syzkaller login: [ 38.854669] BUG: Bad rss-counter state mm:000000002ccaa9e2 type:MM_FILEPAGES val:33 [ 38.855852] BUG: Bad rss-counter state mm:000000002ccaa9e2 type:MM_ANONPAGES val:22 [ 38.894392] ================================================================== [ 38.895436] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.896510] Read of size 8 at addr ffff88800dffd3f8 by task sshd/218 [ 38.897394] [ 38.897668] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.898605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.899651] Call Trace: [ 38.900016] [ 38.900305] dump_stack_lvl+0x91/0xf0 [ 38.900799] print_report+0xcc/0x620 [ 38.901400] ? __virt_addr_valid+0x102/0x340 [ 38.901966] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902581] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903190] kasan_report+0xbe/0xf0 [ 38.903664] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904293] vma_interval_tree_remove+0xc75/0xec0 [ 38.904890] vma_prepare+0xc54/0x11a0 [ 38.905373] __split_vma+0x5af/0x950 [ 38.905846] ? __pfx___split_vma+0x10/0x10 [ 38.906372] ? find_held_lock+0x2c/0x110 [ 38.906889] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.907454] ? lock_is_held_type+0x9f/0x120 [ 38.907991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.908607] ? mtree_range_walk+0x632/0x900 [ 38.909158] ? mas_walk+0x5c7/0x7c0 [ 38.909635] do_vmi_munmap+0x1f1/0x2b0 [ 38.910127] mmap_region+0x1f9/0x2660 [ 38.910614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.911128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.911843] ? __pfx_lock_acquire+0x10/0x10 [ 38.912419] ? __pfx_mmap_region+0x10/0x10 [ 38.912942] ? security_mmap_addr+0x7d/0xa0 [ 38.913470] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914029] do_mmap+0x854/0xf00 [ 38.914463] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.914959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.915520] ksys_mmap_pgoff+0x3af/0x500 [ 38.916027] do_syscall_64+0x3f/0x90 [ 38.916522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917181] RIP: 0033:0x7f85f89b6d82 [ 38.917641] 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 [ 38.919778] RSP: 002b:00007fff20772108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.920704] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85f89b6d82 [ 38.921545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85f7df0000 [ 38.922389] RBP: 00007f85f7df0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.923235] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5f3006f70 [ 38.924095] R13: 00007fff20772120 R14: 00007fff20772150 R15: 00007fff207724b0 [ 38.924960] [ 38.925256] [ 38.925479] Allocated by task 211: [ 38.925909] kasan_save_stack+0x22/0x50 [ 38.926413] kasan_set_track+0x25/0x30 [ 38.926918] __kasan_slab_alloc+0x59/0x70 [ 38.927447] kmem_cache_alloc+0x16b/0x370 [ 38.927964] vm_area_dup+0x20/0x160 [ 38.928433] __split_vma+0x170/0x950 [ 38.928907] split_vma+0xc6/0x110 [ 38.929346] mprotect_fixup+0x8d2/0xb30 [ 38.929857] do_mprotect_pkey+0x87e/0xd40 [ 38.930378] __x64_sys_mprotect+0x78/0xc0 [ 38.930899] do_syscall_64+0x3f/0x90 [ 38.931377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932022] [ 38.932248] Freed by task 13: [ 38.932639] kasan_save_stack+0x22/0x50 [ 38.933144] kasan_set_track+0x25/0x30 [ 38.933637] kasan_save_free_info+0x2b/0x50 [ 38.934176] __kasan_slab_free+0x10a/0x190 [ 38.934712] kmem_cache_free+0x10d/0x4d0 [ 38.935215] rcu_core+0x8c8/0x2860 [ 38.935660] __do_softirq+0x1b7/0x7d4 [ 38.936154] [ 38.936369] Last potentially related work creation: [ 38.936954] kasan_save_stack+0x22/0x50 [ 38.937458] __kasan_record_aux_stack+0x8e/0xa0 [ 38.938037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.938678] remove_vma+0x139/0x170 [ 38.939194] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.939757] do_vmi_munmap+0x1f1/0x2b0 [ 38.940252] __vm_munmap+0x138/0x3a0 [ 38.940723] __x64_sys_munmap+0x59/0x80 [ 38.941222] do_syscall_64+0x3f/0x90 [ 38.941697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.942339] [ 38.942558] Second to last potentially related work creation: [ 38.943241] kasan_save_stack+0x22/0x50 [ 38.943747] __kasan_record_aux_stack+0x8e/0xa0 [ 38.944332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.944980] remove_vma+0x139/0x170 [ 38.945428] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.945991] do_vmi_munmap+0x1f1/0x2b0 [ 38.946480] mmap_region+0x1f9/0x2660 [ 38.946960] do_mmap+0x854/0xf00 [ 38.947395] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947883] ksys_mmap_pgoff+0x3af/0x500 [ 38.948400] do_syscall_64+0x3f/0x90 [ 38.948879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949518] [ 38.949739] The buggy address belongs to the object at ffff88800dffd3a0 [ 38.949739] which belongs to the cache vm_area_struct of size 168 [ 38.951216] The buggy address is located 88 bytes inside of [ 38.951216] freed 168-byte region [ffff88800dffd3a0, ffff88800dffd448) [ 38.952624] [ 38.952841] The buggy address belongs to the physical page: [ 38.953495] page:0000000057d3d55e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdffd [ 38.954580] memcg:ffff88800e44c601 [ 38.955018] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955663] page_type: 0xffffffff() [ 38.956130] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386680 dead000000000008 [ 38.957052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e44c601 [ 38.957963] page dumped because: kasan: bad access detected [ 38.958622] [ 38.958839] Memory state around the buggy address: [ 38.959421] ffff88800dffd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.960278] ffff88800dffd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.961130] >ffff88800dffd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.961984] ^ [ 38.962825] ffff88800dffd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.963691] ffff88800dffd480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.964557] ================================================================== [ 38.965555] Disabling lock debugging due to kernel taint [ 41.841071] BUG: Bad rss-counter state mm:0000000023652dc1 type:MM_FILEPAGES val:31 [ 41.842224] BUG: Bad rss-counter state mm:0000000023652dc1 type:MM_ANONPAGES val:22 [ 42.327415] BUG: Bad rss-counter state mm:0000000095c95665 type:MM_FILEPAGES val:33 [ 42.328579] BUG: Bad rss-counter state mm:0000000095c95665 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48535' (ECDSA) to the list of known hosts. 2023/06/21 07:21:20 fuzzer started 2023/06/21 07:21:20 dialing manager at localhost:36067 2023/06/21 07:21:20 checking machine... 2023/06/21 07:21:20 checking revisions... [ 42.993913] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:21:20 testing simple program... [ 43.031412] cgroup: Unknown subsys name 'net' [ 43.082625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:21:20 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=000000000000000b RCX=0000000000000001 RDX=0000000000000cc0 RSI=000000000000000c RDI=ffff888019e2fab8 RBP=dffffc0000000000 RSP=ffff888019e2f9d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000c R13=0000000000000cc0 R14=ffff888019e2fa60 R15=0000000000000cc0 RIP=ffffffff813ad651 RFL=00000202 [-------] 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 00007f40778fc900 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=00007f4077eb3618 CR3=000000000e3e4000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f4a3e637000 CR3=00000000097ba000 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=393ea8e677cff79a904ceb2360c68899 XMM02=ec2efd57dc4c00df000000000011b780 XMM03=5bd3699745564c14000000000011b850 XMM04=7f6e2c93ba0e10c800000000000ae988 XMM05=614b958013370aaa0000000000134868 XMM06=806171799158d9670000000000133908 XMM07=e042d86d42eb936e0000000000122468 XMM08=5bd3699745564c14000000000011b850 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000