syzkaller login: [ 31.282817] BUG: Bad rss-counter state mm:00000000db6fc472 type:MM_FILEPAGES val:33 [ 31.283837] BUG: Bad rss-counter state mm:00000000db6fc472 type:MM_ANONPAGES val:22 [ 31.318641] ================================================================== [ 31.319492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.320383] Read of size 8 at addr ffff8880182dced8 by task sshd/220 [ 31.321096] [ 31.321300] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.322317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.323222] Call Trace: [ 31.323528] [ 31.323814] dump_stack_lvl+0x91/0xf0 [ 31.324273] print_report+0xcc/0x620 [ 31.324723] ? __virt_addr_valid+0x102/0x340 [ 31.325234] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.325806] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.326380] kasan_report+0xbe/0xf0 [ 31.326822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327403] vma_interval_tree_remove+0xc75/0xec0 [ 31.327962] vma_prepare+0xc54/0x11a0 [ 31.328426] __split_vma+0x5af/0x950 [ 31.328867] ? __pfx___split_vma+0x10/0x10 [ 31.329364] ? find_held_lock+0x2c/0x110 [ 31.329847] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.330377] ? lock_is_held_type+0x9f/0x120 [ 31.330875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.331469] ? mtree_range_walk+0x632/0x900 [ 31.331984] ? mas_walk+0x5c7/0x7c0 [ 31.332431] do_vmi_munmap+0x1f1/0x2b0 [ 31.332886] mmap_region+0x1f9/0x2660 [ 31.333336] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.333818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.334478] ? __pfx_lock_acquire+0x10/0x10 [ 31.334974] ? __pfx_mmap_region+0x10/0x10 [ 31.335473] ? security_mmap_addr+0x7d/0xa0 [ 31.335965] ? get_unmapped_area+0x1f5/0x3f0 [ 31.336474] do_mmap+0x854/0xf00 [ 31.336878] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.337335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.337855] ksys_mmap_pgoff+0x3af/0x500 [ 31.338324] do_syscall_64+0x3f/0x90 [ 31.338775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.339387] RIP: 0033:0x7f3fe040bd82 [ 31.339823] 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 [ 31.341789] RSP: 002b:00007ffc4c2f2e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.342626] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3fe040bd82 [ 31.343433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3fdf845000 [ 31.344233] RBP: 00007f3fdf845000 R08: 0000000000000009 R09: 0000000000001000 [ 31.345015] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abecb8ad90 [ 31.345791] R13: 00007ffc4c2f2e20 R14: 00007ffc4c2f2e50 R15: 00007ffc4c2f31b0 [ 31.346585] [ 31.346853] [ 31.347051] Allocated by task 213: [ 31.347456] kasan_save_stack+0x22/0x50 [ 31.347924] kasan_set_track+0x25/0x30 [ 31.348383] __kasan_slab_alloc+0x59/0x70 [ 31.348872] kmem_cache_alloc+0x16b/0x370 [ 31.349361] vm_area_dup+0x20/0x160 [ 31.349792] __split_vma+0x170/0x950 [ 31.350243] split_vma+0xc6/0x110 [ 31.350649] mprotect_fixup+0x8d2/0xb30 [ 31.351116] do_mprotect_pkey+0x87e/0xd40 [ 31.351609] __x64_sys_mprotect+0x78/0xc0 [ 31.352101] do_syscall_64+0x3f/0x90 [ 31.352545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.353141] [ 31.353341] Freed by task 213: [ 31.353704] kasan_save_stack+0x22/0x50 [ 31.354176] kasan_set_track+0x25/0x30 [ 31.354641] kasan_save_free_info+0x2b/0x50 [ 31.355147] __kasan_slab_free+0x10a/0x190 [ 31.355651] kmem_cache_free+0x10d/0x4d0 [ 31.356118] rcu_core+0x8c8/0x2860 [ 31.356525] __do_softirq+0x1b7/0x7d4 [ 31.356975] [ 31.357177] Last potentially related work creation: [ 31.357728] kasan_save_stack+0x22/0x50 [ 31.358197] __kasan_record_aux_stack+0x8e/0xa0 [ 31.358728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.359341] remove_vma+0x139/0x170 [ 31.359759] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.360277] do_vmi_munmap+0x1f1/0x2b0 [ 31.360742] __vm_munmap+0x138/0x3a0 [ 31.361188] __x64_sys_munmap+0x59/0x80 [ 31.361664] do_syscall_64+0x3f/0x90 [ 31.362127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362740] [ 31.362945] The buggy address belongs to the object at ffff8880182dce80 [ 31.362945] which belongs to the cache vm_area_struct of size 168 [ 31.364686] The buggy address is located 88 bytes inside of [ 31.364686] freed 168-byte region [ffff8880182dce80, ffff8880182dcf28) [ 31.366539] [ 31.366751] The buggy address belongs to the physical page: [ 31.367441] page:000000002ba0bf70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182dc [ 31.368601] memcg:ffff888019466b01 [ 31.369020] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.369669] page_type: 0xffffffff() [ 31.370103] raw: 0100000000000200 ffff8880087a0c80 ffffea0000592080 dead000000000004 [ 31.370996] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019466b01 [ 31.371883] page dumped because: kasan: bad access detected [ 31.372521] [ 31.372729] Memory state around the buggy address: [ 31.373286] ffff8880182dcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.374121] ffff8880182dce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.374949] >ffff8880182dce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.375785] ^ [ 31.376483] ffff8880182dcf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.377313] ffff8880182dcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.378131] ================================================================== [ 31.379232] Disabling lock debugging due to kernel taint [ 33.354087] BUG: Bad rss-counter state mm:000000008aff14cd type:MM_FILEPAGES val:33 [ 33.355127] BUG: Bad rss-counter state mm:000000008aff14cd type:MM_ANONPAGES val:22 [ 33.842081] BUG: Bad rss-counter state mm:00000000da631678 type:MM_FILEPAGES val:33 [ 33.844418] BUG: Bad rss-counter state mm:00000000da631678 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39871' (ECDSA) to the list of known hosts. 2023/06/20 14:55:38 fuzzer started 2023/06/20 14:55:38 dialing manager at localhost:36067 2023/06/20 14:55:38 checking machine... 2023/06/20 14:55:38 checking revisions... [ 34.612043] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:55:38 testing simple program... [ 34.654569] cgroup: Unknown subsys name 'net' [ 34.703736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:55:38 Registers: info registers vcpu 0 RAX=000000000008a95e RBX=0000000000000001 RCX=ffffffff8363b5a6 RDX=000000000008a967 RSI=00000000000263b5 RDI=ffffffff863b3572 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b353c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a95e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130861 RFL=00000297 [--S-APC] 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 00007fb0e047b900 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=00007fb0e0a32618 CR3=0000000018138000 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=2037333a35353a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a35353a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff88800bbb8000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88800f59f7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed1001777001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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 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=00007f8c7b54ebc0 CR3=000000000c658000 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=4a8575a5629dc4b5804976c0df15d3f6 XMM02=2c67c8bc2e329bc3000000000011a910 XMM03=fb795ef6d65770560000000000121de8 XMM04=9790bee3ae76c62e00000000000ae988 XMM05=19e9129bd510f2350000000000131c28 XMM06=9c8aeb4d019d449a0000000000130a90 XMM07=e042d86d42eb936e0000000000122068 XMM08=18bf2f4deceda996000000000011a970 XMM09=00000000000000000000000000000000 XMM10=00000000002000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000