syzkaller login: [ 31.263481] BUG: Bad rss-counter state mm:0000000046a6a6eb type:MM_FILEPAGES val:33 [ 31.264688] BUG: Bad rss-counter state mm:0000000046a6a6eb type:MM_ANONPAGES val:22 [ 31.392075] ================================================================== [ 31.392767] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.393477] Read of size 8 at addr ffff888019e65228 by task sshd/220 [ 31.394065] [ 31.394230] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.394886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.395735] Call Trace: [ 31.395975] [ 31.396192] dump_stack_lvl+0x91/0xf0 [ 31.396565] print_report+0xcc/0x620 [ 31.396928] ? __virt_addr_valid+0x102/0x340 [ 31.397371] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.397834] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398318] kasan_report+0xbe/0xf0 [ 31.398682] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.399158] vma_interval_tree_remove+0xc75/0xec0 [ 31.399542] vma_prepare+0xc54/0x11a0 [ 31.399816] __split_vma+0x5af/0x950 [ 31.400084] ? __pfx___split_vma+0x10/0x10 [ 31.400388] ? find_held_lock+0x2c/0x110 [ 31.400687] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.401012] ? lock_is_held_type+0x9f/0x120 [ 31.401335] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.401704] ? mtree_range_walk+0x632/0x900 [ 31.402038] ? mas_walk+0x5c7/0x7c0 [ 31.402331] do_vmi_munmap+0x1f1/0x2b0 [ 31.402634] mmap_region+0x1f9/0x2660 [ 31.402933] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.403252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.403678] ? __pfx_lock_acquire+0x10/0x10 [ 31.403999] ? __pfx_mmap_region+0x10/0x10 [ 31.404324] ? security_mmap_addr+0x7d/0xa0 [ 31.404647] ? get_unmapped_area+0x1f5/0x3f0 [ 31.404980] do_mmap+0x854/0xf00 [ 31.405244] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.405550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.405895] ksys_mmap_pgoff+0x3af/0x500 [ 31.406207] do_syscall_64+0x3f/0x90 [ 31.406512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.406906] RIP: 0033:0x7faae37bbd82 [ 31.407189] 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 [ 31.408499] RSP: 002b:00007ffe2ebb7d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.409054] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faae37bbd82 [ 31.409574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faae2bf5000 [ 31.410090] RBP: 00007faae2bf5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.410619] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559af8d74d90 [ 31.411137] R13: 00007ffe2ebb7d20 R14: 00007ffe2ebb7d50 R15: 00007ffe2ebb80b0 [ 31.411656] [ 31.411832] [ 31.411966] Allocated by task 213: [ 31.412229] kasan_save_stack+0x22/0x50 [ 31.412533] kasan_set_track+0x25/0x30 [ 31.412838] __kasan_slab_alloc+0x59/0x70 [ 31.413156] kmem_cache_alloc+0x16b/0x370 [ 31.413465] vm_area_dup+0x20/0x160 [ 31.413745] __split_vma+0x170/0x950 [ 31.414030] split_vma+0xc6/0x110 [ 31.414303] mprotect_fixup+0x8d2/0xb30 [ 31.414604] do_mprotect_pkey+0x87e/0xd40 [ 31.414923] __x64_sys_mprotect+0x78/0xc0 [ 31.415244] do_syscall_64+0x3f/0x90 [ 31.415532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415918] [ 31.416048] Freed by task 19: [ 31.416286] kasan_save_stack+0x22/0x50 [ 31.416588] kasan_set_track+0x25/0x30 [ 31.416884] kasan_save_free_info+0x2b/0x50 [ 31.417207] __kasan_slab_free+0x10a/0x190 [ 31.417527] kmem_cache_free+0x10d/0x4d0 [ 31.417833] rcu_core+0x8c8/0x2860 [ 31.418106] __do_softirq+0x1b7/0x7d4 [ 31.418414] [ 31.418546] Last potentially related work creation: [ 31.418902] kasan_save_stack+0x22/0x50 [ 31.419205] __kasan_record_aux_stack+0x8e/0xa0 [ 31.419554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.419949] remove_vma+0x139/0x170 [ 31.420223] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.420571] do_vmi_munmap+0x1f1/0x2b0 [ 31.420871] __vm_munmap+0x138/0x3a0 [ 31.421162] __x64_sys_munmap+0x59/0x80 [ 31.421466] do_syscall_64+0x3f/0x90 [ 31.421757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.422155] [ 31.422291] The buggy address belongs to the object at ffff888019e651d0 [ 31.422291] which belongs to the cache vm_area_struct of size 168 [ 31.423179] The buggy address is located 88 bytes inside of [ 31.423179] freed 168-byte region [ffff888019e651d0, ffff888019e65278) [ 31.424046] [ 31.424175] The buggy address belongs to the physical page: [ 31.424579] page:00000000ba52d174 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e65 [ 31.425249] memcg:ffff88800c722301 [ 31.425508] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.425905] page_type: 0xffffffff() [ 31.426181] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.426742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c722301 [ 31.427298] page dumped because: kasan: bad access detected [ 31.427704] [ 31.427831] Memory state around the buggy address: [ 31.428187] ffff888019e65100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.428712] ffff888019e65180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.429239] >ffff888019e65200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.429755] ^ [ 31.430090] ffff888019e65280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.430622] ffff888019e65300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.431146] ================================================================== [ 31.431814] Disabling lock debugging due to kernel taint [ 33.007830] BUG: Bad rss-counter state mm:00000000037f75f3 type:MM_FILEPAGES val:33 [ 33.009218] BUG: Bad rss-counter state mm:00000000037f75f3 type:MM_ANONPAGES val:22 [ 33.422391] BUG: Bad rss-counter state mm:000000002957d915 type:MM_FILEPAGES val:33 [ 33.423444] BUG: Bad rss-counter state mm:000000002957d915 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63527' (ECDSA) to the list of known hosts. 2023/06/20 05:29:42 fuzzer started 2023/06/20 05:29:42 dialing manager at localhost:44161 2023/06/20 05:29:42 checking machine... 2023/06/20 05:29:42 checking revisions... [ 34.133220] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:29:42 testing simple program... [ 34.186543] cgroup: Unknown subsys name 'net' [ 34.234235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f247a14f650 CR3=000000000f716000 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=39323a3530203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732032343a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363234 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc12c6 RBX=ffffffff85e09634 RCX=ffffffff818c86c0 RDX=0000000000000000 RSI=ffffffff8614a732 RDI=ffffffff85e09618 RBP=ffffffff85e0962c RSP=ffff8880147f7318 R8 =ffffffff8614a732 R9 =ffff8880147f7410 R10=0000000000038001 R11=0000000000024091 R12=ffffffff85e0963c R13=ffffffff85e09618 R14=ffffffff85e09628 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007ff3bf58c900 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=00007ff3be9b5d80 CR3=0000000009670000 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=90782fb9a68aaf9100000000000ae988 XMM05=b18c4d50a017d35200000000001347f8 XMM06=e4cb8bb95a7664b600000000001336e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000