syzkaller login: [ 28.958012] BUG: Bad rss-counter state mm:0000000072cd5a75 type:MM_FILEPAGES val:33 [ 28.959466] BUG: Bad rss-counter state mm:0000000072cd5a75 type:MM_ANONPAGES val:22 [ 28.999573] ================================================================== [ 29.000777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.001901] Read of size 8 at addr ffff88800dd2ec20 by task sshd/218 [ 29.002905] [ 29.003150] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.004222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.005363] Call Trace: [ 29.005685] [ 29.006038] dump_stack_lvl+0x91/0xf0 [ 29.006635] print_report+0xcc/0x620 [ 29.007123] ? __virt_addr_valid+0x102/0x340 [ 29.007687] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.008313] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.008942] kasan_report+0xbe/0xf0 [ 29.009426] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.010063] vma_interval_tree_remove+0xc75/0xec0 [ 29.010676] vma_prepare+0xc54/0x11a0 [ 29.011166] __split_vma+0x5af/0x950 [ 29.011646] ? __pfx___split_vma+0x10/0x10 [ 29.012195] ? find_held_lock+0x2c/0x110 [ 29.012738] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.013324] ? lock_is_held_type+0x9f/0x120 [ 29.013868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.014473] ? mtree_range_walk+0x632/0x900 [ 29.015037] ? mas_walk+0x5c7/0x7c0 [ 29.015523] do_vmi_munmap+0x1f1/0x2b0 [ 29.016023] mmap_region+0x1f9/0x2660 [ 29.016519] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.017039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.017764] ? __pfx_lock_acquire+0x10/0x10 [ 29.018311] ? __pfx_mmap_region+0x10/0x10 [ 29.018843] ? security_mmap_addr+0x7d/0xa0 [ 29.019382] ? get_unmapped_area+0x1f5/0x3f0 [ 29.019930] do_mmap+0x854/0xf00 [ 29.020404] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.020900] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.021463] ksys_mmap_pgoff+0x3af/0x500 [ 29.021976] do_syscall_64+0x3f/0x90 [ 29.022453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.023115] RIP: 0033:0x7fde594fbd82 [ 29.023588] 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 [ 29.025735] RSP: 002b:00007fff6939b948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.026858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde594fbd82 [ 29.027715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde58935000 [ 29.028591] RBP: 00007fde58935000 R08: 0000000000000009 R09: 0000000000001000 [ 29.029451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7cba95ec0 [ 29.030305] R13: 00007fff6939b960 R14: 00007fff6939b990 R15: 00007fff6939bcf0 [ 29.031160] [ 29.031454] [ 29.031674] Allocated by task 211: [ 29.032102] kasan_save_stack+0x22/0x50 [ 29.032620] kasan_set_track+0x25/0x30 [ 29.033124] __kasan_slab_alloc+0x59/0x70 [ 29.033656] kmem_cache_alloc+0x16b/0x370 [ 29.034172] vm_area_dup+0x20/0x160 [ 29.034638] __split_vma+0x170/0x950 [ 29.035114] split_vma+0xc6/0x110 [ 29.035560] mprotect_fixup+0x8d2/0xb30 [ 29.036066] do_mprotect_pkey+0x87e/0xd40 [ 29.036605] __x64_sys_mprotect+0x78/0xc0 [ 29.037142] do_syscall_64+0x3f/0x90 [ 29.037619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.038267] [ 29.038483] Freed by task 211: [ 29.038880] kasan_save_stack+0x22/0x50 [ 29.039393] kasan_set_track+0x25/0x30 [ 29.039894] kasan_save_free_info+0x2b/0x50 [ 29.040445] __kasan_slab_free+0x10a/0x190 [ 29.040984] kmem_cache_free+0x10d/0x4d0 [ 29.041495] rcu_core+0x8c8/0x2860 [ 29.041953] __do_softirq+0x1b7/0x7d4 [ 29.042436] [ 29.042651] Last potentially related work creation: [ 29.043245] kasan_save_stack+0x22/0x50 [ 29.043749] __kasan_record_aux_stack+0x8e/0xa0 [ 29.044332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.044973] remove_vma+0x139/0x170 [ 29.045429] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.045993] do_vmi_munmap+0x1f1/0x2b0 [ 29.046488] __vm_munmap+0x138/0x3a0 [ 29.046953] __x64_sys_munmap+0x59/0x80 [ 29.047451] do_syscall_64+0x3f/0x90 [ 29.047928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.048591] [ 29.048806] Second to last potentially related work creation: [ 29.049502] kasan_save_stack+0x22/0x50 [ 29.050003] __kasan_record_aux_stack+0x8e/0xa0 [ 29.050583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.051222] remove_vma+0x139/0x170 [ 29.051673] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.052245] do_vmi_munmap+0x1f1/0x2b0 [ 29.052735] mmap_region+0x1f9/0x2660 [ 29.053217] do_mmap+0x854/0xf00 [ 29.053656] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.054145] ksys_mmap_pgoff+0x3af/0x500 [ 29.054651] do_syscall_64+0x3f/0x90 [ 29.055125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.055775] [ 29.055990] The buggy address belongs to the object at ffff88800dd2ebc8 [ 29.055990] which belongs to the cache vm_area_struct of size 168 [ 29.057485] The buggy address is located 88 bytes inside of [ 29.057485] freed 168-byte region [ffff88800dd2ebc8, ffff88800dd2ec70) [ 29.058896] [ 29.059114] The buggy address belongs to the physical page: [ 29.059777] page:00000000660c5f03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd2e [ 29.060880] memcg:ffff88800e31bb01 [ 29.061309] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.062011] page_type: 0xffffffff() [ 29.062466] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.063383] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e31bb01 [ 29.064300] page dumped because: kasan: bad access detected [ 29.064965] [ 29.065181] Memory state around the buggy address: [ 29.065764] ffff88800dd2eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.066626] ffff88800dd2eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.067494] >ffff88800dd2ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.068366] ^ [ 29.068895] ffff88800dd2ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.069763] ffff88800dd2ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.070614] ================================================================== [ 29.071742] Disabling lock debugging due to kernel taint [ 31.052486] BUG: Bad rss-counter state mm:0000000033198f22 type:MM_FILEPAGES val:33 [ 31.053490] BUG: Bad rss-counter state mm:0000000033198f22 type:MM_ANONPAGES val:22 [ 31.552433] BUG: Bad rss-counter state mm:000000004fdb7c32 type:MM_FILEPAGES val:33 [ 31.553791] BUG: Bad rss-counter state mm:000000004fdb7c32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57218' (ECDSA) to the list of known hosts. 2023/06/19 17:42:36 fuzzer started 2023/06/19 17:42:36 dialing manager at localhost:44161 2023/06/19 17:42:36 checking machine... 2023/06/19 17:42:36 checking revisions... [ 32.202865] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:42:36 testing simple program... [ 32.252732] cgroup: Unknown subsys name 'net' [ 32.322648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:42:35 Registers: info registers vcpu 0 RAX=0000001593825870 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000015 RSI=ffff88806ce28140 RDI=0000000000053345 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee2c8 R11=0000000000000001 R12=0000000000053345 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 00007f2aaef85900 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=00007f2aaf53c618 CR3=000000000dcf4000 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=ffff888008c58400 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=00007fa8c1687840 CR3=000000000c4e0000 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=19bbcc3326d206940a47fadf9c1358c7 XMM02=ec2efd57dc4c00df000000000011c648 XMM03=86cf9283e974c50b000000000011c718 XMM04=380548c42197f33b00000000000ae988 XMM05=dfcdbad4f1609c370000000000134998 XMM06=24b92963a8ae7aae0000000000133800 XMM07=e042d86d42eb936e0000000000123688 XMM08=86cf9283e974c50b000000000011c718 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000