syzkaller login: [ 74.491528] BUG: Bad rss-counter state mm:000000003c5ec4aa type:MM_FILEPAGES val:33 [ 74.492261] BUG: Bad rss-counter state mm:000000003c5ec4aa type:MM_ANONPAGES val:22 [ 74.624962] ================================================================== [ 74.625677] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 74.626368] Read of size 8 at addr ffff888019e18310 by task sshd/224 [ 74.626926] [ 74.627088] CPU: 1 PID: 224 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 74.627869] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 74.628766] Call Trace: [ 74.629005] [ 74.629211] dump_stack_lvl+0x91/0xf0 [ 74.629568] print_report+0xcc/0x620 [ 74.629925] ? __virt_addr_valid+0x102/0x340 [ 74.630323] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.630775] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.631244] kasan_report+0xbe/0xf0 [ 74.631597] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.632050] vma_interval_tree_remove+0xc75/0xec0 [ 74.632484] vma_prepare+0xc54/0x11a0 [ 74.632841] __split_vma+0x5af/0x950 [ 74.633198] ? __pfx___split_vma+0x10/0x10 [ 74.633618] ? find_held_lock+0x2c/0x110 [ 74.633988] do_vmi_align_munmap+0x2ba/0x11f0 [ 74.634395] ? lock_is_held_type+0x9f/0x120 [ 74.634803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 74.635282] ? mtree_range_walk+0x632/0x900 [ 74.635673] ? mas_walk+0x5c7/0x7c0 [ 74.636017] do_vmi_munmap+0x1f1/0x2b0 [ 74.636377] mmap_region+0x1f9/0x2660 [ 74.636734] ? vm_mmap_pgoff+0x15c/0x3a0 [ 74.637099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 74.637611] ? __pfx_lock_acquire+0x10/0x10 [ 74.638006] ? __pfx_mmap_region+0x10/0x10 [ 74.638386] ? security_mmap_addr+0x7d/0xa0 [ 74.638781] ? get_unmapped_area+0x1f5/0x3f0 [ 74.639198] do_mmap+0x854/0xf00 [ 74.639524] vm_mmap_pgoff+0x1a6/0x3a0 [ 74.639881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 74.640294] ksys_mmap_pgoff+0x3af/0x500 [ 74.640667] do_syscall_64+0x3f/0x90 [ 74.641028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.641532] RIP: 0033:0x7fc17a658d82 [ 74.641861] 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 [ 74.643458] RSP: 002b:00007ffdf0fdd548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 74.644125] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc17a658d82 [ 74.644766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc179a92000 [ 74.645390] RBP: 00007fc179a92000 R08: 0000000000000009 R09: 0000000000001000 [ 74.646004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acb72b5f70 [ 74.646622] R13: 00007ffdf0fdd560 R14: 00007ffdf0fdd590 R15: 00007ffdf0fdd8f0 [ 74.647289] [ 74.647511] [ 74.647675] Allocated by task 217: [ 74.647993] kasan_save_stack+0x22/0x50 [ 74.648365] kasan_set_track+0x25/0x30 [ 74.648731] __kasan_slab_alloc+0x59/0x70 [ 74.649115] kmem_cache_alloc+0x16b/0x370 [ 74.649493] vm_area_dup+0x20/0x160 [ 74.649823] __split_vma+0x170/0x950 [ 74.650163] split_vma+0xc6/0x110 [ 74.650487] mprotect_fixup+0x8d2/0xb30 [ 74.650849] do_mprotect_pkey+0x87e/0xd40 [ 74.651248] __x64_sys_mprotect+0x78/0xc0 [ 74.651638] do_syscall_64+0x3f/0x90 [ 74.651992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.652459] [ 74.652615] Freed by task 217: [ 74.652916] kasan_save_stack+0x22/0x50 [ 74.653282] kasan_set_track+0x25/0x30 [ 74.653643] kasan_save_free_info+0x2b/0x50 [ 74.654017] __kasan_slab_free+0x10a/0x190 [ 74.654404] kmem_cache_free+0x10d/0x4d0 [ 74.654779] rcu_core+0x8c8/0x2860 [ 74.655108] __do_softirq+0x1b7/0x7d4 [ 74.655496] [ 74.655653] Last potentially related work creation: [ 74.656081] kasan_save_stack+0x22/0x50 [ 74.656450] __kasan_record_aux_stack+0x8e/0xa0 [ 74.656876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 74.657352] remove_vma+0x139/0x170 [ 74.657681] do_vmi_align_munmap+0xd4a/0x11f0 [ 74.658102] do_vmi_munmap+0x1f1/0x2b0 [ 74.658449] __vm_munmap+0x138/0x3a0 [ 74.658787] __x64_sys_munmap+0x59/0x80 [ 74.659160] do_syscall_64+0x3f/0x90 [ 74.659516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.660038] [ 74.660199] The buggy address belongs to the object at ffff888019e182b8 [ 74.660199] which belongs to the cache vm_area_struct of size 168 [ 74.661280] The buggy address is located 88 bytes inside of [ 74.661280] freed 168-byte region [ffff888019e182b8, ffff888019e18360) [ 74.662309] [ 74.662471] The buggy address belongs to the physical page: [ 74.662954] page:00000000a50530d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e18 [ 74.663769] memcg:ffff88800edeb501 [ 74.664083] flags: 0x100000000000200(slab|node=0|zone=1) [ 74.664556] page_type: 0xffffffff() [ 74.664887] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 74.665558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edeb501 [ 74.666206] page dumped because: kasan: bad access detected [ 74.666711] [ 74.666870] Memory state around the buggy address: [ 74.667307] ffff888019e18200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 74.667989] ffff888019e18280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 74.668630] >ffff888019e18300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 74.669248] ^ [ 74.669599] ffff888019e18380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 74.670357] ffff888019e18400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 74.670989] ================================================================== [ 74.671753] Disabling lock debugging due to kernel taint [ 76.192378] BUG: Bad rss-counter state mm:00000000bc196f62 type:MM_FILEPAGES val:33 [ 76.193146] BUG: Bad rss-counter state mm:00000000bc196f62 type:MM_ANONPAGES val:22 [ 76.604163] BUG: Bad rss-counter state mm:0000000070dc7536 type:MM_FILEPAGES val:33 [ 76.605229] BUG: Bad rss-counter state mm:0000000070dc7536 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59299' (ECDSA) to the list of known hosts. 2023/06/20 09:09:45 fuzzer started 2023/06/20 09:09:45 dialing manager at localhost:44161 2023/06/20 09:09:45 checking machine... 2023/06/20 09:09:45 checking revisions... [ 77.237909] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:09:46 testing simple program... [ 77.276130] cgroup: Unknown subsys name 'net' [ 77.340768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:09:10 Registers: info registers vcpu 0 RAX=ffff88800d62f000 RBX=0000000000000053 RCX=0000000000000000 RDX=1ffff11001ac5e1a RSI=ffffffff83698637 RDI=ffff88800d62f0d0 RBP=0000000000000053 RSP=ffff888017d278e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000053 R11=00676f6c2d766564 R12=ffff88800ed31800 R13=0000000000000053 R14=ffff888017d27e70 R15=ffff88800d62f000 RIP=ffffffff83698676 RFL=00000286 [--S--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 00007f9a2e36b700 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=00007f966f08b0b0 CR3=0000000015d0e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3533325b646873732035343a3930 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383234 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f2bc564d230 CR3=0000000015d0e000 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=2035343a39303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a39303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000