syzkaller login: [ 30.552145] BUG: Bad rss-counter state mm:00000000cb0d6744 type:MM_FILEPAGES val:33 [ 30.554043] BUG: Bad rss-counter state mm:00000000cb0d6744 type:MM_ANONPAGES val:22 [ 30.699113] ================================================================== [ 30.700159] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.701278] Read of size 8 at addr ffff88800d69b058 by task sshd/221 [ 30.702238] [ 30.702446] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.703259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.704194] Call Trace: [ 30.704494] [ 30.704803] dump_stack_lvl+0x91/0xf0 [ 30.705270] print_report+0xcc/0x620 [ 30.705727] ? __virt_addr_valid+0x102/0x340 [ 30.706247] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706831] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707443] kasan_report+0xbe/0xf0 [ 30.707907] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708516] vma_interval_tree_remove+0xc75/0xec0 [ 30.709119] vma_prepare+0xc54/0x11a0 [ 30.709584] __split_vma+0x5af/0x950 [ 30.710046] ? __pfx___split_vma+0x10/0x10 [ 30.710563] ? find_held_lock+0x2c/0x110 [ 30.711087] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.711641] ? lock_is_held_type+0x9f/0x120 [ 30.712169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.712805] ? mtree_range_walk+0x632/0x900 [ 30.713357] ? mas_walk+0x5c7/0x7c0 [ 30.713829] do_vmi_munmap+0x1f1/0x2b0 [ 30.714319] mmap_region+0x1f9/0x2660 [ 30.714796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.715290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.716003] ? __pfx_lock_acquire+0x10/0x10 [ 30.716529] ? __pfx_mmap_region+0x10/0x10 [ 30.717093] ? security_mmap_addr+0x7d/0xa0 [ 30.717617] ? get_unmapped_area+0x1f5/0x3f0 [ 30.718164] do_mmap+0x854/0xf00 [ 30.718593] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.719078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.719628] ksys_mmap_pgoff+0x3af/0x500 [ 30.720141] do_syscall_64+0x3f/0x90 [ 30.720630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.721274] RIP: 0033:0x7f8311eadd82 [ 30.721729] 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 [ 30.723839] RSP: 002b:00007ffd7d3ec348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.724760] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8311eadd82 [ 30.725559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83112e7000 [ 30.726347] RBP: 00007f83112e7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.727142] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616bcc7aec0 [ 30.727934] R13: 00007ffd7d3ec360 R14: 00007ffd7d3ec390 R15: 00007ffd7d3ec6f0 [ 30.728794] [ 30.729078] [ 30.729289] Allocated by task 214: [ 30.729712] kasan_save_stack+0x22/0x50 [ 30.730216] kasan_set_track+0x25/0x30 [ 30.730717] __kasan_slab_alloc+0x59/0x70 [ 30.731260] kmem_cache_alloc+0x16b/0x370 [ 30.731776] vm_area_dup+0x20/0x160 [ 30.732232] __split_vma+0x170/0x950 [ 30.732735] split_vma+0xc6/0x110 [ 30.733185] mprotect_fixup+0x8d2/0xb30 [ 30.733686] do_mprotect_pkey+0x87e/0xd40 [ 30.734210] __x64_sys_mprotect+0x78/0xc0 [ 30.734745] do_syscall_64+0x3f/0x90 [ 30.735241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735917] [ 30.736144] Freed by task 214: [ 30.736545] kasan_save_stack+0x22/0x50 [ 30.737099] kasan_set_track+0x25/0x30 [ 30.737598] kasan_save_free_info+0x2b/0x50 [ 30.738127] __kasan_slab_free+0x10a/0x190 [ 30.738654] kmem_cache_free+0x10d/0x4d0 [ 30.739161] rcu_core+0x8c8/0x2860 [ 30.739603] __do_softirq+0x1b7/0x7d4 [ 30.740077] [ 30.740291] Last potentially related work creation: [ 30.740878] kasan_save_stack+0x22/0x50 [ 30.741380] __kasan_record_aux_stack+0x8e/0xa0 [ 30.741946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.742587] remove_vma+0x139/0x170 [ 30.743041] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.743682] do_vmi_munmap+0x1f1/0x2b0 [ 30.744169] __vm_munmap+0x138/0x3a0 [ 30.744642] __x64_sys_munmap+0x59/0x80 [ 30.745139] do_syscall_64+0x3f/0x90 [ 30.745608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746249] [ 30.746466] The buggy address belongs to the object at ffff88800d69b000 [ 30.746466] which belongs to the cache vm_area_struct of size 168 [ 30.747924] The buggy address is located 88 bytes inside of [ 30.747924] freed 168-byte region [ffff88800d69b000, ffff88800d69b0a8) [ 30.749354] [ 30.749573] The buggy address belongs to the physical page: [ 30.750231] page:000000005eb51ecd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd69b [ 30.751306] memcg:ffff88800ddda501 [ 30.751729] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.752371] page_type: 0xffffffff() [ 30.752839] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.753761] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddda501 [ 30.754664] page dumped because: kasan: bad access detected [ 30.755324] [ 30.755542] Memory state around the buggy address: [ 30.756120] ffff88800d69af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.756987] ffff88800d69af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.757863] >ffff88800d69b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.758737] ^ [ 30.759482] ffff88800d69b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.760355] ffff88800d69b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.761227] ================================================================== [ 30.762152] Disabling lock debugging due to kernel taint [ 33.132836] BUG: Bad rss-counter state mm:00000000b682ba0b type:MM_FILEPAGES val:33 [ 33.134254] BUG: Bad rss-counter state mm:00000000b682ba0b type:MM_ANONPAGES val:22 [ 33.607110] BUG: Bad rss-counter state mm:00000000c5ba975c type:MM_FILEPAGES val:33 [ 33.608176] BUG: Bad rss-counter state mm:00000000c5ba975c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10655' (ECDSA) to the list of known hosts. 2023/06/21 02:25:08 fuzzer started 2023/06/21 02:25:08 dialing manager at localhost:36067 2023/06/21 02:25:08 checking machine... 2023/06/21 02:25:08 checking revisions... [ 34.326457] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:25:09 testing simple program... [ 34.378797] cgroup: Unknown subsys name 'net' [ 34.422995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:25:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888006a57c20 RSI=ffff888006a57be8 RDI=ffff888006a576a8 RBP=ffff888006a57730 RSP=ffff888006a57698 R8 =0000000000000001 R9 =ffff888006a576d8 R10=0000000000038001 R11=000000000002384c R12=ffff888006a57760 R13=0000000000000000 R14=ffff88800d9a1b40 R15=0000000000000dc0 RIP=ffffffff810bd057 RFL=00000296 [--S-AP-] 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 00007fc5b6f0e900 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=00007fc5b634f640 CR3=000000000db48000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e0e0916962d8e46c00000000000ae988 XMM05=176b2750296541fa0000000000132a80 XMM06=dda3134389f21bc20000000000131820 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f432fd02366 RCX=ffffffff813a0add RDX=ffffffffffffffff RSI=00007f432fd02366 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806cf09a20 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f432fd02000 R11=00000000000b6a61 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888018e13680 R15=ffff888009a160b8 RIP=ffffffff814c0383 RFL=00000282 [--S----] 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 00007f432f80f900 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=00007ffd05898000 CR3=000000000c538000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000