syzkaller login: [ 35.518418] BUG: Bad rss-counter state mm:000000008143b458 type:MM_FILEPAGES val:33 [ 35.519931] BUG: Bad rss-counter state mm:000000008143b458 type:MM_ANONPAGES val:22 [ 35.673731] ================================================================== [ 35.674669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.675607] Read of size 8 at addr ffff88801a21c968 by task sshd/220 [ 35.676392] [ 35.676613] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.677609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.678581] Call Trace: [ 35.678901] [ 35.679210] dump_stack_lvl+0x91/0xf0 [ 35.679697] print_report+0xcc/0x620 [ 35.680179] ? __virt_addr_valid+0x102/0x340 [ 35.680734] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.681346] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.681973] kasan_report+0xbe/0xf0 [ 35.682451] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.683091] vma_interval_tree_remove+0xc75/0xec0 [ 35.683720] vma_prepare+0xc54/0x11a0 [ 35.684216] __split_vma+0x5af/0x950 [ 35.684701] ? __pfx___split_vma+0x10/0x10 [ 35.685257] ? find_held_lock+0x2c/0x110 [ 35.685807] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.686412] ? lock_is_held_type+0x9f/0x120 [ 35.686976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.687612] ? mtree_range_walk+0x632/0x900 [ 35.688188] ? mas_walk+0x5c7/0x7c0 [ 35.688687] do_vmi_munmap+0x1f1/0x2b0 [ 35.689202] mmap_region+0x1f9/0x2660 [ 35.689705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.690249] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.690996] ? __pfx_lock_acquire+0x10/0x10 [ 35.691556] ? __pfx_mmap_region+0x10/0x10 [ 35.692107] ? security_mmap_addr+0x7d/0xa0 [ 35.692672] ? get_unmapped_area+0x1f5/0x3f0 [ 35.693249] do_mmap+0x854/0xf00 [ 35.693708] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.694240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.694827] ksys_mmap_pgoff+0x3af/0x500 [ 35.695362] do_syscall_64+0x3f/0x90 [ 35.695859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.696540] RIP: 0033:0x7f9e25792d82 [ 35.697022] 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 [ 35.699276] RSP: 002b:00007ffc2f28f8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.700224] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e25792d82 [ 35.701120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e24bcc000 [ 35.702005] RBP: 00007f9e24bcc000 R08: 0000000000000009 R09: 0000000000001000 [ 35.702893] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f053aedec0 [ 35.703783] R13: 00007ffc2f28f8e0 R14: 00007ffc2f28f910 R15: 00007ffc2f28fc70 [ 35.704694] [ 35.705001] [ 35.705222] Allocated by task 213: [ 35.705675] kasan_save_stack+0x22/0x50 [ 35.706206] kasan_set_track+0x25/0x30 [ 35.706715] __kasan_slab_alloc+0x59/0x70 [ 35.707264] kmem_cache_alloc+0x16b/0x370 [ 35.707798] vm_area_dup+0x20/0x160 [ 35.708269] __split_vma+0x170/0x950 [ 35.708753] split_vma+0xc6/0x110 [ 35.709212] mprotect_fixup+0x8d2/0xb30 [ 35.709739] do_mprotect_pkey+0x87e/0xd40 [ 35.710296] __x64_sys_mprotect+0x78/0xc0 [ 35.710837] do_syscall_64+0x3f/0x90 [ 35.711328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.712001] [ 35.712228] Freed by task 213: [ 35.712633] kasan_save_stack+0x22/0x50 [ 35.713163] kasan_set_track+0x25/0x30 [ 35.713677] kasan_save_free_info+0x2b/0x50 [ 35.714234] __kasan_slab_free+0x10a/0x190 [ 35.714793] kmem_cache_free+0x10d/0x4d0 [ 35.715318] rcu_core+0x8c8/0x2860 [ 35.715783] __do_softirq+0x1b7/0x7d4 [ 35.716285] [ 35.716508] Last potentially related work creation: [ 35.717122] kasan_save_stack+0x22/0x50 [ 35.717645] __kasan_record_aux_stack+0x8e/0xa0 [ 35.718261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.718935] remove_vma+0x139/0x170 [ 35.719404] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.719992] do_vmi_munmap+0x1f1/0x2b0 [ 35.720495] __vm_munmap+0x138/0x3a0 [ 35.720983] __x64_sys_munmap+0x59/0x80 [ 35.721503] do_syscall_64+0x3f/0x90 [ 35.722004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.722670] [ 35.722892] The buggy address belongs to the object at ffff88801a21c910 [ 35.722892] which belongs to the cache vm_area_struct of size 168 [ 35.724430] The buggy address is located 88 bytes inside of [ 35.724430] freed 168-byte region [ffff88801a21c910, ffff88801a21c9b8) [ 35.725894] [ 35.726142] The buggy address belongs to the physical page: [ 35.726839] page:00000000e9a23c38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a21c [ 35.727996] memcg:ffff888018358601 [ 35.728441] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.729112] page_type: 0xffffffff() [ 35.729573] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.730553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018358601 [ 35.731503] page dumped because: kasan: bad access detected [ 35.732199] [ 35.732426] Memory state around the buggy address: [ 35.733038] ffff88801a21c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.733967] ffff88801a21c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.734873] >ffff88801a21c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.735768] ^ [ 35.736584] ffff88801a21c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.737484] ffff88801a21ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.738383] ================================================================== [ 35.739404] Disabling lock debugging due to kernel taint [ 37.830488] BUG: Bad rss-counter state mm:000000002ef8b510 type:MM_FILEPAGES val:33 [ 37.831514] BUG: Bad rss-counter state mm:000000002ef8b510 type:MM_ANONPAGES val:22 [ 38.278780] BUG: Bad rss-counter state mm:000000008f5ea12d type:MM_FILEPAGES val:33 [ 38.279781] BUG: Bad rss-counter state mm:000000008f5ea12d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58958' (ECDSA) to the list of known hosts. 2023/06/19 22:33:58 fuzzer started 2023/06/19 22:33:58 dialing manager at localhost:44161 2023/06/19 22:33:58 checking machine... 2023/06/19 22:33:58 checking revisions... [ 39.012322] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:33:58 testing simple program... [ 39.051600] cgroup: Unknown subsys name 'net' [ 39.107071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:33:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613fb48 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff8613fb4a RBP=ffff88800696f250 RSP=ffff88800696f188 R8 =0000000000000001 R9 =ffff88800696f238 R10=0000000000038001 R11=00000000000223ea R12=ffff88800696f258 R13=ffff88800696f240 R14=ffff88800696fe88 R15=ffff88800696f1f8 RIP=ffffffff81131204 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 00007ffab78c3900 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=00007fb36dc89650 CR3=000000000da66000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fd2829a30308d60100000000000ae988 XMM05=a2de7f4383e02fb70000000000135030 XMM06=19e9129bd510f2350000000000133ee8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffc42c1dfb8 CR3=000000000c47e000 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=2038353a33333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000