syzkaller login: [ 78.711668] BUG: Bad rss-counter state mm:00000000f906d28c type:MM_FILEPAGES val:33 [ 78.712686] BUG: Bad rss-counter state mm:00000000f906d28c type:MM_ANONPAGES val:22 [ 78.935776] ================================================================== [ 78.936635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.937530] Read of size 8 at addr ffff888010166c20 by task sshd/231 [ 78.938239] [ 78.938450] CPU: 0 PID: 231 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 78.939397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.940300] Call Trace: [ 78.940603] [ 78.940869] dump_stack_lvl+0x91/0xf0 [ 78.941358] print_report+0xcc/0x620 [ 78.941813] ? __virt_addr_valid+0x102/0x340 [ 78.942334] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.942924] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.943500] kasan_report+0xbe/0xf0 [ 78.943945] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.944527] vma_interval_tree_remove+0xc75/0xec0 [ 78.945090] vma_prepare+0xc54/0x11a0 [ 78.945538] __split_vma+0x5af/0x950 [ 78.945985] ? __pfx___split_vma+0x10/0x10 [ 78.946483] ? find_held_lock+0x2c/0x110 [ 78.946978] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.947509] ? lock_is_held_type+0x9f/0x120 [ 78.948013] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.948579] ? mtree_range_walk+0x632/0x900 [ 78.949099] ? mas_walk+0x5c7/0x7c0 [ 78.949548] do_vmi_munmap+0x1f1/0x2b0 [ 78.950009] mmap_region+0x1f9/0x2660 [ 78.950465] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.950960] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.951631] ? __pfx_lock_acquire+0x10/0x10 [ 78.952134] ? __pfx_mmap_region+0x10/0x10 [ 78.952630] ? security_mmap_addr+0x7d/0xa0 [ 78.953129] ? get_unmapped_area+0x1f5/0x3f0 [ 78.953644] do_mmap+0x854/0xf00 [ 78.954061] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.954525] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.955068] ksys_mmap_pgoff+0x3af/0x500 [ 78.955545] do_syscall_64+0x3f/0x90 [ 78.955994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.956597] RIP: 0033:0x7f94700f7d82 [ 78.957022] 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 [ 78.959006] RSP: 002b:00007ffcdd613c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.959858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94700f7d82 [ 78.960648] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f946f531000 [ 78.961439] RBP: 00007f946f531000 R08: 0000000000000009 R09: 0000000000001000 [ 78.962229] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556daa239f60 [ 78.963033] R13: 00007ffcdd613c80 R14: 00007ffcdd613cb0 R15: 00007ffcdd614010 [ 78.963838] [ 78.964113] [ 78.964317] Allocated by task 221: [ 78.964721] kasan_save_stack+0x22/0x50 [ 78.965193] kasan_set_track+0x25/0x30 [ 78.965658] __kasan_slab_alloc+0x59/0x70 [ 78.966155] kmem_cache_alloc+0x16b/0x370 [ 78.966640] vm_area_dup+0x20/0x160 [ 78.967077] __split_vma+0x170/0x950 [ 78.967518] split_vma+0xc6/0x110 [ 78.967932] mprotect_fixup+0x8d2/0xb30 [ 78.968408] do_mprotect_pkey+0x87e/0xd40 [ 78.968901] __x64_sys_mprotect+0x78/0xc0 [ 78.969395] do_syscall_64+0x3f/0x90 [ 78.969838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.970447] [ 78.970652] Freed by task 221: [ 78.971043] kasan_save_stack+0x22/0x50 [ 78.971514] kasan_set_track+0x25/0x30 [ 78.971977] kasan_save_free_info+0x2b/0x50 [ 78.972482] __kasan_slab_free+0x10a/0x190 [ 78.972982] kmem_cache_free+0x10d/0x4d0 [ 78.973463] rcu_core+0x8c8/0x2860 [ 78.973885] __do_softirq+0x1b7/0x7d4 [ 78.974335] [ 78.974539] Last potentially related work creation: [ 78.975094] kasan_save_stack+0x22/0x50 [ 78.975569] __kasan_record_aux_stack+0x8e/0xa0 [ 78.976111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.976714] remove_vma+0x139/0x170 [ 78.977141] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.977688] do_vmi_munmap+0x1f1/0x2b0 [ 78.978167] __vm_munmap+0x138/0x3a0 [ 78.978631] __x64_sys_munmap+0x59/0x80 [ 78.979141] do_syscall_64+0x3f/0x90 [ 78.979613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.980250] [ 78.980459] The buggy address belongs to the object at ffff888010166bc8 [ 78.980459] which belongs to the cache vm_area_struct of size 168 [ 78.981923] The buggy address is located 88 bytes inside of [ 78.981923] freed 168-byte region [ffff888010166bc8, ffff888010166c70) [ 78.983323] [ 78.983532] The buggy address belongs to the physical page: [ 78.984186] page:00000000dfe8a789 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10166 [ 78.985271] memcg:ffff8880165f4001 [ 78.985687] flags: 0x100000000000200(slab|node=0|zone=1) [ 78.986342] page_type: 0xffffffff() [ 78.986789] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 78.987706] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165f4001 [ 78.988605] page dumped because: kasan: bad access detected [ 78.989269] [ 78.989475] Memory state around the buggy address: [ 78.990042] ffff888010166b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 78.990893] ffff888010166b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 78.991748] >ffff888010166c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 78.992586] ^ [ 78.993114] ffff888010166c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 78.993956] ffff888010166d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 78.994822] ================================================================== [ 78.995843] Disabling lock debugging due to kernel taint [ 80.931537] BUG: Bad rss-counter state mm:00000000b1b5944a type:MM_FILEPAGES val:33 [ 80.932545] BUG: Bad rss-counter state mm:00000000b1b5944a type:MM_ANONPAGES val:22 [ 81.386211] BUG: Bad rss-counter state mm:00000000d05aaccf type:MM_FILEPAGES val:33 [ 81.387278] BUG: Bad rss-counter state mm:00000000d05aaccf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26795' (ECDSA) to the list of known hosts. 2023/06/20 03:18:18 fuzzer started 2023/06/20 03:18:18 dialing manager at localhost:44161 2023/06/20 03:18:18 checking machine... 2023/06/20 03:18:18 checking revisions... [ 82.092620] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:18:18 testing simple program... [ 82.124192] cgroup: Unknown subsys name 'net' [ 82.170454] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:18:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000024 RCX=0000000000000000 RDX=ffff88800e5a51c0 RSI=0000000000000024 RDI=ffff88800f5b7600 RBP=00007ffd68da7290 RSP=ffff88800e4a78f8 R8 =0000000000000006 R9 =00007ffd68da7290 R10=00007ffd68da72b4 R11=0000000000000000 R12=ffff88800f5b7600 R13=00007ffd68da72b4 R14=0000000000000000 R15=ffff88800e4a7d90 RIP=ffffffff8180fd20 RFL=00000293 [--S-A-C] 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 00007f9295b12900 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=00007ffd68da6000 CR3=000000000ea28000 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=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=00007fbeebe52230 CR3=000000000c77a000 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=603271aee30ac1a5a249b959029fc81e XMM02=000000000011db98ec2efd57dc4c00df XMM03=0000000000124d88274babef66820394 XMM04=12ff8f1a4d03ac0600000000000ae988 XMM05=0b39c798a71319b60000000000134f70 XMM06=eccb6b6ffe7b71580000000000134148 XMM07=e042d86d42eb936e0000000000125008 XMM08=274babef66820394000000000011dbf8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000