syzkaller login: [ 41.163727] BUG: Bad rss-counter state mm:00000000372a49b5 type:MM_FILEPAGES val:33 [ 41.165163] BUG: Bad rss-counter state mm:00000000372a49b5 type:MM_ANONPAGES val:22 [ 41.322851] ================================================================== [ 41.323929] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.325086] Read of size 8 at addr ffff88800a6d7ed8 by task sshd/224 [ 41.326026] [ 41.326434] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.327492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.328706] Call Trace: [ 41.329107] [ 41.329458] dump_stack_lvl+0x91/0xf0 [ 41.330049] print_report+0xcc/0x620 [ 41.330635] ? __virt_addr_valid+0x102/0x340 [ 41.331306] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.332057] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.332807] kasan_report+0xbe/0xf0 [ 41.333411] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.334081] vma_interval_tree_remove+0xc75/0xec0 [ 41.334687] vma_prepare+0xc54/0x11a0 [ 41.335175] __split_vma+0x5af/0x950 [ 41.335651] ? __pfx___split_vma+0x10/0x10 [ 41.336190] ? find_held_lock+0x2c/0x110 [ 41.336720] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.337333] ? lock_is_held_type+0x9f/0x120 [ 41.337876] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.338495] ? mtree_range_walk+0x632/0x900 [ 41.339047] ? mas_walk+0x5c7/0x7c0 [ 41.339523] do_vmi_munmap+0x1f1/0x2b0 [ 41.340027] mmap_region+0x1f9/0x2660 [ 41.340505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.341041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.341760] ? __pfx_lock_acquire+0x10/0x10 [ 41.342303] ? __pfx_mmap_region+0x10/0x10 [ 41.342838] ? security_mmap_addr+0x7d/0xa0 [ 41.343373] ? get_unmapped_area+0x1f5/0x3f0 [ 41.343932] do_mmap+0x854/0xf00 [ 41.344372] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.344868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.345452] ksys_mmap_pgoff+0x3af/0x500 [ 41.345963] do_syscall_64+0x3f/0x90 [ 41.346447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.347099] RIP: 0033:0x7f24140f6d82 [ 41.347557] 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 [ 41.349712] RSP: 002b:00007ffecd896b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.350619] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24140f6d82 [ 41.351474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2413530000 [ 41.352322] RBP: 00007f2413530000 R08: 0000000000000009 R09: 0000000000001000 [ 41.353198] R10: 0000000000000812 R11: 0000000000000206 R12: 000055733f529ec0 [ 41.354043] R13: 00007ffecd896b50 R14: 00007ffecd896b80 R15: 00007ffecd896ee0 [ 41.354917] [ 41.355210] [ 41.355428] Allocated by task 217: [ 41.355855] kasan_save_stack+0x22/0x50 [ 41.356359] kasan_set_track+0x25/0x30 [ 41.356856] __kasan_slab_alloc+0x59/0x70 [ 41.357384] kmem_cache_alloc+0x16b/0x370 [ 41.357894] vm_area_dup+0x20/0x160 [ 41.358345] __split_vma+0x170/0x950 [ 41.358813] split_vma+0xc6/0x110 [ 41.359252] mprotect_fixup+0x8d2/0xb30 [ 41.359751] do_mprotect_pkey+0x87e/0xd40 [ 41.360273] __x64_sys_mprotect+0x78/0xc0 [ 41.360793] do_syscall_64+0x3f/0x90 [ 41.361289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.361921] [ 41.362137] Freed by task 217: [ 41.362525] kasan_save_stack+0x22/0x50 [ 41.363027] kasan_set_track+0x25/0x30 [ 41.363522] kasan_save_free_info+0x2b/0x50 [ 41.364054] __kasan_slab_free+0x10a/0x190 [ 41.364587] kmem_cache_free+0x10d/0x4d0 [ 41.365101] rcu_core+0x8c8/0x2860 [ 41.365541] __do_softirq+0x1b7/0x7d4 [ 41.366012] [ 41.366229] Last potentially related work creation: [ 41.366816] kasan_save_stack+0x22/0x50 [ 41.367322] __kasan_record_aux_stack+0x8e/0xa0 [ 41.367954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.368599] remove_vma+0x139/0x170 [ 41.369066] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.369638] do_vmi_munmap+0x1f1/0x2b0 [ 41.370123] __vm_munmap+0x138/0x3a0 [ 41.370588] __x64_sys_munmap+0x59/0x80 [ 41.371089] do_syscall_64+0x3f/0x90 [ 41.371568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.372211] [ 41.372428] The buggy address belongs to the object at ffff88800a6d7e80 [ 41.372428] which belongs to the cache vm_area_struct of size 168 [ 41.373910] The buggy address is located 88 bytes inside of [ 41.373910] freed 168-byte region [ffff88800a6d7e80, ffff88800a6d7f28) [ 41.375331] [ 41.375549] The buggy address belongs to the physical page: [ 41.376223] page:000000002ad62880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa6d7 [ 41.377358] memcg:ffff88800f3c5501 [ 41.377799] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.378464] page_type: 0xffffffff() [ 41.378926] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.379885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3c5501 [ 41.380828] page dumped because: kasan: bad access detected [ 41.381524] [ 41.381743] Memory state around the buggy address: [ 41.382340] ffff88800a6d7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.383232] ffff88800a6d7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.384120] >ffff88800a6d7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.385016] ^ [ 41.385764] ffff88800a6d7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.386655] ffff88800a6d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.387534] ================================================================== [ 41.388638] Disabling lock debugging due to kernel taint [ 43.287294] BUG: Bad rss-counter state mm:000000000ccc41a9 type:MM_FILEPAGES val:33 [ 43.288628] BUG: Bad rss-counter state mm:000000000ccc41a9 type:MM_ANONPAGES val:22 [ 43.790105] BUG: Bad rss-counter state mm:00000000fd4a6efd type:MM_FILEPAGES val:33 [ 43.791137] BUG: Bad rss-counter state mm:00000000fd4a6efd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13691' (ECDSA) to the list of known hosts. 2023/06/19 17:00:36 fuzzer started 2023/06/19 17:00:36 dialing manager at localhost:44161 2023/06/19 17:00:36 checking machine... 2023/06/19 17:00:36 checking revisions... [ 44.498086] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:00:36 testing simple program... [ 44.552658] cgroup: Unknown subsys name 'net' [ 44.618306] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:00:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=ffff88806ce09aa0 RSI=ffff88806ce09b38 RDI=ffff88806ce09aa0 RBP=ffff88806ce09b38 RSP=ffff88806ce099a0 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff8113043d 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 00007fa90d991900 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=00007fa90df490b0 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028e5e66 RSI=ffff88801472ff48 RDI=ffff88801472f338 RBP=0000000000000000 RSP=ffff88801472f278 R8 =0000000000000001 R9 =ffff88801472f328 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88801472f348 R13=ffff88801472f330 R14=ffff88801472ff48 R15=ffff88801472f2e8 RIP=ffffffff81131c60 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 00007f127c3fe900 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=00007f127b91e010 CR3=000000000d9d0000 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=b464e28167f56c8e404c33e9e1613c51 XMM02=000000000011d668eff9b2d0a8fce9cb XMM03=000000000011d7382c67c8bc2e329bc3 XMM04=1f37715055d4e3f500000000000ae988 XMM05=de1c0df6d3c7f8400000000000134d20 XMM06=ae9b264101391a5b00000000001337a0 XMM07=fb795ef6d65770560000000000124078 XMM08=2c67c8bc2e329bc3000000000011d6d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000