syzkaller login: [ 30.882379] BUG: Bad rss-counter state mm:000000009cc8c5ba type:MM_FILEPAGES val:33 [ 30.883679] BUG: Bad rss-counter state mm:000000009cc8c5ba type:MM_ANONPAGES val:22 [ 31.032512] ================================================================== [ 31.033610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.034878] Read of size 8 at addr ffff88800c9df058 by task sshd/222 [ 31.035714] [ 31.035956] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.036866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.037884] Call Trace: [ 31.038227] [ 31.038531] dump_stack_lvl+0x91/0xf0 [ 31.039069] print_report+0xcc/0x620 [ 31.039602] ? __virt_addr_valid+0x102/0x340 [ 31.040182] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.040843] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.041490] kasan_report+0xbe/0xf0 [ 31.041997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.042650] vma_interval_tree_remove+0xc75/0xec0 [ 31.043322] vma_prepare+0xc54/0x11a0 [ 31.043833] __split_vma+0x5af/0x950 [ 31.044328] ? __pfx___split_vma+0x10/0x10 [ 31.044880] ? find_held_lock+0x2c/0x110 [ 31.045435] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.046030] ? lock_is_held_type+0x9f/0x120 [ 31.046595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.047242] ? mtree_range_walk+0x632/0x900 [ 31.047817] ? mas_walk+0x5c7/0x7c0 [ 31.048310] do_vmi_munmap+0x1f1/0x2b0 [ 31.048822] mmap_region+0x1f9/0x2660 [ 31.049329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.049862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.050622] ? __pfx_lock_acquire+0x10/0x10 [ 31.051184] ? __pfx_mmap_region+0x10/0x10 [ 31.051750] ? security_mmap_addr+0x7d/0xa0 [ 31.052308] ? get_unmapped_area+0x1f5/0x3f0 [ 31.052906] do_mmap+0x854/0xf00 [ 31.053364] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.053885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.054475] ksys_mmap_pgoff+0x3af/0x500 [ 31.055009] do_syscall_64+0x3f/0x90 [ 31.055530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.056220] RIP: 0033:0x7f82e1fc3d82 [ 31.056702] 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 [ 31.058944] RSP: 002b:00007fff2c9be638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.059892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82e1fc3d82 [ 31.060793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82e13fd000 [ 31.061672] RBP: 00007f82e13fd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.062562] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab6633ff60 [ 31.063475] R13: 00007fff2c9be650 R14: 00007fff2c9be680 R15: 00007fff2c9be9e0 [ 31.064376] [ 31.064683] [ 31.064917] Allocated by task 215: [ 31.065363] kasan_save_stack+0x22/0x50 [ 31.065888] kasan_set_track+0x25/0x30 [ 31.066506] __kasan_slab_alloc+0x59/0x70 [ 31.067173] kmem_cache_alloc+0x16b/0x370 [ 31.067801] vm_area_dup+0x20/0x160 [ 31.068359] __split_vma+0x170/0x950 [ 31.068934] split_vma+0xc6/0x110 [ 31.069470] mprotect_fixup+0x8d2/0xb30 [ 31.070090] do_mprotect_pkey+0x87e/0xd40 [ 31.070731] __x64_sys_mprotect+0x78/0xc0 [ 31.071399] do_syscall_64+0x3f/0x90 [ 31.071988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072624] [ 31.072843] Freed by task 215: [ 31.073233] kasan_save_stack+0x22/0x50 [ 31.073733] kasan_set_track+0x25/0x30 [ 31.074222] kasan_save_free_info+0x2b/0x50 [ 31.074753] __kasan_slab_free+0x10a/0x190 [ 31.075290] kmem_cache_free+0x10d/0x4d0 [ 31.075857] rcu_core+0x8c8/0x2860 [ 31.076303] __do_softirq+0x1b7/0x7d4 [ 31.076784] [ 31.076999] Last potentially related work creation: [ 31.077589] kasan_save_stack+0x22/0x50 [ 31.078092] __kasan_record_aux_stack+0x8e/0xa0 [ 31.078686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.079483] remove_vma+0x139/0x170 [ 31.079936] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.080468] do_vmi_munmap+0x1f1/0x2b0 [ 31.080930] __vm_munmap+0x138/0x3a0 [ 31.081376] __x64_sys_munmap+0x59/0x80 [ 31.081846] do_syscall_64+0x3f/0x90 [ 31.082296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082906] [ 31.083190] Second to last potentially related work creation: [ 31.083910] kasan_save_stack+0x22/0x50 [ 31.084427] __kasan_record_aux_stack+0x8e/0xa0 [ 31.085005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.085665] remove_vma+0x139/0x170 [ 31.086113] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.086671] do_vmi_munmap+0x1f1/0x2b0 [ 31.087170] mmap_region+0x1f9/0x2660 [ 31.087652] do_mmap+0x854/0xf00 [ 31.088088] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.088576] ksys_mmap_pgoff+0x3af/0x500 [ 31.089073] do_syscall_64+0x3f/0x90 [ 31.089543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.090186] [ 31.090403] The buggy address belongs to the object at ffff88800c9df000 [ 31.090403] which belongs to the cache vm_area_struct of size 168 [ 31.091909] The buggy address is located 88 bytes inside of [ 31.091909] freed 168-byte region [ffff88800c9df000, ffff88800c9df0a8) [ 31.093332] [ 31.093550] The buggy address belongs to the physical page: [ 31.094221] page:000000005dd5c366 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9df [ 31.095291] memcg:ffff88800e54f201 [ 31.095694] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.096297] page_type: 0xffffffff() [ 31.096722] raw: 0100000000000200 ffff8880087a0c80 ffffea0000320800 dead000000000004 [ 31.097586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e54f201 [ 31.098436] page dumped because: kasan: bad access detected [ 31.099062] [ 31.099271] Memory state around the buggy address: [ 31.099815] ffff88800c9def00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.100619] ffff88800c9def80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.101412] >ffff88800c9df000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.102209] ^ [ 31.102900] ffff88800c9df080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.103744] ffff88800c9df100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.104553] ================================================================== [ 31.105455] Disabling lock debugging due to kernel taint [ 33.792944] BUG: Bad rss-counter state mm:00000000f7694709 type:MM_FILEPAGES val:33 [ 33.794442] BUG: Bad rss-counter state mm:00000000f7694709 type:MM_ANONPAGES val:22 [ 34.273790] BUG: Bad rss-counter state mm:000000001591e8e2 type:MM_FILEPAGES val:33 [ 34.274713] BUG: Bad rss-counter state mm:000000001591e8e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31699' (ECDSA) to the list of known hosts. 2023/06/20 21:19:45 fuzzer started 2023/06/20 21:19:45 dialing manager at localhost:36067 2023/06/20 21:19:45 checking machine... 2023/06/20 21:19:45 checking revisions... [ 35.018502] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:19:46 testing simple program... [ 35.062119] cgroup: Unknown subsys name 'net' [ 35.113915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:19:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8137abd3 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d120000 RBP=ffff88800d120000 RSP=ffff8880142d7990 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3e490 R11=0000000000000000 R12=ffff88806ce3a2d1 R13=ffff88806ce3a2c0 R14=ffff88800d120000 R15=0000000000000001 RIP=ffffffff813772f6 RFL=00000046 [---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 00007f6f66f59900 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=00007f6f6638f410 CR3=000000000d5fa000 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=8b4b73acae2ab58014427f2102a5422a XMM02=eff9b2d0a8fce9cb000000000011d358 XMM03=2c67c8bc2e329bc3000000000011d480 XMM04=d0c82d9ae09dc60a00000000000ae988 XMM05=b7d9e2c388c30cdf0000000000133f88 XMM06=827d7b12100194040000000000132d28 XMM07=fb795ef6d65770560000000000121c20 XMM08=2c67c8bc2e329bc3000000000011d480 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000e0 RBX=00000000000000e0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800be681a0 RSP=ffff888015b1f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffff88800be68050 R14=ffff88800be68048 R15=ffff88800be68060 RIP=ffffffff82191d9e RFL=00000093 [--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 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=00007fffed076628 CR3=0000000005482000 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=00007fda47b73510000055f5ec53f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000