syzkaller login: [ 47.619649] BUG: Bad rss-counter state mm:000000002677ac30 type:MM_FILEPAGES val:33 [ 47.620828] BUG: Bad rss-counter state mm:000000002677ac30 type:MM_ANONPAGES val:22 [ 47.659575] ================================================================== [ 47.660552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.661733] Read of size 8 at addr ffff88800c5f8798 by task sshd/218 [ 47.662661] [ 47.662898] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.663858] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.664961] Call Trace: [ 47.665314] [ 47.665627] dump_stack_lvl+0x91/0xf0 [ 47.666171] print_report+0xcc/0x620 [ 47.666704] ? __virt_addr_valid+0x102/0x340 [ 47.667314] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.668002] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.668690] kasan_report+0xbe/0xf0 [ 47.669230] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.669917] vma_interval_tree_remove+0xc75/0xec0 [ 47.670581] vma_prepare+0xc54/0x11a0 [ 47.671107] __split_vma+0x5af/0x950 [ 47.671636] ? __pfx___split_vma+0x10/0x10 [ 47.672228] ? find_held_lock+0x2c/0x110 [ 47.672812] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.673466] ? lock_is_held_type+0x9f/0x120 [ 47.674064] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.674739] ? mtree_range_walk+0x632/0x900 [ 47.675351] ? mas_walk+0x5c7/0x7c0 [ 47.675876] do_vmi_munmap+0x1f1/0x2b0 [ 47.676426] mmap_region+0x1f9/0x2660 [ 47.676966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.677534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.678329] ? __pfx_lock_acquire+0x10/0x10 [ 47.678920] ? __pfx_mmap_region+0x10/0x10 [ 47.679512] ? security_mmap_addr+0x7d/0xa0 [ 47.680100] ? get_unmapped_area+0x1f5/0x3f0 [ 47.680709] do_mmap+0x854/0xf00 [ 47.681208] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.681753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.682375] ksys_mmap_pgoff+0x3af/0x500 [ 47.682942] do_syscall_64+0x3f/0x90 [ 47.683470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.684186] RIP: 0033:0x7fd8feb71d82 [ 47.684691] 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 [ 47.687074] RSP: 002b:00007ffe1539c5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.688081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8feb71d82 [ 47.689030] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8fdfab000 [ 47.689973] RBP: 00007fd8fdfab000 R08: 0000000000000009 R09: 0000000000001000 [ 47.690916] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d72b656ec0 [ 47.691862] R13: 00007ffe1539c610 R14: 00007ffe1539c640 R15: 00007ffe1539c9a0 [ 47.692819] [ 47.693158] [ 47.693394] Allocated by task 211: [ 47.693872] kasan_save_stack+0x22/0x50 [ 47.694433] kasan_set_track+0x25/0x30 [ 47.694980] __kasan_slab_alloc+0x59/0x70 [ 47.695561] kmem_cache_alloc+0x16b/0x370 [ 47.696134] vm_area_dup+0x20/0x160 [ 47.696638] __split_vma+0x170/0x950 [ 47.697175] split_vma+0xc6/0x110 [ 47.697669] mprotect_fixup+0x8d2/0xb30 [ 47.698227] do_mprotect_pkey+0x87e/0xd40 [ 47.698803] __x64_sys_mprotect+0x78/0xc0 [ 47.699381] do_syscall_64+0x3f/0x90 [ 47.699903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.700619] [ 47.700870] Freed by task 211: [ 47.701318] kasan_save_stack+0x22/0x50 [ 47.701877] kasan_set_track+0x25/0x30 [ 47.702431] kasan_save_free_info+0x2b/0x50 [ 47.703028] __kasan_slab_free+0x10a/0x190 [ 47.703619] kmem_cache_free+0x10d/0x4d0 [ 47.704186] rcu_core+0x8c8/0x2860 [ 47.704684] __do_softirq+0x1b7/0x7d4 [ 47.705233] [ 47.705476] Last potentially related work creation: [ 47.706134] kasan_save_stack+0x22/0x50 [ 47.706700] __kasan_record_aux_stack+0x8e/0xa0 [ 47.707346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.708057] remove_vma+0x139/0x170 [ 47.708561] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.709192] do_vmi_munmap+0x1f1/0x2b0 [ 47.709741] __vm_munmap+0x138/0x3a0 [ 47.710264] __x64_sys_munmap+0x59/0x80 [ 47.710820] do_syscall_64+0x3f/0x90 [ 47.711347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.712064] [ 47.712302] The buggy address belongs to the object at ffff88800c5f8740 [ 47.712302] which belongs to the cache vm_area_struct of size 168 [ 47.713985] The buggy address is located 88 bytes inside of [ 47.713985] freed 168-byte region [ffff88800c5f8740, ffff88800c5f87e8) [ 47.715573] [ 47.715817] The buggy address belongs to the physical page: [ 47.716559] page:000000009b3b7479 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5f8 [ 47.717787] memcg:ffff88800f2ff201 [ 47.718261] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.719042] page_type: 0xffffffff() [ 47.719552] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 47.720580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2ff201 [ 47.721599] page dumped because: kasan: bad access detected [ 47.722340] [ 47.722577] Memory state around the buggy address: [ 47.723229] ffff88800c5f8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.724185] ffff88800c5f8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 47.725144] >ffff88800c5f8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 47.726095] ^ [ 47.726646] ffff88800c5f8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 47.727604] ffff88800c5f8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 47.728554] ================================================================== [ 47.729903] Disabling lock debugging due to kernel taint [ 49.731299] BUG: Bad rss-counter state mm:00000000b26bb2f2 type:MM_FILEPAGES val:33 [ 49.732577] BUG: Bad rss-counter state mm:00000000b26bb2f2 type:MM_ANONPAGES val:22 [ 50.190521] BUG: Bad rss-counter state mm:0000000013197933 type:MM_FILEPAGES val:33 [ 50.191505] BUG: Bad rss-counter state mm:0000000013197933 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30911' (ECDSA) to the list of known hosts. 2023/06/19 19:27:45 fuzzer started 2023/06/19 19:27:45 dialing manager at localhost:44161 2023/06/19 19:27:45 checking machine... 2023/06/19 19:27:45 checking revisions... [ 50.946480] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:27:45 testing simple program... [ 50.992612] cgroup: Unknown subsys name 'net' [ 51.035954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:27:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85ba4900 RCX=0000000000000000 RDX=1ffffffff0b74949 RSI=ffffffff83646957 RDI=ffffffff85ba4a48 RBP=0000000000000010 RSP=ffff88801c9b7d18 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000cc0 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff83646980 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 00007fcd0d554900 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=00007fcd0db0c0b0 CR3=00000000169b4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=0000000000000001 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=00007ffc4b93d4c8 CR3=000000000c6d4000 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=37323a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000