syzkaller login: [ 31.043552] BUG: Bad rss-counter state mm:00000000d7b090c0 type:MM_FILEPAGES val:33 [ 31.044777] BUG: Bad rss-counter state mm:00000000d7b090c0 type:MM_ANONPAGES val:22 [ 31.211859] ================================================================== [ 31.212792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.213728] Read of size 8 at addr ffff88800f043d08 by task sshd/221 [ 31.214612] [ 31.214833] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.215712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.216710] Call Trace: [ 31.217036] [ 31.217329] dump_stack_lvl+0x91/0xf0 [ 31.217817] print_report+0xcc/0x620 [ 31.218297] ? __virt_addr_valid+0x102/0x340 [ 31.218846] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219473] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220089] kasan_report+0xbe/0xf0 [ 31.220583] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221216] vma_interval_tree_remove+0xc75/0xec0 [ 31.221839] vma_prepare+0xc54/0x11a0 [ 31.222326] __split_vma+0x5af/0x950 [ 31.222804] ? __pfx___split_vma+0x10/0x10 [ 31.223353] ? find_held_lock+0x2c/0x110 [ 31.223879] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.224459] ? lock_is_held_type+0x9f/0x120 [ 31.225034] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.225649] ? mtree_range_walk+0x632/0x900 [ 31.226209] ? mas_walk+0x5c7/0x7c0 [ 31.226693] do_vmi_munmap+0x1f1/0x2b0 [ 31.227189] mmap_region+0x1f9/0x2660 [ 31.227670] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.228186] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.228920] ? __pfx_lock_acquire+0x10/0x10 [ 31.229457] ? __pfx_mmap_region+0x10/0x10 [ 31.229990] ? security_mmap_addr+0x7d/0xa0 [ 31.230538] ? get_unmapped_area+0x1f5/0x3f0 [ 31.231104] do_mmap+0x854/0xf00 [ 31.231562] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.232071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.232648] ksys_mmap_pgoff+0x3af/0x500 [ 31.233164] do_syscall_64+0x3f/0x90 [ 31.233640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234305] RIP: 0033:0x7fb6bdd56d82 [ 31.234758] 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 [ 31.236903] RSP: 002b:00007ffc3a68f458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.237808] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6bdd56d82 [ 31.238659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6bd190000 [ 31.239501] RBP: 00007fb6bd190000 R08: 0000000000000009 R09: 0000000000001000 [ 31.240346] R10: 0000000000000812 R11: 0000000000000206 R12: 000056116f592ec0 [ 31.241208] R13: 00007ffc3a68f470 R14: 00007ffc3a68f4a0 R15: 00007ffc3a68f800 [ 31.242075] [ 31.242371] [ 31.242593] Allocated by task 214: [ 31.243019] kasan_save_stack+0x22/0x50 [ 31.243538] kasan_set_track+0x25/0x30 [ 31.244039] __kasan_slab_alloc+0x59/0x70 [ 31.244578] kmem_cache_alloc+0x16b/0x370 [ 31.245110] vm_area_dup+0x20/0x160 [ 31.245579] __split_vma+0x170/0x950 [ 31.246051] split_vma+0xc6/0x110 [ 31.246502] mprotect_fixup+0x8d2/0xb30 [ 31.247013] do_mprotect_pkey+0x87e/0xd40 [ 31.247543] __x64_sys_mprotect+0x78/0xc0 [ 31.248074] do_syscall_64+0x3f/0x90 [ 31.248575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249227] [ 31.249441] Freed by task 214: [ 31.249841] kasan_save_stack+0x22/0x50 [ 31.250348] kasan_set_track+0x25/0x30 [ 31.250853] kasan_save_free_info+0x2b/0x50 [ 31.251396] __kasan_slab_free+0x10a/0x190 [ 31.251936] kmem_cache_free+0x10d/0x4d0 [ 31.252445] rcu_core+0x8c8/0x2860 [ 31.252904] __do_softirq+0x1b7/0x7d4 [ 31.253384] [ 31.253597] Last potentially related work creation: [ 31.254189] kasan_save_stack+0x22/0x50 [ 31.254696] __kasan_record_aux_stack+0x8e/0xa0 [ 31.255292] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.255947] remove_vma+0x139/0x170 [ 31.256486] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.257061] do_vmi_munmap+0x1f1/0x2b0 [ 31.257549] __vm_munmap+0x138/0x3a0 [ 31.258017] __x64_sys_munmap+0x59/0x80 [ 31.258517] do_syscall_64+0x3f/0x90 [ 31.258998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259648] [ 31.259867] Second to last potentially related work creation: [ 31.260579] kasan_save_stack+0x22/0x50 [ 31.261085] __kasan_record_aux_stack+0x8e/0xa0 [ 31.261674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.262351] remove_vma+0x139/0x170 [ 31.262813] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.263373] do_vmi_munmap+0x1f1/0x2b0 [ 31.263872] mmap_region+0x1f9/0x2660 [ 31.264363] do_mmap+0x854/0xf00 [ 31.264805] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.265307] ksys_mmap_pgoff+0x3af/0x500 [ 31.265819] do_syscall_64+0x3f/0x90 [ 31.266303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266955] [ 31.267175] The buggy address belongs to the object at ffff88800f043cb0 [ 31.267175] which belongs to the cache vm_area_struct of size 168 [ 31.268698] The buggy address is located 88 bytes inside of [ 31.268698] freed 168-byte region [ffff88800f043cb0, ffff88800f043d58) [ 31.270138] [ 31.270361] The buggy address belongs to the physical page: [ 31.271032] page:0000000068a47b86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf043 [ 31.272139] memcg:ffff88800d325501 [ 31.272575] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.273296] page_type: 0xffffffff() [ 31.273758] raw: 0100000000000200 ffff8880087a0c80 ffffea00003917c0 dead000000000005 [ 31.274689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d325501 [ 31.275622] page dumped because: kasan: bad access detected [ 31.276307] [ 31.276523] Memory state around the buggy address: [ 31.277113] ffff88800f043c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.277989] ffff88800f043c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.278865] >ffff88800f043d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.279741] ^ [ 31.280185] ffff88800f043d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.281074] ffff88800f043e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.281929] ================================================================== [ 31.282840] Disabling lock debugging due to kernel taint [ 33.801130] BUG: Bad rss-counter state mm:0000000006df23b8 type:MM_FILEPAGES val:33 [ 33.802190] BUG: Bad rss-counter state mm:0000000006df23b8 type:MM_ANONPAGES val:22 [ 34.296851] BUG: Bad rss-counter state mm:000000006d410959 type:MM_FILEPAGES val:33 [ 34.298236] BUG: Bad rss-counter state mm:000000006d410959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29592' (ECDSA) to the list of known hosts. 2023/06/20 19:23:41 fuzzer started 2023/06/20 19:23:41 dialing manager at localhost:36067 2023/06/20 19:23:41 checking machine... 2023/06/20 19:23:41 checking revisions... [ 35.081109] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:23:41 testing simple program... [ 35.135452] cgroup: Unknown subsys name 'net' [ 35.197614] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:23:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880103b9b40 RSI=ffffffff8185a0da RDI=ffffffff81810711 RBP=1ffff110033acfba RSP=ffff888019d67dd0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000008 R13=ffff888009941100 R14=ffff88800de3f680 R15=dffffc0000000000 RIP=ffffffff8185a024 RFL=00000293 [--S-A-C] 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 00007f79fcb51900 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=00007f79fd1090b0 CR3=000000000de80000 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=0000000000000000 RBX=ffff88801930ec00 RCX=0000000000000000 RDX=ffff888008d69b40 RSI=ffffffff844f433d RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888008d7f030 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=1ffff110011afe17 R13=0000000000001100 R14=ffff888008d7f0d8 R15=0000000000000001 RIP=ffffffff814c089b 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 =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=00007ffea2d0e328 CR3=0000000005482000 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=00007fb2c9dd3510000055bf40b2a790 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