syzkaller login: [ 58.904179] BUG: Bad rss-counter state mm:000000000e33560b type:MM_FILEPAGES val:33 [ 58.905381] BUG: Bad rss-counter state mm:000000000e33560b type:MM_ANONPAGES val:22 [ 59.054215] ================================================================== [ 59.055130] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.056078] Read of size 8 at addr ffff88800eceded8 by task sshd/226 [ 59.056850] [ 59.057070] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 59.058059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.059065] Call Trace: [ 59.059385] [ 59.059671] dump_stack_lvl+0x91/0xf0 [ 59.060158] print_report+0xcc/0x620 [ 59.060647] ? __virt_addr_valid+0x102/0x340 [ 59.061200] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.061831] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.062452] kasan_report+0xbe/0xf0 [ 59.062933] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.063571] vma_interval_tree_remove+0xc75/0xec0 [ 59.064194] vma_prepare+0xc54/0x11a0 [ 59.064685] __split_vma+0x5af/0x950 [ 59.065170] ? __pfx___split_vma+0x10/0x10 [ 59.065730] ? find_held_lock+0x2c/0x110 [ 59.066272] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.066860] ? lock_is_held_type+0x9f/0x120 [ 59.067411] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.068042] ? mtree_range_walk+0x632/0x900 [ 59.068610] ? mas_walk+0x5c7/0x7c0 [ 59.069109] do_vmi_munmap+0x1f1/0x2b0 [ 59.069642] mmap_region+0x1f9/0x2660 [ 59.070143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.070670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.071409] ? __pfx_lock_acquire+0x10/0x10 [ 59.071960] ? __pfx_mmap_region+0x10/0x10 [ 59.072512] ? security_mmap_addr+0x7d/0xa0 [ 59.073058] ? get_unmapped_area+0x1f5/0x3f0 [ 59.073639] do_mmap+0x854/0xf00 [ 59.074093] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.074609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.075187] ksys_mmap_pgoff+0x3af/0x500 [ 59.075723] do_syscall_64+0x3f/0x90 [ 59.076215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.076890] RIP: 0033:0x7f8b8ffd7d82 [ 59.077365] 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 [ 59.079608] RSP: 002b:00007ffd5ae40ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.080542] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b8ffd7d82 [ 59.081420] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b8f411000 [ 59.082320] RBP: 00007f8b8f411000 R08: 0000000000000009 R09: 0000000000001000 [ 59.083196] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3a9247f60 [ 59.084077] R13: 00007ffd5ae40f00 R14: 00007ffd5ae40f30 R15: 00007ffd5ae41290 [ 59.084967] [ 59.085267] [ 59.085496] Allocated by task 219: [ 59.085966] kasan_save_stack+0x22/0x50 [ 59.086498] kasan_set_track+0x25/0x30 [ 59.087018] __kasan_slab_alloc+0x59/0x70 [ 59.087571] kmem_cache_alloc+0x16b/0x370 [ 59.088106] vm_area_dup+0x20/0x160 [ 59.088578] __split_vma+0x170/0x950 [ 59.089072] split_vma+0xc6/0x110 [ 59.089542] mprotect_fixup+0x8d2/0xb30 [ 59.090060] do_mprotect_pkey+0x87e/0xd40 [ 59.090602] __x64_sys_mprotect+0x78/0xc0 [ 59.091148] do_syscall_64+0x3f/0x90 [ 59.091633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.092303] [ 59.092528] Freed by task 219: [ 59.092931] kasan_save_stack+0x22/0x50 [ 59.093449] kasan_set_track+0x25/0x30 [ 59.093972] kasan_save_free_info+0x2b/0x50 [ 59.094533] __kasan_slab_free+0x10a/0x190 [ 59.095079] kmem_cache_free+0x10d/0x4d0 [ 59.095616] rcu_core+0x8c8/0x2860 [ 59.096083] __do_softirq+0x1b7/0x7d4 [ 59.096576] [ 59.096797] Last potentially related work creation: [ 59.097406] kasan_save_stack+0x22/0x50 [ 59.097954] __kasan_record_aux_stack+0x8e/0xa0 [ 59.098551] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.099213] remove_vma+0x139/0x170 [ 59.099692] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.100266] do_vmi_munmap+0x1f1/0x2b0 [ 59.100768] __vm_munmap+0x138/0x3a0 [ 59.101261] __x64_sys_munmap+0x59/0x80 [ 59.101784] do_syscall_64+0x3f/0x90 [ 59.102277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.102947] [ 59.103172] The buggy address belongs to the object at ffff88800ecede80 [ 59.103172] which belongs to the cache vm_area_struct of size 168 [ 59.104703] The buggy address is located 88 bytes inside of [ 59.104703] freed 168-byte region [ffff88800ecede80, ffff88800ecedf28) [ 59.106188] [ 59.106412] The buggy address belongs to the physical page: [ 59.107097] page:00000000669120d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeced [ 59.108223] memcg:ffff8880180d7d01 [ 59.108664] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.109332] page_type: 0xffffffff() [ 59.109809] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.110764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180d7d01 [ 59.111705] page dumped because: kasan: bad access detected [ 59.112396] [ 59.112618] Memory state around the buggy address: [ 59.113224] ffff88800ecedd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.114133] ffff88800ecede00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 59.115018] >ffff88800ecede80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.115908] ^ [ 59.116672] ffff88800ecedf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 59.117565] ffff88800ecedf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 59.118447] ================================================================== [ 59.119465] Disabling lock debugging due to kernel taint [ 61.659708] BUG: Bad rss-counter state mm:000000005e39bc4f type:MM_FILEPAGES val:33 [ 61.660721] BUG: Bad rss-counter state mm:000000005e39bc4f type:MM_ANONPAGES val:22 [ 62.154159] BUG: Bad rss-counter state mm:0000000014ed3aec type:MM_FILEPAGES val:33 [ 62.155142] BUG: Bad rss-counter state mm:0000000014ed3aec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35468' (ECDSA) to the list of known hosts. 2023/06/20 06:40:52 fuzzer started 2023/06/20 06:40:52 dialing manager at localhost:44161 2023/06/20 06:40:52 checking machine... 2023/06/20 06:40:52 checking revisions... [ 62.837744] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:40:52 testing simple program... [ 62.887754] cgroup: Unknown subsys name 'net' [ 62.931895] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:40:24 Registers: info registers vcpu 0 RAX=0101010101010101 RBX=ffff88800cc08720 RCX=0000000000000000 RDX=000000000000001e RSI=0000000000000000 RDI=ffffed10019810e4 RBP=00000000000000f0 RSP=ffff88800fb47bc8 R8 =ffff88800cc08720 R9 =0000000000000000 R10=ffffed10019810e4 R11=ffffffff81806df1 R12=ffff88800cc08720 R13=0000000000092cc0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff8450d3e5 RFL=00000216 [----AP-] 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 00007f68035e2900 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=00007f6803b97650 CR3=000000000fe34000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffcffa12cf8 CR3=0000000009cc6000 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=2032353a30343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a30343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000