syzkaller login: [ 30.879616] BUG: Bad rss-counter state mm:0000000072b9b01d type:MM_FILEPAGES val:33 [ 30.880859] BUG: Bad rss-counter state mm:0000000072b9b01d type:MM_ANONPAGES val:22 [ 30.934466] ================================================================== [ 30.935620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.936610] Read of size 8 at addr ffff88800e294b38 by task sshd/220 [ 30.937373] [ 30.937608] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.938515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.939511] Call Trace: [ 30.939829] [ 30.940112] dump_stack_lvl+0x91/0xf0 [ 30.940634] print_report+0xcc/0x620 [ 30.941122] ? __virt_addr_valid+0x102/0x340 [ 30.941693] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.942327] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.942967] kasan_report+0xbe/0xf0 [ 30.943454] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.944089] vma_interval_tree_remove+0xc75/0xec0 [ 30.944723] vma_prepare+0xc54/0x11a0 [ 30.945207] __split_vma+0x5af/0x950 [ 30.945696] ? __pfx___split_vma+0x10/0x10 [ 30.946254] ? find_held_lock+0x2c/0x110 [ 30.946807] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.947379] ? lock_is_held_type+0x9f/0x120 [ 30.947934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.948573] ? mtree_range_walk+0x632/0x900 [ 30.949139] ? mas_walk+0x5c7/0x7c0 [ 30.949643] do_vmi_munmap+0x1f1/0x2b0 [ 30.950140] mmap_region+0x1f9/0x2660 [ 30.950668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.951189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.951946] ? __pfx_lock_acquire+0x10/0x10 [ 30.952498] ? __pfx_mmap_region+0x10/0x10 [ 30.953036] ? security_mmap_addr+0x7d/0xa0 [ 30.953587] ? get_unmapped_area+0x1f5/0x3f0 [ 30.954141] do_mmap+0x854/0xf00 [ 30.954660] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.955160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.955823] ksys_mmap_pgoff+0x3af/0x500 [ 30.956365] do_syscall_64+0x3f/0x90 [ 30.956860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957535] RIP: 0033:0x7f9ea9848d82 [ 30.957997] 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 [ 30.960201] RSP: 002b:00007fff2350aef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.961135] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ea9848d82 [ 30.962006] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ea8c82000 [ 30.962897] RBP: 00007f9ea8c82000 R08: 0000000000000009 R09: 0000000000001000 [ 30.963782] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3aaa57ec0 [ 30.964658] R13: 00007fff2350af10 R14: 00007fff2350af40 R15: 00007fff2350b2a0 [ 30.965527] [ 30.965822] [ 30.966040] Allocated by task 213: [ 30.966501] kasan_save_stack+0x22/0x50 [ 30.967017] kasan_set_track+0x25/0x30 [ 30.967535] __kasan_slab_alloc+0x59/0x70 [ 30.968066] kmem_cache_alloc+0x16b/0x370 [ 30.968624] vm_area_dup+0x20/0x160 [ 30.969079] __split_vma+0x170/0x950 [ 30.969559] split_vma+0xc6/0x110 [ 30.969998] mprotect_fixup+0x8d2/0xb30 [ 30.970516] do_mprotect_pkey+0x87e/0xd40 [ 30.971042] __x64_sys_mprotect+0x78/0xc0 [ 30.971584] do_syscall_64+0x3f/0x90 [ 30.972057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.972725] [ 30.972943] Freed by task 213: [ 30.973342] kasan_save_stack+0x22/0x50 [ 30.973859] kasan_set_track+0x25/0x30 [ 30.974394] kasan_save_free_info+0x2b/0x50 [ 30.974943] __kasan_slab_free+0x10a/0x190 [ 30.975488] kmem_cache_free+0x10d/0x4d0 [ 30.976006] rcu_core+0x8c8/0x2860 [ 30.976459] __do_softirq+0x1b7/0x7d4 [ 30.976959] [ 30.977197] Last potentially related work creation: [ 30.977837] kasan_save_stack+0x22/0x50 [ 30.978362] __kasan_record_aux_stack+0x8e/0xa0 [ 30.978951] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.979686] remove_vma+0x139/0x170 [ 30.980147] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.980731] do_vmi_munmap+0x1f1/0x2b0 [ 30.981220] __vm_munmap+0x138/0x3a0 [ 30.981726] __x64_sys_munmap+0x59/0x80 [ 30.982255] do_syscall_64+0x3f/0x90 [ 30.982749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983395] [ 30.983628] The buggy address belongs to the object at ffff88800e294ae0 [ 30.983628] which belongs to the cache vm_area_struct of size 168 [ 30.985131] The buggy address is located 88 bytes inside of [ 30.985131] freed 168-byte region [ffff88800e294ae0, ffff88800e294b88) [ 30.986592] [ 30.986815] The buggy address belongs to the physical page: [ 30.987489] page:00000000df11f611 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe294 [ 30.988610] memcg:ffff88800ee01301 [ 30.989045] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.989714] page_type: 0xffffffff() [ 30.990182] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.991134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee01301 [ 30.992057] page dumped because: kasan: bad access detected [ 30.992746] [ 30.992966] Memory state around the buggy address: [ 30.993574] ffff88800e294a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.994462] ffff88800e294a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.995340] >ffff88800e294b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.996215] ^ [ 30.996853] ffff88800e294b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.997731] ffff88800e294c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.998621] ================================================================== [ 30.999706] Disabling lock debugging due to kernel taint [ 32.923406] BUG: Bad rss-counter state mm:000000005e1c9ad9 type:MM_FILEPAGES val:33 [ 32.924304] BUG: Bad rss-counter state mm:000000005e1c9ad9 type:MM_ANONPAGES val:22 [ 33.449350] BUG: Bad rss-counter state mm:00000000c0d91371 type:MM_FILEPAGES val:33 [ 33.450474] BUG: Bad rss-counter state mm:00000000c0d91371 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51956' (ECDSA) to the list of known hosts. 2023/06/20 14:49:14 fuzzer started 2023/06/20 14:49:14 dialing manager at localhost:36067 2023/06/20 14:49:14 checking machine... 2023/06/20 14:49:14 checking revisions... [ 34.197374] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:49:15 testing simple program... [ 34.247175] cgroup: Unknown subsys name 'net' [ 34.286386] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:49:14 Registers: info registers vcpu 0 RAX=ffffffff86098095 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff86098094 RBP=ffff88800e7c7540 RSP=ffff88800e7c7428 R8 =1ffffffff0c13012 R9 =ffff88800e7c7528 R10=0000000000038001 R11=0000000000006097 R12=ffff88800e7c7548 R13=ffff88800e7c7530 R14=ffff88800e7c74e8 R15=ffff88800e7c74e8 RIP=ffffffff811311d7 RFL=00000217 [----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 00007f9bf112d700 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=00007ffe1e213e78 CR3=000000000eeda000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30323430362074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303234 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=0000000000000001 RBX=1ffff110011b4f8f RCX=ffffffff845343a7 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00000000fffbed10 RSP=ffff888008da7c78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000003 R12=0000000000000001 R13=ffffffff8540f200 R14=ffff888008da7c98 R15=ffff888008da7dc0 RIP=ffffffff845343af RFL=00000247 [---Z-PC] 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=00007f620d493650 CR3=00000000169a0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000