syzkaller login: [ 28.758473] BUG: Bad rss-counter state mm:00000000886f455f type:MM_FILEPAGES val:33 [ 28.760059] BUG: Bad rss-counter state mm:00000000886f455f type:MM_ANONPAGES val:22 [ 28.893238] ================================================================== [ 28.894367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.895592] Read of size 8 at addr ffff88800e4cca50 by task sshd/220 [ 28.896357] [ 28.896573] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.897441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.898405] Call Trace: [ 28.898718] [ 28.899000] dump_stack_lvl+0x91/0xf0 [ 28.899496] print_report+0xcc/0x620 [ 28.899968] ? __virt_addr_valid+0x102/0x340 [ 28.900515] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901126] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901732] kasan_report+0xbe/0xf0 [ 28.902205] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902831] vma_interval_tree_remove+0xc75/0xec0 [ 28.903436] vma_prepare+0xc54/0x11a0 [ 28.903911] __split_vma+0x5af/0x950 [ 28.904379] ? __pfx___split_vma+0x10/0x10 [ 28.904902] ? find_held_lock+0x2c/0x110 [ 28.905421] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.905981] ? lock_is_held_type+0x9f/0x120 [ 28.906535] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.907130] ? mtree_range_walk+0x632/0x900 [ 28.907682] ? mas_walk+0x5c7/0x7c0 [ 28.908151] do_vmi_munmap+0x1f1/0x2b0 [ 28.908639] mmap_region+0x1f9/0x2660 [ 28.909110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.909611] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.910320] ? __pfx_lock_acquire+0x10/0x10 [ 28.910844] ? __pfx_mmap_region+0x10/0x10 [ 28.911368] ? security_mmap_addr+0x7d/0xa0 [ 28.911889] ? get_unmapped_area+0x1f5/0x3f0 [ 28.912427] do_mmap+0x854/0xf00 [ 28.912856] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.913344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.913899] ksys_mmap_pgoff+0x3af/0x500 [ 28.914425] do_syscall_64+0x3f/0x90 [ 28.914903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915563] RIP: 0033:0x7f1fd42c1d82 [ 28.916022] 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 [ 28.918117] RSP: 002b:00007fffdecaace8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.919024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fd42c1d82 [ 28.919861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1fd36fb000 [ 28.920709] RBP: 00007f1fd36fb000 R08: 0000000000000009 R09: 0000000000001000 [ 28.921550] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b1f03cec0 [ 28.922399] R13: 00007fffdecaad00 R14: 00007fffdecaad30 R15: 00007fffdecab090 [ 28.923252] [ 28.923538] [ 28.923755] Allocated by task 213: [ 28.924182] kasan_save_stack+0x22/0x50 [ 28.924682] kasan_set_track+0x25/0x30 [ 28.925165] __kasan_slab_alloc+0x59/0x70 [ 28.925683] kmem_cache_alloc+0x16b/0x370 [ 28.926199] vm_area_dup+0x20/0x160 [ 28.926654] __split_vma+0x170/0x950 [ 28.927117] split_vma+0xc6/0x110 [ 28.927556] mprotect_fixup+0x8d2/0xb30 [ 28.928061] do_mprotect_pkey+0x87e/0xd40 [ 28.928576] __x64_sys_mprotect+0x78/0xc0 [ 28.929095] do_syscall_64+0x3f/0x90 [ 28.929573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930205] [ 28.930438] Freed by task 213: [ 28.930826] kasan_save_stack+0x22/0x50 [ 28.931323] kasan_set_track+0x25/0x30 [ 28.931815] kasan_save_free_info+0x2b/0x50 [ 28.932336] __kasan_slab_free+0x10a/0x190 [ 28.932867] kmem_cache_free+0x10d/0x4d0 [ 28.933371] rcu_core+0x8c8/0x2860 [ 28.933817] __do_softirq+0x1b7/0x7d4 [ 28.934292] [ 28.934509] Last potentially related work creation: [ 28.935086] kasan_save_stack+0x22/0x50 [ 28.935582] __kasan_record_aux_stack+0x8e/0xa0 [ 28.936277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.936914] remove_vma+0x139/0x170 [ 28.937361] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.937908] do_vmi_munmap+0x1f1/0x2b0 [ 28.938410] __vm_munmap+0x138/0x3a0 [ 28.938876] __x64_sys_munmap+0x59/0x80 [ 28.939373] do_syscall_64+0x3f/0x90 [ 28.939847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.940483] [ 28.940698] Second to last potentially related work creation: [ 28.941370] kasan_save_stack+0x22/0x50 [ 28.941867] __kasan_record_aux_stack+0x8e/0xa0 [ 28.942457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.943091] remove_vma+0x139/0x170 [ 28.943545] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.944099] do_vmi_munmap+0x1f1/0x2b0 [ 28.944581] mmap_region+0x1f9/0x2660 [ 28.945058] do_mmap+0x854/0xf00 [ 28.945484] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.945963] ksys_mmap_pgoff+0x3af/0x500 [ 28.946469] do_syscall_64+0x3f/0x90 [ 28.946937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947574] [ 28.947786] The buggy address belongs to the object at ffff88800e4cc9f8 [ 28.947786] which belongs to the cache vm_area_struct of size 168 [ 28.949231] The buggy address is located 88 bytes inside of [ 28.949231] freed 168-byte region [ffff88800e4cc9f8, ffff88800e4ccaa0) [ 28.950652] [ 28.950865] The buggy address belongs to the physical page: [ 28.951525] page:0000000044510f36 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4cc [ 28.952605] memcg:ffff88800c504601 [ 28.953027] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.953713] page_type: 0xffffffff() [ 28.954164] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.955075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c504601 [ 28.955974] page dumped because: kasan: bad access detected [ 28.956624] [ 28.956836] Memory state around the buggy address: [ 28.957410] ffff88800e4cc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.958244] ffff88800e4cc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.959120] >ffff88800e4cca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.959963] ^ [ 28.960655] ffff88800e4cca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.961506] ffff88800e4ccb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.962343] ================================================================== [ 28.963272] Disabling lock debugging due to kernel taint [ 30.403516] BUG: Bad rss-counter state mm:00000000b450efbd type:MM_FILEPAGES val:33 [ 30.404037] BUG: Bad rss-counter state mm:00000000b450efbd type:MM_ANONPAGES val:22 [ 30.826462] BUG: Bad rss-counter state mm:000000008f9b4778 type:MM_FILEPAGES val:33 [ 30.827640] BUG: Bad rss-counter state mm:000000008f9b4778 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40107' (ECDSA) to the list of known hosts. 2023/06/20 17:03:33 fuzzer started 2023/06/20 17:03:33 dialing manager at localhost:36067 2023/06/20 17:03:33 checking machine... 2023/06/20 17:03:33 checking revisions... [ 31.534081] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:03:33 testing simple program... [ 31.582101] cgroup: Unknown subsys name 'net' [ 31.643740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:03:33 Registers: info registers vcpu 0 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=1ffffffff0c13012 RDI=ffffffff85d92c20 RBP=ffff8880147cf7f8 RSP=ffff8880147cf6e0 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880147cf800 R13=ffff8880147cf7e8 R14=ffff8880147cf7e1 R15=ffff8880147cf7a0 RIP=ffffffff81130a5b 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 00007fadcedda900 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=00007fadce21c970 CR3=000000000ecfe000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=adadf6bcb49924ad00000000000ae988 XMM05=bae1a030225711da0000000000133cf0 XMM06=4fda316b135da52b0000000000132d90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff88800c658000 RSI=ffffffff83c60a6a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880164bf6a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000071 R11=000008b6000008b6 R12=0000000000000000 R13=0000000000000071 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0880 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 00007fa468f19900 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=00007fa4694d0618 CR3=0000000015b8c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000