syzkaller login: [ 92.460900] BUG: Bad rss-counter state mm:000000006d25d544 type:MM_FILEPAGES val:33 [ 92.461963] BUG: Bad rss-counter state mm:000000006d25d544 type:MM_ANONPAGES val:22 [ 92.673996] ================================================================== [ 92.675171] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 92.676549] Read of size 8 at addr ffff88800c9505c8 by task sshd/219 [ 92.677390] [ 92.677637] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 92.678811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 92.679908] Call Trace: [ 92.680258] [ 92.680589] dump_stack_lvl+0x91/0xf0 [ 92.681137] print_report+0xcc/0x620 [ 92.681693] ? __virt_addr_valid+0x102/0x340 [ 92.682322] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.683009] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.683714] kasan_report+0xbe/0xf0 [ 92.684241] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.684957] vma_interval_tree_remove+0xc75/0xec0 [ 92.685626] vma_prepare+0xc54/0x11a0 [ 92.686165] __split_vma+0x5af/0x950 [ 92.686739] ? __pfx___split_vma+0x10/0x10 [ 92.687322] ? find_held_lock+0x2c/0x110 [ 92.687904] do_vmi_align_munmap+0x2ba/0x11f0 [ 92.688538] ? lock_is_held_type+0x9f/0x120 [ 92.689133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 92.689800] ? mtree_range_walk+0x632/0x900 [ 92.690414] ? mas_walk+0x5c7/0x7c0 [ 92.690939] do_vmi_munmap+0x1f1/0x2b0 [ 92.691493] mmap_region+0x1f9/0x2660 [ 92.692066] ? vm_mmap_pgoff+0x15c/0x3a0 [ 92.692657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 92.693483] ? __pfx_lock_acquire+0x10/0x10 [ 92.694094] ? __pfx_mmap_region+0x10/0x10 [ 92.694704] ? security_mmap_addr+0x7d/0xa0 [ 92.695317] ? get_unmapped_area+0x1f5/0x3f0 [ 92.695945] do_mmap+0x854/0xf00 [ 92.696472] vm_mmap_pgoff+0x1a6/0x3a0 [ 92.697043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 92.697686] ksys_mmap_pgoff+0x3af/0x500 [ 92.698271] do_syscall_64+0x3f/0x90 [ 92.698841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.699605] RIP: 0033:0x7fe07b132d82 [ 92.700135] 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 [ 92.702589] RSP: 002b:00007ffe56371d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 92.703629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe07b132d82 [ 92.704674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe07a56c000 [ 92.705650] RBP: 00007fe07a56c000 R08: 0000000000000009 R09: 0000000000001000 [ 92.706625] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e8288dec0 [ 92.707607] R13: 00007ffe56371da0 R14: 00007ffe56371dd0 R15: 00007ffe56372130 [ 92.708600] [ 92.708942] [ 92.709190] Allocated by task 212: [ 92.709719] kasan_save_stack+0x22/0x50 [ 92.710319] kasan_set_track+0x25/0x30 [ 92.710897] __kasan_slab_alloc+0x59/0x70 [ 92.711502] kmem_cache_alloc+0x16b/0x370 [ 92.712094] vm_area_dup+0x20/0x160 [ 92.712633] __split_vma+0x170/0x950 [ 92.713173] split_vma+0xc6/0x110 [ 92.713678] mprotect_fixup+0x8d2/0xb30 [ 92.714264] do_mprotect_pkey+0x87e/0xd40 [ 92.714865] __x64_sys_mprotect+0x78/0xc0 [ 92.715460] do_syscall_64+0x3f/0x90 [ 92.716014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.716820] [ 92.717065] Freed by task 212: [ 92.717519] kasan_save_stack+0x22/0x50 [ 92.718104] kasan_set_track+0x25/0x30 [ 92.718669] kasan_save_free_info+0x2b/0x50 [ 92.719276] __kasan_slab_free+0x10a/0x190 [ 92.719886] kmem_cache_free+0x10d/0x4d0 [ 92.720490] rcu_core+0x8c8/0x2860 [ 92.720994] __do_softirq+0x1b7/0x7d4 [ 92.721538] [ 92.721799] Last potentially related work creation: [ 92.722519] kasan_save_stack+0x22/0x50 [ 92.723103] __kasan_record_aux_stack+0x8e/0xa0 [ 92.723746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 92.724465] remove_vma+0x139/0x170 [ 92.724966] do_vmi_align_munmap+0xd4a/0x11f0 [ 92.725596] do_vmi_munmap+0x1f1/0x2b0 [ 92.726139] __vm_munmap+0x138/0x3a0 [ 92.726658] __x64_sys_munmap+0x59/0x80 [ 92.727208] do_syscall_64+0x3f/0x90 [ 92.727752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.728501] [ 92.728740] The buggy address belongs to the object at ffff88800c950570 [ 92.728740] which belongs to the cache vm_area_struct of size 168 [ 92.730366] The buggy address is located 88 bytes inside of [ 92.730366] freed 168-byte region [ffff88800c950570, ffff88800c950618) [ 92.731928] [ 92.732169] The buggy address belongs to the physical page: [ 92.732912] page:00000000679862a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc950 [ 92.734130] memcg:ffff888015a05a01 [ 92.734624] flags: 0x100000000000200(slab|node=0|zone=1) [ 92.735343] page_type: 0xffffffff() [ 92.735855] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 92.736907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a05a01 [ 92.737919] page dumped because: kasan: bad access detected [ 92.738684] [ 92.738935] Memory state around the buggy address: [ 92.739631] ffff88800c950480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 92.740639] ffff88800c950500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 92.741624] >ffff88800c950580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.742612] ^ [ 92.743384] ffff88800c950600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 92.744373] ffff88800c950680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.745353] ================================================================== [ 92.746764] Disabling lock debugging due to kernel taint [ 94.279147] BUG: Bad rss-counter state mm:00000000a19ac4b9 type:MM_FILEPAGES val:33 [ 94.279862] BUG: Bad rss-counter state mm:00000000a19ac4b9 type:MM_ANONPAGES val:22 [ 94.872010] BUG: Bad rss-counter state mm:00000000058972ae type:MM_FILEPAGES val:33 [ 94.873167] BUG: Bad rss-counter state mm:00000000058972ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40985' (ECDSA) to the list of known hosts. 2023/06/19 22:02:31 fuzzer started 2023/06/19 22:02:31 dialing manager at localhost:44161 2023/06/19 22:02:31 checking machine... 2023/06/19 22:02:31 checking revisions... [ 95.528795] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:02:31 testing simple program... [ 95.584731] cgroup: Unknown subsys name 'net' [ 95.636435] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:29 Registers: info registers vcpu 0 RAX=ffffffff81132ffe RBX=0000000000000002 RCX=ffff88806ce09af0 RDX=ffff88806ce09a98 RSI=1ffff1100d9c134c RDI=ffff88806ce09a50 RBP=ffff88806ce09aa8 RSP=ffff88806ce09990 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806ce09a50 R11=00000000000b6996 R12=ffffed100d9c134c R13=ffff88806ce09a98 R14=ffff88806ce09a98 R15=ffff88806ce09a50 RIP=ffffffff81130641 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 00007f043793b900 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=00007f0437ef0650 CR3=0000000016c48000 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=1ffff11001be7ad1 RBX=ffff88800df3d658 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800df3d688 RBP=ffff888016e37500 RSP=ffff88801585f888 R8 =0000000000000001 R9 =ffffed1002b0bf05 R10=0000000000000003 R11=0000000000120000 R12=dffffc0000000000 R13=ffff888016e31e00 R14=ffffffff81802eb3 R15=ffff888018f08438 RIP=ffffffff81846362 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0db7cb2900 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=00007f0db71d7008 CR3=00000000098f2000 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=5444157238bed5bb9a4473f0af39e0b9 XMM02=00000000001214c8eff9b2d0a8fce9cb XMM03=00000000001215982c67c8bc2e329bc3 XMM04=4610a784f758d3e400000000000ae988 XMM05=c34cdc65b0e883430000000000139d00 XMM06=806171799158d9670000000000138b00 XMM07=fb795ef6d65770560000000000128ad8 XMM08=2c67c8bc2e329bc30000000000121538 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000