syzkaller login: [ 54.814792] BUG: Bad rss-counter state mm:000000003e35846b type:MM_FILEPAGES val:33 [ 54.815838] BUG: Bad rss-counter state mm:000000003e35846b type:MM_ANONPAGES val:22 [ 54.863176] ================================================================== [ 54.864466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.865700] Read of size 8 at addr ffff88800e595d08 by task sshd/226 [ 54.866828] [ 54.867121] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.868265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.869503] Call Trace: [ 54.869852] [ 54.870148] dump_stack_lvl+0x91/0xf0 [ 54.870637] print_report+0xcc/0x620 [ 54.871130] ? __virt_addr_valid+0x102/0x340 [ 54.871684] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.872315] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.872929] kasan_report+0xbe/0xf0 [ 54.873420] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.874083] vma_interval_tree_remove+0xc75/0xec0 [ 54.874690] vma_prepare+0xc54/0x11a0 [ 54.875187] __split_vma+0x5af/0x950 [ 54.875660] ? __pfx___split_vma+0x10/0x10 [ 54.876211] ? find_held_lock+0x2c/0x110 [ 54.876731] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.877299] ? lock_is_held_type+0x9f/0x120 [ 54.877864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.878487] ? mtree_range_walk+0x632/0x900 [ 54.879069] ? mas_walk+0x5c7/0x7c0 [ 54.879548] do_vmi_munmap+0x1f1/0x2b0 [ 54.880054] mmap_region+0x1f9/0x2660 [ 54.880539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.881061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.881780] ? __pfx_lock_acquire+0x10/0x10 [ 54.882320] ? __pfx_mmap_region+0x10/0x10 [ 54.882852] ? security_mmap_addr+0x7d/0xa0 [ 54.883392] ? get_unmapped_area+0x1f5/0x3f0 [ 54.883941] do_mmap+0x854/0xf00 [ 54.884404] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.884901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.885469] ksys_mmap_pgoff+0x3af/0x500 [ 54.886006] do_syscall_64+0x3f/0x90 [ 54.886483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.887148] RIP: 0033:0x7f7f35750d82 [ 54.887600] 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 [ 54.889781] RSP: 002b:00007fffb4722018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.890710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f35750d82 [ 54.891557] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f34b8a000 [ 54.892406] RBP: 00007f7f34b8a000 R08: 0000000000000009 R09: 0000000000001000 [ 54.893271] R10: 0000000000000812 R11: 0000000000000206 R12: 000055735e1baec0 [ 54.894170] R13: 00007fffb4722030 R14: 00007fffb4722060 R15: 00007fffb47223c0 [ 54.895056] [ 54.895350] [ 54.895561] Allocated by task 219: [ 54.896019] kasan_save_stack+0x22/0x50 [ 54.896518] kasan_set_track+0x25/0x30 [ 54.897027] __kasan_slab_alloc+0x59/0x70 [ 54.897556] kmem_cache_alloc+0x16b/0x370 [ 54.898110] vm_area_dup+0x20/0x160 [ 54.898572] __split_vma+0x170/0x950 [ 54.899069] split_vma+0xc6/0x110 [ 54.899509] mprotect_fixup+0x8d2/0xb30 [ 54.900018] do_mprotect_pkey+0x87e/0xd40 [ 54.900542] __x64_sys_mprotect+0x78/0xc0 [ 54.901074] do_syscall_64+0x3f/0x90 [ 54.901550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.902210] [ 54.902423] Freed by task 219: [ 54.902813] kasan_save_stack+0x22/0x50 [ 54.903328] kasan_set_track+0x25/0x30 [ 54.903818] kasan_save_free_info+0x2b/0x50 [ 54.904533] __kasan_slab_free+0x10a/0x190 [ 54.905080] kmem_cache_free+0x10d/0x4d0 [ 54.905588] rcu_core+0x8c8/0x2860 [ 54.906071] __do_softirq+0x1b7/0x7d4 [ 54.906552] [ 54.906766] Last potentially related work creation: [ 54.907367] kasan_save_stack+0x22/0x50 [ 54.907866] __kasan_record_aux_stack+0x8e/0xa0 [ 54.908450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.909115] remove_vma+0x139/0x170 [ 54.909572] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.910145] do_vmi_munmap+0x1f1/0x2b0 [ 54.910638] __vm_munmap+0x138/0x3a0 [ 54.911123] __x64_sys_munmap+0x59/0x80 [ 54.911625] do_syscall_64+0x3f/0x90 [ 54.912114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.912750] [ 54.912976] The buggy address belongs to the object at ffff88800e595cb0 [ 54.912976] which belongs to the cache vm_area_struct of size 168 [ 54.914488] The buggy address is located 88 bytes inside of [ 54.914488] freed 168-byte region [ffff88800e595cb0, ffff88800e595d58) [ 54.915903] [ 54.916133] The buggy address belongs to the physical page: [ 54.916795] page:00000000fbeec3dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe595 [ 54.917916] memcg:ffff88800e335001 [ 54.918351] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.919010] page_type: 0xffffffff() [ 54.919476] raw: 0100000000000200 ffff88800879fc80 ffffea00003ad4c0 dead000000000004 [ 54.920410] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e335001 [ 54.921329] page dumped because: kasan: bad access detected [ 54.922014] [ 54.922231] Memory state around the buggy address: [ 54.922819] ffff88800e595c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 54.923688] ffff88800e595c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 54.924572] >ffff88800e595d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 54.925452] ^ [ 54.925918] ffff88800e595d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 54.926786] ffff88800e595e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 54.927640] ================================================================== [ 54.928689] Disabling lock debugging due to kernel taint [ 57.728225] BUG: Bad rss-counter state mm:00000000408664ef type:MM_FILEPAGES val:33 [ 57.729245] BUG: Bad rss-counter state mm:00000000408664ef type:MM_ANONPAGES val:22 [ 58.078222] BUG: Bad rss-counter state mm:000000004817685d type:MM_FILEPAGES val:33 [ 58.079230] BUG: Bad rss-counter state mm:000000004817685d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42938' (ECDSA) to the list of known hosts. 2023/06/20 00:11:13 fuzzer started 2023/06/20 00:11:14 dialing manager at localhost:44161 2023/06/20 00:11:14 checking machine... 2023/06/20 00:11:14 checking revisions... [ 58.867613] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:11:14 testing simple program... [ 58.918291] cgroup: Unknown subsys name 'net' [ 58.985132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:10:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f29212e2a98 CR3=00000000167c6000 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=2033313a31313a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a31313a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000003ad0ea9e RBX=00000000e6a84d39 RCX=ffff88800f03f1a0 RDX=000000000000000f RSI=0000000000000018 RDI=0000000071acea6d RBP=ffff8880084c6140 RSP=ffff88800f03f120 R8 =00000000363c4f0a R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000002800 R14=ffff88800f03f188 R15=000000000000000f RIP=ffffffff82270eb2 RFL=00000297 [--S-APC] 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 00007f92b8054900 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=000055c4b32cd9b8 CR3=000000000e0ce000 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=00000000000000000000000000000000 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