syzkaller login: [ 31.430472] BUG: Bad rss-counter state mm:000000002b5c9948 type:MM_FILEPAGES val:33 [ 31.431907] BUG: Bad rss-counter state mm:000000002b5c9948 type:MM_ANONPAGES val:22 [ 31.541497] ================================================================== [ 31.542234] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.543021] Read of size 8 at addr ffff88800bedd3f8 by task sshd/220 [ 31.543641] [ 31.543818] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.544528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.545364] Call Trace: [ 31.545617] [ 31.545998] dump_stack_lvl+0x91/0xf0 [ 31.546394] print_report+0xcc/0x620 [ 31.546781] ? __virt_addr_valid+0x102/0x340 [ 31.547219] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.547704] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.548210] kasan_report+0xbe/0xf0 [ 31.548595] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.549088] vma_interval_tree_remove+0xc75/0xec0 [ 31.549561] vma_prepare+0xc54/0x11a0 [ 31.549942] __split_vma+0x5af/0x950 [ 31.550333] ? __pfx___split_vma+0x10/0x10 [ 31.550769] ? find_held_lock+0x2c/0x110 [ 31.551196] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.551667] ? lock_is_held_type+0x9f/0x120 [ 31.552114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.552634] ? mtree_range_walk+0x632/0x900 [ 31.553090] ? mas_walk+0x5c7/0x7c0 [ 31.553476] do_vmi_munmap+0x1f1/0x2b0 [ 31.553879] mmap_region+0x1f9/0x2660 [ 31.554268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.554693] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.555287] ? __pfx_lock_acquire+0x10/0x10 [ 31.555721] ? __pfx_mmap_region+0x10/0x10 [ 31.556156] ? security_mmap_addr+0x7d/0xa0 [ 31.556607] ? get_unmapped_area+0x1f5/0x3f0 [ 31.557060] do_mmap+0x854/0xf00 [ 31.557417] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.557833] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.558294] ksys_mmap_pgoff+0x3af/0x500 [ 31.558713] do_syscall_64+0x3f/0x90 [ 31.559101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559634] RIP: 0033:0x7fea4b34bd82 [ 31.560017] 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 [ 31.561773] RSP: 002b:00007ffe608e5058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.562515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea4b34bd82 [ 31.563222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea4a785000 [ 31.563922] RBP: 00007fea4a785000 R08: 0000000000000009 R09: 0000000000001000 [ 31.564631] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ada6c7ec0 [ 31.565324] R13: 00007ffe608e5070 R14: 00007ffe608e50a0 R15: 00007ffe608e5400 [ 31.566026] [ 31.566270] [ 31.566446] Allocated by task 213: [ 31.566802] kasan_save_stack+0x22/0x50 [ 31.567221] kasan_set_track+0x25/0x30 [ 31.567629] __kasan_slab_alloc+0x59/0x70 [ 31.568057] kmem_cache_alloc+0x16b/0x370 [ 31.568507] vm_area_dup+0x20/0x160 [ 31.568886] __split_vma+0x170/0x950 [ 31.569272] split_vma+0xc6/0x110 [ 31.569636] mprotect_fixup+0x8d2/0xb30 [ 31.570044] do_mprotect_pkey+0x87e/0xd40 [ 31.570466] __x64_sys_mprotect+0x78/0xc0 [ 31.570899] do_syscall_64+0x3f/0x90 [ 31.571294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.571824] [ 31.572003] Freed by task 203: [ 31.572336] kasan_save_stack+0x22/0x50 [ 31.572747] kasan_set_track+0x25/0x30 [ 31.573149] kasan_save_free_info+0x2b/0x50 [ 31.573585] __kasan_slab_free+0x10a/0x190 [ 31.574019] kmem_cache_free+0x10d/0x4d0 [ 31.574432] rcu_core+0x8c8/0x2860 [ 31.574797] __do_softirq+0x1b7/0x7d4 [ 31.575197] [ 31.575376] Last potentially related work creation: [ 31.575858] kasan_save_stack+0x22/0x50 [ 31.576275] __kasan_record_aux_stack+0x8e/0xa0 [ 31.576766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.577294] remove_vma+0x139/0x170 [ 31.577662] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.578118] do_vmi_munmap+0x1f1/0x2b0 [ 31.578511] __vm_munmap+0x138/0x3a0 [ 31.578894] __x64_sys_munmap+0x59/0x80 [ 31.579303] do_syscall_64+0x3f/0x90 [ 31.579690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.580222] [ 31.580407] The buggy address belongs to the object at ffff88800bedd3a0 [ 31.580407] which belongs to the cache vm_area_struct of size 168 [ 31.581623] The buggy address is located 88 bytes inside of [ 31.581623] freed 168-byte region [ffff88800bedd3a0, ffff88800bedd448) [ 31.582777] [ 31.582953] The buggy address belongs to the physical page: [ 31.583496] page:000000008734bb69 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbedd [ 31.584399] memcg:ffff888019d81501 [ 31.584749] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.585278] page_type: 0xffffffff() [ 31.585648] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.586405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d81501 [ 31.587239] page dumped because: kasan: bad access detected [ 31.587783] [ 31.587959] Memory state around the buggy address: [ 31.588445] ffff88800bedd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.589154] ffff88800bedd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.589857] >ffff88800bedd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.590547] ^ [ 31.591233] ffff88800bedd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.591932] ffff88800bedd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.592640] ================================================================== [ 31.593612] Disabling lock debugging due to kernel taint [ 33.736143] BUG: Bad rss-counter state mm:00000000a349821e type:MM_FILEPAGES val:33 [ 33.737301] BUG: Bad rss-counter state mm:00000000a349821e type:MM_ANONPAGES val:22 [ 34.122841] BUG: Bad rss-counter state mm:0000000028a90950 type:MM_FILEPAGES val:33 [ 34.123815] BUG: Bad rss-counter state mm:0000000028a90950 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26007' (ECDSA) to the list of known hosts. 2023/06/21 07:56:10 fuzzer started 2023/06/21 07:56:10 dialing manager at localhost:36067 2023/06/21 07:56:10 checking machine... 2023/06/21 07:56:10 checking revisions... [ 34.845452] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:56:11 testing simple program... [ 34.907800] cgroup: Unknown subsys name 'net' [ 34.942694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:10 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=0000000000000001 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=00007ffff3d6ccc8 CR3=0000000005482000 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=00007f27a48de510000056361a8c6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000450 RBX=000055c5665d04c0 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000004 RDI=0000000000000008 RBP=0000000000000000 RSP=00007ffd1a7ab100 R8 =00007f46c58f8983 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000297 R12=0000000000000008 R13=000055c5665cc350 R14=0000000000000000 R15=000055c5665d04c0 RIP=00007f46c58f495e RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f46c4dc9900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd1a7a5000 CR3=000000000da90000 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