syzkaller login: [ 30.770901] BUG: Bad rss-counter state mm:00000000b9b758e2 type:MM_FILEPAGES val:33 [ 30.771827] BUG: Bad rss-counter state mm:00000000b9b758e2 type:MM_ANONPAGES val:22 [ 30.872348] ================================================================== [ 30.873061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.873738] Read of size 8 at addr ffff88800ed695c8 by task sshd/219 [ 30.874288] [ 30.874496] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.875101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.875789] Call Trace: [ 30.876011] [ 30.876205] dump_stack_lvl+0x91/0xf0 [ 30.876553] print_report+0xcc/0x620 [ 30.877050] ? __virt_addr_valid+0x102/0x340 [ 30.877442] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877857] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.878280] kasan_report+0xbe/0xf0 [ 30.878630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.879054] vma_interval_tree_remove+0xc75/0xec0 [ 30.879484] vma_prepare+0xc54/0x11a0 [ 30.879812] __split_vma+0x5af/0x950 [ 30.880139] ? __pfx___split_vma+0x10/0x10 [ 30.880502] ? find_held_lock+0x2c/0x110 [ 30.880864] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.881247] ? lock_is_held_type+0x9f/0x120 [ 30.881629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.882039] ? mtree_range_walk+0x632/0x900 [ 30.882465] ? mas_walk+0x5c7/0x7c0 [ 30.882789] do_vmi_munmap+0x1f1/0x2b0 [ 30.883137] mmap_region+0x1f9/0x2660 [ 30.883513] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.883863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.884368] ? __pfx_lock_acquire+0x10/0x10 [ 30.884740] ? __pfx_mmap_region+0x10/0x10 [ 30.885098] ? security_mmap_addr+0x7d/0xa0 [ 30.885461] ? get_unmapped_area+0x1f5/0x3f0 [ 30.885838] do_mmap+0x854/0xf00 [ 30.886174] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.886578] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.886965] ksys_mmap_pgoff+0x3af/0x500 [ 30.887344] do_syscall_64+0x3f/0x90 [ 30.887689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888127] RIP: 0033:0x7f069deded82 [ 30.888461] 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 [ 30.890005] RSP: 002b:00007fff06c890f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.890705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f069deded82 [ 30.891293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f069d318000 [ 30.891906] RBP: 00007f069d318000 R08: 0000000000000009 R09: 0000000000001000 [ 30.892509] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a387daf70 [ 30.893096] R13: 00007fff06c89110 R14: 00007fff06c89140 R15: 00007fff06c894a0 [ 30.893725] [ 30.893924] [ 30.894072] Allocated by task 212: [ 30.894385] kasan_save_stack+0x22/0x50 [ 30.894736] kasan_set_track+0x25/0x30 [ 30.895083] __kasan_slab_alloc+0x59/0x70 [ 30.895453] kmem_cache_alloc+0x16b/0x370 [ 30.895815] vm_area_dup+0x20/0x160 [ 30.896134] __split_vma+0x170/0x950 [ 30.896475] split_vma+0xc6/0x110 [ 30.896782] mprotect_fixup+0x8d2/0xb30 [ 30.897139] do_mprotect_pkey+0x87e/0xd40 [ 30.897513] __x64_sys_mprotect+0x78/0xc0 [ 30.897874] do_syscall_64+0x3f/0x90 [ 30.898201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898704] [ 30.898860] Freed by task 13: [ 30.899123] kasan_save_stack+0x22/0x50 [ 30.899500] kasan_set_track+0x25/0x30 [ 30.899847] kasan_save_free_info+0x2b/0x50 [ 30.900212] __kasan_slab_free+0x10a/0x190 [ 30.900621] kmem_cache_free+0x10d/0x4d0 [ 30.900989] rcu_core+0x8c8/0x2860 [ 30.901300] __do_softirq+0x1b7/0x7d4 [ 30.901638] [ 30.901786] Last potentially related work creation: [ 30.902213] kasan_save_stack+0x22/0x50 [ 30.902589] __kasan_record_aux_stack+0x8e/0xa0 [ 30.902986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.903465] remove_vma+0x139/0x170 [ 30.903761] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.904147] do_vmi_munmap+0x1f1/0x2b0 [ 30.904474] __vm_munmap+0x138/0x3a0 [ 30.904782] __x64_sys_munmap+0x59/0x80 [ 30.905114] do_syscall_64+0x3f/0x90 [ 30.905446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905888] [ 30.906032] The buggy address belongs to the object at ffff88800ed69570 [ 30.906032] which belongs to the cache vm_area_struct of size 168 [ 30.907016] The buggy address is located 88 bytes inside of [ 30.907016] freed 168-byte region [ffff88800ed69570, ffff88800ed69618) [ 30.907917] [ 30.908068] The buggy address belongs to the physical page: [ 30.908531] page:000000009134e0cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed69 [ 30.909238] memcg:ffff88800debb101 [ 30.909534] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.909986] page_type: 0xffffffff() [ 30.910297] raw: 0100000000000200 ffff8880087a0c80 ffffea00003514c0 dead000000000004 [ 30.910950] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800debb101 [ 30.911578] page dumped because: kasan: bad access detected [ 30.912029] [ 30.912177] Memory state around the buggy address: [ 30.912582] ffff88800ed69480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.913163] ffff88800ed69500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.913744] >ffff88800ed69580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.914358] ^ [ 30.914815] ffff88800ed69600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.915374] ffff88800ed69680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.915951] ================================================================== [ 30.916669] Disabling lock debugging due to kernel taint [ 32.868211] BUG: Bad rss-counter state mm:000000006b39dea5 type:MM_FILEPAGES val:33 [ 32.869235] BUG: Bad rss-counter state mm:000000006b39dea5 type:MM_ANONPAGES val:22 [ 33.249255] BUG: Bad rss-counter state mm:000000005fc1dc44 type:MM_FILEPAGES val:33 [ 33.249833] BUG: Bad rss-counter state mm:000000005fc1dc44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35650' (ECDSA) to the list of known hosts. 2023/06/21 09:29:56 fuzzer started 2023/06/21 09:29:57 dialing manager at localhost:36067 2023/06/21 09:29:57 checking machine... 2023/06/21 09:29:57 checking revisions... [ 33.860658] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:29:57 testing simple program... [ 33.894712] cgroup: Unknown subsys name 'net' [ 33.927858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:29:56 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=00007fff747cc768 CR3=000000000e964000 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=2036353a39323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a39323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fe83720 RCX=0000000000000000 RDX=ffffffff87b89c40 RSI=ffffffff848ff1e0 RDI=ffff88800fe83740 RBP=ffff88800fe83738 RSP=ffff888017e4fc50 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffff88800fe83768 R15=ffff88800fe83720 RIP=ffffffff812db2a2 RFL=00000292 [--S-A--] 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 00007f1d73c68900 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=00007ffd25577000 CR3=000000001a972000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000