syzkaller login: [ 31.121581] BUG: Bad rss-counter state mm:0000000078ed30e8 type:MM_FILEPAGES val:33 [ 31.122619] BUG: Bad rss-counter state mm:0000000078ed30e8 type:MM_ANONPAGES val:22 [ 31.292338] ================================================================== [ 31.293243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.294177] Read of size 8 at addr ffff88800942d880 by task sshd/221 [ 31.294955] [ 31.295172] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.296184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.297144] Call Trace: [ 31.297468] [ 31.297847] dump_stack_lvl+0x91/0xf0 [ 31.298435] print_report+0xcc/0x620 [ 31.299023] ? __virt_addr_valid+0x102/0x340 [ 31.299676] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301123] kasan_report+0xbe/0xf0 [ 31.301681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.302423] vma_interval_tree_remove+0xc75/0xec0 [ 31.303156] vma_prepare+0xc54/0x11a0 [ 31.303632] __split_vma+0x5af/0x950 [ 31.304096] ? __pfx___split_vma+0x10/0x10 [ 31.304620] ? find_held_lock+0x2c/0x110 [ 31.305132] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.305696] ? lock_is_held_type+0x9f/0x120 [ 31.306225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.306826] ? mtree_range_walk+0x632/0x900 [ 31.307372] ? mas_walk+0x5c7/0x7c0 [ 31.307838] do_vmi_munmap+0x1f1/0x2b0 [ 31.308319] mmap_region+0x1f9/0x2660 [ 31.308790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.309301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.310004] ? __pfx_lock_acquire+0x10/0x10 [ 31.310530] ? __pfx_mmap_region+0x10/0x10 [ 31.311069] ? security_mmap_addr+0x7d/0xa0 [ 31.311592] ? get_unmapped_area+0x1f5/0x3f0 [ 31.312136] do_mmap+0x854/0xf00 [ 31.312569] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.313057] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.313610] ksys_mmap_pgoff+0x3af/0x500 [ 31.314114] do_syscall_64+0x3f/0x90 [ 31.314590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315243] RIP: 0033:0x7f55376d0d82 [ 31.315693] 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 [ 31.317791] RSP: 002b:00007ffcfc431398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.318675] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55376d0d82 [ 31.319510] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5536b0a000 [ 31.320350] RBP: 00007f5536b0a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.321175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdb360dec0 [ 31.322014] R13: 00007ffcfc4313b0 R14: 00007ffcfc4313e0 R15: 00007ffcfc431740 [ 31.322883] [ 31.323170] [ 31.323381] Allocated by task 214: [ 31.323800] kasan_save_stack+0x22/0x50 [ 31.324298] kasan_set_track+0x25/0x30 [ 31.324781] __kasan_slab_alloc+0x59/0x70 [ 31.325291] kmem_cache_alloc+0x16b/0x370 [ 31.325799] vm_area_dup+0x20/0x160 [ 31.326241] __split_vma+0x170/0x950 [ 31.326696] split_vma+0xc6/0x110 [ 31.327135] mprotect_fixup+0x8d2/0xb30 [ 31.327623] do_mprotect_pkey+0x87e/0xd40 [ 31.328138] __x64_sys_mprotect+0x78/0xc0 [ 31.328649] do_syscall_64+0x3f/0x90 [ 31.329118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329752] [ 31.329962] Freed by task 214: [ 31.330344] kasan_save_stack+0x22/0x50 [ 31.330859] kasan_set_track+0x25/0x30 [ 31.331349] kasan_save_free_info+0x2b/0x50 [ 31.331871] __kasan_slab_free+0x10a/0x190 [ 31.332389] kmem_cache_free+0x10d/0x4d0 [ 31.332885] rcu_core+0x8c8/0x2860 [ 31.333321] __do_softirq+0x1b7/0x7d4 [ 31.333786] [ 31.333996] Last potentially related work creation: [ 31.334567] kasan_save_stack+0x22/0x50 [ 31.335069] __kasan_record_aux_stack+0x8e/0xa0 [ 31.335631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.336260] remove_vma+0x139/0x170 [ 31.336700] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.337334] do_vmi_munmap+0x1f1/0x2b0 [ 31.337813] __vm_munmap+0x138/0x3a0 [ 31.338273] __x64_sys_munmap+0x59/0x80 [ 31.338765] do_syscall_64+0x3f/0x90 [ 31.339260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.339897] [ 31.340109] The buggy address belongs to the object at ffff88800942d828 [ 31.340109] which belongs to the cache vm_area_struct of size 168 [ 31.341556] The buggy address is located 88 bytes inside of [ 31.341556] freed 168-byte region [ffff88800942d828, ffff88800942d8d0) [ 31.342948] [ 31.343162] The buggy address belongs to the physical page: [ 31.343843] page:00000000f5a441fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x942d [ 31.344914] memcg:ffff8880097e4b01 [ 31.345337] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.345982] page_type: 0xffffffff() [ 31.346433] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.347350] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097e4b01 [ 31.348256] page dumped because: kasan: bad access detected [ 31.348908] [ 31.349125] Memory state around the buggy address: [ 31.349707] ffff88800942d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.350562] ffff88800942d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.351430] >ffff88800942d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.352272] ^ [ 31.352675] ffff88800942d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.353523] ffff88800942d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.354361] ================================================================== [ 31.355438] Disabling lock debugging due to kernel taint [ 33.346586] BUG: Bad rss-counter state mm:00000000ae6c2a41 type:MM_FILEPAGES val:33 [ 33.347903] BUG: Bad rss-counter state mm:00000000ae6c2a41 type:MM_ANONPAGES val:22 [ 33.792482] BUG: Bad rss-counter state mm:00000000f926fcb3 type:MM_FILEPAGES val:33 [ 33.793688] BUG: Bad rss-counter state mm:00000000f926fcb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40747' (ECDSA) to the list of known hosts. 2023/06/20 17:34:05 fuzzer started 2023/06/20 17:34:05 dialing manager at localhost:36067 2023/06/20 17:34:05 checking machine... 2023/06/20 17:34:05 checking revisions... [ 34.506967] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:34:05 testing simple program... [ 34.553921] cgroup: Unknown subsys name 'net' [ 34.608648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:34:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880146eb680 RSI=0000000000000008 RDI=ffffea000060cdc0 RBP=0000000000000001 RSP=ffff888014767970 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000001000 R11=00000000000b6d53 R12=ffffea000060cdc0 R13=0000000000000000 R14=0000000000001000 R15=0000000000082000 RIP=ffffffff8180fea4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f76e9d8c900 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=00007f76e91f8e10 CR3=000000000c8ae000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=959a35ffde55d38300000000000ae988 XMM05=c9f3c9c83f9ac1050000000000132ad0 XMM06=c291bd5c70af25b900000000001318c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1354 RSI=ffff88800d5af858 RDI=ffff88806cf09aa0 RBP=ffff88800d5af858 RSP=ffff88806cf099f0 R8 =ffffffff864bce30 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=00000000000000a8 R13=ffff88806cf09ae0 R14=ffff88800d5af858 R15=ffff88806cf09a98 RIP=ffffffff81130445 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 00007f0bc7b12900 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=00007ffc9844f000 CR3=000000000f598000 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=563412feff00545000000000000080fe 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