syzkaller login: [ 31.436690] BUG: Bad rss-counter state mm:00000000edd71e6f type:MM_FILEPAGES val:33 [ 31.437733] BUG: Bad rss-counter state mm:00000000edd71e6f type:MM_ANONPAGES val:22 [ 31.609112] ================================================================== [ 31.610009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.610942] Read of size 8 at addr ffff88801a25b798 by task sshd/221 [ 31.611702] [ 31.611919] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.612968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.613947] Call Trace: [ 31.614266] [ 31.614551] dump_stack_lvl+0x91/0xf0 [ 31.615077] print_report+0xcc/0x620 [ 31.615562] ? __virt_addr_valid+0x102/0x340 [ 31.616139] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.617373] kasan_report+0xbe/0xf0 [ 31.617849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.618477] vma_interval_tree_remove+0xc75/0xec0 [ 31.619081] vma_prepare+0xc54/0x11a0 [ 31.619557] __split_vma+0x5af/0x950 [ 31.620035] ? __pfx___split_vma+0x10/0x10 [ 31.620561] ? find_held_lock+0x2c/0x110 [ 31.621086] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.621653] ? lock_is_held_type+0x9f/0x120 [ 31.622191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.622798] ? mtree_range_walk+0x632/0x900 [ 31.623357] ? mas_walk+0x5c7/0x7c0 [ 31.623836] do_vmi_munmap+0x1f1/0x2b0 [ 31.624353] mmap_region+0x1f9/0x2660 [ 31.624833] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.625344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.626057] ? __pfx_lock_acquire+0x10/0x10 [ 31.626593] ? __pfx_mmap_region+0x10/0x10 [ 31.627123] ? security_mmap_addr+0x7d/0xa0 [ 31.627648] ? get_unmapped_area+0x1f5/0x3f0 [ 31.628198] do_mmap+0x854/0xf00 [ 31.628639] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.629134] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.629705] ksys_mmap_pgoff+0x3af/0x500 [ 31.630207] do_syscall_64+0x3f/0x90 [ 31.630685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.631328] RIP: 0033:0x7f57bc96ed82 [ 31.631777] 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 [ 31.633914] RSP: 002b:00007ffec5ee6a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.634818] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57bc96ed82 [ 31.635665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57bbda8000 [ 31.636529] RBP: 00007f57bbda8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.637379] R10: 0000000000000812 R11: 0000000000000206 R12: 000055954da38ec0 [ 31.638229] R13: 00007ffec5ee6a70 R14: 00007ffec5ee6aa0 R15: 00007ffec5ee6e00 [ 31.639094] [ 31.639388] [ 31.639605] Allocated by task 214: [ 31.640041] kasan_save_stack+0x22/0x50 [ 31.640548] kasan_set_track+0x25/0x30 [ 31.641039] __kasan_slab_alloc+0x59/0x70 [ 31.641565] kmem_cache_alloc+0x16b/0x370 [ 31.642082] vm_area_dup+0x20/0x160 [ 31.642537] __split_vma+0x170/0x950 [ 31.642997] split_vma+0xc6/0x110 [ 31.643448] mprotect_fixup+0x8d2/0xb30 [ 31.643960] do_mprotect_pkey+0x87e/0xd40 [ 31.644504] __x64_sys_mprotect+0x78/0xc0 [ 31.645022] do_syscall_64+0x3f/0x90 [ 31.645496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.646153] [ 31.646368] Freed by task 214: [ 31.646761] kasan_save_stack+0x22/0x50 [ 31.647264] kasan_set_track+0x25/0x30 [ 31.647765] kasan_save_free_info+0x2b/0x50 [ 31.648307] __kasan_slab_free+0x10a/0x190 [ 31.648845] kmem_cache_free+0x10d/0x4d0 [ 31.649354] rcu_core+0x8c8/0x2860 [ 31.649797] __do_softirq+0x1b7/0x7d4 [ 31.650273] [ 31.650489] Last potentially related work creation: [ 31.651075] kasan_save_stack+0x22/0x50 [ 31.651579] __kasan_record_aux_stack+0x8e/0xa0 [ 31.652165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.652810] remove_vma+0x139/0x170 [ 31.653259] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.653876] do_vmi_munmap+0x1f1/0x2b0 [ 31.654367] __vm_munmap+0x138/0x3a0 [ 31.654828] __x64_sys_munmap+0x59/0x80 [ 31.655330] do_syscall_64+0x3f/0x90 [ 31.655803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.656450] [ 31.656665] Second to last potentially related work creation: [ 31.657350] kasan_save_stack+0x22/0x50 [ 31.657856] __kasan_record_aux_stack+0x8e/0xa0 [ 31.658430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.659080] remove_vma+0x139/0x170 [ 31.659533] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.660098] do_vmi_munmap+0x1f1/0x2b0 [ 31.660583] mmap_region+0x1f9/0x2660 [ 31.661060] do_mmap+0x854/0xf00 [ 31.661491] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.661979] ksys_mmap_pgoff+0x3af/0x500 [ 31.662481] do_syscall_64+0x3f/0x90 [ 31.662953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.663603] [ 31.663820] The buggy address belongs to the object at ffff88801a25b740 [ 31.663820] which belongs to the cache vm_area_struct of size 168 [ 31.665318] The buggy address is located 88 bytes inside of [ 31.665318] freed 168-byte region [ffff88801a25b740, ffff88801a25b7e8) [ 31.666709] [ 31.666921] The buggy address belongs to the physical page: [ 31.667575] page:000000004812d955 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a25b [ 31.668668] memcg:ffff88801a237401 [ 31.669092] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.669791] page_type: 0xffffffff() [ 31.670236] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.671149] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a237401 [ 31.672068] page dumped because: kasan: bad access detected [ 31.672718] [ 31.672936] Memory state around the buggy address: [ 31.673521] ffff88801a25b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.674377] ffff88801a25b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.675232] >ffff88801a25b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.676094] ^ [ 31.676593] ffff88801a25b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.677454] ffff88801a25b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.678304] ================================================================== [ 31.679230] Disabling lock debugging due to kernel taint [ 33.947456] BUG: Bad rss-counter state mm:000000004bc64732 type:MM_FILEPAGES val:33 [ 33.948649] BUG: Bad rss-counter state mm:000000004bc64732 type:MM_ANONPAGES val:22 [ 34.508774] BUG: Bad rss-counter state mm:00000000a6b1df2d type:MM_FILEPAGES val:33 [ 34.509973] BUG: Bad rss-counter state mm:00000000a6b1df2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26152' (ECDSA) to the list of known hosts. 2023/06/20 15:34:02 fuzzer started 2023/06/20 15:34:02 dialing manager at localhost:36067 2023/06/20 15:34:02 checking machine... 2023/06/20 15:34:02 checking revisions... [ 35.130491] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:34:02 testing simple program... [ 35.183840] cgroup: Unknown subsys name 'net' [ 35.222085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:34:02 Registers: info registers vcpu 0 RAX=0000000000006097 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000006098 RSI=000000000000132f RDI=ffffffff86098098 RBP=ffff888015c17578 RSP=ffff888015c17460 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888015c17580 R13=ffff888015c17568 R14=ffff888015c17561 R15=ffff888015c17520 RIP=ffffffff81130861 RFL=00000293 [--S-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 00007fe0d5fdf900 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=00007fe0d53d89e0 CR3=000000000cb0a000 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=00000000000000000000000000000000 XMM01=db8fb0e65f4156860c4d39febf356f91 XMM02=000000000011b168d59e07bde36eea69 XMM03=000000000011b290ec2efd57dc4c00df XMM04=9c199f0f52b83a0900000000000ae988 XMM05=cada94cfef8b137300000000001349d0 XMM06=e4cb8bb95a7664b60000000000133868 XMM07=fb795ef6d657705600000000001226e8 XMM08=2c67c8bc2e329bc3000000000011b290 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000007 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888016ecf8e0 R8 =ffffffff8608a556 R9 =ffff888016ecfa28 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000287 [--S--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 00007f05ec00d900 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=00007ffc91854ff8 CR3=0000000016b1c000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000