syzkaller login: [ 36.761952] BUG: Bad rss-counter state mm:0000000005771e87 type:MM_FILEPAGES val:33 [ 36.763009] BUG: Bad rss-counter state mm:0000000005771e87 type:MM_ANONPAGES val:22 [ 36.927183] ================================================================== [ 36.928085] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.929031] Read of size 8 at addr ffff88800e6e5968 by task sshd/220 [ 36.929777] [ 36.930078] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.930920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.931870] Call Trace: [ 36.932188] [ 36.932496] dump_stack_lvl+0x91/0xf0 [ 36.932978] print_report+0xcc/0x620 [ 36.933460] ? __virt_addr_valid+0x102/0x340 [ 36.934010] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.934616] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.935219] kasan_report+0xbe/0xf0 [ 36.935696] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.936319] vma_interval_tree_remove+0xc75/0xec0 [ 36.936923] vma_prepare+0xc54/0x11a0 [ 36.937404] __split_vma+0x5af/0x950 [ 36.937874] ? __pfx___split_vma+0x10/0x10 [ 36.938390] ? find_held_lock+0x2c/0x110 [ 36.938908] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.939470] ? lock_is_held_type+0x9f/0x120 [ 36.940012] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.940637] ? mtree_range_walk+0x632/0x900 [ 36.941184] ? mas_walk+0x5c7/0x7c0 [ 36.941653] do_vmi_munmap+0x1f1/0x2b0 [ 36.942134] mmap_region+0x1f9/0x2660 [ 36.942610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.943109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.943835] ? __pfx_lock_acquire+0x10/0x10 [ 36.944391] ? __pfx_mmap_region+0x10/0x10 [ 36.944917] ? security_mmap_addr+0x7d/0xa0 [ 36.945452] ? get_unmapped_area+0x1f5/0x3f0 [ 36.946005] do_mmap+0x854/0xf00 [ 36.946440] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.946944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.947503] ksys_mmap_pgoff+0x3af/0x500 [ 36.948035] do_syscall_64+0x3f/0x90 [ 36.948564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.949256] RIP: 0033:0x7f6d68bbdd82 [ 36.949750] 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 [ 36.952043] RSP: 002b:00007ffcd379f0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.953035] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d68bbdd82 [ 36.953943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d67ff7000 [ 36.954850] RBP: 00007f6d67ff7000 R08: 0000000000000009 R09: 0000000000001000 [ 36.955781] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2cddc5b20 [ 36.956711] R13: 00007ffcd379f0f0 R14: 00007ffcd379f120 R15: 00007ffcd379f480 [ 36.957634] [ 36.957951] [ 36.958188] Allocated by task 213: [ 36.958653] kasan_save_stack+0x22/0x50 [ 36.959198] kasan_set_track+0x25/0x30 [ 36.959732] __kasan_slab_alloc+0x59/0x70 [ 36.960320] kmem_cache_alloc+0x16b/0x370 [ 36.960875] vm_area_dup+0x20/0x160 [ 36.961368] __split_vma+0x170/0x950 [ 36.961863] split_vma+0xc6/0x110 [ 36.962334] mprotect_fixup+0x8d2/0xb30 [ 36.962868] do_mprotect_pkey+0x87e/0xd40 [ 36.963428] __x64_sys_mprotect+0x78/0xc0 [ 36.963990] do_syscall_64+0x3f/0x90 [ 36.964513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.965215] [ 36.965452] Freed by task 202: [ 36.965877] kasan_save_stack+0x22/0x50 [ 36.966432] kasan_set_track+0x25/0x30 [ 36.966964] kasan_save_free_info+0x2b/0x50 [ 36.967534] __kasan_slab_free+0x10a/0x190 [ 36.968106] kmem_cache_free+0x10d/0x4d0 [ 36.968682] rcu_core+0x8c8/0x2860 [ 36.969158] __do_softirq+0x1b7/0x7d4 [ 36.969669] [ 36.969903] Last potentially related work creation: [ 36.970537] kasan_save_stack+0x22/0x50 [ 36.971088] __kasan_record_aux_stack+0x8e/0xa0 [ 36.971705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.972422] remove_vma+0x139/0x170 [ 36.972910] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.973509] do_vmi_munmap+0x1f1/0x2b0 [ 36.974029] __vm_munmap+0x138/0x3a0 [ 36.974536] __x64_sys_munmap+0x59/0x80 [ 36.975070] do_syscall_64+0x3f/0x90 [ 36.975572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.976276] [ 36.976517] The buggy address belongs to the object at ffff88800e6e5910 [ 36.976517] which belongs to the cache vm_area_struct of size 168 [ 36.978102] The buggy address is located 88 bytes inside of [ 36.978102] freed 168-byte region [ffff88800e6e5910, ffff88800e6e59b8) [ 36.979592] [ 36.979834] The buggy address belongs to the physical page: [ 36.980568] page:00000000ad7f87ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6e5 [ 36.981726] memcg:ffff88800eb2af01 [ 36.982186] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.982877] page_type: 0xffffffff() [ 36.983361] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.984365] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb2af01 [ 36.985344] page dumped because: kasan: bad access detected [ 36.986062] [ 36.986293] Memory state around the buggy address: [ 36.986925] ffff88800e6e5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.987835] ffff88800e6e5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.988769] >ffff88800e6e5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.989681] ^ [ 36.990520] ffff88800e6e5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.991452] ffff88800e6e5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.992327] ================================================================== [ 36.993293] Disabling lock debugging due to kernel taint [ 38.974826] BUG: Bad rss-counter state mm:000000001469c35d type:MM_FILEPAGES val:33 [ 38.975885] BUG: Bad rss-counter state mm:000000001469c35d type:MM_ANONPAGES val:22 [ 39.545895] BUG: Bad rss-counter state mm:00000000e0863559 type:MM_FILEPAGES val:33 [ 39.547054] BUG: Bad rss-counter state mm:00000000e0863559 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51823' (ECDSA) to the list of known hosts. 2023/06/19 13:33:17 fuzzer started 2023/06/19 13:33:17 dialing manager at localhost:44161 2023/06/19 13:33:17 checking machine... 2023/06/19 13:33:17 checking revisions... [ 40.194791] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:33:17 testing simple program... [ 40.239066] cgroup: Unknown subsys name 'net' [ 40.303562] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fac2aac5610 CR3=000000000f4f6000 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=fa34956b13625da0b3413e572c661b2a XMM02=000000000011e4a8ec2efd57dc4c00df XMM03=000000000012528869507e81363a996f XMM04=086f823b4a64a04900000000000ae988 XMM05=19e9129bd510f2350000000000134e30 XMM06=e18877cdab11d8340000000000133c98 XMM07=e042d86d42eb936e0000000000125508 XMM08=69507e81363a996f000000000011e508 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=00007fa89fb340b0 CR3=000000000e168000 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=2036313a33333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000