syzkaller login: [ 29.990640] BUG: Bad rss-counter state mm:00000000ac9db9d3 type:MM_FILEPAGES val:33 [ 29.991886] BUG: Bad rss-counter state mm:00000000ac9db9d3 type:MM_ANONPAGES val:22 [ 30.031334] ================================================================== [ 30.032422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.033447] Read of size 8 at addr ffff88800eb15880 by task sshd/219 [ 30.034272] [ 30.034510] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.035439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.036515] Call Trace: [ 30.036868] [ 30.037176] dump_stack_lvl+0x91/0xf0 [ 30.037708] print_report+0xcc/0x620 [ 30.038231] ? __virt_addr_valid+0x102/0x340 [ 30.038833] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.039501] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.040174] kasan_report+0xbe/0xf0 [ 30.040709] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.041388] vma_interval_tree_remove+0xc75/0xec0 [ 30.042037] vma_prepare+0xc54/0x11a0 [ 30.042565] __split_vma+0x5af/0x950 [ 30.043080] ? __pfx___split_vma+0x10/0x10 [ 30.043655] ? find_held_lock+0x2c/0x110 [ 30.044210] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.044833] ? lock_is_held_type+0x9f/0x120 [ 30.045422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.046087] ? mtree_range_walk+0x632/0x900 [ 30.046692] ? mas_walk+0x5c7/0x7c0 [ 30.047211] do_vmi_munmap+0x1f1/0x2b0 [ 30.047744] mmap_region+0x1f9/0x2660 [ 30.048270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.048842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.049606] ? __pfx_lock_acquire+0x10/0x10 [ 30.050174] ? __pfx_mmap_region+0x10/0x10 [ 30.050741] ? security_mmap_addr+0x7d/0xa0 [ 30.051311] ? get_unmapped_area+0x1f5/0x3f0 [ 30.051904] do_mmap+0x854/0xf00 [ 30.052374] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.052926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.053527] ksys_mmap_pgoff+0x3af/0x500 [ 30.054073] do_syscall_64+0x3f/0x90 [ 30.054592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.055285] RIP: 0033:0x7fa17c517d82 [ 30.055775] 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 [ 30.058066] RSP: 002b:00007ffef912c5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.059041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa17c517d82 [ 30.059946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa17b951000 [ 30.060863] RBP: 00007fa17b951000 R08: 0000000000000009 R09: 0000000000001000 [ 30.061770] R10: 0000000000000812 R11: 0000000000000206 R12: 000055611c40bb20 [ 30.062664] R13: 00007ffef912c610 R14: 00007ffef912c640 R15: 00007ffef912c9a0 [ 30.063577] [ 30.063888] [ 30.064116] Allocated by task 212: [ 30.064590] kasan_save_stack+0x22/0x50 [ 30.065129] kasan_set_track+0x25/0x30 [ 30.065654] __kasan_slab_alloc+0x59/0x70 [ 30.066212] kmem_cache_alloc+0x16b/0x370 [ 30.066760] vm_area_dup+0x20/0x160 [ 30.067247] __split_vma+0x170/0x950 [ 30.067746] split_vma+0xc6/0x110 [ 30.068213] mprotect_fixup+0x8d2/0xb30 [ 30.068767] do_mprotect_pkey+0x87e/0xd40 [ 30.069320] __x64_sys_mprotect+0x78/0xc0 [ 30.069872] do_syscall_64+0x3f/0x90 [ 30.070377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.071065] [ 30.071294] Freed by task 212: [ 30.071736] kasan_save_stack+0x22/0x50 [ 30.072330] kasan_set_track+0x25/0x30 [ 30.072964] kasan_save_free_info+0x2b/0x50 [ 30.073553] __kasan_slab_free+0x10a/0x190 [ 30.074145] kmem_cache_free+0x10d/0x4d0 [ 30.074685] rcu_core+0x8c8/0x2860 [ 30.075172] __do_softirq+0x1b7/0x7d4 [ 30.075701] [ 30.075938] Last potentially related work creation: [ 30.076605] kasan_save_stack+0x22/0x50 [ 30.077175] __kasan_record_aux_stack+0x8e/0xa0 [ 30.077809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.078519] remove_vma+0x139/0x170 [ 30.079021] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.079636] do_vmi_munmap+0x1f1/0x2b0 [ 30.080170] __vm_munmap+0x138/0x3a0 [ 30.080692] __x64_sys_munmap+0x59/0x80 [ 30.081246] do_syscall_64+0x3f/0x90 [ 30.081779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.082493] [ 30.082730] Second to last potentially related work creation: [ 30.083463] kasan_save_stack+0x22/0x50 [ 30.084008] __kasan_record_aux_stack+0x8e/0xa0 [ 30.084662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.085373] remove_vma+0x139/0x170 [ 30.085875] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.086502] do_vmi_munmap+0x1f1/0x2b0 [ 30.087043] mmap_region+0x1f9/0x2660 [ 30.087577] do_mmap+0x854/0xf00 [ 30.088053] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.088612] ksys_mmap_pgoff+0x3af/0x500 [ 30.089173] do_syscall_64+0x3f/0x90 [ 30.089710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.090428] [ 30.090667] The buggy address belongs to the object at ffff88800eb15828 [ 30.090667] which belongs to the cache vm_area_struct of size 168 [ 30.092305] The buggy address is located 88 bytes inside of [ 30.092305] freed 168-byte region [ffff88800eb15828, ffff88800eb158d0) [ 30.094002] [ 30.094258] The buggy address belongs to the physical page: [ 30.095056] page:0000000082d46590 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb15 [ 30.096377] memcg:ffff88800e6b5401 [ 30.096886] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.097675] page_type: 0xffffffff() [ 30.098220] raw: 0100000000000200 ffff8880087a0c80 ffffea00003acb40 dead000000000008 [ 30.099339] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6b5401 [ 30.100476] page dumped because: kasan: bad access detected [ 30.101286] [ 30.101539] Memory state around the buggy address: [ 30.102247] ffff88800eb15780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.103279] ffff88800eb15800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.104317] >ffff88800eb15880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.105372] ^ [ 30.105873] ffff88800eb15900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.106949] ffff88800eb15980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.107984] ================================================================== [ 30.109312] Disabling lock debugging due to kernel taint [ 32.099459] BUG: Bad rss-counter state mm:000000007217eb6e type:MM_FILEPAGES val:33 [ 32.100519] BUG: Bad rss-counter state mm:000000007217eb6e type:MM_ANONPAGES val:22 [ 32.556282] BUG: Bad rss-counter state mm:0000000084c03fef type:MM_FILEPAGES val:33 [ 32.557301] BUG: Bad rss-counter state mm:0000000084c03fef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14657' (ECDSA) to the list of known hosts. 2023/06/20 23:40:21 fuzzer started 2023/06/20 23:40:21 dialing manager at localhost:36067 2023/06/20 23:40:21 checking machine... 2023/06/20 23:40:21 checking revisions... [ 33.249669] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:40:21 testing simple program... [ 33.298186] cgroup: Unknown subsys name 'net' [ 33.362098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:40:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000cc608fb8 RCX=ffffffff8219d5a2 RDX=ffff8880102dd1c0 RSI=0000000000000004 RDI=0000000000000000 RBP=000000000000000f RSP=ffff8880147cf650 R8 =0000000000000006 R9 =000000000000000f R10=000000000000000f R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2d80 R14=000000000000000f R15=0000000000000004 RIP=ffffffff814c0438 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 00007fdb32662700 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=00007efd762ee5e0 CR3=000000000e184000 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=2030323a30343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a30343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85fa8e7c RCX=ffffffff836827d8 RDX=0000000000000001 RSI=ffffffff863b941c RDI=ffffffff85fa8e7c RBP=ffffffff85fa8e7c RSP=ffff88800ed2f490 R8 =ffffffff863b941c R9 =ffff88800ed2f588 R10=0000000000038001 R11=000000000008b92e R12=ffffffff85fa8e80 R13=ffffffff85fa8e7c R14=ffffffff85fa8e7c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000257 [---ZAPC] 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 00007f41d560f900 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=00007fff33143000 CR3=000000000eed6000 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=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