syzkaller login: [ 56.821997] BUG: Bad rss-counter state mm:00000000b31ed2e9 type:MM_FILEPAGES val:33 [ 56.823402] BUG: Bad rss-counter state mm:00000000b31ed2e9 type:MM_ANONPAGES val:22 [ 56.963146] ================================================================== [ 56.964015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.964898] Read of size 8 at addr ffff88800f7cd4e0 by task sshd/220 [ 56.965616] [ 56.965821] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.966736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.967670] Call Trace: [ 56.967969] [ 56.968239] dump_stack_lvl+0x91/0xf0 [ 56.968732] print_report+0xcc/0x620 [ 56.969191] ? __virt_addr_valid+0x102/0x340 [ 56.969716] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.970294] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.970876] kasan_report+0xbe/0xf0 [ 56.971335] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.971918] vma_interval_tree_remove+0xc75/0xec0 [ 56.972491] vma_prepare+0xc54/0x11a0 [ 56.972942] __split_vma+0x5af/0x950 [ 56.973397] ? __pfx___split_vma+0x10/0x10 [ 56.973901] ? find_held_lock+0x2c/0x110 [ 56.974392] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.974925] ? lock_is_held_type+0x9f/0x120 [ 56.975457] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.976042] ? mtree_range_walk+0x632/0x900 [ 56.976557] ? mas_walk+0x5c7/0x7c0 [ 56.977013] do_vmi_munmap+0x1f1/0x2b0 [ 56.977480] mmap_region+0x1f9/0x2660 [ 56.977950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.978443] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.979143] ? __pfx_lock_acquire+0x10/0x10 [ 56.979674] ? __pfx_mmap_region+0x10/0x10 [ 56.980177] ? security_mmap_addr+0x7d/0xa0 [ 56.980682] ? get_unmapped_area+0x1f5/0x3f0 [ 56.981199] do_mmap+0x854/0xf00 [ 56.981613] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.982083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.982618] ksys_mmap_pgoff+0x3af/0x500 [ 56.983112] do_syscall_64+0x3f/0x90 [ 56.983579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.984195] RIP: 0033:0x7f6e7710fd82 [ 56.984629] 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 [ 56.986654] RSP: 002b:00007ffdea0cc6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.987519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e7710fd82 [ 56.988320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e76549000 [ 56.989135] RBP: 00007f6e76549000 R08: 0000000000000009 R09: 0000000000001000 [ 56.989959] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d63a79ec0 [ 56.990770] R13: 00007ffdea0cc6d0 R14: 00007ffdea0cc700 R15: 00007ffdea0cca60 [ 56.991603] [ 56.991879] [ 56.992089] Allocated by task 213: [ 56.992492] kasan_save_stack+0x22/0x50 [ 56.992980] kasan_set_track+0x25/0x30 [ 56.993449] __kasan_slab_alloc+0x59/0x70 [ 56.993946] kmem_cache_alloc+0x16b/0x370 [ 56.994434] vm_area_dup+0x20/0x160 [ 56.994867] __split_vma+0x170/0x950 [ 56.995324] split_vma+0xc6/0x110 [ 56.995747] mprotect_fixup+0x8d2/0xb30 [ 56.996225] do_mprotect_pkey+0x87e/0xd40 [ 56.996726] __x64_sys_mprotect+0x78/0xc0 [ 56.997216] do_syscall_64+0x3f/0x90 [ 56.997662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.998272] [ 56.998479] Freed by task 213: [ 56.998856] kasan_save_stack+0x22/0x50 [ 56.999339] kasan_set_track+0x25/0x30 [ 56.999808] kasan_save_free_info+0x2b/0x50 [ 57.000315] __kasan_slab_free+0x10a/0x190 [ 57.000821] kmem_cache_free+0x10d/0x4d0 [ 57.001312] rcu_core+0x8c8/0x2860 [ 57.001737] __do_softirq+0x1b7/0x7d4 [ 57.002192] [ 57.002394] Last potentially related work creation: [ 57.002950] kasan_save_stack+0x22/0x50 [ 57.003444] __kasan_record_aux_stack+0x8e/0xa0 [ 57.003989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.004601] remove_vma+0x139/0x170 [ 57.005044] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.005567] do_vmi_munmap+0x1f1/0x2b0 [ 57.006028] __vm_munmap+0x138/0x3a0 [ 57.006480] __x64_sys_munmap+0x59/0x80 [ 57.006951] do_syscall_64+0x3f/0x90 [ 57.007410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.008012] [ 57.008215] The buggy address belongs to the object at ffff88800f7cd488 [ 57.008215] which belongs to the cache vm_area_struct of size 168 [ 57.009617] The buggy address is located 88 bytes inside of [ 57.009617] freed 168-byte region [ffff88800f7cd488, ffff88800f7cd530) [ 57.010947] [ 57.011153] The buggy address belongs to the physical page: [ 57.011787] page:000000004ca85058 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7cd [ 57.012818] memcg:ffff88800d542001 [ 57.013227] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.013843] page_type: 0xffffffff() [ 57.014272] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.015138] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d542001 [ 57.016019] page dumped because: kasan: bad access detected [ 57.016647] [ 57.016857] Memory state around the buggy address: [ 57.017408] ffff88800f7cd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.018231] ffff88800f7cd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 57.019056] >ffff88800f7cd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.019878] ^ [ 57.020599] ffff88800f7cd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 57.021421] ffff88800f7cd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.022235] ================================================================== [ 57.023156] Disabling lock debugging due to kernel taint [ 59.074933] BUG: Bad rss-counter state mm:000000006bf94ed2 type:MM_FILEPAGES val:33 [ 59.076104] BUG: Bad rss-counter state mm:000000006bf94ed2 type:MM_ANONPAGES val:22 [ 59.495298] BUG: Bad rss-counter state mm:00000000689858d9 type:MM_FILEPAGES val:33 [ 59.496509] BUG: Bad rss-counter state mm:00000000689858d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25585' (ECDSA) to the list of known hosts. 2023/06/19 13:30:46 fuzzer started 2023/06/19 13:30:47 dialing manager at localhost:44161 2023/06/19 13:30:47 checking machine... 2023/06/19 13:30:47 checking revisions... [ 60.205725] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:30:47 testing simple program... [ 60.262719] cgroup: Unknown subsys name 'net' [ 60.324170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:21 Registers: info registers vcpu 0 RAX=ffff88800eab8000 RBX=ffff88800eab7f58 RCX=0000000000000001 RDX=ffff88800eab7f60 RSI=ffff88800eab7f48 RDI=ffff88806ce09aa8 RBP=ffff88800eab0000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800eab7f48 R15=ffff88806ce09a98 RIP=ffffffff81131ccc RFL=00000206 [-----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 00007f810d872700 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=00007f2a09c8f0b0 CR3=000000000e016000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036343a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323639 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ede0720 RCX=ffff88800844f780 RDX=ffffea00003b7800 RSI=ffff88800cd72850 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88801580f9e8 R8 =ffff88800ede0850 R9 =0000000000000000 R10=ffffea0000335c80 R11=00000000800d000b R12=dffffc0000000000 R13=ffff88801580fa28 R14=ffff88800844f780 R15=ffff88800cd72850 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f2f4dd0f900 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=00007f2f4d191270 CR3=000000000e3de000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fb6a5279889892a000000000000ae988 XMM05=6271e713788708d300000000001347b0 XMM06=4fda316b135da52b00000000001335a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000