syzkaller login: [ 31.564968] BUG: Bad rss-counter state mm:0000000033ba87ff type:MM_FILEPAGES val:33 [ 31.565989] BUG: Bad rss-counter state mm:0000000033ba87ff type:MM_ANONPAGES val:22 [ 31.727297] ================================================================== [ 31.728221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.729171] Read of size 8 at addr ffff888015b733f8 by task sshd/221 [ 31.729952] [ 31.730169] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.731142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.732140] Call Trace: [ 31.732470] [ 31.732760] dump_stack_lvl+0x91/0xf0 [ 31.733281] print_report+0xcc/0x620 [ 31.733771] ? __virt_addr_valid+0x102/0x340 [ 31.734324] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.734948] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.735571] kasan_report+0xbe/0xf0 [ 31.736052] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.736670] vma_interval_tree_remove+0xc75/0xec0 [ 31.737281] vma_prepare+0xc54/0x11a0 [ 31.737767] __split_vma+0x5af/0x950 [ 31.738243] ? __pfx___split_vma+0x10/0x10 [ 31.738777] ? find_held_lock+0x2c/0x110 [ 31.739294] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.739861] ? lock_is_held_type+0x9f/0x120 [ 31.740404] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.741021] ? mtree_range_walk+0x632/0x900 [ 31.741600] ? mas_walk+0x5c7/0x7c0 [ 31.742079] do_vmi_munmap+0x1f1/0x2b0 [ 31.742579] mmap_region+0x1f9/0x2660 [ 31.743068] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.743583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.744308] ? __pfx_lock_acquire+0x10/0x10 [ 31.744852] ? __pfx_mmap_region+0x10/0x10 [ 31.745407] ? security_mmap_addr+0x7d/0xa0 [ 31.745945] ? get_unmapped_area+0x1f5/0x3f0 [ 31.746497] do_mmap+0x854/0xf00 [ 31.746944] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.747441] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.748017] ksys_mmap_pgoff+0x3af/0x500 [ 31.748534] do_syscall_64+0x3f/0x90 [ 31.749012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.749672] RIP: 0033:0x7fe437696d82 [ 31.750132] 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 [ 31.752260] RSP: 002b:00007ffd0832af68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.753199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe437696d82 [ 31.754062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe436ad0000 [ 31.754919] RBP: 00007fe436ad0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.755770] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641c3397980 [ 31.756619] R13: 00007ffd0832af80 R14: 00007ffd0832afb0 R15: 00007ffd0832b310 [ 31.757485] [ 31.757778] [ 31.757994] Allocated by task 214: [ 31.758421] kasan_save_stack+0x22/0x50 [ 31.758927] kasan_set_track+0x25/0x30 [ 31.759424] __kasan_slab_alloc+0x59/0x70 [ 31.759947] kmem_cache_alloc+0x16b/0x370 [ 31.760473] vm_area_dup+0x20/0x160 [ 31.760931] __split_vma+0x170/0x950 [ 31.761424] split_vma+0xc6/0x110 [ 31.761869] mprotect_fixup+0x8d2/0xb30 [ 31.762373] do_mprotect_pkey+0x87e/0xd40 [ 31.762896] __x64_sys_mprotect+0x78/0xc0 [ 31.763423] do_syscall_64+0x3f/0x90 [ 31.763905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.764546] [ 31.764762] Freed by task 214: [ 31.765164] kasan_save_stack+0x22/0x50 [ 31.765674] kasan_set_track+0x25/0x30 [ 31.766172] kasan_save_free_info+0x2b/0x50 [ 31.766711] __kasan_slab_free+0x10a/0x190 [ 31.767258] kmem_cache_free+0x10d/0x4d0 [ 31.767766] rcu_core+0x8c8/0x2860 [ 31.768216] __do_softirq+0x1b7/0x7d4 [ 31.768694] [ 31.768908] Last potentially related work creation: [ 31.769505] kasan_save_stack+0x22/0x50 [ 31.770006] __kasan_record_aux_stack+0x8e/0xa0 [ 31.770585] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.771236] remove_vma+0x139/0x170 [ 31.771691] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.772242] do_vmi_munmap+0x1f1/0x2b0 [ 31.772730] __vm_munmap+0x138/0x3a0 [ 31.773209] __x64_sys_munmap+0x59/0x80 [ 31.773708] do_syscall_64+0x3f/0x90 [ 31.774187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.774832] [ 31.775048] The buggy address belongs to the object at ffff888015b733a0 [ 31.775048] which belongs to the cache vm_area_struct of size 168 [ 31.776503] The buggy address is located 88 bytes inside of [ 31.776503] freed 168-byte region [ffff888015b733a0, ffff888015b73448) [ 31.777927] [ 31.778144] The buggy address belongs to the physical page: [ 31.778803] page:000000005647e52c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b73 [ 31.779898] memcg:ffff888019433201 [ 31.780324] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.781019] page_type: 0xffffffff() [ 31.781487] raw: 0100000000000200 ffff88800879fc80 ffffea00003aa7c0 dead00000000000d [ 31.782406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019433201 [ 31.783308] page dumped because: kasan: bad access detected [ 31.783961] [ 31.784178] Memory state around the buggy address: [ 31.784762] ffff888015b73280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.785620] ffff888015b73300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.786473] >ffff888015b73380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.787316] ^ [ 31.788159] ffff888015b73400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.789008] ffff888015b73480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.789880] ================================================================== [ 31.790846] Disabling lock debugging due to kernel taint [ 34.063048] BUG: Bad rss-counter state mm:0000000007dc762f type:MM_FILEPAGES val:33 [ 34.064053] BUG: Bad rss-counter state mm:0000000007dc762f type:MM_ANONPAGES val:22 [ 34.584553] BUG: Bad rss-counter state mm:0000000014cd9e9b type:MM_FILEPAGES val:33 [ 34.585741] BUG: Bad rss-counter state mm:0000000014cd9e9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17515' (ECDSA) to the list of known hosts. 2023/06/19 20:59:35 fuzzer started 2023/06/19 20:59:35 dialing manager at localhost:44161 2023/06/19 20:59:35 checking machine... 2023/06/19 20:59:35 checking revisions... [ 35.223711] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:59:35 testing simple program... [ 35.269178] cgroup: Unknown subsys name 'net' [ 35.321380] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:59:34 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812943e6 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806ce09cb0 RSP=ffff88806ce09c18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806ce395c0 R13=00000000000002b9 R14=000000000000b937 R15=00000000000f2800 RIP=ffffffff8135b8e4 RFL=00000047 [---Z-PC] 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 00007fead52cb900 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=00007fead46bd8d0 CR3=000000000cb4c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c4637d344de98a0d00000000000ae988 XMM05=4a7c11b064a38bbf0000000000135c58 XMM06=c291bd5c70af25b90000000000134a48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf46ef RBX=ffffffff85fa377c RCX=ffffffff8363c1b0 RDX=0000000000000000 RSI=ffffffff863b192a RDI=ffffffff85fa3768 RBP=ffffffff85fa3768 RSP=ffff88801ca479c8 R8 =ffffffff863b192a R9 =ffff88801ca47ac0 R10=0000000000038001 R11=000000000008a8e5 R12=ffffffff85fa3794 R13=ffffffff85fa3768 R14=ffffffff85fa3768 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007fde05ef4900 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=00007ffeac8f1000 CR3=0000000019780000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000