syzkaller login: [ 31.712720] BUG: Bad rss-counter state mm:000000007ceee794 type:MM_FILEPAGES val:33 [ 31.713952] BUG: Bad rss-counter state mm:000000007ceee794 type:MM_ANONPAGES val:22 [ 31.750178] ================================================================== [ 31.751068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.751989] Read of size 8 at addr ffff888016648798 by task sshd/220 [ 31.752765] [ 31.752990] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.753940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.754898] Call Trace: [ 31.755221] [ 31.755528] dump_stack_lvl+0x91/0xf0 [ 31.756018] print_report+0xcc/0x620 [ 31.756495] ? __virt_addr_valid+0x102/0x340 [ 31.757059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.757670] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.758275] kasan_report+0xbe/0xf0 [ 31.758750] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.759372] vma_interval_tree_remove+0xc75/0xec0 [ 31.759976] vma_prepare+0xc54/0x11a0 [ 31.760457] __split_vma+0x5af/0x950 [ 31.760953] ? __pfx___split_vma+0x10/0x10 [ 31.761529] ? find_held_lock+0x2c/0x110 [ 31.762103] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.762725] ? lock_is_held_type+0x9f/0x120 [ 31.763332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.763993] ? mtree_range_walk+0x632/0x900 [ 31.764590] ? mas_walk+0x5c7/0x7c0 [ 31.765133] do_vmi_munmap+0x1f1/0x2b0 [ 31.765680] mmap_region+0x1f9/0x2660 [ 31.766211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.766770] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.767555] ? __pfx_lock_acquire+0x10/0x10 [ 31.768129] ? __pfx_mmap_region+0x10/0x10 [ 31.768705] ? security_mmap_addr+0x7d/0xa0 [ 31.769291] ? get_unmapped_area+0x1f5/0x3f0 [ 31.769878] do_mmap+0x854/0xf00 [ 31.770350] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.770893] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.771511] ksys_mmap_pgoff+0x3af/0x500 [ 31.772073] do_syscall_64+0x3f/0x90 [ 31.772593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773302] RIP: 0033:0x7f03bf382d82 [ 31.773804] 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 [ 31.776095] RSP: 002b:00007ffe9ec552b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.777107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03bf382d82 [ 31.778027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03be7bc000 [ 31.778962] RBP: 00007f03be7bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.779882] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557477d54ec0 [ 31.780805] R13: 00007ffe9ec552d0 R14: 00007ffe9ec55300 R15: 00007ffe9ec55660 [ 31.781752] [ 31.782068] [ 31.782295] Allocated by task 213: [ 31.782776] kasan_save_stack+0x22/0x50 [ 31.783333] kasan_set_track+0x25/0x30 [ 31.783878] __kasan_slab_alloc+0x59/0x70 [ 31.784433] kmem_cache_alloc+0x16b/0x370 [ 31.785005] vm_area_dup+0x20/0x160 [ 31.785494] __split_vma+0x170/0x950 [ 31.786003] split_vma+0xc6/0x110 [ 31.786520] mprotect_fixup+0x8d2/0xb30 [ 31.787063] do_mprotect_pkey+0x87e/0xd40 [ 31.787579] __x64_sys_mprotect+0x78/0xc0 [ 31.788129] do_syscall_64+0x3f/0x90 [ 31.788610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.789286] [ 31.789506] Freed by task 213: [ 31.789907] kasan_save_stack+0x22/0x50 [ 31.790412] kasan_set_track+0x25/0x30 [ 31.790916] kasan_save_free_info+0x2b/0x50 [ 31.791459] __kasan_slab_free+0x10a/0x190 [ 31.791994] kmem_cache_free+0x10d/0x4d0 [ 31.792508] rcu_core+0x8c8/0x2860 [ 31.792978] __do_softirq+0x1b7/0x7d4 [ 31.793455] [ 31.793673] Last potentially related work creation: [ 31.794258] kasan_save_stack+0x22/0x50 [ 31.794764] __kasan_record_aux_stack+0x8e/0xa0 [ 31.795351] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.795992] remove_vma+0x139/0x170 [ 31.796443] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.797023] do_vmi_munmap+0x1f1/0x2b0 [ 31.797509] __vm_munmap+0x138/0x3a0 [ 31.797979] __x64_sys_munmap+0x59/0x80 [ 31.798480] do_syscall_64+0x3f/0x90 [ 31.798960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.799608] [ 31.799825] The buggy address belongs to the object at ffff888016648740 [ 31.799825] which belongs to the cache vm_area_struct of size 168 [ 31.801345] The buggy address is located 88 bytes inside of [ 31.801345] freed 168-byte region [ffff888016648740, ffff8880166487e8) [ 31.802757] [ 31.802976] The buggy address belongs to the physical page: [ 31.803635] page:0000000080eadc07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16648 [ 31.804757] memcg:ffff88800d746501 [ 31.805190] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.805848] page_type: 0xffffffff() [ 31.806297] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.807228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d746501 [ 31.808142] page dumped because: kasan: bad access detected [ 31.808834] [ 31.809052] Memory state around the buggy address: [ 31.809678] ffff888016648680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.810553] ffff888016648700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.811418] >ffff888016648780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.812276] ^ [ 31.812782] ffff888016648800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.813653] ffff888016648880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.814521] ================================================================== [ 31.815508] Disabling lock debugging due to kernel taint [ 34.490689] BUG: Bad rss-counter state mm:0000000059b0b2d8 type:MM_FILEPAGES val:33 [ 34.491603] BUG: Bad rss-counter state mm:0000000059b0b2d8 type:MM_ANONPAGES val:22 [ 35.029871] BUG: Bad rss-counter state mm:00000000d6327302 type:MM_FILEPAGES val:33 [ 35.031040] BUG: Bad rss-counter state mm:00000000d6327302 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41329' (ECDSA) to the list of known hosts. 2023/06/19 20:35:16 fuzzer started 2023/06/19 20:35:16 dialing manager at localhost:44161 2023/06/19 20:35:16 checking machine... 2023/06/19 20:35:17 checking revisions... [ 35.615890] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:35:17 testing simple program... [ 35.655375] cgroup: Unknown subsys name 'net' [ 35.702513] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:35:15 Registers: info registers vcpu 0 RAX=0000000000008234 RBX=00000000e6ecfddc RCX=ffffffff849f38d0 RDX=ffff888015953680 RSI=0000000000000003 RDI=0000000000000000 RBP=000000007133d38b RSP=ffff888017717658 R8 =0000000045639445 R9 =0000000021cbf3a7 R10=00000000ea2d04e1 R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2c00 R14=0000000000000007 R15=ffff888018d2bb3c RIP=ffffffff8219deff 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 00007f4690806700 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=00007fee58f4a9b0 CR3=0000000015b48000 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=2036313a35333a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007fffb7bc7da8 CR3=0000000015b48000 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=35333a3032203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036313a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000