syzkaller login: [ 28.870887] BUG: Bad rss-counter state mm:00000000815150b7 type:MM_FILEPAGES val:33 [ 28.872426] BUG: Bad rss-counter state mm:00000000815150b7 type:MM_ANONPAGES val:22 [ 29.026355] ================================================================== [ 29.027316] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.028311] Read of size 8 at addr ffff88800f2203f8 by task sshd/221 [ 29.029246] [ 29.029493] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.030412] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.031547] Call Trace: [ 29.031967] [ 29.032298] dump_stack_lvl+0x91/0xf0 [ 29.032884] print_report+0xcc/0x620 [ 29.033451] ? __virt_addr_valid+0x102/0x340 [ 29.034093] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.034823] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.035546] kasan_report+0xbe/0xf0 [ 29.036113] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.036848] vma_interval_tree_remove+0xc75/0xec0 [ 29.037557] vma_prepare+0xc54/0x11a0 [ 29.038124] __split_vma+0x5af/0x950 [ 29.038676] ? __pfx___split_vma+0x10/0x10 [ 29.039295] ? find_held_lock+0x2c/0x110 [ 29.039917] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.040584] ? lock_is_held_type+0x9f/0x120 [ 29.041217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.041932] ? mtree_range_walk+0x632/0x900 [ 29.042610] ? mas_walk+0x5c7/0x7c0 [ 29.043188] do_vmi_munmap+0x1f1/0x2b0 [ 29.043832] mmap_region+0x1f9/0x2660 [ 29.044446] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.045014] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.045808] ? __pfx_lock_acquire+0x10/0x10 [ 29.046429] ? __pfx_mmap_region+0x10/0x10 [ 29.047014] ? security_mmap_addr+0x7d/0xa0 [ 29.047609] ? get_unmapped_area+0x1f5/0x3f0 [ 29.048230] do_mmap+0x854/0xf00 [ 29.048723] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.049272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.049890] ksys_mmap_pgoff+0x3af/0x500 [ 29.050451] do_syscall_64+0x3f/0x90 [ 29.050982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.051704] RIP: 0033:0x7fac9dd39d82 [ 29.052231] 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 [ 29.054596] RSP: 002b:00007fff63f30f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.055605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac9dd39d82 [ 29.056552] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac9d173000 [ 29.057502] RBP: 00007fac9d173000 R08: 0000000000000009 R09: 0000000000001000 [ 29.058440] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643e0babd90 [ 29.059392] R13: 00007fff63f30f50 R14: 00007fff63f30f80 R15: 00007fff63f312e0 [ 29.060386] [ 29.060815] [ 29.061130] Allocated by task 213: [ 29.061758] kasan_save_stack+0x22/0x50 [ 29.062501] kasan_set_track+0x25/0x30 [ 29.063226] __kasan_slab_alloc+0x59/0x70 [ 29.064022] kmem_cache_alloc+0x16b/0x370 [ 29.064782] vm_area_dup+0x20/0x160 [ 29.065445] __split_vma+0x170/0x950 [ 29.066124] split_vma+0xc6/0x110 [ 29.066620] mprotect_fixup+0x8d2/0xb30 [ 29.067204] do_mprotect_pkey+0x87e/0xd40 [ 29.067792] __x64_sys_mprotect+0x78/0xc0 [ 29.068404] do_syscall_64+0x3f/0x90 [ 29.068968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.069703] [ 29.070020] Freed by task 213: [ 29.070565] kasan_save_stack+0x22/0x50 [ 29.071121] kasan_set_track+0x25/0x30 [ 29.071675] kasan_save_free_info+0x2b/0x50 [ 29.072291] __kasan_slab_free+0x10a/0x190 [ 29.072886] kmem_cache_free+0x10d/0x4d0 [ 29.073452] rcu_core+0x8c8/0x2860 [ 29.073951] __do_softirq+0x1b7/0x7d4 [ 29.074486] [ 29.074731] Last potentially related work creation: [ 29.075379] kasan_save_stack+0x22/0x50 [ 29.075954] __kasan_record_aux_stack+0x8e/0xa0 [ 29.076598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.077316] remove_vma+0x139/0x170 [ 29.077827] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.078452] do_vmi_munmap+0x1f1/0x2b0 [ 29.079026] __vm_munmap+0x138/0x3a0 [ 29.079548] __x64_sys_munmap+0x59/0x80 [ 29.080114] do_syscall_64+0x3f/0x90 [ 29.080638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.081352] [ 29.081596] Second to last potentially related work creation: [ 29.082354] kasan_save_stack+0x22/0x50 [ 29.082942] __kasan_record_aux_stack+0x8e/0xa0 [ 29.083608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.084365] remove_vma+0x139/0x170 [ 29.084893] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.085539] do_vmi_munmap+0x1f1/0x2b0 [ 29.086114] mmap_region+0x1f9/0x2660 [ 29.086651] do_mmap+0x854/0xf00 [ 29.087221] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.087779] ksys_mmap_pgoff+0x3af/0x500 [ 29.088395] do_syscall_64+0x3f/0x90 [ 29.088918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.089581] [ 29.089803] The buggy address belongs to the object at ffff88800f2203a0 [ 29.089803] which belongs to the cache vm_area_struct of size 168 [ 29.091384] The buggy address is located 88 bytes inside of [ 29.091384] freed 168-byte region [ffff88800f2203a0, ffff88800f220448) [ 29.092844] [ 29.093065] The buggy address belongs to the physical page: [ 29.093756] page:00000000db9e5184 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf220 [ 29.094877] memcg:ffff88800e731e01 [ 29.095321] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.096020] page_type: 0xffffffff() [ 29.096467] raw: 0100000000000200 ffff8880087a0c80 ffffea000039d200 dead000000000006 [ 29.097503] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e731e01 [ 29.098503] page dumped because: kasan: bad access detected [ 29.099254] [ 29.099492] Memory state around the buggy address: [ 29.100158] ffff88800f220280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.101115] ffff88800f220300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.102083] >ffff88800f220380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.103031] ^ [ 29.103959] ffff88800f220400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.104905] ffff88800f220480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.105857] ================================================================== [ 29.106918] Disabling lock debugging due to kernel taint [ 30.992364] BUG: Bad rss-counter state mm:00000000bdac412f type:MM_FILEPAGES val:33 [ 30.993149] BUG: Bad rss-counter state mm:00000000bdac412f type:MM_ANONPAGES val:22 [ 31.543452] BUG: Bad rss-counter state mm:00000000775c93be type:MM_FILEPAGES val:33 [ 31.544695] BUG: Bad rss-counter state mm:00000000775c93be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64105' (ECDSA) to the list of known hosts. 2023/06/21 00:53:24 fuzzer started 2023/06/21 00:53:24 dialing manager at localhost:36067 2023/06/21 00:53:24 checking machine... 2023/06/21 00:53:24 checking revisions... [ 32.190700] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:53:24 testing simple program... [ 32.250264] cgroup: Unknown subsys name 'net' [ 32.295965] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:53:24 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88801a0973c0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856c1fc0 R13=ffffffff817923f2 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180f09a RFL=00000286 [--S--P-] 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 00007fee180d1900 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=000055a86a7e1748 CR3=0000000016b36000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880146ff218 RCX=0000000000000001 RDX=1ffff110028dfe44 RSI=ffff8880146ff870 RDI=ffff8880146ff220 RBP=ffff8880146ff870 RSP=ffff8880146ff170 R8 =ffffffff8614d2cc R9 =ffff8880146ff258 R10=0000000000038001 R11=00000000000243a0 R12=0000000000000008 R13=ffff8880146ff260 R14=ffff8880146ff878 R15=ffff8880146ff218 RIP=ffffffff81130445 RFL=00000246 [---Z-P-] 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 00007f34c4c4d900 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=00007f34c4047a70 CR3=000000000c828000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8ce59642c0bd821c00000000000ae988 XMM05=122e446477a638b60000000000133760 XMM06=e4cb8bb95a7664b600000000001328a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000