syzkaller login: [ 23.777448] BUG: Bad rss-counter state mm:0000000047da7517 type:MM_FILEPAGES val:33 [ 23.778612] BUG: Bad rss-counter state mm:0000000047da7517 type:MM_ANONPAGES val:22 [ 23.936386] ================================================================== [ 23.937285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.938213] Read of size 8 at addr ffff8880182fe968 by task sshd/221 [ 23.938971] [ 23.939186] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.940172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.941131] Call Trace: [ 23.941452] [ 23.941783] dump_stack_lvl+0x91/0xf0 [ 23.942271] print_report+0xcc/0x620 [ 23.942746] ? __virt_addr_valid+0x102/0x340 [ 23.943292] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.943901] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.944511] kasan_report+0xbe/0xf0 [ 23.944975] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.945597] vma_interval_tree_remove+0xc75/0xec0 [ 23.946194] vma_prepare+0xc54/0x11a0 [ 23.946662] __split_vma+0x5af/0x950 [ 23.947123] ? __pfx___split_vma+0x10/0x10 [ 23.947639] ? find_held_lock+0x2c/0x110 [ 23.948158] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.948710] ? lock_is_held_type+0x9f/0x120 [ 23.949241] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.949845] ? mtree_range_walk+0x632/0x900 [ 23.950393] ? mas_walk+0x5c7/0x7c0 [ 23.950861] do_vmi_munmap+0x1f1/0x2b0 [ 23.951344] mmap_region+0x1f9/0x2660 [ 23.951815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.952320] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.953022] ? __pfx_lock_acquire+0x10/0x10 [ 23.953604] ? __pfx_mmap_region+0x10/0x10 [ 23.954127] ? security_mmap_addr+0x7d/0xa0 [ 23.954646] ? get_unmapped_area+0x1f5/0x3f0 [ 23.955188] do_mmap+0x854/0xf00 [ 23.955623] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.956105] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.956657] ksys_mmap_pgoff+0x3af/0x500 [ 23.957154] do_syscall_64+0x3f/0x90 [ 23.957638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.958281] RIP: 0033:0x7f91cd544d82 [ 23.958735] 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 [ 23.960840] RSP: 002b:00007fffb2af1138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.961742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91cd544d82 [ 23.962574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91cc97e000 [ 23.963410] RBP: 00007f91cc97e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.964242] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0bed74f60 [ 23.965082] R13: 00007fffb2af1150 R14: 00007fffb2af1180 R15: 00007fffb2af14e0 [ 23.965937] [ 23.966228] [ 23.966439] Allocated by task 214: [ 23.966866] kasan_save_stack+0x22/0x50 [ 23.967365] kasan_set_track+0x25/0x30 [ 23.967855] __kasan_slab_alloc+0x59/0x70 [ 23.968365] kmem_cache_alloc+0x16b/0x370 [ 23.968875] vm_area_dup+0x20/0x160 [ 23.969322] __split_vma+0x170/0x950 [ 23.969794] split_vma+0xc6/0x110 [ 23.970230] mprotect_fixup+0x8d2/0xb30 [ 23.970721] do_mprotect_pkey+0x87e/0xd40 [ 23.971239] __x64_sys_mprotect+0x78/0xc0 [ 23.971758] do_syscall_64+0x3f/0x90 [ 23.972229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.972856] [ 23.973070] Freed by task 214: [ 23.973457] kasan_save_stack+0x22/0x50 [ 23.973973] kasan_set_track+0x25/0x30 [ 23.974462] kasan_save_free_info+0x2b/0x50 [ 23.974990] __kasan_slab_free+0x10a/0x190 [ 23.975517] kmem_cache_free+0x10d/0x4d0 [ 23.976019] rcu_core+0x8c8/0x2860 [ 23.976456] __do_softirq+0x1b7/0x7d4 [ 23.976925] [ 23.977139] Last potentially related work creation: [ 23.977719] kasan_save_stack+0x22/0x50 [ 23.978218] __kasan_record_aux_stack+0x8e/0xa0 [ 23.978780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.979417] remove_vma+0x139/0x170 [ 23.979859] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.980411] do_vmi_munmap+0x1f1/0x2b0 [ 23.980893] __vm_munmap+0x138/0x3a0 [ 23.981356] __x64_sys_munmap+0x59/0x80 [ 23.981849] do_syscall_64+0x3f/0x90 [ 23.982316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.982953] [ 23.983167] The buggy address belongs to the object at ffff8880182fe910 [ 23.983167] which belongs to the cache vm_area_struct of size 168 [ 23.984620] The buggy address is located 88 bytes inside of [ 23.984620] freed 168-byte region [ffff8880182fe910, ffff8880182fe9b8) [ 23.986021] [ 23.986235] The buggy address belongs to the physical page: [ 23.986878] page:00000000f0aae565 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182fe [ 23.987963] memcg:ffff888019117801 [ 23.988386] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.989073] page_type: 0xffffffff() [ 23.989522] raw: 0100000000000200 ffff8880087a0c80 ffffea000060bdc0 000000000000000d [ 23.990438] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019117801 [ 23.991340] page dumped because: kasan: bad access detected [ 23.991992] [ 23.992209] Memory state around the buggy address: [ 23.992783] ffff8880182fe800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.993629] ffff8880182fe880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.994471] >ffff8880182fe900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.995309] ^ [ 23.996074] ffff8880182fe980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.996921] ffff8880182fea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.997773] ================================================================== [ 23.998726] Disabling lock debugging due to kernel taint [ 25.913469] BUG: Bad rss-counter state mm:000000007362afce type:MM_FILEPAGES val:33 [ 25.914491] BUG: Bad rss-counter state mm:000000007362afce type:MM_ANONPAGES val:22 [ 26.364342] BUG: Bad rss-counter state mm:000000007db79ebc type:MM_FILEPAGES val:33 [ 26.365327] BUG: Bad rss-counter state mm:000000007db79ebc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3845' (ECDSA) to the list of known hosts. 2023/06/21 02:11:06 fuzzer started 2023/06/21 02:11:06 dialing manager at localhost:36067 2023/06/21 02:11:06 checking machine... 2023/06/21 02:11:06 checking revisions... [ 27.096764] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:11:06 testing simple program... [ 27.151603] cgroup: Unknown subsys name 'net' [ 27.202327] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:05 Registers: info registers vcpu 0 RAX=ffff88806ce3ce60 RBX=ffff88800c4f2f00 RCX=ffff88800c4f2f00 RDX=ffff88800c4f2f00 RSI=ffffea0000313c80 RDI=ffff888008441500 RBP=ffff88800faf7a28 RSP=ffff88800faf7990 R8 =0000000000000001 R9 =ffffffff8181032f R10=ffffea0000313c80 R11=0000000000070006 R12=ffffea0000313c80 R13=ffff88800faf7a78 R14=ffff888008441500 R15=ffff88800c4f2f00 RIP=ffffffff81809608 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 00007f1f06e00900 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=00007fffa1d26000 CR3=00000000190ee000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1ebd213b40 CR3=0000000015ab6000 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=31313a3230203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303532 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000