[ 24.531736] BUG: Bad rss-counter state mm:0000000096f1d01e type:MM_FILEPAGES val:33 [ 24.532448] BUG: Bad rss-counter state mm:0000000096f1d01e type:MM_ANONPAGES val:22 [ 24.626044] ================================================================== [ 24.626544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.627059] Read of size 8 at addr ffff88800e9f8058 by task sshd/219 [ 24.627476] [ 24.627593] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.628064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.628594] Call Trace: [ 24.628771] [ 24.628926] dump_stack_lvl+0x91/0xf0 [ 24.629193] print_report+0xcc/0x620 [ 24.629458] ? __virt_addr_valid+0x102/0x340 [ 24.629759] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.630095] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.630431] kasan_report+0xbe/0xf0 [ 24.630687] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.631036] vma_interval_tree_remove+0xc75/0xec0 [ 24.631361] vma_prepare+0xc54/0x11a0 [ 24.631622] __split_vma+0x5af/0x950 [ 24.631978] ? __pfx___split_vma+0x10/0x10 [ 24.632285] ? find_held_lock+0x2c/0x110 [ 24.632571] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.632877] ? lock_is_held_type+0x9f/0x120 [ 24.633174] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.633506] ? mtree_range_walk+0x632/0x900 [ 24.633811] ? mas_walk+0x5c7/0x7c0 [ 24.634070] do_vmi_munmap+0x1f1/0x2b0 [ 24.634360] mmap_region+0x1f9/0x2660 [ 24.634622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.634900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.635439] ? __pfx_lock_acquire+0x10/0x10 [ 24.635851] ? __pfx_mmap_region+0x10/0x10 [ 24.636258] ? security_mmap_addr+0x7d/0xa0 [ 24.636666] ? get_unmapped_area+0x1f5/0x3f0 [ 24.637094] do_mmap+0x854/0xf00 [ 24.637437] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.637821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.638254] ksys_mmap_pgoff+0x3af/0x500 [ 24.638651] do_syscall_64+0x3f/0x90 [ 24.639018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.639516] RIP: 0033:0x7fb25a9c6d82 [ 24.639882] 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 [ 24.641369] RSP: 002b:00007ffd1328fd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.641876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb25a9c6d82 [ 24.642362] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb259e00000 [ 24.642839] RBP: 00007fb259e00000 R08: 0000000000000009 R09: 0000000000001000 [ 24.643328] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561aa2648b20 [ 24.643800] R13: 00007ffd1328fd60 R14: 00007ffd1328fd90 R15: 00007ffd132900f0 [ 24.644282] [ 24.644445] [ 24.644569] Allocated by task 211: [ 24.644818] kasan_save_stack+0x22/0x50 [ 24.645100] kasan_set_track+0x25/0x30 [ 24.645374] __kasan_slab_alloc+0x59/0x70 [ 24.645676] kmem_cache_alloc+0x16b/0x370 [ 24.645958] vm_area_dup+0x20/0x160 [ 24.646208] __split_vma+0x170/0x950 [ 24.646464] split_vma+0xc6/0x110 [ 24.646707] mprotect_fixup+0x8d2/0xb30 [ 24.646981] do_mprotect_pkey+0x87e/0xd40 [ 24.647265] __x64_sys_mprotect+0x78/0xc0 [ 24.647550] do_syscall_64+0x3f/0x90 [ 24.647812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.648176] [ 24.648295] Freed by task 19: [ 24.648508] kasan_save_stack+0x22/0x50 [ 24.648787] kasan_set_track+0x25/0x30 [ 24.649066] kasan_save_free_info+0x2b/0x50 [ 24.649358] __kasan_slab_free+0x10a/0x190 [ 24.649649] kmem_cache_free+0x10d/0x4d0 [ 24.649926] rcu_core+0x8c8/0x2860 [ 24.650173] __do_softirq+0x1b7/0x7d4 [ 24.650435] [ 24.650554] Last potentially related work creation: [ 24.650873] kasan_save_stack+0x22/0x50 [ 24.651150] __kasan_record_aux_stack+0x8e/0xa0 [ 24.651466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.651818] remove_vma+0x139/0x170 [ 24.652085] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.652388] do_vmi_munmap+0x1f1/0x2b0 [ 24.652655] __vm_munmap+0x138/0x3a0 [ 24.652912] __x64_sys_munmap+0x59/0x80 [ 24.653189] do_syscall_64+0x3f/0x90 [ 24.653448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.653800] [ 24.653919] The buggy address belongs to the object at ffff88800e9f8000 [ 24.653919] which belongs to the cache vm_area_struct of size 168 [ 24.654721] The buggy address is located 88 bytes inside of [ 24.654721] freed 168-byte region [ffff88800e9f8000, ffff88800e9f80a8) [ 24.655482] [ 24.655607] The buggy address belongs to the physical page: [ 24.655999] page:000000002c11c866 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9f8 [ 24.656626] memcg:ffff88800dbc9d01 [ 24.656870] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.657240] page_type: 0xffffffff() [ 24.657501] raw: 0100000000000200 ffff88800879fc80 ffffea000038ee80 dead000000000002 [ 24.658031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbc9d01 [ 24.658549] page dumped because: kasan: bad access detected [ 24.658930] [ 24.659056] Memory state around the buggy address: [ 24.659395] ffff88800e9f7f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.659901] ffff88800e9f7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.660401] >ffff88800e9f8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.660895] ^ [ 24.661314] ffff88800e9f8080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.661815] ffff88800e9f8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.662303] ================================================================== [ 24.662872] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.527881] BUG: Bad rss-counter state mm:000000006aa8e267 type:MM_FILEPAGES val:33 [ 26.529128] BUG: Bad rss-counter state mm:000000006aa8e267 type:MM_ANONPAGES val:22 [ 27.018189] BUG: Bad rss-counter state mm:000000009223a4ee type:MM_FILEPAGES val:33 [ 27.019604] BUG: Bad rss-counter state mm:000000009223a4ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40368' (ECDSA) to the list of known hosts. 2023/06/20 02:52:44 fuzzer started 2023/06/20 02:52:44 dialing manager at localhost:44161 2023/06/20 02:52:44 checking machine... 2023/06/20 02:52:44 checking revisions... [ 27.727110] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:52:44 testing simple program... [ 27.779375] cgroup: Unknown subsys name 'net' [ 27.836309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:52:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8613751a RDX=1ffff1100d9c135f RSI=1ffff1100d9c135e RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff811310ce 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 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=00007fd803c79000 CR3=0000000018298000 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=2033343a32353a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a32353a3230203032 XMM08=3d656e696c646d632022656369767265 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=00007f81350bf618 CR3=0000000018298000 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=32353a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383636 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000