syzkaller login: [ 39.264354] BUG: Bad rss-counter state mm:000000001db17950 type:MM_FILEPAGES val:33 [ 39.266121] BUG: Bad rss-counter state mm:000000001db17950 type:MM_ANONPAGES val:22 [ 39.511059] ================================================================== [ 39.511720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.512611] Read of size 8 at addr ffff88800ec1b058 by task sshd/220 [ 39.513162] [ 39.513322] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.514461] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.515077] Call Trace: [ 39.515278] [ 39.516231] dump_stack_lvl+0x91/0xf0 [ 39.516572] print_report+0xcc/0x620 [ 39.516909] ? __virt_addr_valid+0x102/0x340 [ 39.517412] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.517830] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.518341] kasan_report+0xbe/0xf0 [ 39.518639] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.519023] vma_interval_tree_remove+0xc75/0xec0 [ 39.519407] vma_prepare+0xc54/0x11a0 [ 39.519700] __split_vma+0x5af/0x950 [ 39.519998] ? __pfx___split_vma+0x10/0x10 [ 39.520343] ? find_held_lock+0x2c/0x110 [ 39.520683] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.521101] ? lock_is_held_type+0x9f/0x120 [ 39.521472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.521886] ? mtree_range_walk+0x632/0x900 [ 39.522255] ? mas_walk+0x5c7/0x7c0 [ 39.522561] do_vmi_munmap+0x1f1/0x2b0 [ 39.522872] mmap_region+0x1f9/0x2660 [ 39.523201] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.523548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.524027] ? __pfx_lock_acquire+0x10/0x10 [ 39.524384] ? __pfx_mmap_region+0x10/0x10 [ 39.524741] ? security_mmap_addr+0x7d/0xa0 [ 39.525257] ? get_unmapped_area+0x1f5/0x3f0 [ 39.525616] do_mmap+0x854/0xf00 [ 39.525910] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.526246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.526622] ksys_mmap_pgoff+0x3af/0x500 [ 39.526968] do_syscall_64+0x3f/0x90 [ 39.527297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.527737] RIP: 0033:0x7f0559ba6d82 [ 39.528046] 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 [ 39.529600] RSP: 002b:00007ffc132015f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.530250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0559ba6d82 [ 39.530854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0558fe0000 [ 39.531444] RBP: 00007f0558fe0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.532014] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aaafea6ec0 [ 39.532582] R13: 00007ffc13201610 R14: 00007ffc13201640 R15: 00007ffc132019a0 [ 39.533271] [ 39.533475] [ 39.533625] Allocated by task 213: [ 39.533921] kasan_save_stack+0x22/0x50 [ 39.534257] kasan_set_track+0x25/0x30 [ 39.534590] __kasan_slab_alloc+0x59/0x70 [ 39.534950] kmem_cache_alloc+0x16b/0x370 [ 39.535297] vm_area_dup+0x20/0x160 [ 39.535605] __split_vma+0x170/0x950 [ 39.535925] split_vma+0xc6/0x110 [ 39.536221] mprotect_fixup+0x8d2/0xb30 [ 39.536563] do_mprotect_pkey+0x87e/0xd40 [ 39.537012] __x64_sys_mprotect+0x78/0xc0 [ 39.537383] do_syscall_64+0x3f/0x90 [ 39.537702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.538133] [ 39.538279] Freed by task 213: [ 39.538545] kasan_save_stack+0x22/0x50 [ 39.538889] kasan_set_track+0x25/0x30 [ 39.539222] kasan_save_free_info+0x2b/0x50 [ 39.539581] __kasan_slab_free+0x10a/0x190 [ 39.539937] kmem_cache_free+0x10d/0x4d0 [ 39.540279] rcu_core+0x8c8/0x2860 [ 39.540585] __do_softirq+0x1b7/0x7d4 [ 39.541030] [ 39.541183] Last potentially related work creation: [ 39.541573] kasan_save_stack+0x22/0x50 [ 39.541913] __kasan_record_aux_stack+0x8e/0xa0 [ 39.542299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.542734] remove_vma+0x139/0x170 [ 39.543041] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.543416] do_vmi_munmap+0x1f1/0x2b0 [ 39.543744] __vm_munmap+0x138/0x3a0 [ 39.544065] __x64_sys_munmap+0x59/0x80 [ 39.544409] do_syscall_64+0x3f/0x90 [ 39.544729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.545258] [ 39.545410] The buggy address belongs to the object at ffff88800ec1b000 [ 39.545410] which belongs to the cache vm_area_struct of size 168 [ 39.546405] The buggy address is located 88 bytes inside of [ 39.546405] freed 168-byte region [ffff88800ec1b000, ffff88800ec1b0a8) [ 39.547361] [ 39.547510] The buggy address belongs to the physical page: [ 39.547952] page:00000000c5fa3783 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec1b [ 39.548726] memcg:ffff88800dc7a101 [ 39.549181] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.549693] page_type: 0xffffffff() [ 39.550017] raw: 0100000000000200 ffff88800879fc80 ffffea00002e4540 dead000000000005 [ 39.550692] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc7a101 [ 39.551322] page dumped because: kasan: bad access detected [ 39.551774] [ 39.551923] Memory state around the buggy address: [ 39.552333] ffff88800ec1af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 39.552943] ffff88800ec1af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.553558] >ffff88800ec1b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.554162] ^ [ 39.554652] ffff88800ec1b080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 39.555214] ffff88800ec1b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.555785] ================================================================== [ 39.556725] Disabling lock debugging due to kernel taint [ 41.829029] BUG: Bad rss-counter state mm:000000000fda8cfd type:MM_FILEPAGES val:33 [ 41.829671] BUG: Bad rss-counter state mm:000000000fda8cfd type:MM_ANONPAGES val:22 [ 42.828215] BUG: Bad rss-counter state mm:00000000fb9854c5 type:MM_FILEPAGES val:33 [ 42.829199] BUG: Bad rss-counter state mm:00000000fb9854c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18492' (ECDSA) to the list of known hosts. 2023/06/20 00:02:44 fuzzer started 2023/06/20 00:02:44 dialing manager at localhost:44161 2023/06/20 00:02:44 checking machine... 2023/06/20 00:02:44 checking revisions... [ 43.695533] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:02:44 testing simple program... [ 43.747735] cgroup: Unknown subsys name 'net' [ 43.818928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:02:43 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff88800f6d4000 RBP=ffffea0000767680 RSP=ffff88801597fce0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff88800f6d4000 R13=0000000000000001 R14=0000000000000cc0 R15=0000000000000000 RIP=ffffffff818310b1 RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007f8a93ce23e8 CR3=000000000dd2c000 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=7075733562726b62696c2f756e672d78 XMM02=00302e6f732e74726f70707573356272 XMM03=6b62696c2f756e672d78756e696c2d34 XMM04=00000000000000000000000000000000 XMM05=00007f8a94210f6000007f8a93ff3f30 XMM06=00007f8a93ff3a2000007f8a93ff3510 XMM07=00007f8a93ff300000007f8a94211a20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81746134 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002f8fef9 RSI=ffffffff81746134 RDI=ffff888017c7f838 RBP=ffff888017c7f808 RSP=ffff888017c7f768 R8 =0000000000000001 R9 =ffff888017c7f7b0 R10=0000000000038001 R11=000000000001dc07 R12=ffff888017c7f838 R13=0000000000000000 R14=ffff888017d13680 R15=ffff888016ad3480 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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=00007f22df41d328 CR3=000000000b392000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000