syzkaller login: [ 38.734326] BUG: Bad rss-counter state mm:00000000bfbacdfd type:MM_FILEPAGES val:33 [ 38.735355] BUG: Bad rss-counter state mm:00000000bfbacdfd type:MM_ANONPAGES val:22 [ 38.899433] ================================================================== [ 38.900332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.901283] Read of size 8 at addr ffff888014299df0 by task sshd/218 [ 38.902049] [ 38.902264] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.903333] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.904301] Call Trace: [ 38.904622] <TASK> [ 38.904904] dump_stack_lvl+0x91/0xf0 [ 38.905440] print_report+0xcc/0x620 [ 38.905927] ? __virt_addr_valid+0x102/0x340 [ 38.906478] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907096] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907716] kasan_report+0xbe/0xf0 [ 38.908190] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.908819] vma_interval_tree_remove+0xc75/0xec0 [ 38.909445] vma_prepare+0xc54/0x11a0 [ 38.909937] __split_vma+0x5af/0x950 [ 38.910409] ? __pfx___split_vma+0x10/0x10 [ 38.910941] ? find_held_lock+0x2c/0x110 [ 38.911462] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.912036] ? lock_is_held_type+0x9f/0x120 [ 38.912570] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.913177] ? mtree_range_walk+0x632/0x900 [ 38.913721] ? mas_walk+0x5c7/0x7c0 [ 38.914197] do_vmi_munmap+0x1f1/0x2b0 [ 38.914682] mmap_region+0x1f9/0x2660 [ 38.915172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.915683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.916388] ? __pfx_lock_acquire+0x10/0x10 [ 38.916938] ? __pfx_mmap_region+0x10/0x10 [ 38.917493] ? security_mmap_addr+0x7d/0xa0 [ 38.918030] ? get_unmapped_area+0x1f5/0x3f0 [ 38.918578] do_mmap+0x854/0xf00 [ 38.919022] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.919514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.920077] ksys_mmap_pgoff+0x3af/0x500 [ 38.920590] do_syscall_64+0x3f/0x90 [ 38.921081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921743] RIP: 0033:0x7f69c5ce8d82 [ 38.922209] 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 [ 38.924363] RSP: 002b:00007ffd345257e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.925282] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69c5ce8d82 [ 38.926139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69c5122000 [ 38.927010] RBP: 00007f69c5122000 R08: 0000000000000009 R09: 0000000000001000 [ 38.927866] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c477444980 [ 38.928727] R13: 00007ffd34525800 R14: 00007ffd34525830 R15: 00007ffd34525b90 [ 38.929613] </TASK> [ 38.929902] [ 38.930125] Allocated by task 211: [ 38.930561] kasan_save_stack+0x22/0x50 [ 38.931079] kasan_set_track+0x25/0x30 [ 38.931580] __kasan_slab_alloc+0x59/0x70 [ 38.932112] kmem_cache_alloc+0x16b/0x370 [ 38.932628] vm_area_dup+0x20/0x160 [ 38.933093] __split_vma+0x170/0x950 [ 38.933560] split_vma+0xc6/0x110 [ 38.934003] mprotect_fixup+0x8d2/0xb30 [ 38.934511] do_mprotect_pkey+0x87e/0xd40 [ 38.935033] __x64_sys_mprotect+0x78/0xc0 [ 38.935553] do_syscall_64+0x3f/0x90 [ 38.936026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936669] [ 38.936889] Freed by task 13: [ 38.937293] kasan_save_stack+0x22/0x50 [ 38.937800] kasan_set_track+0x25/0x30 [ 38.938303] kasan_save_free_info+0x2b/0x50 [ 38.938843] __kasan_slab_free+0x10a/0x190 [ 38.939378] kmem_cache_free+0x10d/0x4d0 [ 38.939891] rcu_core+0x8c8/0x2860 [ 38.940340] __do_softirq+0x1b7/0x7d4 [ 38.940832] [ 38.941052] Last potentially related work creation: [ 38.941651] kasan_save_stack+0x22/0x50 [ 38.942159] __kasan_record_aux_stack+0x8e/0xa0 [ 38.942737] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.943377] remove_vma+0x139/0x170 [ 38.943837] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.944466] do_vmi_munmap+0x1f1/0x2b0 [ 38.944957] __vm_munmap+0x138/0x3a0 [ 38.945441] __x64_sys_munmap+0x59/0x80 [ 38.945946] do_syscall_64+0x3f/0x90 [ 38.946422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.947070] [ 38.947293] Second to last potentially related work creation: [ 38.947974] kasan_save_stack+0x22/0x50 [ 38.948478] __kasan_record_aux_stack+0x8e/0xa0 [ 38.949061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.949699] remove_vma+0x139/0x170 [ 38.950159] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.950715] do_vmi_munmap+0x1f1/0x2b0 [ 38.951220] mmap_region+0x1f9/0x2660 [ 38.951697] do_mmap+0x854/0xf00 [ 38.952136] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.952622] ksys_mmap_pgoff+0x3af/0x500 [ 38.953142] do_syscall_64+0x3f/0x90 [ 38.953619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954264] [ 38.954482] The buggy address belongs to the object at ffff888014299d98 [ 38.954482] which belongs to the cache vm_area_struct of size 168 [ 38.955974] The buggy address is located 88 bytes inside of [ 38.955974] freed 168-byte region [ffff888014299d98, ffff888014299e40) [ 38.957393] [ 38.957606] The buggy address belongs to the physical page: [ 38.958266] page:000000003ab92908 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14299 [ 38.959368] memcg:ffff888015963f01 [ 38.959802] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.960452] page_type: 0xffffffff() [ 38.960907] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a8e40 dead000000000004 [ 38.961844] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015963f01 [ 38.962762] page dumped because: kasan: bad access detected [ 38.963433] [ 38.963647] Memory state around the buggy address: [ 38.964226] ffff888014299c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.965088] ffff888014299d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.965947] >ffff888014299d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.966805] ^ [ 38.967622] ffff888014299e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.968475] ffff888014299e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.969351] ================================================================== [ 38.970377] Disabling lock debugging due to kernel taint [ 40.876749] BUG: Bad rss-counter state mm:000000009c51b469 type:MM_FILEPAGES val:33 [ 40.878178] BUG: Bad rss-counter state mm:000000009c51b469 type:MM_ANONPAGES val:22 [ 41.441694] BUG: Bad rss-counter state mm:000000008e113fad type:MM_FILEPAGES val:33 [ 41.442860] BUG: Bad rss-counter state mm:000000008e113fad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57253' (ECDSA) to the list of known hosts. 2023/06/21 07:21:20 fuzzer started 2023/06/21 07:21:20 dialing manager at localhost:36067 2023/06/21 07:21:20 checking machine... 2023/06/21 07:21:20 checking revisions... [ 42.001716] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:21:20 testing simple program... [ 42.042898] cgroup: Unknown subsys name 'net' [ 42.124319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:21:20 Registers: info registers vcpu 0 RAX=ffffea000071db08 RBX=dffffc0000000000 RCX=ffffffff81b33806 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffea000071db00 RBP=ffffea000071db00 RSP=ffff8880090bf238 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000690 R11=0000000000000000 R12=ffff8880090bf638 R13=0000000000000e90 R14=ffffea000071db28 R15=0000000000000690 RIP=ffffffff8180f03b RFL=00000282 [--S----] 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=00007f4e2b084710 CR3=0000000016a0e000 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=2030323a31323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a31323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001df4e1d RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800f161b40 RSI=00007f185b3443ec RDI=00007f185b340000 RBP=00007f185b3443ec RSP=ffff888006aa7de0 R8 =0000000000000004 R9 =0000000000000051 R10=000000000000013d R11=0000000000000000 R12=ffff88800efa70e8 R13=00007f185b340000 R14=0000000000000051 R15=ffff88800efa7118 RIP=ffffffff814c0370 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f185ad8b900 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=00007f185b3443ec CR3=000000001a37e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000