syzkaller login: [ 31.111532] BUG: Bad rss-counter state mm:00000000b0814091 type:MM_FILEPAGES val:33 [ 31.112572] BUG: Bad rss-counter state mm:00000000b0814091 type:MM_ANONPAGES val:22 [ 31.272424] ================================================================== [ 31.273338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.274285] Read of size 8 at addr ffff88800d828880 by task sshd/221 [ 31.275058] [ 31.275284] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.276278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.277253] Call Trace: [ 31.277583] [ 31.277873] dump_stack_lvl+0x91/0xf0 [ 31.278388] print_report+0xcc/0x620 [ 31.278876] ? __virt_addr_valid+0x102/0x340 [ 31.279469] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280081] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280705] kasan_report+0xbe/0xf0 [ 31.281186] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281818] vma_interval_tree_remove+0xc75/0xec0 [ 31.282412] vma_prepare+0xc54/0x11a0 [ 31.282890] __split_vma+0x5af/0x950 [ 31.283369] ? __pfx___split_vma+0x10/0x10 [ 31.283897] ? find_held_lock+0x2c/0x110 [ 31.284430] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.285001] ? lock_is_held_type+0x9f/0x120 [ 31.285534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.286138] ? mtree_range_walk+0x632/0x900 [ 31.286682] ? mas_walk+0x5c7/0x7c0 [ 31.287161] do_vmi_munmap+0x1f1/0x2b0 [ 31.287651] mmap_region+0x1f9/0x2660 [ 31.288130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.288638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.289348] ? __pfx_lock_acquire+0x10/0x10 [ 31.289875] ? __pfx_mmap_region+0x10/0x10 [ 31.290403] ? security_mmap_addr+0x7d/0xa0 [ 31.290926] ? get_unmapped_area+0x1f5/0x3f0 [ 31.291495] do_mmap+0x854/0xf00 [ 31.291930] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.292979] ksys_mmap_pgoff+0x3af/0x500 [ 31.293481] do_syscall_64+0x3f/0x90 [ 31.293954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294593] RIP: 0033:0x7fe6a099fd82 [ 31.295047] 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 [ 31.297169] RSP: 002b:00007ffeb6740988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.298133] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6a099fd82 [ 31.299009] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe69fdd9000 [ 31.299912] RBP: 00007fe69fdd9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300779] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a15799ec0 [ 31.301628] R13: 00007ffeb67409a0 R14: 00007ffeb67409d0 R15: 00007ffeb6740d30 [ 31.302485] [ 31.302784] [ 31.302997] Allocated by task 214: [ 31.303438] kasan_save_stack+0x22/0x50 [ 31.303952] kasan_set_track+0x25/0x30 [ 31.304455] __kasan_slab_alloc+0x59/0x70 [ 31.304980] kmem_cache_alloc+0x16b/0x370 [ 31.305518] vm_area_dup+0x20/0x160 [ 31.305977] __split_vma+0x170/0x950 [ 31.306440] split_vma+0xc6/0x110 [ 31.306881] mprotect_fixup+0x8d2/0xb30 [ 31.307394] do_mprotect_pkey+0x87e/0xd40 [ 31.307920] __x64_sys_mprotect+0x78/0xc0 [ 31.308435] do_syscall_64+0x3f/0x90 [ 31.308918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309555] [ 31.309772] Freed by task 214: [ 31.310174] kasan_save_stack+0x22/0x50 [ 31.310681] kasan_set_track+0x25/0x30 [ 31.311194] kasan_save_free_info+0x2b/0x50 [ 31.311729] __kasan_slab_free+0x10a/0x190 [ 31.312264] kmem_cache_free+0x10d/0x4d0 [ 31.312777] rcu_core+0x8c8/0x2860 [ 31.313232] __do_softirq+0x1b7/0x7d4 [ 31.313712] [ 31.313934] Last potentially related work creation: [ 31.314526] kasan_save_stack+0x22/0x50 [ 31.315030] __kasan_record_aux_stack+0x8e/0xa0 [ 31.315632] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.316275] remove_vma+0x139/0x170 [ 31.316750] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.317350] do_vmi_munmap+0x1f1/0x2b0 [ 31.317850] __vm_munmap+0x138/0x3a0 [ 31.318322] __x64_sys_munmap+0x59/0x80 [ 31.318822] do_syscall_64+0x3f/0x90 [ 31.319319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319958] [ 31.320181] The buggy address belongs to the object at ffff88800d828828 [ 31.320181] which belongs to the cache vm_area_struct of size 168 [ 31.321808] The buggy address is located 88 bytes inside of [ 31.321808] freed 168-byte region [ffff88800d828828, ffff88800d8288d0) [ 31.323239] [ 31.323461] The buggy address belongs to the physical page: [ 31.324127] page:000000000172c614 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd828 [ 31.325331] memcg:ffff88800ed14c01 [ 31.325788] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.326499] page_type: 0xffffffff() [ 31.326965] raw: 0100000000000200 ffff88800879fc80 ffffea0000357840 dead000000000005 [ 31.327919] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed14c01 [ 31.328830] page dumped because: kasan: bad access detected [ 31.329485] [ 31.329708] Memory state around the buggy address: [ 31.330293] ffff88800d828780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.331165] ffff88800d828800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.332028] >ffff88800d828880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.332894] ^ [ 31.333306] ffff88800d828900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.334171] ffff88800d828980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.335025] ================================================================== [ 31.335950] Disabling lock debugging due to kernel taint [ 33.993509] BUG: Bad rss-counter state mm:00000000784db839 type:MM_FILEPAGES val:33 [ 33.994640] BUG: Bad rss-counter state mm:00000000784db839 type:MM_ANONPAGES val:22 [ 34.497781] BUG: Bad rss-counter state mm:00000000bba5b2c4 type:MM_FILEPAGES val:33 [ 34.498850] BUG: Bad rss-counter state mm:00000000bba5b2c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20672' (ECDSA) to the list of known hosts. 2023/06/19 21:42:32 fuzzer started 2023/06/19 21:42:33 dialing manager at localhost:44161 2023/06/19 21:42:33 checking machine... 2023/06/19 21:42:33 checking revisions... [ 35.186574] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:42:33 testing simple program... [ 35.236455] cgroup: Unknown subsys name 'net' [ 35.299253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:42:32 Registers: info registers vcpu 0 RAX=ffff88800c5f9680 RBX=0000000000000000 RCX=ffffea0000317e00 RDX=ffffea0000317e01 RSI=000000000c5f8000 RDI=ffff888000000000 RBP=ffffffff8186b9c5 RSP=ffff888008d7fcc8 R8 =ffffea0000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88800c5f9680 R13=ffff8880087b6780 R14=ffffffff8186b9c5 R15=ffff88800e67f800 RIP=ffffffff8180c858 RFL=00000216 [----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 0000000000000000 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=00007fde28d60d20 CR3=000000000cb98000 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=f7f2fdee2867ce0f00000000000ae988 XMM05=d118f910c40778950000000000134620 XMM06=c291bd5c70af25b90000000000133410 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fa0bc692618 CR3=000000000ef1a000 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=32343a3132203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323337 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000