syzkaller login: [ 82.947500] BUG: Bad rss-counter state mm:00000000c4ffd8b1 type:MM_FILEPAGES val:33 [ 82.948551] BUG: Bad rss-counter state mm:00000000c4ffd8b1 type:MM_ANONPAGES val:22 [ 83.056277] ================================================================== [ 83.057347] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 83.058480] Read of size 8 at addr ffff88800e73d058 by task sshd/220 [ 83.059551] [ 83.059811] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 83.061029] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 83.062225] Call Trace: [ 83.062407] [ 83.062563] dump_stack_lvl+0x91/0xf0 [ 83.062832] print_report+0xcc/0x620 [ 83.063094] ? __virt_addr_valid+0x102/0x340 [ 83.063398] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.063734] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.064075] kasan_report+0xbe/0xf0 [ 83.064337] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.064676] vma_interval_tree_remove+0xc75/0xec0 [ 83.065009] vma_prepare+0xc54/0x11a0 [ 83.065277] __split_vma+0x5af/0x950 [ 83.065537] ? __pfx___split_vma+0x10/0x10 [ 83.065833] ? find_held_lock+0x2c/0x110 [ 83.066116] do_vmi_align_munmap+0x2ba/0x11f0 [ 83.066426] ? lock_is_held_type+0x9f/0x120 [ 83.066720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 83.067054] ? mtree_range_walk+0x632/0x900 [ 83.067353] ? mas_walk+0x5c7/0x7c0 [ 83.067613] do_vmi_munmap+0x1f1/0x2b0 [ 83.067882] mmap_region+0x1f9/0x2660 [ 83.068142] ? vm_mmap_pgoff+0x15c/0x3a0 [ 83.068420] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 83.068832] ? __pfx_lock_acquire+0x10/0x10 [ 83.069126] ? __pfx_mmap_region+0x10/0x10 [ 83.069412] ? security_mmap_addr+0x7d/0xa0 [ 83.069705] ? get_unmapped_area+0x1f5/0x3f0 [ 83.070006] do_mmap+0x854/0xf00 [ 83.070248] vm_mmap_pgoff+0x1a6/0x3a0 [ 83.070516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 83.070819] ksys_mmap_pgoff+0x3af/0x500 [ 83.071093] do_syscall_64+0x3f/0x90 [ 83.071354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.071711] RIP: 0033:0x7f1afad03d82 [ 83.071962] 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 [ 83.073126] RSP: 002b:00007ffee173ae58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 83.073618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1afad03d82 [ 83.074091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1afa13d000 [ 83.074558] RBP: 00007f1afa13d000 R08: 0000000000000009 R09: 0000000000001000 [ 83.075018] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d85a05ff70 [ 83.075482] R13: 00007ffee173ae70 R14: 00007ffee173aea0 R15: 00007ffee173b200 [ 83.075946] [ 83.076104] [ 83.076222] Allocated by task 213: [ 83.076454] kasan_save_stack+0x22/0x50 [ 83.076728] kasan_set_track+0x25/0x30 [ 83.077000] __kasan_slab_alloc+0x59/0x70 [ 83.077287] kmem_cache_alloc+0x16b/0x370 [ 83.077567] vm_area_dup+0x20/0x160 [ 83.077824] __split_vma+0x170/0x950 [ 83.078075] split_vma+0xc6/0x110 [ 83.078313] mprotect_fixup+0x8d2/0xb30 [ 83.078585] do_mprotect_pkey+0x87e/0xd40 [ 83.078869] __x64_sys_mprotect+0x78/0xc0 [ 83.079155] do_syscall_64+0x3f/0x90 [ 83.079416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.079763] [ 83.079879] Freed by task 203: [ 83.080094] kasan_save_stack+0x22/0x50 [ 83.080368] kasan_set_track+0x25/0x30 [ 83.080635] kasan_save_free_info+0x2b/0x50 [ 83.080926] __kasan_slab_free+0x10a/0x190 [ 83.081212] kmem_cache_free+0x10d/0x4d0 [ 83.081485] rcu_core+0x8c8/0x2860 [ 83.081732] __do_softirq+0x1b7/0x7d4 [ 83.081991] [ 83.082110] Last potentially related work creation: [ 83.082430] kasan_save_stack+0x22/0x50 [ 83.082705] __kasan_record_aux_stack+0x8e/0xa0 [ 83.083018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 83.083368] remove_vma+0x139/0x170 [ 83.083622] do_vmi_align_munmap+0xd4a/0x11f0 [ 83.083929] do_vmi_munmap+0x1f1/0x2b0 [ 83.084192] __vm_munmap+0x138/0x3a0 [ 83.084446] __x64_sys_munmap+0x59/0x80 [ 83.084715] do_syscall_64+0x3f/0x90 [ 83.084972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.085322] [ 83.085441] The buggy address belongs to the object at ffff88800e73d000 [ 83.085441] which belongs to the cache vm_area_struct of size 168 [ 83.086261] The buggy address is located 88 bytes inside of [ 83.086261] freed 168-byte region [ffff88800e73d000, ffff88800e73d0a8) [ 83.087020] [ 83.087142] The buggy address belongs to the physical page: [ 83.087504] page:0000000043480e11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe73d [ 83.088094] memcg:ffff88800ee45601 [ 83.088324] flags: 0x100000000000200(slab|node=0|zone=1) [ 83.088677] page_type: 0xffffffff() [ 83.088925] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 83.089428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee45601 [ 83.089934] page dumped because: kasan: bad access detected [ 83.090297] [ 83.090414] Memory state around the buggy address: [ 83.090729] ffff88800e73cf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 83.091191] ffff88800e73cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 83.091661] >ffff88800e73d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.092128] ^ [ 83.092519] ffff88800e73d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 83.092980] ffff88800e73d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 83.093440] ================================================================== [ 83.093959] Disabling lock debugging due to kernel taint [ 85.844248] BUG: Bad rss-counter state mm:0000000058f418ac type:MM_FILEPAGES val:33 [ 85.845869] BUG: Bad rss-counter state mm:0000000058f418ac type:MM_ANONPAGES val:22 [ 86.409767] BUG: Bad rss-counter state mm:0000000044341d59 type:MM_FILEPAGES val:33 [ 86.410936] BUG: Bad rss-counter state mm:0000000044341d59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64581' (ECDSA) to the list of known hosts. 2023/06/19 13:26:39 fuzzer started 2023/06/19 13:26:39 dialing manager at localhost:44161 2023/06/19 13:26:39 checking machine... 2023/06/19 13:26:39 checking revisions... [ 87.041466] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:26:39 testing simple program... [ 87.090754] cgroup: Unknown subsys name 'net' [ 87.162663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:25:46 Registers: info registers vcpu 0 RAX=1ffffffff0c26e01 RBX=0000000000000001 RCX=ffffffff86137004 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888008d7f9e0 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff86137008 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7fd48 R15=ffff888008d7f978 RIP=ffffffff81131118 RFL=00000212 [----A--] 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 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=00007f78b59140b0 CR3=000000000db2e000 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=00007fbac4b11970 CR3=0000000013ae6000 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=b897811cb39f129cf04d616bd7df4033 XMM02=ec2efd57dc4c00df00000000001215e8 XMM03=d08efd5d4c9b17d200000000001216b8 XMM04=a17bcb4f932ab61c00000000000ae988 XMM05=0d6a63c8509fc70e0000000000139728 XMM06=4fda316b135da52b00000000001387c8 XMM07=e042d86d42eb936e0000000000128978 XMM08=d08efd5d4c9b17d200000000001216b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000