syzkaller login: [ 31.395348] BUG: Bad rss-counter state mm:0000000023d2b7ba type:MM_FILEPAGES val:33 [ 31.396063] BUG: Bad rss-counter state mm:0000000023d2b7ba type:MM_ANONPAGES val:22 [ 31.570792] ================================================================== [ 31.571991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.573270] Read of size 8 at addr ffff88800d4a9968 by task sshd/220 [ 31.574393] [ 31.574684] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.575876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.577218] Call Trace: [ 31.577689] [ 31.578068] dump_stack_lvl+0x91/0xf0 [ 31.578732] print_report+0xcc/0x620 [ 31.579386] ? __virt_addr_valid+0x102/0x340 [ 31.580144] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.580986] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.581831] kasan_report+0xbe/0xf0 [ 31.582469] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.583317] vma_interval_tree_remove+0xc75/0xec0 [ 31.584026] vma_prepare+0xc54/0x11a0 [ 31.584610] __split_vma+0x5af/0x950 [ 31.585171] ? __pfx___split_vma+0x10/0x10 [ 31.585787] ? find_held_lock+0x2c/0x110 [ 31.586325] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.586903] ? lock_is_held_type+0x9f/0x120 [ 31.587453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.588024] ? mtree_range_walk+0x632/0x900 [ 31.588559] ? mas_walk+0x5c7/0x7c0 [ 31.589013] do_vmi_munmap+0x1f1/0x2b0 [ 31.589581] mmap_region+0x1f9/0x2660 [ 31.590150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.590769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.591623] ? __pfx_lock_acquire+0x10/0x10 [ 31.592251] ? __pfx_mmap_region+0x10/0x10 [ 31.592892] ? security_mmap_addr+0x7d/0xa0 [ 31.593556] ? get_unmapped_area+0x1f5/0x3f0 [ 31.594204] do_mmap+0x854/0xf00 [ 31.594735] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.595333] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.595995] ksys_mmap_pgoff+0x3af/0x500 [ 31.596623] do_syscall_64+0x3f/0x90 [ 31.597187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.598001] RIP: 0033:0x7f5317aa4d82 [ 31.598571] 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 [ 31.601111] RSP: 002b:00007ffc9913b148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.602214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5317aa4d82 [ 31.603225] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5316ede000 [ 31.604239] RBP: 00007f5316ede000 R08: 0000000000000009 R09: 0000000000001000 [ 31.605259] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561da67ecec0 [ 31.606301] R13: 00007ffc9913b160 R14: 00007ffc9913b190 R15: 00007ffc9913b4f0 [ 31.607335] [ 31.607680] [ 31.607930] Allocated by task 213: [ 31.608454] kasan_save_stack+0x22/0x50 [ 31.609046] kasan_set_track+0x25/0x30 [ 31.609672] __kasan_slab_alloc+0x59/0x70 [ 31.610298] kmem_cache_alloc+0x16b/0x370 [ 31.610917] vm_area_dup+0x20/0x160 [ 31.611465] __split_vma+0x170/0x950 [ 31.612014] split_vma+0xc6/0x110 [ 31.612547] mprotect_fixup+0x8d2/0xb30 [ 31.613135] do_mprotect_pkey+0x87e/0xd40 [ 31.613790] __x64_sys_mprotect+0x78/0xc0 [ 31.614428] do_syscall_64+0x3f/0x90 [ 31.614987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615761] [ 31.616013] Freed by task 213: [ 31.616493] kasan_save_stack+0x22/0x50 [ 31.617088] kasan_set_track+0x25/0x30 [ 31.617709] kasan_save_free_info+0x2b/0x50 [ 31.618350] __kasan_slab_free+0x10a/0x190 [ 31.618980] kmem_cache_free+0x10d/0x4d0 [ 31.619596] rcu_core+0x8c8/0x2860 [ 31.620117] __do_softirq+0x1b7/0x7d4 [ 31.620695] [ 31.620946] Last potentially related work creation: [ 31.621686] kasan_save_stack+0x22/0x50 [ 31.622280] __kasan_record_aux_stack+0x8e/0xa0 [ 31.622975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.623742] remove_vma+0x139/0x170 [ 31.624273] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.624948] do_vmi_munmap+0x1f1/0x2b0 [ 31.625555] __vm_munmap+0x138/0x3a0 [ 31.626104] __x64_sys_munmap+0x59/0x80 [ 31.626699] do_syscall_64+0x3f/0x90 [ 31.627256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.628033] [ 31.628284] Second to last potentially related work creation: [ 31.629098] kasan_save_stack+0x22/0x50 [ 31.629742] __kasan_record_aux_stack+0x8e/0xa0 [ 31.630432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.631188] remove_vma+0x139/0x170 [ 31.631730] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.632400] do_vmi_munmap+0x1f1/0x2b0 [ 31.632972] mmap_region+0x1f9/0x2660 [ 31.633570] do_mmap+0x854/0xf00 [ 31.634078] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.634672] ksys_mmap_pgoff+0x7d/0x500 [ 31.635249] do_syscall_64+0x3f/0x90 [ 31.635825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.636599] [ 31.636850] The buggy address belongs to the object at ffff88800d4a9910 [ 31.636850] which belongs to the cache vm_area_struct of size 168 [ 31.638646] The buggy address is located 88 bytes inside of [ 31.638646] freed 168-byte region [ffff88800d4a9910, ffff88800d4a99b8) [ 31.640362] [ 31.640636] The buggy address belongs to the physical page: [ 31.641473] page:000000003a042aa5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4a9 [ 31.642747] memcg:ffff88800d5fe901 [ 31.643211] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.643918] page_type: 0xffffffff() [ 31.644407] raw: 0100000000000200 ffff8880087a0c80 ffffea00003751c0 dead000000000004 [ 31.645417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5fe901 [ 31.646394] page dumped because: kasan: bad access detected [ 31.647108] [ 31.647337] Memory state around the buggy address: [ 31.647971] ffff88800d4a9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.648901] ffff88800d4a9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.649843] >ffff88800d4a9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.650753] ^ [ 31.651610] ffff88800d4a9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.652549] ffff88800d4a9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.653502] ================================================================== [ 31.654556] Disabling lock debugging due to kernel taint [ 34.100607] BUG: Bad rss-counter state mm:000000000ad85eaa type:MM_FILEPAGES val:33 [ 34.101824] BUG: Bad rss-counter state mm:000000000ad85eaa type:MM_ANONPAGES val:22 [ 34.600330] BUG: Bad rss-counter state mm:000000007670b4b2 type:MM_FILEPAGES val:33 [ 34.601447] BUG: Bad rss-counter state mm:000000007670b4b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47677' (ECDSA) to the list of known hosts. 2023/06/21 02:04:06 fuzzer started 2023/06/21 02:04:06 dialing manager at localhost:36067 2023/06/21 02:04:06 checking machine... 2023/06/21 02:04:06 checking revisions... [ 35.326490] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:04:07 testing simple program... [ 35.374910] cgroup: Unknown subsys name 'net' [ 35.429006] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:04:06 Registers: info registers vcpu 0 RAX=1ffffffff0bb1340 RBX=ffffffff85d89a04 RCX=ffffffff810bd032 RDX=0000000000000006 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888016f4f478 R8 =ffffffff8608a556 R9 =ffff888016f4f5c0 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000213 [----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 00007fc90f29e700 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=00007ff98675f4b0 CR3=000000000c880000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36313639352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363136 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f161f21f618 CR3=000000000c880000 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=2036303a34303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a34303a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000