syzkaller login: [ 35.833046] BUG: Bad rss-counter state mm:00000000a502fe70 type:MM_FILEPAGES val:33 [ 35.834294] BUG: Bad rss-counter state mm:00000000a502fe70 type:MM_ANONPAGES val:22 [ 35.872478] ================================================================== [ 35.873529] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.874460] Read of size 8 at addr ffff8880099b1968 by task sshd/220 [ 35.875224] [ 35.875443] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.876301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.877296] Call Trace: [ 35.877619] [ 35.877903] dump_stack_lvl+0x91/0xf0 [ 35.878395] print_report+0xcc/0x620 [ 35.878878] ? __virt_addr_valid+0x102/0x340 [ 35.879444] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.880062] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.880685] kasan_report+0xbe/0xf0 [ 35.881162] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.881782] vma_interval_tree_remove+0xc75/0xec0 [ 35.882397] vma_prepare+0xc54/0x11a0 [ 35.882876] __split_vma+0x5af/0x950 [ 35.883357] ? __pfx___split_vma+0x10/0x10 [ 35.883887] ? find_held_lock+0x2c/0x110 [ 35.884410] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.885003] ? lock_is_held_type+0x9f/0x120 [ 35.885549] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.886160] ? mtree_range_walk+0x632/0x900 [ 35.886721] ? mas_walk+0x5c7/0x7c0 [ 35.887203] do_vmi_munmap+0x1f1/0x2b0 [ 35.887701] mmap_region+0x1f9/0x2660 [ 35.888186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.888710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.889423] ? __pfx_lock_acquire+0x10/0x10 [ 35.889955] ? __pfx_mmap_region+0x10/0x10 [ 35.890483] ? security_mmap_addr+0x7d/0xa0 [ 35.891022] ? get_unmapped_area+0x1f5/0x3f0 [ 35.891574] do_mmap+0x854/0xf00 [ 35.892012] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.892512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.893081] ksys_mmap_pgoff+0x3af/0x500 [ 35.893591] do_syscall_64+0x3f/0x90 [ 35.894069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.894721] RIP: 0033:0x7f7a9da78d82 [ 35.895177] 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 [ 35.897309] RSP: 002b:00007ffc4093fad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.898218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a9da78d82 [ 35.899081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a9ceb2000 [ 35.899950] RBP: 00007f7a9ceb2000 R08: 0000000000000009 R09: 0000000000001000 [ 35.900815] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d2cc88b20 [ 35.901687] R13: 00007ffc4093faf0 R14: 00007ffc4093fb20 R15: 00007ffc4093fe80 [ 35.902550] [ 35.902849] [ 35.903073] Allocated by task 213: [ 35.903513] kasan_save_stack+0x22/0x50 [ 35.904018] kasan_set_track+0x25/0x30 [ 35.904520] __kasan_slab_alloc+0x59/0x70 [ 35.905049] kmem_cache_alloc+0x16b/0x370 [ 35.905571] vm_area_dup+0x20/0x160 [ 35.906030] __split_vma+0x170/0x950 [ 35.906504] split_vma+0xc6/0x110 [ 35.906947] mprotect_fixup+0x8d2/0xb30 [ 35.907452] do_mprotect_pkey+0x87e/0xd40 [ 35.907979] __x64_sys_mprotect+0x78/0xc0 [ 35.908522] do_syscall_64+0x3f/0x90 [ 35.909000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.909646] [ 35.909863] Freed by task 213: [ 35.910261] kasan_save_stack+0x22/0x50 [ 35.910768] kasan_set_track+0x25/0x30 [ 35.911264] kasan_save_free_info+0x2b/0x50 [ 35.911797] __kasan_slab_free+0x10a/0x190 [ 35.912331] kmem_cache_free+0x10d/0x4d0 [ 35.912851] rcu_core+0x8c8/0x2860 [ 35.913302] __do_softirq+0x1b7/0x7d4 [ 35.913790] [ 35.914004] Last potentially related work creation: [ 35.914598] kasan_save_stack+0x22/0x50 [ 35.915106] __kasan_record_aux_stack+0x8e/0xa0 [ 35.915683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.916332] remove_vma+0x139/0x170 [ 35.916802] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.917360] do_vmi_munmap+0x1f1/0x2b0 [ 35.917855] __vm_munmap+0x138/0x3a0 [ 35.918324] __x64_sys_munmap+0x59/0x80 [ 35.918823] do_syscall_64+0x3f/0x90 [ 35.919300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.919941] [ 35.920155] Second to last potentially related work creation: [ 35.920855] kasan_save_stack+0x22/0x50 [ 35.921365] __kasan_record_aux_stack+0x8e/0xa0 [ 35.921940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.922590] remove_vma+0x139/0x170 [ 35.923044] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.923600] do_vmi_munmap+0x1f1/0x2b0 [ 35.924085] mmap_region+0x1f9/0x2660 [ 35.924584] do_mmap+0x854/0xf00 [ 35.925016] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.925505] ksys_mmap_pgoff+0x3af/0x500 [ 35.926018] do_syscall_64+0x3f/0x90 [ 35.926495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.927136] [ 35.927354] The buggy address belongs to the object at ffff8880099b1910 [ 35.927354] which belongs to the cache vm_area_struct of size 168 [ 35.928824] The buggy address is located 88 bytes inside of [ 35.928824] freed 168-byte region [ffff8880099b1910, ffff8880099b19b8) [ 35.930233] [ 35.930450] The buggy address belongs to the physical page: [ 35.931105] page:0000000057567c6e refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880099b19f8 pfn:0x99b1 [ 35.932351] memcg:ffff88800dfb2501 [ 35.932805] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.933452] page_type: 0xffffffff() [ 35.933903] raw: 0100000000000200 ffff88800879fc80 ffffea0000362f50 ffffea0000512f50 [ 35.934825] raw: ffff8880099b19f8 000000000011000f 00000001ffffffff ffff88800dfb2501 [ 35.935741] page dumped because: kasan: bad access detected [ 35.936402] [ 35.936629] Memory state around the buggy address: [ 35.937216] ffff8880099b1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.938068] ffff8880099b1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.938921] >ffff8880099b1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.939767] ^ [ 35.940562] ffff8880099b1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fb [ 35.941415] ffff8880099b1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.942270] ================================================================== [ 35.943309] Disabling lock debugging due to kernel taint [ 37.893210] BUG: Bad rss-counter state mm:00000000e9a1a559 type:MM_FILEPAGES val:33 [ 37.894794] BUG: Bad rss-counter state mm:00000000e9a1a559 type:MM_ANONPAGES val:22 [ 38.336420] BUG: Bad rss-counter state mm:000000009c7740ed type:MM_FILEPAGES val:33 [ 38.337412] BUG: Bad rss-counter state mm:000000009c7740ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29951' (ECDSA) to the list of known hosts. 2023/06/19 19:44:56 fuzzer started 2023/06/19 19:44:56 dialing manager at localhost:44161 2023/06/19 19:44:56 checking machine... 2023/06/19 19:44:56 checking revisions... [ 39.070601] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:44:57 testing simple program... [ 39.112222] cgroup: Unknown subsys name 'net' [ 39.154042] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:44:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002d55fbe RCX=0000000000000000 RDX=ffff88800fea9b40 RSI=ffffffff83637563 RDI=0000000000000005 RBP=ffff888016aafe30 RSP=ffff888016aafdb8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000000 R12=000000000000000c R13=00007fff308b4198 R14=000000000000000c R15=0000000000000000 RIP=ffffffff814c081b 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 00007f3ccb23e900 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=00007f3ccb7f5618 CR3=000000001be74000 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=0000000000000001 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=00007ffc9275f638 CR3=000000000e34a000 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=2036353a34343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000