syzkaller login: [ 33.129880] BUG: Bad rss-counter state mm:000000008225dc1d type:MM_FILEPAGES val:33 [ 33.131094] BUG: Bad rss-counter state mm:000000008225dc1d type:MM_ANONPAGES val:22 [ 33.295729] ================================================================== [ 33.296812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.297921] Read of size 8 at addr ffff8880169e85c8 by task sshd/219 [ 33.299041] [ 33.299308] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.300167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.301168] Call Trace: [ 33.301491] [ 33.301772] dump_stack_lvl+0x91/0xf0 [ 33.302263] print_report+0xcc/0x620 [ 33.302748] ? __virt_addr_valid+0x102/0x340 [ 33.303315] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.303936] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.304550] kasan_report+0xbe/0xf0 [ 33.305028] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.305641] vma_interval_tree_remove+0xc75/0xec0 [ 33.306249] vma_prepare+0xc54/0x11a0 [ 33.306730] __split_vma+0x5af/0x950 [ 33.307225] ? __pfx___split_vma+0x10/0x10 [ 33.307754] ? find_held_lock+0x2c/0x110 [ 33.308274] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.308842] ? lock_is_held_type+0x9f/0x120 [ 33.309381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.309983] ? mtree_range_walk+0x632/0x900 [ 33.310534] ? mas_walk+0x5c7/0x7c0 [ 33.311019] do_vmi_munmap+0x1f1/0x2b0 [ 33.311516] mmap_region+0x1f9/0x2660 [ 33.311999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.312511] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.313223] ? __pfx_lock_acquire+0x10/0x10 [ 33.313752] ? __pfx_mmap_region+0x10/0x10 [ 33.314284] ? security_mmap_addr+0x7d/0xa0 [ 33.314818] ? get_unmapped_area+0x1f5/0x3f0 [ 33.315366] do_mmap+0x854/0xf00 [ 33.315806] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.316297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.316858] ksys_mmap_pgoff+0x3af/0x500 [ 33.317362] do_syscall_64+0x3f/0x90 [ 33.317841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.318485] RIP: 0033:0x7fc2ee49bd82 [ 33.318942] 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 [ 33.321110] RSP: 002b:00007fff3fccb288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.322023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2ee49bd82 [ 33.322878] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2ed8d5000 [ 33.323742] RBP: 00007fc2ed8d5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.324600] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbeafe0ec0 [ 33.325438] R13: 00007fff3fccb2a0 R14: 00007fff3fccb2d0 R15: 00007fff3fccb630 [ 33.326326] [ 33.326643] [ 33.326916] Allocated by task 212: [ 33.327368] kasan_save_stack+0x22/0x50 [ 33.327876] kasan_set_track+0x25/0x30 [ 33.328372] __kasan_slab_alloc+0x59/0x70 [ 33.328900] kmem_cache_alloc+0x16b/0x370 [ 33.329414] vm_area_dup+0x20/0x160 [ 33.329868] __split_vma+0x170/0x950 [ 33.330333] split_vma+0xc6/0x110 [ 33.330774] mprotect_fixup+0x8d2/0xb30 [ 33.331285] do_mprotect_pkey+0x87e/0xd40 [ 33.331802] __x64_sys_mprotect+0x78/0xc0 [ 33.332318] do_syscall_64+0x3f/0x90 [ 33.332787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.333428] [ 33.333645] Freed by task 19: [ 33.334033] kasan_save_stack+0x22/0x50 [ 33.334540] kasan_set_track+0x25/0x30 [ 33.335034] kasan_save_free_info+0x2b/0x50 [ 33.335576] __kasan_slab_free+0x10a/0x190 [ 33.336110] kmem_cache_free+0x10d/0x4d0 [ 33.336624] rcu_core+0x8c8/0x2860 [ 33.337079] __do_softirq+0x1b7/0x7d4 [ 33.337559] [ 33.337775] Last potentially related work creation: [ 33.338361] kasan_save_stack+0x22/0x50 [ 33.338864] __kasan_record_aux_stack+0x8e/0xa0 [ 33.339457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.340099] remove_vma+0x139/0x170 [ 33.340553] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.341110] do_vmi_munmap+0x1f1/0x2b0 [ 33.341595] __vm_munmap+0x138/0x3a0 [ 33.342061] __x64_sys_munmap+0x59/0x80 [ 33.342552] do_syscall_64+0x3f/0x90 [ 33.343034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.343678] [ 33.343897] The buggy address belongs to the object at ffff8880169e8570 [ 33.343897] which belongs to the cache vm_area_struct of size 168 [ 33.345360] The buggy address is located 88 bytes inside of [ 33.345360] freed 168-byte region [ffff8880169e8570, ffff8880169e8618) [ 33.346758] [ 33.346978] The buggy address belongs to the physical page: [ 33.347660] page:000000000a5bee92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169e8 [ 33.348742] memcg:ffff88800e33a701 [ 33.349171] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.349865] page_type: 0xffffffff() [ 33.350314] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.351238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e33a701 [ 33.352145] page dumped because: kasan: bad access detected [ 33.352803] [ 33.353023] Memory state around the buggy address: [ 33.353602] ffff8880169e8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.354451] ffff8880169e8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.355305] >ffff8880169e8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.356145] ^ [ 33.356807] ffff8880169e8600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 33.357669] ffff8880169e8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.358519] ================================================================== [ 33.359659] Disabling lock debugging due to kernel taint [ 35.328131] BUG: Bad rss-counter state mm:00000000d1af9f25 type:MM_FILEPAGES val:33 [ 35.329384] BUG: Bad rss-counter state mm:00000000d1af9f25 type:MM_ANONPAGES val:22 [ 35.722889] BUG: Bad rss-counter state mm:00000000f0cb292e type:MM_FILEPAGES val:33 [ 35.723924] BUG: Bad rss-counter state mm:00000000f0cb292e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36380' (ECDSA) to the list of known hosts. 2023/06/20 02:18:58 fuzzer started 2023/06/20 02:18:58 dialing manager at localhost:44161 2023/06/20 02:18:58 checking machine... 2023/06/20 02:18:58 checking revisions... [ 36.422064] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:18:59 testing simple program... [ 36.468758] cgroup: Unknown subsys name 'net' [ 36.512361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:18:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801468f218 RCX=0000000000000001 RDX=1ffff110028d1e45 RSI=ffff88801468f348 RDI=ffff88801468f228 RBP=ffff88801468f348 RSP=ffff88801468f170 R8 =ffffffff860d68fa R9 =ffff88801468f258 R10=0000000000038001 R11=0000000000010b7e R12=0000000000000008 R13=ffff888014688000 R14=ffff88801468f350 R15=ffff88801468f218 RIP=ffffffff81130468 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 00007fd6e785c900 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=0000559612148318 CR3=000000000c972000 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=d7cab4bf89c4378d00000000000ae988 XMM05=d9466e35dad2b7dd00000000001351e0 XMM06=32c1d6cc2b3097b10000000000134288 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007fffae008598 CR3=0000000018f46000 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=2038353a38313a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000