syzkaller login: [ 28.757825] BUG: Bad rss-counter state mm:000000003cce2020 type:MM_FILEPAGES val:33 [ 28.759905] BUG: Bad rss-counter state mm:000000003cce2020 type:MM_ANONPAGES val:22 [ 28.926737] ================================================================== [ 28.927413] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.928115] Read of size 8 at addr ffff88800c5cad08 by task sshd/222 [ 28.928701] [ 28.928862] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.929519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.930246] Call Trace: [ 28.930558] [ 28.930804] dump_stack_lvl+0x91/0xf0 [ 28.931194] print_report+0xcc/0x620 [ 28.931563] ? __virt_addr_valid+0x102/0x340 [ 28.931970] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.932435] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.932914] kasan_report+0xbe/0xf0 [ 28.933264] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.933729] vma_interval_tree_remove+0xc75/0xec0 [ 28.934183] vma_prepare+0xc54/0x11a0 [ 28.934540] __split_vma+0x5af/0x950 [ 28.934898] ? __pfx___split_vma+0x10/0x10 [ 28.935298] ? find_held_lock+0x2c/0x110 [ 28.935691] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.936140] ? lock_is_held_type+0x9f/0x120 [ 28.936518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.936888] ? mtree_range_walk+0x632/0x900 [ 28.937224] ? mas_walk+0x5c7/0x7c0 [ 28.937516] do_vmi_munmap+0x1f1/0x2b0 [ 28.937819] mmap_region+0x1f9/0x2660 [ 28.938113] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.938425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.938857] ? __pfx_lock_acquire+0x10/0x10 [ 28.939184] ? __pfx_mmap_region+0x10/0x10 [ 28.939527] ? security_mmap_addr+0x7d/0xa0 [ 28.939860] ? get_unmapped_area+0x1f5/0x3f0 [ 28.940208] do_mmap+0x854/0xf00 [ 28.940486] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.940805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.941165] ksys_mmap_pgoff+0x3af/0x500 [ 28.941492] do_syscall_64+0x3f/0x90 [ 28.941799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.942202] RIP: 0033:0x7fdc14615d82 [ 28.942490] 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 [ 28.943829] RSP: 002b:00007ffef9e74598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.944411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc14615d82 [ 28.944933] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc13a4f000 [ 28.945450] RBP: 00007fdc13a4f000 R08: 0000000000000009 R09: 0000000000001000 [ 28.945964] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8b0ecdec0 [ 28.946477] R13: 00007ffef9e745b0 R14: 00007ffef9e745e0 R15: 00007ffef9e74940 [ 28.947000] [ 28.947178] [ 28.947310] Allocated by task 213: [ 28.947713] kasan_save_stack+0x22/0x50 [ 28.948031] kasan_set_track+0x25/0x30 [ 28.948352] __kasan_slab_alloc+0x59/0x70 [ 28.948685] kmem_cache_alloc+0x16b/0x370 [ 28.949019] vm_area_dup+0x20/0x160 [ 28.949302] __split_vma+0x170/0x950 [ 28.949595] split_vma+0xc6/0x110 [ 28.949868] mprotect_fixup+0x8d2/0xb30 [ 28.950181] do_mprotect_pkey+0x87e/0xd40 [ 28.950507] __x64_sys_mprotect+0x78/0xc0 [ 28.950839] do_syscall_64+0x3f/0x90 [ 28.951137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951541] [ 28.951794] Freed by task 213: [ 28.952041] kasan_save_stack+0x22/0x50 [ 28.952363] kasan_set_track+0x25/0x30 [ 28.952674] kasan_save_free_info+0x2b/0x50 [ 28.953005] __kasan_slab_free+0x10a/0x190 [ 28.953340] kmem_cache_free+0x10d/0x4d0 [ 28.953656] rcu_core+0x8c8/0x2860 [ 28.953941] __do_softirq+0x1b7/0x7d4 [ 28.954241] [ 28.954378] Last potentially related work creation: [ 28.954747] kasan_save_stack+0x22/0x50 [ 28.955064] __kasan_record_aux_stack+0x8e/0xa0 [ 28.955428] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.955835] remove_vma+0x139/0x170 [ 28.956132] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.956485] do_vmi_munmap+0x1f1/0x2b0 [ 28.956788] __vm_munmap+0x138/0x3a0 [ 28.957085] __x64_sys_munmap+0x59/0x80 [ 28.957397] do_syscall_64+0x3f/0x90 [ 28.957695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.958104] [ 28.958241] The buggy address belongs to the object at ffff88800c5cacb0 [ 28.958241] which belongs to the cache vm_area_struct of size 168 [ 28.959163] The buggy address is located 88 bytes inside of [ 28.959163] freed 168-byte region [ffff88800c5cacb0, ffff88800c5cad58) [ 28.960049] [ 28.960191] The buggy address belongs to the physical page: [ 28.960606] page:000000008e163c1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5ca [ 28.961288] memcg:ffff88800d691a01 [ 28.961561] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.961998] page_type: 0xffffffff() [ 28.962281] raw: 0100000000000200 ffff8880087a0c80 ffffea000039dc40 dead000000000005 [ 28.962856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d691a01 [ 28.963429] page dumped because: kasan: bad access detected [ 28.963848] [ 28.963983] Memory state around the buggy address: [ 28.964356] ffff88800c5cac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.964900] ffff88800c5cac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.965435] >ffff88800c5cad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.965968] ^ [ 28.966245] ffff88800c5cad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.966782] ffff88800c5cae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.967313] ================================================================== [ 28.967935] Disabling lock debugging due to kernel taint [ 30.977942] BUG: Bad rss-counter state mm:00000000c35b3252 type:MM_FILEPAGES val:33 [ 30.979377] BUG: Bad rss-counter state mm:00000000c35b3252 type:MM_ANONPAGES val:22 [ 31.456183] BUG: Bad rss-counter state mm:000000005759006b type:MM_FILEPAGES val:33 [ 31.457271] BUG: Bad rss-counter state mm:000000005759006b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56956' (ECDSA) to the list of known hosts. 2023/06/20 20:23:11 fuzzer started 2023/06/20 20:23:11 dialing manager at localhost:36067 2023/06/20 20:23:11 checking machine... 2023/06/20 20:23:11 checking revisions... [ 32.159943] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:23:11 testing simple program... [ 32.206360] cgroup: Unknown subsys name 'net' [ 32.243764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:23:11 Registers: info registers vcpu 0 RAX=1ffff11001bc3c5f RBX=ffff88800de1e2c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800de1e2f8 RBP=ffff88800f4b95c0 RSP=ffff88800f05f828 R8 =0000000000000001 R9 =ffffed1001e0bef9 R10=0000000000000003 R11=0030733a745f6c65 R12=dffffc0000000000 R13=ffff88800ec30b00 R14=ffffffff81eeadb0 R15=1ffff11001e0bf1d RIP=ffffffff818464e2 RFL=00000046 [---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 00007f46e508c700 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=00007f0b3fb87c50 CR3=000000001a0bc000 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=00000000000000000000000000000000 XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383336 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e37ca8 RCX=ffffffff86138e8c RDX=1ffff110011c6f2d RSI=0000000000000000 RDI=ffff888008e37968 RBP=ffff888008e30000 RSP=ffff888008e378e8 R8 =ffffffff86138e90 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e37ca8 R15=ffff888008e37958 RIP=ffffffff81131ca6 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 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=00007ffca887e000 CR3=000000001c996000 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=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