syzkaller login: [ 90.449014] BUG: Bad rss-counter state mm:000000007c110796 type:MM_FILEPAGES val:33 [ 90.450085] BUG: Bad rss-counter state mm:000000007c110796 type:MM_ANONPAGES val:22 [ 90.625574] ================================================================== [ 90.626420] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 90.627319] Read of size 8 at addr ffff88800e08da50 by task sshd/220 [ 90.628030] [ 90.628239] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 90.629301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 90.630203] Call Trace: [ 90.630523] [ 90.630791] dump_stack_lvl+0x91/0xf0 [ 90.631250] print_report+0xcc/0x620 [ 90.631705] ? __virt_addr_valid+0x102/0x340 [ 90.632225] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.632800] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.633383] kasan_report+0xbe/0xf0 [ 90.633831] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.634407] vma_interval_tree_remove+0xc75/0xec0 [ 90.634967] vma_prepare+0xc54/0x11a0 [ 90.635417] __split_vma+0x5af/0x950 [ 90.635863] ? __pfx___split_vma+0x10/0x10 [ 90.636359] ? find_held_lock+0x2c/0x110 [ 90.636848] do_vmi_align_munmap+0x2ba/0x11f0 [ 90.637386] ? lock_is_held_type+0x9f/0x120 [ 90.637890] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 90.638463] ? mtree_range_walk+0x632/0x900 [ 90.638982] ? mas_walk+0x5c7/0x7c0 [ 90.639426] do_vmi_munmap+0x1f1/0x2b0 [ 90.639889] mmap_region+0x1f9/0x2660 [ 90.640337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 90.640815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 90.641500] ? __pfx_lock_acquire+0x10/0x10 [ 90.642000] ? __pfx_mmap_region+0x10/0x10 [ 90.642497] ? security_mmap_addr+0x7d/0xa0 [ 90.642993] ? get_unmapped_area+0x1f5/0x3f0 [ 90.643504] do_mmap+0x854/0xf00 [ 90.643913] vm_mmap_pgoff+0x1a6/0x3a0 [ 90.644374] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 90.644900] ksys_mmap_pgoff+0x3af/0x500 [ 90.645381] do_syscall_64+0x3f/0x90 [ 90.645829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.646438] RIP: 0033:0x7f2ad3c20d82 [ 90.646868] 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 [ 90.648842] RSP: 002b:00007ffe800a6cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 90.649697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ad3c20d82 [ 90.650488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ad305a000 [ 90.651378] RBP: 00007f2ad305a000 R08: 0000000000000009 R09: 0000000000001000 [ 90.652315] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d629c6aec0 [ 90.653267] R13: 00007ffe800a6ce0 R14: 00007ffe800a6d10 R15: 00007ffe800a7070 [ 90.654220] [ 90.654547] [ 90.654791] Allocated by task 213: [ 90.655265] kasan_save_stack+0x22/0x50 [ 90.655831] kasan_set_track+0x25/0x30 [ 90.656383] __kasan_slab_alloc+0x59/0x70 [ 90.656968] kmem_cache_alloc+0x16b/0x370 [ 90.657547] vm_area_dup+0x20/0x160 [ 90.658053] __split_vma+0x170/0x950 [ 90.658578] split_vma+0xc6/0x110 [ 90.659065] mprotect_fixup+0x8d2/0xb30 [ 90.659631] do_mprotect_pkey+0x87e/0xd40 [ 90.660227] __x64_sys_mprotect+0x78/0xc0 [ 90.660808] do_syscall_64+0x3f/0x90 [ 90.661353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.662065] [ 90.662304] Freed by task 213: [ 90.662738] kasan_save_stack+0x22/0x50 [ 90.663289] kasan_set_track+0x25/0x30 [ 90.663844] kasan_save_free_info+0x2b/0x50 [ 90.664432] __kasan_slab_free+0x10a/0x190 [ 90.665026] kmem_cache_free+0x10d/0x4d0 [ 90.665603] rcu_core+0x8c8/0x2860 [ 90.666096] __do_softirq+0x1b7/0x7d4 [ 90.666621] [ 90.666865] Last potentially related work creation: [ 90.667512] kasan_save_stack+0x22/0x50 [ 90.668070] __kasan_record_aux_stack+0x8e/0xa0 [ 90.668707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 90.669443] remove_vma+0x139/0x170 [ 90.669945] do_vmi_align_munmap+0xd4a/0x11f0 [ 90.670563] do_vmi_munmap+0x1f1/0x2b0 [ 90.671100] __vm_munmap+0x138/0x3a0 [ 90.671619] __x64_sys_munmap+0x59/0x80 [ 90.672172] do_syscall_64+0x3f/0x90 [ 90.672695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.673416] [ 90.673662] The buggy address belongs to the object at ffff88800e08d9f8 [ 90.673662] which belongs to the cache vm_area_struct of size 168 [ 90.675271] The buggy address is located 88 bytes inside of [ 90.675271] freed 168-byte region [ffff88800e08d9f8, ffff88800e08daa0) [ 90.676815] [ 90.677057] The buggy address belongs to the physical page: [ 90.677787] page:00000000f6b2ad0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe08d [ 90.678977] memcg:ffff88800dea6b01 [ 90.679450] flags: 0x100000000000200(slab|node=0|zone=1) [ 90.680161] page_type: 0xffffffff() [ 90.680661] raw: 0100000000000200 ffff88800879fc80 ffffea00003182c0 dead000000000004 [ 90.681686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dea6b01 [ 90.682682] page dumped because: kasan: bad access detected [ 90.683403] [ 90.683645] Memory state around the buggy address: [ 90.684289] ffff88800e08d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.685245] ffff88800e08d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 90.686184] >ffff88800e08da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.687119] ^ [ 90.687887] ffff88800e08da80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 90.688829] ffff88800e08db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 90.689784] ================================================================== [ 90.690875] Disabling lock debugging due to kernel taint [ 92.538616] BUG: Bad rss-counter state mm:000000006f0f4590 type:MM_FILEPAGES val:33 [ 92.539723] BUG: Bad rss-counter state mm:000000006f0f4590 type:MM_ANONPAGES val:22 [ 93.022368] BUG: Bad rss-counter state mm:0000000036c350ae type:MM_FILEPAGES val:33 [ 93.023568] BUG: Bad rss-counter state mm:0000000036c350ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8326' (ECDSA) to the list of known hosts. 2023/06/19 21:29:01 fuzzer started 2023/06/19 21:29:02 dialing manager at localhost:44161 2023/06/19 21:29:02 checking machine... 2023/06/19 21:29:02 checking revisions... [ 93.728594] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:29:02 testing simple program... [ 93.774992] cgroup: Unknown subsys name 'net' [ 93.818856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:28:31 Registers: info registers vcpu 0 RAX=1ffffffff0bc2258 RBX=ffffffff85e112c4 RCX=ffffffff81935d99 RDX=0000000000000000 RSI=ffffffff86156234 RDI=ffffffff85e112c4 RBP=ffffffff85e112c4 RSP=ffff888019f374e8 R8 =ffffffff86156234 R9 =ffff888019f375e0 R10=0000000000038001 R11=0000000000025fbc R12=ffffffff85e112c4 R13=ffffffff85e112c4 R14=ffffffff85e112c4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f886be7b700 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=00007fff99e3ed08 CR3=000000000de20000 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=2031303a39323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880140bfd80 RCX=0000000000000000 RDX=ffff888019ef51c0 RSI=ffffffff811f7919 RDI=ffff88800e4b7998 RBP=ffff88800e4b7990 RSP=ffff8880140bfbc8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000000000e5 R13=ffff88800e4b78c0 R14=0000000000000019 R15=0000000000000000 RIP=ffffffff811f791a 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 00007f9d58a91900 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=00007ffc0f531000 CR3=000000000da86000 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