syzkaller login: [ 39.878378] BUG: Bad rss-counter state mm:0000000084177d42 type:MM_FILEPAGES val:33 [ 39.879573] BUG: Bad rss-counter state mm:0000000084177d42 type:MM_ANONPAGES val:22 [ 40.033840] ================================================================== [ 40.034771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.035742] Read of size 8 at addr ffff88800d3a6228 by task sshd/219 [ 40.036636] [ 40.036868] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.037775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.038804] Call Trace: [ 40.039125] [ 40.039411] dump_stack_lvl+0x91/0xf0 [ 40.039897] print_report+0xcc/0x620 [ 40.040378] ? __virt_addr_valid+0x102/0x340 [ 40.040962] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.041577] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.042209] kasan_report+0xbe/0xf0 [ 40.042679] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.043306] vma_interval_tree_remove+0xc75/0xec0 [ 40.043911] vma_prepare+0xc54/0x11a0 [ 40.044398] __split_vma+0x5af/0x950 [ 40.044870] ? __pfx___split_vma+0x10/0x10 [ 40.045403] ? find_held_lock+0x2c/0x110 [ 40.045960] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.046548] ? lock_is_held_type+0x9f/0x120 [ 40.047116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.047740] ? mtree_range_walk+0x632/0x900 [ 40.048306] ? mas_walk+0x5c7/0x7c0 [ 40.048797] do_vmi_munmap+0x1f1/0x2b0 [ 40.049312] mmap_region+0x1f9/0x2660 [ 40.049835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.050358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.051115] ? __pfx_lock_acquire+0x10/0x10 [ 40.051677] ? __pfx_mmap_region+0x10/0x10 [ 40.052232] ? security_mmap_addr+0x7d/0xa0 [ 40.052793] ? get_unmapped_area+0x1f5/0x3f0 [ 40.053368] do_mmap+0x854/0xf00 [ 40.053847] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.054349] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.054905] ksys_mmap_pgoff+0x3af/0x500 [ 40.055412] do_syscall_64+0x3f/0x90 [ 40.055894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.056541] RIP: 0033:0x7f0984272d82 [ 40.057000] 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 [ 40.059143] RSP: 002b:00007ffd540d3b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.060059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0984272d82 [ 40.060903] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09836ac000 [ 40.061750] RBP: 00007f09836ac000 R08: 0000000000000009 R09: 0000000000001000 [ 40.062598] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f6cec0b20 [ 40.063456] R13: 00007ffd540d3b30 R14: 00007ffd540d3b60 R15: 00007ffd540d3ec0 [ 40.064311] [ 40.064608] [ 40.064827] Allocated by task 212: [ 40.065255] kasan_save_stack+0x22/0x50 [ 40.065768] kasan_set_track+0x25/0x30 [ 40.066268] __kasan_slab_alloc+0x59/0x70 [ 40.066794] kmem_cache_alloc+0x16b/0x370 [ 40.067313] vm_area_dup+0x20/0x160 [ 40.067770] __split_vma+0x170/0x950 [ 40.068246] split_vma+0xc6/0x110 [ 40.068703] mprotect_fixup+0x8d2/0xb30 [ 40.069211] do_mprotect_pkey+0x87e/0xd40 [ 40.069752] __x64_sys_mprotect+0x78/0xc0 [ 40.070272] do_syscall_64+0x3f/0x90 [ 40.070750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.071398] [ 40.071614] Freed by task 203: [ 40.072009] kasan_save_stack+0x22/0x50 [ 40.072524] kasan_set_track+0x25/0x30 [ 40.073022] kasan_save_free_info+0x2b/0x50 [ 40.073561] __kasan_slab_free+0x10a/0x190 [ 40.074104] kmem_cache_free+0x10d/0x4d0 [ 40.074614] rcu_core+0x8c8/0x2860 [ 40.075067] __do_softirq+0x1b7/0x7d4 [ 40.075553] [ 40.075768] Last potentially related work creation: [ 40.076348] kasan_save_stack+0x22/0x50 [ 40.076852] __kasan_record_aux_stack+0x8e/0xa0 [ 40.077432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.078077] remove_vma+0x139/0x170 [ 40.078528] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.079101] do_vmi_munmap+0x1f1/0x2b0 [ 40.079597] __vm_munmap+0x138/0x3a0 [ 40.080072] __x64_sys_munmap+0x59/0x80 [ 40.080574] do_syscall_64+0x3f/0x90 [ 40.081051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.081711] [ 40.081931] The buggy address belongs to the object at ffff88800d3a61d0 [ 40.081931] which belongs to the cache vm_area_struct of size 168 [ 40.083421] The buggy address is located 88 bytes inside of [ 40.083421] freed 168-byte region [ffff88800d3a61d0, ffff88800d3a6278) [ 40.084857] [ 40.085073] The buggy address belongs to the physical page: [ 40.085760] page:00000000c6cecb6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd3a6 [ 40.086851] memcg:ffff88800d6c5101 [ 40.087281] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.087931] page_type: 0xffffffff() [ 40.088392] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.089312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6c5101 [ 40.090246] page dumped because: kasan: bad access detected [ 40.090924] [ 40.091145] Memory state around the buggy address: [ 40.091722] ffff88800d3a6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.092580] ffff88800d3a6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.093458] >ffff88800d3a6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.094317] ^ [ 40.094888] ffff88800d3a6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.095760] ffff88800d3a6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.096620] ================================================================== [ 40.097660] Disabling lock debugging due to kernel taint [ 42.155633] BUG: Bad rss-counter state mm:0000000050e9dcbb type:MM_FILEPAGES val:33 [ 42.156641] BUG: Bad rss-counter state mm:0000000050e9dcbb type:MM_ANONPAGES val:22 [ 42.558223] BUG: Bad rss-counter state mm:000000009da5aecd type:MM_FILEPAGES val:33 [ 42.559226] BUG: Bad rss-counter state mm:000000009da5aecd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55940' (ECDSA) to the list of known hosts. 2023/06/19 12:34:20 fuzzer started 2023/06/19 12:34:20 dialing manager at localhost:44161 2023/06/19 12:34:20 checking machine... 2023/06/19 12:34:20 checking revisions... [ 43.262407] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:34:20 testing simple program... [ 43.313451] cgroup: Unknown subsys name 'net' [ 43.369551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:34:19 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11001b5bea8 RSI=ffffffff8180c585 RDI=ffff88800dadf5b0 RBP=ffff88800dadf580 RSP=ffff88800dadf4e0 R8 =ffffffff8613751e R9 =ffff88800dadf528 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800dadf5b0 R13=0000000000000000 R14=ffff8880102ab680 R15=1ffff11001b5bf1d RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007fdef7e8c900 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=00007fdef73ac000 CR3=0000000008eec000 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=88edb3c6f8345282e64a2ac84f9f1d7b XMM02=000000000011de40d59e07bde36eea69 XMM03=000000000011df68ec2efd57dc4c00df XMM04=03c864838543944b00000000000ae988 XMM05=2bb7e5c5c7a561840000000000134e90 XMM06=806171799158d9670000000000133910 XMM07=fb795ef6d65770560000000000124190 XMM08=2c67c8bc2e329bc3000000000011df68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf4872 RBX=ffffffff85fa4394 RCX=ffffffff83644343 RDX=0000000000000007 RSI=ffffffff863b2b5a RDI=ffffffff85fa4388 RBP=ffffffff85fa4388 RSP=ffff88801ce07360 R8 =ffffffff863b2b5a R9 =ffff88801ce07458 R10=0000000000038001 R11=000000000008abed R12=ffffffff85fa43a4 R13=ffffffff85fa4388 R14=ffffffff85fa4388 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000217 [----APC] 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 00007fda39113900 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=00007fda396ca618 CR3=00000000180fe000 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=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