syzkaller login: [ 34.251516] BUG: Bad rss-counter state mm:000000002f2406f4 type:MM_FILEPAGES val:33 [ 34.252686] BUG: Bad rss-counter state mm:000000002f2406f4 type:MM_ANONPAGES val:22 [ 34.295760] ================================================================== [ 34.296755] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.297781] Read of size 8 at addr ffff88801a659df0 by task sshd/219 [ 34.298922] [ 34.299157] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.300088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.301146] Call Trace: [ 34.301494] [ 34.301800] dump_stack_lvl+0x91/0xf0 [ 34.302334] print_report+0xcc/0x620 [ 34.302871] ? __virt_addr_valid+0x102/0x340 [ 34.303470] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.304149] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.304826] kasan_report+0xbe/0xf0 [ 34.305345] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.306021] vma_interval_tree_remove+0xc75/0xec0 [ 34.306711] vma_prepare+0xc54/0x11a0 [ 34.307240] __split_vma+0x5af/0x950 [ 34.307757] ? __pfx___split_vma+0x10/0x10 [ 34.308335] ? find_held_lock+0x2c/0x110 [ 34.308913] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.309530] ? lock_is_held_type+0x9f/0x120 [ 34.310113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.310784] ? mtree_range_walk+0x632/0x900 [ 34.311384] ? mas_walk+0x5c7/0x7c0 [ 34.311901] do_vmi_munmap+0x1f1/0x2b0 [ 34.312433] mmap_region+0x1f9/0x2660 [ 34.312960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.313512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.314289] ? __pfx_lock_acquire+0x10/0x10 [ 34.314895] ? __pfx_mmap_region+0x10/0x10 [ 34.315466] ? security_mmap_addr+0x7d/0xa0 [ 34.316046] ? get_unmapped_area+0x1f5/0x3f0 [ 34.316643] do_mmap+0x854/0xf00 [ 34.317122] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.317659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.318267] ksys_mmap_pgoff+0x3af/0x500 [ 34.318834] do_syscall_64+0x3f/0x90 [ 34.319354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.320057] RIP: 0033:0x7fa2dc1f7d82 [ 34.320548] 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 [ 34.322866] RSP: 002b:00007ffd293dfed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.323844] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2dc1f7d82 [ 34.324765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2db631000 [ 34.325684] RBP: 00007fa2db631000 R08: 0000000000000009 R09: 0000000000001000 [ 34.326616] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfa5b56b20 [ 34.327553] R13: 00007ffd293dfef0 R14: 00007ffd293dff20 R15: 00007ffd293e0280 [ 34.328513] [ 34.328837] [ 34.329078] Allocated by task 212: [ 34.329557] kasan_save_stack+0x22/0x50 [ 34.330122] kasan_set_track+0x25/0x30 [ 34.330686] __kasan_slab_alloc+0x59/0x70 [ 34.331274] kmem_cache_alloc+0x16b/0x370 [ 34.331849] vm_area_dup+0x20/0x160 [ 34.332352] __split_vma+0x170/0x950 [ 34.332869] split_vma+0xc6/0x110 [ 34.333356] mprotect_fixup+0x8d2/0xb30 [ 34.333913] do_mprotect_pkey+0x87e/0xd40 [ 34.334489] __x64_sys_mprotect+0x78/0xc0 [ 34.335079] do_syscall_64+0x3f/0x90 [ 34.335608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.336321] [ 34.336558] Freed by task 212: [ 34.337000] kasan_save_stack+0x22/0x50 [ 34.337557] kasan_set_track+0x25/0x30 [ 34.338105] kasan_save_free_info+0x2b/0x50 [ 34.338712] __kasan_slab_free+0x10a/0x190 [ 34.339315] kmem_cache_free+0x10d/0x4d0 [ 34.339881] rcu_core+0x8c8/0x2860 [ 34.340373] __do_softirq+0x1b7/0x7d4 [ 34.340905] [ 34.341147] Last potentially related work creation: [ 34.341800] kasan_save_stack+0x22/0x50 [ 34.342356] __kasan_record_aux_stack+0x8e/0xa0 [ 34.342997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.343729] remove_vma+0x139/0x170 [ 34.344229] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.344846] do_vmi_munmap+0x1f1/0x2b0 [ 34.345391] __vm_munmap+0x138/0x3a0 [ 34.345907] __x64_sys_munmap+0x59/0x80 [ 34.346451] do_syscall_64+0x3f/0x90 [ 34.346982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.347692] [ 34.347932] The buggy address belongs to the object at ffff88801a659d98 [ 34.347932] which belongs to the cache vm_area_struct of size 168 [ 34.349560] The buggy address is located 88 bytes inside of [ 34.349560] freed 168-byte region [ffff88801a659d98, ffff88801a659e40) [ 34.351121] [ 34.351350] The buggy address belongs to the physical page: [ 34.352059] page:000000001a1b34f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a659 [ 34.353232] memcg:ffff8880147dd201 [ 34.353683] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.354362] page_type: 0xffffffff() [ 34.354858] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.355850] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147dd201 [ 34.356824] page dumped because: kasan: bad access detected [ 34.357521] [ 34.357754] Memory state around the buggy address: [ 34.358375] ffff88801a659c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.359328] ffff88801a659d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.360234] >ffff88801a659d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.361143] ^ [ 34.362010] ffff88801a659e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.362926] ffff88801a659e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.363828] ================================================================== [ 34.365169] Disabling lock debugging due to kernel taint [ 36.300236] BUG: Bad rss-counter state mm:0000000080951dc5 type:MM_FILEPAGES val:33 [ 36.301242] BUG: Bad rss-counter state mm:0000000080951dc5 type:MM_ANONPAGES val:22 [ 36.864867] BUG: Bad rss-counter state mm:000000005a777017 type:MM_FILEPAGES val:33 [ 36.866045] BUG: Bad rss-counter state mm:000000005a777017 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8410' (ECDSA) to the list of known hosts. 2023/06/19 19:01:44 fuzzer started 2023/06/19 19:01:44 dialing manager at localhost:44161 2023/06/19 19:01:44 checking machine... 2023/06/19 19:01:44 checking revisions... [ 37.501145] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:44 testing simple program... [ 37.563247] cgroup: Unknown subsys name 'net' [ 37.602791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:40 Registers: info registers vcpu 0 RAX=1ffff11001d6bfdb RBX=ffff88800eb5fea8 RCX=1ffff1100199ca3a RDX=dffffc0000000000 RSI=ffff8880164bb340 RDI=ffff88800eb5fed8 RBP=ffff88800cce51a0 RSP=ffff88800fe5fcd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880164bae00 R13=0000000000000000 R14=ffff88800f0232a8 R15=ffff88800f023260 RIP=ffffffff818474fe RFL=00000046 [---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 00007fcbfcab4900 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=00007fcbfd06c0b0 CR3=0000000017e16000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f25af99c000 CR3=0000000019870000 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=2034343a31303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000