syzkaller login: [ 35.885201] BUG: Bad rss-counter state mm:0000000098947db9 type:MM_FILEPAGES val:33 [ 35.886398] BUG: Bad rss-counter state mm:0000000098947db9 type:MM_ANONPAGES val:22 [ 36.045190] ================================================================== [ 36.046141] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.047093] Read of size 8 at addr ffff888016b4ced8 by task sshd/222 [ 36.047861] [ 36.048079] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.049051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.050052] Call Trace: [ 36.050384] [ 36.050667] dump_stack_lvl+0x91/0xf0 [ 36.051154] print_report+0xcc/0x620 [ 36.051640] ? __virt_addr_valid+0x102/0x340 [ 36.052193] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.052816] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.053441] kasan_report+0xbe/0xf0 [ 36.053944] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.054581] vma_interval_tree_remove+0xc75/0xec0 [ 36.055194] vma_prepare+0xc54/0x11a0 [ 36.055674] __split_vma+0x5af/0x950 [ 36.056150] ? __pfx___split_vma+0x10/0x10 [ 36.056671] ? find_held_lock+0x2c/0x110 [ 36.057195] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.057764] ? lock_is_held_type+0x9f/0x120 [ 36.058315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.058922] ? mtree_range_walk+0x632/0x900 [ 36.059478] ? mas_walk+0x5c7/0x7c0 [ 36.059953] do_vmi_munmap+0x1f1/0x2b0 [ 36.060444] mmap_region+0x1f9/0x2660 [ 36.060926] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.061435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.062155] ? __pfx_lock_acquire+0x10/0x10 [ 36.062691] ? __pfx_mmap_region+0x10/0x10 [ 36.063247] ? security_mmap_addr+0x7d/0xa0 [ 36.063782] ? get_unmapped_area+0x1f5/0x3f0 [ 36.064338] do_mmap+0x854/0xf00 [ 36.064772] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.065269] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.065828] ksys_mmap_pgoff+0x3af/0x500 [ 36.066359] do_syscall_64+0x3f/0x90 [ 36.066833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.067479] RIP: 0033:0x7f2bb46a4d82 [ 36.067933] 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 [ 36.070183] RSP: 002b:00007ffcfc8685f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.071070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bb46a4d82 [ 36.071898] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bb3ade000 [ 36.072732] RBP: 00007f2bb3ade000 R08: 0000000000000009 R09: 0000000000001000 [ 36.073551] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e1de6aec0 [ 36.074390] R13: 00007ffcfc868610 R14: 00007ffcfc868640 R15: 00007ffcfc8689a0 [ 36.075239] [ 36.075523] [ 36.075737] Allocated by task 215: [ 36.076166] kasan_save_stack+0x22/0x50 [ 36.076676] kasan_set_track+0x25/0x30 [ 36.077171] __kasan_slab_alloc+0x59/0x70 [ 36.077688] kmem_cache_alloc+0x16b/0x370 [ 36.078218] vm_area_dup+0x20/0x160 [ 36.078665] __split_vma+0x170/0x950 [ 36.079125] split_vma+0xc6/0x110 [ 36.079564] mprotect_fixup+0x8d2/0xb30 [ 36.080061] do_mprotect_pkey+0x87e/0xd40 [ 36.080569] __x64_sys_mprotect+0x78/0xc0 [ 36.081077] do_syscall_64+0x3f/0x90 [ 36.081546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.082188] [ 36.082400] Freed by task 13: [ 36.082778] kasan_save_stack+0x22/0x50 [ 36.083273] kasan_set_track+0x25/0x30 [ 36.083762] kasan_save_free_info+0x2b/0x50 [ 36.084285] __kasan_slab_free+0x10a/0x190 [ 36.084809] kmem_cache_free+0x10d/0x4d0 [ 36.085305] rcu_core+0x8c8/0x2860 [ 36.085741] __do_softirq+0x1b7/0x7d4 [ 36.086211] [ 36.086425] Last potentially related work creation: [ 36.086997] kasan_save_stack+0x22/0x50 [ 36.087486] __kasan_record_aux_stack+0x8e/0xa0 [ 36.088047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.088694] remove_vma+0x139/0x170 [ 36.089137] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.089680] do_vmi_munmap+0x1f1/0x2b0 [ 36.090166] __vm_munmap+0x138/0x3a0 [ 36.090617] __x64_sys_munmap+0x59/0x80 [ 36.091100] do_syscall_64+0x3f/0x90 [ 36.091577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.092204] [ 36.092416] The buggy address belongs to the object at ffff888016b4ce80 [ 36.092416] which belongs to the cache vm_area_struct of size 168 [ 36.093856] The buggy address is located 88 bytes inside of [ 36.093856] freed 168-byte region [ffff888016b4ce80, ffff888016b4cf28) [ 36.095219] [ 36.095429] The buggy address belongs to the physical page: [ 36.096074] page:0000000034a41b15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b4c [ 36.097151] memcg:ffff888016b4b101 [ 36.097566] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.098216] page_type: 0xffffffff() [ 36.098659] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.099563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b4b101 [ 36.100461] page dumped because: kasan: bad access detected [ 36.101117] [ 36.101331] Memory state around the buggy address: [ 36.101910] ffff888016b4cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.102747] ffff888016b4ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.103586] >ffff888016b4ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.104413] ^ [ 36.105118] ffff888016b4cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.105959] ffff888016b4cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.106802] ================================================================== [ 36.107775] Disabling lock debugging due to kernel taint [ 38.824639] BUG: Bad rss-counter state mm:000000005b83c4ac type:MM_FILEPAGES val:33 [ 38.825591] BUG: Bad rss-counter state mm:000000005b83c4ac type:MM_ANONPAGES val:22 [ 39.272100] BUG: Bad rss-counter state mm:0000000090b0a30d type:MM_FILEPAGES val:33 [ 39.273057] BUG: Bad rss-counter state mm:0000000090b0a30d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33754' (ECDSA) to the list of known hosts. 2023/06/19 15:35:02 fuzzer started 2023/06/19 15:35:03 dialing manager at localhost:44161 2023/06/19 15:35:03 checking machine... 2023/06/19 15:35:03 checking revisions... [ 40.003474] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:35:03 testing simple program... [ 40.054407] cgroup: Unknown subsys name 'net' [ 40.107426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:34:58 Registers: info registers vcpu 0 RAX=ffffffff8363c272 RBX=ffffffff85fa379c RCX=ffffffff8363c465 RDX=0000000000000000 RSI=ffffffff863b1978 RDI=ffffffff85fa379c RBP=ffffffff85fa379c RSP=ffff88806ce099e0 R8 =ffffffff863b1978 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a8f2 R12=ffffffff85fa379c R13=ffffffff85fa379c R14=ffffffff85fa379c R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000206 [-----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 00007fe573f30900 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=00007fe5744e5650 CR3=00000000167d6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=000055e03b713000 CR3=000000000f840000 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=2032303a35333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000