syzkaller login: [ 31.636755] BUG: Bad rss-counter state mm:000000003af49f38 type:MM_FILEPAGES val:33 [ 31.637921] BUG: Bad rss-counter state mm:000000003af49f38 type:MM_ANONPAGES val:22 [ 31.672581] ================================================================== [ 31.673631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.674665] Read of size 8 at addr ffff8880194df798 by task sshd/226 [ 31.675558] [ 31.675773] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.676757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.677812] Call Trace: [ 31.678202] [ 31.678494] dump_stack_lvl+0x91/0xf0 [ 31.679043] print_report+0xcc/0x620 [ 31.679548] ? __virt_addr_valid+0x102/0x340 [ 31.680210] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.680827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.681442] kasan_report+0xbe/0xf0 [ 31.681917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682528] vma_interval_tree_remove+0xc75/0xec0 [ 31.683132] vma_prepare+0xc54/0x11a0 [ 31.683616] __split_vma+0x5af/0x950 [ 31.684090] ? __pfx___split_vma+0x10/0x10 [ 31.684613] ? find_held_lock+0x2c/0x110 [ 31.685133] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.685689] ? lock_is_held_type+0x9f/0x120 [ 31.686227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.686831] ? mtree_range_walk+0x632/0x900 [ 31.687392] ? mas_walk+0x5c7/0x7c0 [ 31.687870] do_vmi_munmap+0x1f1/0x2b0 [ 31.688365] mmap_region+0x1f9/0x2660 [ 31.688847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.689360] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.690070] ? __pfx_lock_acquire+0x10/0x10 [ 31.690601] ? __pfx_mmap_region+0x10/0x10 [ 31.691134] ? security_mmap_addr+0x7d/0xa0 [ 31.691672] ? get_unmapped_area+0x1f5/0x3f0 [ 31.692215] do_mmap+0x854/0xf00 [ 31.692649] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.693143] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.693707] ksys_mmap_pgoff+0x3af/0x500 [ 31.694210] do_syscall_64+0x3f/0x90 [ 31.694690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695344] RIP: 0033:0x7fc78c942d82 [ 31.695797] 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 [ 31.697905] RSP: 002b:00007ffe55cf7408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.698793] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc78c942d82 [ 31.699653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc78bd7c000 [ 31.700503] RBP: 00007fc78bd7c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.701508] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561da4ef5f70 [ 31.702352] R13: 00007ffe55cf7420 R14: 00007ffe55cf7450 R15: 00007ffe55cf77b0 [ 31.703207] [ 31.703523] [ 31.703742] Allocated by task 219: [ 31.704168] kasan_save_stack+0x22/0x50 [ 31.704670] kasan_set_track+0x25/0x30 [ 31.705158] __kasan_slab_alloc+0x59/0x70 [ 31.705679] kmem_cache_alloc+0x16b/0x370 [ 31.706189] vm_area_dup+0x20/0x160 [ 31.706638] __split_vma+0x170/0x950 [ 31.707108] split_vma+0xc6/0x110 [ 31.707561] mprotect_fixup+0x8d2/0xb30 [ 31.708059] do_mprotect_pkey+0x87e/0xd40 [ 31.708581] __x64_sys_mprotect+0x78/0xc0 [ 31.709102] do_syscall_64+0x3f/0x90 [ 31.709570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.710210] [ 31.710424] Freed by task 204: [ 31.710815] kasan_save_stack+0x22/0x50 [ 31.711322] kasan_set_track+0x25/0x30 [ 31.711821] kasan_save_free_info+0x2b/0x50 [ 31.712354] __kasan_slab_free+0x10a/0x190 [ 31.712881] kmem_cache_free+0x10d/0x4d0 [ 31.713392] rcu_core+0x8c8/0x2860 [ 31.713834] __do_softirq+0x1b7/0x7d4 [ 31.714311] [ 31.714530] Last potentially related work creation: [ 31.715112] kasan_save_stack+0x22/0x50 [ 31.715620] __kasan_record_aux_stack+0x8e/0xa0 [ 31.716188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.716829] remove_vma+0x139/0x170 [ 31.717283] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.717834] do_vmi_munmap+0x1f1/0x2b0 [ 31.718316] __vm_munmap+0x138/0x3a0 [ 31.718776] __x64_sys_munmap+0x59/0x80 [ 31.719293] do_syscall_64+0x3f/0x90 [ 31.719768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.720409] [ 31.720624] The buggy address belongs to the object at ffff8880194df740 [ 31.720624] which belongs to the cache vm_area_struct of size 168 [ 31.722079] The buggy address is located 88 bytes inside of [ 31.722079] freed 168-byte region [ffff8880194df740, ffff8880194df7e8) [ 31.723493] [ 31.723709] The buggy address belongs to the physical page: [ 31.724365] page:000000006cf40bd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x194df [ 31.725454] memcg:ffff88800c660901 [ 31.725875] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.726518] page_type: 0xffffffff() [ 31.726971] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.727893] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c660901 [ 31.728813] page dumped because: kasan: bad access detected [ 31.729463] [ 31.729682] Memory state around the buggy address: [ 31.730262] ffff8880194df680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.731113] ffff8880194df700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.731982] >ffff8880194df780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.732828] ^ [ 31.733311] ffff8880194df800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.734153] ffff8880194df880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.734998] ================================================================== [ 31.736027] Disabling lock debugging due to kernel taint [ 33.677795] BUG: Bad rss-counter state mm:00000000d15219db type:MM_FILEPAGES val:33 [ 33.678869] BUG: Bad rss-counter state mm:00000000d15219db type:MM_ANONPAGES val:22 [ 34.253293] BUG: Bad rss-counter state mm:000000008b2690fd type:MM_FILEPAGES val:33 [ 34.254479] BUG: Bad rss-counter state mm:000000008b2690fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62425' (ECDSA) to the list of known hosts. 2023/06/20 21:22:58 fuzzer started 2023/06/20 21:22:58 dialing manager at localhost:36067 2023/06/20 21:22:58 checking machine... 2023/06/20 21:22:58 checking revisions... [ 34.909566] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:22:58 testing simple program... [ 34.957076] cgroup: Unknown subsys name 'net' [ 34.992701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:22:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffcb1987758 CR3=000000000f666000 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=2037353a32323a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81935c89 RDX=0000000000000001 RSI=0000000000000001 RDI=0000000000000006 RBP=ffff888016753438 RSP=ffff88800d99f9b0 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6d53 R12=ffff888016753510 R13=0000000000000001 R14=0000000000000001 R15=ffff888016753438 RIP=ffffffff814c0249 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f65e1ebf900 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=00007f65e132ad50 CR3=000000001457a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8ea80fe4ab4742cc00000000000ae988 XMM05=97641ca7763eba700000000000132c30 XMM06=13e856d8d71426c800000000001316b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000