syzkaller login: [ 31.990164] BUG: Bad rss-counter state mm:00000000f0d39906 type:MM_FILEPAGES val:33 [ 31.991480] BUG: Bad rss-counter state mm:00000000f0d39906 type:MM_ANONPAGES val:22 [ 32.031911] ================================================================== [ 32.033085] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.034073] Read of size 8 at addr ffff88800e364140 by task sshd/220 [ 32.034882] [ 32.035109] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.036004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.037012] Call Trace: [ 32.037358] [ 32.037660] dump_stack_lvl+0x91/0xf0 [ 32.038163] print_report+0xcc/0x620 [ 32.038671] ? __virt_addr_valid+0x102/0x340 [ 32.039243] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.039860] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.040505] kasan_report+0xbe/0xf0 [ 32.040991] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.041660] vma_interval_tree_remove+0xc75/0xec0 [ 32.042287] vma_prepare+0xc54/0x11a0 [ 32.042775] __split_vma+0x5af/0x950 [ 32.043267] ? __pfx___split_vma+0x10/0x10 [ 32.043800] ? find_held_lock+0x2c/0x110 [ 32.044339] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.044937] ? lock_is_held_type+0x9f/0x120 [ 32.045500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.046109] ? mtree_range_walk+0x632/0x900 [ 32.046763] ? mas_walk+0x5c7/0x7c0 [ 32.047404] do_vmi_munmap+0x1f1/0x2b0 [ 32.048075] mmap_region+0x1f9/0x2660 [ 32.048731] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.049415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.050359] ? __pfx_lock_acquire+0x10/0x10 [ 32.051077] ? __pfx_mmap_region+0x10/0x10 [ 32.051792] ? security_mmap_addr+0x7d/0xa0 [ 32.052420] ? get_unmapped_area+0x1f5/0x3f0 [ 32.052989] do_mmap+0x854/0xf00 [ 32.053448] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.053948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.054530] ksys_mmap_pgoff+0x3af/0x500 [ 32.055042] do_syscall_64+0x3f/0x90 [ 32.055551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.056210] RIP: 0033:0x7f9299e63d82 [ 32.056704] 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 [ 32.058857] RSP: 002b:00007ffe457fc1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.059943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9299e63d82 [ 32.060841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f929929d000 [ 32.061728] RBP: 00007f929929d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.062599] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ddac40d90 [ 32.063461] R13: 00007ffe457fc1c0 R14: 00007ffe457fc1f0 R15: 00007ffe457fc550 [ 32.064336] [ 32.064824] [ 32.065102] Allocated by task 213: [ 32.065634] kasan_save_stack+0x22/0x50 [ 32.066253] kasan_set_track+0x25/0x30 [ 32.066857] __kasan_slab_alloc+0x59/0x70 [ 32.067493] kmem_cache_alloc+0x16b/0x370 [ 32.068120] vm_area_dup+0x20/0x160 [ 32.068697] __split_vma+0x170/0x950 [ 32.069276] split_vma+0xc6/0x110 [ 32.069812] mprotect_fixup+0x8d2/0xb30 [ 32.070422] do_mprotect_pkey+0x87e/0xd40 [ 32.071063] __x64_sys_mprotect+0x78/0xc0 [ 32.071701] do_syscall_64+0x3f/0x90 [ 32.072279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.073065] [ 32.073282] Freed by task 213: [ 32.073672] kasan_save_stack+0x22/0x50 [ 32.074175] kasan_set_track+0x25/0x30 [ 32.074665] kasan_save_free_info+0x2b/0x50 [ 32.075195] __kasan_slab_free+0x10a/0x190 [ 32.075734] kmem_cache_free+0x10d/0x4d0 [ 32.076237] rcu_core+0x8c8/0x2860 [ 32.076687] __do_softirq+0x1b7/0x7d4 [ 32.077158] [ 32.077372] Last potentially related work creation: [ 32.077964] kasan_save_stack+0x22/0x50 [ 32.078474] __kasan_record_aux_stack+0x8e/0xa0 [ 32.079055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.079696] remove_vma+0x139/0x170 [ 32.080155] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.080740] do_vmi_munmap+0x1f1/0x2b0 [ 32.081237] __vm_munmap+0x138/0x3a0 [ 32.081717] __x64_sys_munmap+0x59/0x80 [ 32.082214] do_syscall_64+0x3f/0x90 [ 32.082685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.083323] [ 32.083537] Second to last potentially related work creation: [ 32.084218] kasan_save_stack+0x22/0x50 [ 32.084726] __kasan_record_aux_stack+0x8e/0xa0 [ 32.085305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.085944] remove_vma+0x139/0x170 [ 32.086394] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.086946] do_vmi_munmap+0x1f1/0x2b0 [ 32.087428] mmap_region+0x1f9/0x2660 [ 32.087900] do_mmap+0x854/0xf00 [ 32.088331] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.088858] ksys_mmap_pgoff+0x3af/0x500 [ 32.089364] do_syscall_64+0x3f/0x90 [ 32.089834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.090470] [ 32.090689] The buggy address belongs to the object at ffff88800e3640e8 [ 32.090689] which belongs to the cache vm_area_struct of size 168 [ 32.092152] The buggy address is located 88 bytes inside of [ 32.092152] freed 168-byte region [ffff88800e3640e8, ffff88800e364190) [ 32.093552] [ 32.093771] The buggy address belongs to the physical page: [ 32.094420] page:00000000f171a79d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe364 [ 32.095493] memcg:ffff88800e23a801 [ 32.095926] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.096572] page_type: 0xffffffff() [ 32.097019] raw: 0100000000000200 ffff88800879fc80 ffffea00003a3cc0 dead000000000004 [ 32.097932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e23a801 [ 32.098837] page dumped because: kasan: bad access detected [ 32.099495] [ 32.099710] Memory state around the buggy address: [ 32.100287] ffff88800e364000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.101163] ffff88800e364080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.102016] >ffff88800e364100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.102857] ^ [ 32.103491] ffff88800e364180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 32.104342] ffff88800e364200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.105196] ================================================================== [ 32.106454] Disabling lock debugging due to kernel taint [ 34.457660] BUG: Bad rss-counter state mm:000000009e63076c type:MM_FILEPAGES val:33 [ 34.458737] BUG: Bad rss-counter state mm:000000009e63076c type:MM_ANONPAGES val:22 [ 34.914677] BUG: Bad rss-counter state mm:000000003efc9208 type:MM_FILEPAGES val:33 [ 34.915892] BUG: Bad rss-counter state mm:000000003efc9208 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37803' (ECDSA) to the list of known hosts. 2023/06/19 22:35:27 fuzzer started 2023/06/19 22:35:28 dialing manager at localhost:44161 2023/06/19 22:35:28 checking machine... 2023/06/19 22:35:28 checking revisions... [ 35.624124] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:35:28 testing simple program... [ 35.672938] cgroup: Unknown subsys name 'net' [ 35.737691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:27 Registers: info registers vcpu 0 RAX=1ffffffff0a92574 RBX=ffffffff85d3d010 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff84901780 RDI=ffffffff87f308a0 RBP=ffffffff87f308a0 RSP=ffff88800f0c7c60 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88800e53195f R11=00000000000b6996 R12=ffffffff87f308a0 R13=0000000000000000 R14=ffffffff87b67200 R15=ffff888008f92000 RIP=ffffffff812c198e 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 00007fb888bb1900 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=00007ffc252a9000 CR3=000000000e68c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007ffa59a5ed20 CR3=000000000c5b6000 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=2037323a35333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a35333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000