88800def6190) [ 60.081678] [ 60.081822] The buggy address belongs to the physical page: [ 60.082266] page:0000000070c66f2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef6 [ 60.083041] memcg:ffff88800c76a101 [ 60.083325] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.083754] page_type: 0xffffffff() [ 60.084060] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.084705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c76a101 [ 60.085343] page dumped because: kasan: bad access detected [ 60.085802] [ 60.085947] Memory state around the buggy address: [ 60.086379] ffff88800def6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.086958] ffff88800def6080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 60.087531] >ffff88800def6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.088105] ^ [ 60.088535] ffff88800def6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 60.089110] ffff88800def6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 60.089683] ================================================================== [ 60.090469] Disabling lock debugging due to kernel taint [ 61.465875] BUG: Bad rss-counter state mm:00000000a80c99f4 type:MM_FILEPAGES val:33 [ 61.466598] BUG: Bad rss-counter state mm:00000000a80c99f4 type:MM_ANONPAGES val:22 [ 61.820692] BUG: Bad rss-counter state mm:00000000c13bf131 type:MM_FILEPAGES val:33 [ 61.821375] BUG: Bad rss-counter state mm:00000000c13bf131 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50812' (ECDSA) to the list of known hosts. 2023/06/20 08:56:45 fuzzer started 2023/06/20 08:56:45 dialing manager at localhost:44161 2023/06/20 08:56:45 checking machine... 2023/06/20 08:56:45 checking revisions... [ 62.420739] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:56:46 testing simple program... [ 62.464313] cgroup: Unknown subsys name 'net' [ 62.507877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fa8bbfaf020 CR3=000000000c5aa000 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=2035343a36353a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800f166af8 RCX=ffffffff812bc666 RDX=0000000000000001 RSI=0000000000000008 RDI=ffff888015bafd70 RBP=0000000000000100 RSP=ffff888015bafd40 R8 =0000000000000001 R9 =ffffed1001e2cd5f R10=ffff88800f166aff R11=0000000000000000 R12=1ffff11002b75faa R13=8000000000000007 R14=ffff88801687db08 R15=ffff88801687db10 RIP=ffffffff8180eea7 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f596481f900 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=00007ffc0224f000 CR3=00000000097c4000 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=000000000000000000000000000000ff XMM02=98292eb683342fa57334387a1b8b1a52 XMM03=f14708345227b328e0984d32c4ce62c8 XMM04=5ebde9fa94ce27b1767f7d038dc260bb XMM05=000000000000000000000000000000ff XMM06=5e47083452272728767f4d038dc260bb XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000