syzkaller login: [ 34.251575] BUG: Bad rss-counter state mm:000000001a5500f6 type:MM_FILEPAGES val:33 [ 34.253386] BUG: Bad rss-counter state mm:000000001a5500f6 type:MM_ANONPAGES val:22 [ 34.475298] ================================================================== [ 34.476379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.477513] Read of size 8 at addr ffff88800dc045c8 by task sshd/221 [ 34.478555] [ 34.478818] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.479861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.480843] Call Trace: [ 34.481160] [ 34.481451] dump_stack_lvl+0x91/0xf0 [ 34.481943] print_report+0xcc/0x620 [ 34.482435] ? __virt_addr_valid+0x102/0x340 [ 34.482994] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.483615] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.484233] kasan_report+0xbe/0xf0 [ 34.484709] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.485330] vma_interval_tree_remove+0xc75/0xec0 [ 34.485938] vma_prepare+0xc54/0x11a0 [ 34.486413] __split_vma+0x5af/0x950 [ 34.486888] ? __pfx___split_vma+0x10/0x10 [ 34.487427] ? find_held_lock+0x2c/0x110 [ 34.487951] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.488520] ? lock_is_held_type+0x9f/0x120 [ 34.489057] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.489656] ? mtree_range_walk+0x632/0x900 [ 34.490205] ? mas_walk+0x5c7/0x7c0 [ 34.490674] do_vmi_munmap+0x1f1/0x2b0 [ 34.491166] mmap_region+0x1f9/0x2660 [ 34.491671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.492183] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.492889] ? __pfx_lock_acquire+0x10/0x10 [ 34.493420] ? __pfx_mmap_region+0x10/0x10 [ 34.493946] ? security_mmap_addr+0x7d/0xa0 [ 34.494479] ? get_unmapped_area+0x1f5/0x3f0 [ 34.495028] do_mmap+0x854/0xf00 [ 34.495479] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.495974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.496531] ksys_mmap_pgoff+0x3af/0x500 [ 34.497039] do_syscall_64+0x3f/0x90 [ 34.497511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.498160] RIP: 0033:0x7ff336ee0d82 [ 34.498614] 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 [ 34.500728] RSP: 002b:00007ffd902c7e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.501627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff336ee0d82 [ 34.502479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff33631a000 [ 34.503350] RBP: 00007ff33631a000 R08: 0000000000000009 R09: 0000000000001000 [ 34.504198] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582c5a04980 [ 34.505045] R13: 00007ffd902c7e70 R14: 00007ffd902c7ea0 R15: 00007ffd902c8200 [ 34.505913] [ 34.506202] [ 34.506415] Allocated by task 212: [ 34.506843] kasan_save_stack+0x22/0x50 [ 34.507355] kasan_set_track+0x25/0x30 [ 34.507850] __kasan_slab_alloc+0x59/0x70 [ 34.508372] kmem_cache_alloc+0x16b/0x370 [ 34.508888] vm_area_dup+0x20/0x160 [ 34.509337] __split_vma+0x170/0x950 [ 34.509795] split_vma+0xc6/0x110 [ 34.510234] mprotect_fixup+0x8d2/0xb30 [ 34.510739] do_mprotect_pkey+0x87e/0xd40 [ 34.511289] __x64_sys_mprotect+0x78/0xc0 [ 34.511822] do_syscall_64+0x3f/0x90 [ 34.512308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.512952] [ 34.513171] Freed by task 212: [ 34.513564] kasan_save_stack+0x22/0x50 [ 34.514067] kasan_set_track+0x25/0x30 [ 34.514563] kasan_save_free_info+0x2b/0x50 [ 34.515095] __kasan_slab_free+0x10a/0x190 [ 34.515638] kmem_cache_free+0x10d/0x4d0 [ 34.516146] rcu_core+0x8c8/0x2860 [ 34.516592] __do_softirq+0x1b7/0x7d4 [ 34.517071] [ 34.517288] Last potentially related work creation: [ 34.517875] kasan_save_stack+0x22/0x50 [ 34.518379] __kasan_record_aux_stack+0x8e/0xa0 [ 34.518953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.519605] remove_vma+0x139/0x170 [ 34.520056] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.520636] do_vmi_munmap+0x1f1/0x2b0 [ 34.521128] __vm_munmap+0x138/0x3a0 [ 34.521593] __x64_sys_munmap+0x59/0x80 [ 34.522090] do_syscall_64+0x3f/0x90 [ 34.522567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.523217] [ 34.523433] The buggy address belongs to the object at ffff88800dc04570 [ 34.523433] which belongs to the cache vm_area_struct of size 168 [ 34.524898] The buggy address is located 88 bytes inside of [ 34.524898] freed 168-byte region [ffff88800dc04570, ffff88800dc04618) [ 34.526311] [ 34.526530] The buggy address belongs to the physical page: [ 34.527209] page:0000000050ff6ad6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc04 [ 34.528297] memcg:ffff88800cbd7701 [ 34.528732] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.529427] page_type: 0xffffffff() [ 34.529878] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.530794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbd7701 [ 34.531708] page dumped because: kasan: bad access detected [ 34.532369] [ 34.532585] Memory state around the buggy address: [ 34.533157] ffff88800dc04480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.534032] ffff88800dc04500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 34.534915] >ffff88800dc04580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.535764] ^ [ 34.536458] ffff88800dc04600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 34.537317] ffff88800dc04680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.538217] ================================================================== [ 34.539405] Disabling lock debugging due to kernel taint [ 36.605764] BUG: Bad rss-counter state mm:0000000039e8f766 type:MM_FILEPAGES val:33 [ 36.606920] BUG: Bad rss-counter state mm:0000000039e8f766 type:MM_ANONPAGES val:22 [ 37.159437] BUG: Bad rss-counter state mm:00000000a23ed271 type:MM_FILEPAGES val:33 [ 37.160619] BUG: Bad rss-counter state mm:00000000a23ed271 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54986' (ECDSA) to the list of known hosts. 2023/06/20 02:33:57 fuzzer started 2023/06/20 02:33:58 dialing manager at localhost:44161 2023/06/20 02:33:58 checking machine... 2023/06/20 02:33:58 checking revisions... [ 37.794715] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:33:58 testing simple program... [ 37.847039] cgroup: Unknown subsys name 'net' [ 37.906499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:53 Registers: info registers vcpu 0 RAX=000000002d593ee1 RBX=000000003eaff546 RCX=ffff88800fff7a60 RDX=0000000000000010 RSI=0000000000000008 RDI=000000009add1d8e RBP=ffff88800844f780 RSP=ffff88800fff7998 R8 =0000000099a3672a R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092c40 R14=ffff88800fff7a00 R15=0000000000000010 RIP=ffffffff82270eb2 RFL=00000202 [-------] 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 00007f9091ff5900 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=00007f90925ac618 CR3=000000000c460000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f6385dca7f0 CR3=0000000009034000 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=b23b7cef7022dbb6cc4beb3d4f17dc75 XMM02=2c67c8bc2e329bc3000000000011dfb8 XMM03=fb795ef6d65770560000000000124a08 XMM04=cff43534328793e900000000000ae988 XMM05=dfcdbad4f1609c3700000000001345a8 XMM06=3bc2760b03c17a7d0000000000133410 XMM07=e042d86d42eb936e0000000000124c88 XMM08=0a0e214349ce3e97000000000011e018 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000