syzkaller login: [ 31.702109] BUG: Bad rss-counter state mm:000000007b6c0f81 type:MM_FILEPAGES val:33 [ 31.703106] BUG: Bad rss-counter state mm:000000007b6c0f81 type:MM_ANONPAGES val:22 [ 31.865731] ================================================================== [ 31.866631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.867558] Read of size 8 at addr ffff88800ed22880 by task sshd/219 [ 31.868340] [ 31.868659] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.869514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.870475] Call Trace: [ 31.870813] [ 31.871098] dump_stack_lvl+0x91/0xf0 [ 31.871636] print_report+0xcc/0x620 [ 31.872134] ? __virt_addr_valid+0x102/0x340 [ 31.872702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873342] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873961] kasan_report+0xbe/0xf0 [ 31.874445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875074] vma_interval_tree_remove+0xc75/0xec0 [ 31.875695] vma_prepare+0xc54/0x11a0 [ 31.876188] __split_vma+0x5af/0x950 [ 31.876661] ? __pfx___split_vma+0x10/0x10 [ 31.877200] ? find_held_lock+0x2c/0x110 [ 31.877726] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.878290] ? lock_is_held_type+0x9f/0x120 [ 31.878841] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.879459] ? mtree_range_walk+0x632/0x900 [ 31.880033] ? mas_walk+0x5c7/0x7c0 [ 31.880530] do_vmi_munmap+0x1f1/0x2b0 [ 31.881026] mmap_region+0x1f9/0x2660 [ 31.881507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.882027] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.882748] ? __pfx_lock_acquire+0x10/0x10 [ 31.883278] ? __pfx_mmap_region+0x10/0x10 [ 31.883816] ? security_mmap_addr+0x7d/0xa0 [ 31.884343] ? get_unmapped_area+0x1f5/0x3f0 [ 31.884898] do_mmap+0x854/0xf00 [ 31.885352] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.885848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.886416] ksys_mmap_pgoff+0x3af/0x500 [ 31.886920] do_syscall_64+0x3f/0x90 [ 31.887401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.888068] RIP: 0033:0x7f7a025add82 [ 31.888531] 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 [ 31.890675] RSP: 002b:00007ffc845f7be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.891593] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a025add82 [ 31.892469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a019e7000 [ 31.893321] RBP: 00007f7a019e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.894170] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594cb5b8ec0 [ 31.895028] R13: 00007ffc845f7c00 R14: 00007ffc845f7c30 R15: 00007ffc845f7f90 [ 31.895911] [ 31.896207] [ 31.896423] Allocated by task 212: [ 31.896858] kasan_save_stack+0x22/0x50 [ 31.897372] kasan_set_track+0x25/0x30 [ 31.897864] __kasan_slab_alloc+0x59/0x70 [ 31.898391] kmem_cache_alloc+0x16b/0x370 [ 31.898907] vm_area_dup+0x20/0x160 [ 31.899369] __split_vma+0x170/0x950 [ 31.899886] split_vma+0xc6/0x110 [ 31.900326] mprotect_fixup+0x8d2/0xb30 [ 31.900834] do_mprotect_pkey+0x87e/0xd40 [ 31.901356] __x64_sys_mprotect+0x78/0xc0 [ 31.901877] do_syscall_64+0x3f/0x90 [ 31.902353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902995] [ 31.903213] Freed by task 212: [ 31.903614] kasan_save_stack+0x22/0x50 [ 31.904123] kasan_set_track+0x25/0x30 [ 31.904618] kasan_save_free_info+0x2b/0x50 [ 31.905155] __kasan_slab_free+0x10a/0x190 [ 31.905691] kmem_cache_free+0x10d/0x4d0 [ 31.906198] rcu_core+0x8c8/0x2860 [ 31.906641] __do_softirq+0x1b7/0x7d4 [ 31.907117] [ 31.907334] Last potentially related work creation: [ 31.907941] kasan_save_stack+0x22/0x50 [ 31.908453] __kasan_record_aux_stack+0x8e/0xa0 [ 31.909033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.909679] remove_vma+0x139/0x170 [ 31.910137] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.910694] do_vmi_munmap+0x1f1/0x2b0 [ 31.911184] __vm_munmap+0x138/0x3a0 [ 31.911658] __x64_sys_munmap+0x59/0x80 [ 31.912163] do_syscall_64+0x3f/0x90 [ 31.912636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.913285] [ 31.913500] Second to last potentially related work creation: [ 31.914189] kasan_save_stack+0x22/0x50 [ 31.914697] __kasan_record_aux_stack+0x8e/0xa0 [ 31.915272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.915938] remove_vma+0x139/0x170 [ 31.916400] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.916955] do_vmi_munmap+0x1f1/0x2b0 [ 31.917440] mmap_region+0x1f9/0x2660 [ 31.917915] do_mmap+0x854/0xf00 [ 31.918347] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.918840] ksys_mmap_pgoff+0x3af/0x500 [ 31.919344] do_syscall_64+0x3f/0x90 [ 31.919830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.920479] [ 31.920694] The buggy address belongs to the object at ffff88800ed22828 [ 31.920694] which belongs to the cache vm_area_struct of size 168 [ 31.922194] The buggy address is located 88 bytes inside of [ 31.922194] freed 168-byte region [ffff88800ed22828, ffff88800ed228d0) [ 31.923623] [ 31.923841] The buggy address belongs to the physical page: [ 31.924504] page:00000000cf0b4f5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed22 [ 31.925601] memcg:ffff88800ded1201 [ 31.926034] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.926731] page_type: 0xffffffff() [ 31.927194] raw: 0100000000000200 ffff88800879fc80 ffffea0000368e00 dead00000000000b [ 31.928151] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded1201 [ 31.929071] page dumped because: kasan: bad access detected [ 31.929739] [ 31.929953] Memory state around the buggy address: [ 31.930546] ffff88800ed22780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.931412] ffff88800ed22800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.932294] >ffff88800ed22880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.933145] ^ [ 31.933560] ffff88800ed22900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.934421] ffff88800ed22980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.935282] ================================================================== [ 31.936274] Disabling lock debugging due to kernel taint [ 33.971813] BUG: Bad rss-counter state mm:00000000b12d0e61 type:MM_FILEPAGES val:33 [ 33.973426] BUG: Bad rss-counter state mm:00000000b12d0e61 type:MM_ANONPAGES val:22 [ 34.562456] BUG: Bad rss-counter state mm:0000000082ff996c type:MM_FILEPAGES val:33 [ 34.563732] BUG: Bad rss-counter state mm:0000000082ff996c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54469' (ECDSA) to the list of known hosts. 2023/06/19 17:48:26 fuzzer started 2023/06/19 17:48:26 dialing manager at localhost:44161 2023/06/19 17:48:26 checking machine... 2023/06/19 17:48:26 checking revisions... [ 35.275166] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:48:26 testing simple program... [ 35.328578] cgroup: Unknown subsys name 'net' [ 35.394789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:48:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff8880178bb680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800ff07a08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800f52f260 RIP=ffffffff814c0388 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 00007f39c051a900 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=00007f39c0acf650 CR3=000000000c950000 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=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 info registers vcpu 1 RAX=0000000080000002 RBX=ffff88806cc86570 RCX=000000000000000e RDX=ffff88806cc00000 RSI=ffffffff818cbb8c RDI=ffff8880166b67b0 RBP=ffff8880166b6758 RSP=ffff88801467f808 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=3830306234386136 R12=ffff8880166b67a0 R13=ffff8880166b67e8 R14=ffff8880166b6830 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007f7f7162e900 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=00007f7f70abd9b0 CR3=000000000f74e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3d0e5ec7c94e1ebd00000000000ae988 XMM05=ab14a9fe0d5758a10000000000136460 XMM06=806171799158d9670000000000135250 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000