syzkaller login: [ 40.357744] BUG: Bad rss-counter state mm:000000006b73c6a7 type:MM_FILEPAGES val:33 [ 40.358936] BUG: Bad rss-counter state mm:000000006b73c6a7 type:MM_ANONPAGES val:22 [ 40.394787] ================================================================== [ 40.395840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.396975] Read of size 8 at addr ffff8880143364e0 by task sshd/220 [ 40.397865] [ 40.398170] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.399132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.400337] Call Trace: [ 40.400661] [ 40.400996] dump_stack_lvl+0x91/0xf0 [ 40.401566] print_report+0xcc/0x620 [ 40.402076] ? __virt_addr_valid+0x102/0x340 [ 40.402801] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.403424] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.404059] kasan_report+0xbe/0xf0 [ 40.404536] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.405177] vma_interval_tree_remove+0xc75/0xec0 [ 40.405800] vma_prepare+0xc54/0x11a0 [ 40.406297] __split_vma+0x5af/0x950 [ 40.406788] ? __pfx___split_vma+0x10/0x10 [ 40.407342] ? find_held_lock+0x2c/0x110 [ 40.407889] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.408484] ? lock_is_held_type+0x9f/0x120 [ 40.409042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.409668] ? mtree_range_walk+0x632/0x900 [ 40.410238] ? mas_walk+0x5c7/0x7c0 [ 40.410727] do_vmi_munmap+0x1f1/0x2b0 [ 40.411234] mmap_region+0x1f9/0x2660 [ 40.411732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.412299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.413036] ? __pfx_lock_acquire+0x10/0x10 [ 40.413587] ? __pfx_mmap_region+0x10/0x10 [ 40.414135] ? security_mmap_addr+0x7d/0xa0 [ 40.414685] ? get_unmapped_area+0x1f5/0x3f0 [ 40.415252] do_mmap+0x854/0xf00 [ 40.415709] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.416236] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.416817] ksys_mmap_pgoff+0x3af/0x500 [ 40.417342] do_syscall_64+0x3f/0x90 [ 40.417838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.418504] RIP: 0033:0x7fb28a0dbd82 [ 40.418974] 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 [ 40.421193] RSP: 002b:00007ffc1187eaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.422135] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb28a0dbd82 [ 40.423005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb289515000 [ 40.424090] RBP: 00007fb289515000 R08: 0000000000000009 R09: 0000000000001000 [ 40.425024] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e20c9ecec0 [ 40.425942] R13: 00007ffc1187eac0 R14: 00007ffc1187eaf0 R15: 00007ffc1187ee50 [ 40.426827] [ 40.427128] [ 40.427348] Allocated by task 213: [ 40.427791] kasan_save_stack+0x22/0x50 [ 40.428331] kasan_set_track+0x25/0x30 [ 40.428844] __kasan_slab_alloc+0x59/0x70 [ 40.429388] kmem_cache_alloc+0x16b/0x370 [ 40.429927] vm_area_dup+0x20/0x160 [ 40.430394] __split_vma+0x170/0x950 [ 40.430871] split_vma+0xc6/0x110 [ 40.431328] mprotect_fixup+0x8d2/0xb30 [ 40.431849] do_mprotect_pkey+0x87e/0xd40 [ 40.432396] __x64_sys_mprotect+0x78/0xc0 [ 40.432943] do_syscall_64+0x3f/0x90 [ 40.433432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.434101] [ 40.434320] Freed by task 19: [ 40.434719] kasan_save_stack+0x22/0x50 [ 40.435237] kasan_set_track+0x25/0x30 [ 40.435749] kasan_save_free_info+0x2b/0x50 [ 40.436304] __kasan_slab_free+0x10a/0x190 [ 40.436855] kmem_cache_free+0x10d/0x4d0 [ 40.437373] rcu_core+0x8c8/0x2860 [ 40.437834] __do_softirq+0x1b7/0x7d4 [ 40.438324] [ 40.438544] Last potentially related work creation: [ 40.439145] kasan_save_stack+0x22/0x50 [ 40.439673] __kasan_record_aux_stack+0x8e/0xa0 [ 40.440285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.440946] remove_vma+0x139/0x170 [ 40.441411] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.441990] do_vmi_munmap+0x1f1/0x2b0 [ 40.442493] __vm_munmap+0x138/0x3a0 [ 40.442971] __x64_sys_munmap+0x59/0x80 [ 40.443490] do_syscall_64+0x3f/0x90 [ 40.443985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.444648] [ 40.444869] Second to last potentially related work creation: [ 40.445577] kasan_save_stack+0x22/0x50 [ 40.446099] __kasan_record_aux_stack+0x8e/0xa0 [ 40.446691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.447363] remove_vma+0x139/0x170 [ 40.447828] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.448422] do_vmi_munmap+0x1f1/0x2b0 [ 40.448921] mmap_region+0x1f9/0x2660 [ 40.449420] do_mmap+0x854/0xf00 [ 40.449868] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.450367] ksys_mmap_pgoff+0x3af/0x500 [ 40.450893] do_syscall_64+0x3f/0x90 [ 40.451376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.452058] [ 40.452279] The buggy address belongs to the object at ffff888014336488 [ 40.452279] which belongs to the cache vm_area_struct of size 168 [ 40.453797] The buggy address is located 88 bytes inside of [ 40.453797] freed 168-byte region [ffff888014336488, ffff888014336530) [ 40.455246] [ 40.455468] The buggy address belongs to the physical page: [ 40.456174] page:00000000421d61a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14336 [ 40.457304] memcg:ffff88800e1df401 [ 40.457744] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.458466] page_type: 0xffffffff() [ 40.458927] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.459870] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1df401 [ 40.460825] page dumped because: kasan: bad access detected [ 40.461508] [ 40.461730] Memory state around the buggy address: [ 40.462332] ffff888014336380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.463212] ffff888014336400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.464111] >ffff888014336480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.464983] ^ [ 40.465761] ffff888014336500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.466732] ffff888014336580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.467609] ================================================================== [ 40.468592] Disabling lock debugging due to kernel taint [ 43.217161] BUG: Bad rss-counter state mm:00000000ed1f8b28 type:MM_FILEPAGES val:33 [ 43.218317] BUG: Bad rss-counter state mm:00000000ed1f8b28 type:MM_ANONPAGES val:22 [ 43.712732] BUG: Bad rss-counter state mm:000000002dcf88c2 type:MM_FILEPAGES val:33 [ 43.714000] BUG: Bad rss-counter state mm:000000002dcf88c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47297' (ECDSA) to the list of known hosts. 2023/06/19 16:30:47 fuzzer started 2023/06/19 16:30:47 dialing manager at localhost:44161 2023/06/19 16:30:47 checking machine... 2023/06/19 16:30:47 checking revisions... [ 44.341336] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:30:47 testing simple program... [ 44.393251] cgroup: Unknown subsys name 'net' [ 44.430083] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:30:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100285ae62 RSI=ffff8880142d7e58 RDI=ffff8880142d7318 RBP=1ffff1100285afd1 RSP=ffff8880142d7258 R8 =0000000000000001 R9 =ffff8880142d7308 R10=0000000000038001 R11=00000000000223ea R12=ffff8880142d7328 R13=ffff8880142d7310 R14=ffff8880142d7e58 R15=ffff8880142d72c8 RIP=ffffffff81131c60 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 00007f4a88748900 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=00007f4a87b7b2e0 CR3=000000000cbca000 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=277b53323f8864c400000000000ae988 XMM05=7ca4f1c0f146543d00000000001378e0 XMM06=4fda316b135da52b0000000000136360 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=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f19f868 RSP=ffff88800f19f7a0 R8 =ffffffff864b024a R9 =ffff88800f19f850 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800f19f870 R13=ffff88800f19f858 R14=ffff88800f19f851 R15=ffff88800f19f810 RIP=ffffffff81130ad6 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 00007f0be13d6900 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=00007fff84ef2000 CR3=000000000ed5e000 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