syzkaller login: [ 55.675760] BUG: Bad rss-counter state mm:000000006dfae593 type:MM_FILEPAGES val:33 [ 55.676509] BUG: Bad rss-counter state mm:000000006dfae593 type:MM_ANONPAGES val:22 [ 55.706724] ================================================================== [ 55.707487] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.708238] Read of size 8 at addr ffff888016ae76b0 by task sshd/220 [ 55.708873] [ 55.709032] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.709646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.710434] Call Trace: [ 55.710657] [ 55.710855] dump_stack_lvl+0x91/0xf0 [ 55.711369] print_report+0xcc/0x620 [ 55.711687] ? __virt_addr_valid+0x102/0x340 [ 55.712076] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.712484] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.712894] kasan_report+0xbe/0xf0 [ 55.713207] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.713626] vma_interval_tree_remove+0xc75/0xec0 [ 55.714038] vma_prepare+0xc54/0x11a0 [ 55.714359] __split_vma+0x5af/0x950 [ 55.714674] ? __pfx___split_vma+0x10/0x10 [ 55.715031] ? find_held_lock+0x2c/0x110 [ 55.715374] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.715746] ? lock_is_held_type+0x9f/0x120 [ 55.716156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.716580] ? mtree_range_walk+0x632/0x900 [ 55.716957] ? mas_walk+0x5c7/0x7c0 [ 55.717297] do_vmi_munmap+0x1f1/0x2b0 [ 55.717659] mmap_region+0x1f9/0x2660 [ 55.718012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.718380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.718878] ? __pfx_lock_acquire+0x10/0x10 [ 55.719230] ? __pfx_mmap_region+0x10/0x10 [ 55.719596] ? security_mmap_addr+0x7d/0xa0 [ 55.719984] ? get_unmapped_area+0x1f5/0x3f0 [ 55.720365] do_mmap+0x854/0xf00 [ 55.720674] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.721009] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.721396] ksys_mmap_pgoff+0x3af/0x500 [ 55.721756] do_syscall_64+0x3f/0x90 [ 55.722088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.722535] RIP: 0033:0x7f94e1982d82 [ 55.722856] 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 [ 55.724340] RSP: 002b:00007ffd491303d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.725003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94e1982d82 [ 55.725620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94e0dbc000 [ 55.726214] RBP: 00007f94e0dbc000 R08: 0000000000000009 R09: 0000000000001000 [ 55.726831] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558793fc8ec0 [ 55.727417] R13: 00007ffd491303f0 R14: 00007ffd49130420 R15: 00007ffd49130780 [ 55.728011] [ 55.728167] [ 55.728280] Allocated by task 213: [ 55.728504] kasan_save_stack+0x22/0x50 [ 55.728773] kasan_set_track+0x25/0x30 [ 55.729028] __kasan_slab_alloc+0x59/0x70 [ 55.729304] kmem_cache_alloc+0x16b/0x370 [ 55.729571] vm_area_dup+0x20/0x160 [ 55.729805] __split_vma+0x170/0x950 [ 55.730048] split_vma+0xc6/0x110 [ 55.730279] mprotect_fixup+0x8d2/0xb30 [ 55.730542] do_mprotect_pkey+0x87e/0xd40 [ 55.730813] __x64_sys_mprotect+0x78/0xc0 [ 55.731086] do_syscall_64+0x3f/0x90 [ 55.731334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.731668] [ 55.731780] Freed by task 213: [ 55.732000] kasan_save_stack+0x22/0x50 [ 55.732267] kasan_set_track+0x25/0x30 [ 55.732524] kasan_save_free_info+0x2b/0x50 [ 55.732803] __kasan_slab_free+0x10a/0x190 [ 55.733080] kmem_cache_free+0x10d/0x4d0 [ 55.733346] rcu_core+0x8c8/0x2860 [ 55.733580] __do_softirq+0x1b7/0x7d4 [ 55.733830] [ 55.733944] Last potentially related work creation: [ 55.734253] kasan_save_stack+0x22/0x50 [ 55.734514] __kasan_record_aux_stack+0x8e/0xa0 [ 55.734812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.735149] remove_vma+0x139/0x170 [ 55.735384] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.735673] do_vmi_munmap+0x1f1/0x2b0 [ 55.736016] __vm_munmap+0x138/0x3a0 [ 55.736327] __x64_sys_munmap+0x59/0x80 [ 55.736685] do_syscall_64+0x3f/0x90 [ 55.737024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.737485] [ 55.737638] The buggy address belongs to the object at ffff888016ae7658 [ 55.737638] which belongs to the cache vm_area_struct of size 168 [ 55.738646] The buggy address is located 88 bytes inside of [ 55.738646] freed 168-byte region [ffff888016ae7658, ffff888016ae7700) [ 55.739629] [ 55.739778] The buggy address belongs to the physical page: [ 55.740231] page:000000000df7875c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ae7 [ 55.740967] memcg:ffff88800c625901 [ 55.741254] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.741683] page_type: 0xffffffff() [ 55.741983] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 55.742627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c625901 [ 55.743274] page dumped because: kasan: bad access detected [ 55.743733] [ 55.743905] Memory state around the buggy address: [ 55.744308] ffff888016ae7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.744909] ffff888016ae7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 55.745506] >ffff888016ae7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.746112] ^ [ 55.746525] ffff888016ae7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 55.747127] ffff888016ae7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 55.747721] ================================================================== [ 55.748420] Disabling lock debugging due to kernel taint [ 57.343054] BUG: Bad rss-counter state mm:00000000468705ae type:MM_FILEPAGES val:33 [ 57.343733] BUG: Bad rss-counter state mm:00000000468705ae type:MM_ANONPAGES val:22 [ 57.743090] BUG: Bad rss-counter state mm:0000000075bc489d type:MM_FILEPAGES val:33 [ 57.743774] BUG: Bad rss-counter state mm:0000000075bc489d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41744' (ECDSA) to the list of known hosts. 2023/06/20 09:38:19 fuzzer started 2023/06/20 09:38:19 dialing manager at localhost:44161 2023/06/20 09:38:19 checking machine... 2023/06/20 09:38:19 checking revisions... [ 58.217879] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:38:19 testing simple program... [ 58.249172] cgroup: Unknown subsys name 'net' [ 58.291855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:37:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1354 RSI=ffff88806ce09e10 RDI=ffff88806ce09aa0 RBP=ffff88806ce09e10 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09e10 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 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=00007ffcb4426ff8 CR3=000000000e8b0000 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=2039313a38333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a38333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000cf17133e RCX=ffff88806c7899f0 RDX=000000000000000c RSI=0000000000000003 RDI=000000004929e1c3 RBP=ffff888013e0d600 RSP=ffff88800ed6f9a8 R8 =000000005b68f2ef R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800ed6fa10 R15=000000000000000c RIP=ffffffff82270f2d 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 00007fa015e4f900 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=00007fa016406618 CR3=000000000e388000 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=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