syzkaller login: [ 31.214366] BUG: Bad rss-counter state mm:0000000056fb4f50 type:MM_FILEPAGES val:33 [ 31.214946] BUG: Bad rss-counter state mm:0000000056fb4f50 type:MM_ANONPAGES val:22 [ 31.321736] ================================================================== [ 31.322838] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.323609] Read of size 8 at addr ffff88800eeacd08 by task sshd/220 [ 31.324193] [ 31.324495] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.325175] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.325924] Call Trace: [ 31.326170] [ 31.326387] dump_stack_lvl+0x91/0xf0 [ 31.326784] print_report+0xcc/0x620 [ 31.327155] ? __virt_addr_valid+0x102/0x340 [ 31.327577] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328050] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328522] kasan_report+0xbe/0xf0 [ 31.328885] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.329361] vma_interval_tree_remove+0xc75/0xec0 [ 31.329836] vma_prepare+0xc54/0x11a0 [ 31.330202] __split_vma+0x5af/0x950 [ 31.330569] ? __pfx___split_vma+0x10/0x10 [ 31.330974] ? find_held_lock+0x2c/0x110 [ 31.331372] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.331801] ? lock_is_held_type+0x9f/0x120 [ 31.332217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.332684] ? mtree_range_walk+0x632/0x900 [ 31.333116] ? mas_walk+0x5c7/0x7c0 [ 31.333481] do_vmi_munmap+0x1f1/0x2b0 [ 31.333882] mmap_region+0x1f9/0x2660 [ 31.334260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.334653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.335215] ? __pfx_lock_acquire+0x10/0x10 [ 31.335611] ? __pfx_mmap_region+0x10/0x10 [ 31.335910] ? security_mmap_addr+0x7d/0xa0 [ 31.336214] ? get_unmapped_area+0x1f5/0x3f0 [ 31.336526] do_mmap+0x854/0xf00 [ 31.336776] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.337062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.337379] ksys_mmap_pgoff+0x3af/0x500 [ 31.337662] do_syscall_64+0x3f/0x90 [ 31.337939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338308] RIP: 0033:0x7fd4c84a7d82 [ 31.338577] 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 [ 31.339783] RSP: 002b:00007ffe48a784d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.340301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4c84a7d82 [ 31.340785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4c78e1000 [ 31.341274] RBP: 00007fd4c78e1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.341757] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9a8e59ec0 [ 31.342254] R13: 00007ffe48a784f0 R14: 00007ffe48a78520 R15: 00007ffe48a78880 [ 31.342751] [ 31.342920] [ 31.343042] Allocated by task 213: [ 31.343289] kasan_save_stack+0x22/0x50 [ 31.343575] kasan_set_track+0x25/0x30 [ 31.343857] __kasan_slab_alloc+0x59/0x70 [ 31.344165] kmem_cache_alloc+0x16b/0x370 [ 31.344465] vm_area_dup+0x20/0x160 [ 31.344729] __split_vma+0x170/0x950 [ 31.344990] split_vma+0xc6/0x110 [ 31.345239] mprotect_fixup+0x8d2/0xb30 [ 31.345522] do_mprotect_pkey+0x87e/0xd40 [ 31.345832] __x64_sys_mprotect+0x78/0xc0 [ 31.346132] do_syscall_64+0x3f/0x90 [ 31.346399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346762] [ 31.346887] Freed by task 0: [ 31.347110] kasan_save_stack+0x22/0x50 [ 31.347400] kasan_set_track+0x25/0x30 [ 31.347682] kasan_save_free_info+0x2b/0x50 [ 31.347985] __kasan_slab_free+0x10a/0x190 [ 31.348286] kmem_cache_free+0x10d/0x4d0 [ 31.348580] rcu_core+0x8c8/0x2860 [ 31.348840] __do_softirq+0x1b7/0x7d4 [ 31.349113] [ 31.349232] Last potentially related work creation: [ 31.349569] kasan_save_stack+0x22/0x50 [ 31.349857] __kasan_record_aux_stack+0x8e/0xa0 [ 31.350199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.350559] remove_vma+0x139/0x170 [ 31.350809] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.351126] do_vmi_munmap+0x1f1/0x2b0 [ 31.351400] __vm_munmap+0x138/0x3a0 [ 31.351668] __x64_sys_munmap+0x59/0x80 [ 31.351952] do_syscall_64+0x3f/0x90 [ 31.352220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.352580] [ 31.352700] Second to last potentially related work creation: [ 31.353088] kasan_save_stack+0x22/0x50 [ 31.353375] __kasan_record_aux_stack+0x8e/0xa0 [ 31.353699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.354064] remove_vma+0x139/0x170 [ 31.354315] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.354633] do_vmi_munmap+0x1f1/0x2b0 [ 31.354905] mmap_region+0x1f9/0x2660 [ 31.355181] do_mmap+0x854/0xf00 [ 31.355432] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.355710] ksys_mmap_pgoff+0x3af/0x500 [ 31.355995] do_syscall_64+0x3f/0x90 [ 31.356263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.356622] [ 31.356744] The buggy address belongs to the object at ffff88800eeaccb0 [ 31.356744] which belongs to the cache vm_area_struct of size 168 [ 31.357567] The buggy address is located 88 bytes inside of [ 31.357567] freed 168-byte region [ffff88800eeaccb0, ffff88800eeacd58) [ 31.358396] [ 31.358524] The buggy address belongs to the physical page: [ 31.358902] page:00000000c3dd4ef4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeac [ 31.359536] memcg:ffff88800db1a301 [ 31.359775] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.360143] page_type: 0xffffffff() [ 31.360404] raw: 0100000000000200 ffff88800879fc80 ffffea00003afb40 dead000000000004 [ 31.360926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db1a301 [ 31.361449] page dumped because: kasan: bad access detected [ 31.361839] [ 31.361960] Memory state around the buggy address: [ 31.362298] ffff88800eeacc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.362784] ffff88800eeacc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.363279] >ffff88800eeacd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.363767] ^ [ 31.364023] ffff88800eeacd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.364507] ffff88800eeace00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.364992] ================================================================== [ 31.365595] Disabling lock debugging due to kernel taint [ 33.406112] BUG: Bad rss-counter state mm:00000000f777b853 type:MM_FILEPAGES val:33 [ 33.407248] BUG: Bad rss-counter state mm:00000000f777b853 type:MM_ANONPAGES val:22 [ 33.770443] BUG: Bad rss-counter state mm:00000000ee06ec2a type:MM_FILEPAGES val:33 [ 33.771880] BUG: Bad rss-counter state mm:00000000ee06ec2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1731' (ECDSA) to the list of known hosts. 2023/06/20 07:03:57 fuzzer started 2023/06/20 07:03:58 dialing manager at localhost:44161 2023/06/20 07:03:58 checking machine... 2023/06/20 07:03:58 checking revisions... [ 34.515711] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:03:58 testing simple program... [ 34.567204] cgroup: Unknown subsys name 'net' [ 34.627365] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:03:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019934000 RCX=0000000000000000 RDX=ffff888016751b40 RSI=ffffffff818dcc1f RDI=ffff888019934000 RBP=0000000000000000 RSP=ffff88801ce0fc48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880199341b8 R13=ffff8880199341a8 R14=ffff888019934088 R15=ffff8880199340d8 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 00007fb6dc194900 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=00007fb6dc74b618 CR3=00000000183d6000 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=563412feff00545000000000000080fe 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=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=00007f43d040a1f0 CR3=0000000019f7a000 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=2037353a33303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a33303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000