syzkaller login: [ 44.106535] BUG: Bad rss-counter state mm:0000000078889cbb type:MM_FILEPAGES val:33 [ 44.107777] BUG: Bad rss-counter state mm:0000000078889cbb type:MM_ANONPAGES val:22 [ 44.258869] ================================================================== [ 44.259791] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.260735] Read of size 8 at addr ffff88800e099c20 by task sshd/220 [ 44.261502] [ 44.261723] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.262670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.263652] Call Trace: [ 44.263968] [ 44.264253] dump_stack_lvl+0x91/0xf0 [ 44.264747] print_report+0xcc/0x620 [ 44.265236] ? __virt_addr_valid+0x102/0x340 [ 44.265782] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.266402] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.267045] kasan_report+0xbe/0xf0 [ 44.267527] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.268152] vma_interval_tree_remove+0xc75/0xec0 [ 44.268762] vma_prepare+0xc54/0x11a0 [ 44.269246] __split_vma+0x5af/0x950 [ 44.269720] ? __pfx___split_vma+0x10/0x10 [ 44.270246] ? find_held_lock+0x2c/0x110 [ 44.270776] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.271347] ? lock_is_held_type+0x9f/0x120 [ 44.271882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.272493] ? mtree_range_walk+0x632/0x900 [ 44.273038] ? mas_walk+0x5c7/0x7c0 [ 44.273512] do_vmi_munmap+0x1f1/0x2b0 [ 44.274000] mmap_region+0x1f9/0x2660 [ 44.274491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.275030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.275744] ? __pfx_lock_acquire+0x10/0x10 [ 44.276278] ? __pfx_mmap_region+0x10/0x10 [ 44.276808] ? security_mmap_addr+0x7d/0xa0 [ 44.277337] ? get_unmapped_area+0x1f5/0x3f0 [ 44.277883] do_mmap+0x854/0xf00 [ 44.278321] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.278826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.279389] ksys_mmap_pgoff+0x3af/0x500 [ 44.279894] do_syscall_64+0x3f/0x90 [ 44.280371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.281021] RIP: 0033:0x7f2b0c75bd82 [ 44.281478] 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 [ 44.283600] RSP: 002b:00007fffff4ed178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.284500] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b0c75bd82 [ 44.285368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b0bb95000 [ 44.286220] RBP: 00007f2b0bb95000 R08: 0000000000000009 R09: 0000000000001000 [ 44.287087] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb56788b20 [ 44.287934] R13: 00007fffff4ed190 R14: 00007fffff4ed1c0 R15: 00007fffff4ed520 [ 44.288799] [ 44.289098] [ 44.289319] Allocated by task 213: [ 44.289746] kasan_save_stack+0x22/0x50 [ 44.290253] kasan_set_track+0x25/0x30 [ 44.290762] __kasan_slab_alloc+0x59/0x70 [ 44.291279] kmem_cache_alloc+0x16b/0x370 [ 44.291796] vm_area_dup+0x20/0x160 [ 44.292244] __split_vma+0x170/0x950 [ 44.292712] split_vma+0xc6/0x110 [ 44.293144] mprotect_fixup+0x8d2/0xb30 [ 44.293639] do_mprotect_pkey+0x87e/0xd40 [ 44.294169] __x64_sys_mprotect+0x78/0xc0 [ 44.294703] do_syscall_64+0x3f/0x90 [ 44.295173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.295810] [ 44.296024] Freed by task 213: [ 44.296423] kasan_save_stack+0x22/0x50 [ 44.296921] kasan_set_track+0x25/0x30 [ 44.297408] kasan_save_free_info+0x2b/0x50 [ 44.297936] __kasan_slab_free+0x10a/0x190 [ 44.298466] kmem_cache_free+0x10d/0x4d0 [ 44.298992] rcu_core+0x8c8/0x2860 [ 44.299435] __do_softirq+0x1b7/0x7d4 [ 44.299907] [ 44.300121] Last potentially related work creation: [ 44.300706] kasan_save_stack+0x22/0x50 [ 44.301209] __kasan_record_aux_stack+0x8e/0xa0 [ 44.301783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.302423] remove_vma+0x139/0x170 [ 44.302878] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.303429] do_vmi_munmap+0x1f1/0x2b0 [ 44.303918] __vm_munmap+0x138/0x3a0 [ 44.304383] __x64_sys_munmap+0x59/0x80 [ 44.304879] do_syscall_64+0x3f/0x90 [ 44.305351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.305997] [ 44.306212] The buggy address belongs to the object at ffff88800e099bc8 [ 44.306212] which belongs to the cache vm_area_struct of size 168 [ 44.307689] The buggy address is located 88 bytes inside of [ 44.307689] freed 168-byte region [ffff88800e099bc8, ffff88800e099c70) [ 44.309097] [ 44.309312] The buggy address belongs to the physical page: [ 44.309973] page:000000000e0dda07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe099 [ 44.311077] memcg:ffff88800dfb2101 [ 44.311508] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.312153] page_type: 0xffffffff() [ 44.312608] raw: 0100000000000200 ffff88800879fc80 ffffea0000382bc0 dead000000000004 [ 44.313531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfb2101 [ 44.314440] page dumped because: kasan: bad access detected [ 44.315102] [ 44.315317] Memory state around the buggy address: [ 44.315902] ffff88800e099b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.316757] ffff88800e099b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.317616] >ffff88800e099c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.318468] ^ [ 44.319011] ffff88800e099c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 44.319858] ffff88800e099d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 44.320716] ================================================================== [ 44.321762] Disabling lock debugging due to kernel taint [ 46.314285] BUG: Bad rss-counter state mm:00000000ea170c87 type:MM_FILEPAGES val:33 [ 46.315515] BUG: Bad rss-counter state mm:00000000ea170c87 type:MM_ANONPAGES val:22 [ 46.891797] BUG: Bad rss-counter state mm:0000000029293200 type:MM_FILEPAGES val:33 [ 46.892966] BUG: Bad rss-counter state mm:0000000029293200 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47417' (ECDSA) to the list of known hosts. 2023/06/19 14:18:09 fuzzer started 2023/06/19 14:18:09 dialing manager at localhost:44161 2023/06/19 14:18:09 checking machine... 2023/06/19 14:18:09 checking revisions... [ 47.527156] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:18:09 testing simple program... [ 47.571111] cgroup: Unknown subsys name 'net' [ 47.613054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:18:03 Registers: info registers vcpu 0 RAX=1ffffffff0c09b9b RBX=ffffffff8604dcd8 RCX=ffffffff8450b05d RDX=0000000000000000 RSI=ffffffff864b1140 RDI=ffffffff8604dccc RBP=ffffffff8604dccc RSP=ffff88806ce099e0 R8 =ffffffff864b1140 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffffffff8604dce8 R13=ffffffff8604dccc R14=ffffffff8604dccc R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f6e64949900 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=00007ffd8ba42000 CR3=000000000e17e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f6ee1d2b8d0 CR3=0000000009e4a000 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=2038303a38313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a38313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000