syzkaller login: [ 38.839291] BUG: Bad rss-counter state mm:000000006390fee8 type:MM_FILEPAGES val:33 [ 38.840617] BUG: Bad rss-counter state mm:000000006390fee8 type:MM_ANONPAGES val:22 [ 38.972188] ================================================================== [ 38.973279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.974375] Read of size 8 at addr ffff888019db55c8 by task sshd/219 [ 38.975282] [ 38.975625] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.976676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.977550] Call Trace: [ 38.977793] [ 38.978029] dump_stack_lvl+0x91/0xf0 [ 38.978399] print_report+0xcc/0x620 [ 38.978770] ? __virt_addr_valid+0x102/0x340 [ 38.979187] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.979651] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980119] kasan_report+0xbe/0xf0 [ 38.980479] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980956] vma_interval_tree_remove+0xc75/0xec0 [ 38.981417] vma_prepare+0xc54/0x11a0 [ 38.981785] __split_vma+0x5af/0x950 [ 38.982151] ? __pfx___split_vma+0x10/0x10 [ 38.982552] ? find_held_lock+0x2c/0x110 [ 38.982954] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.983393] ? lock_is_held_type+0x9f/0x120 [ 38.983817] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.984279] ? mtree_range_walk+0x632/0x900 [ 38.984716] ? mas_walk+0x5c7/0x7c0 [ 38.985097] do_vmi_munmap+0x1f1/0x2b0 [ 38.985484] mmap_region+0x1f9/0x2660 [ 38.985853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.986252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.986796] ? __pfx_lock_acquire+0x10/0x10 [ 38.987209] ? __pfx_mmap_region+0x10/0x10 [ 38.987612] ? security_mmap_addr+0x7d/0xa0 [ 38.988015] ? get_unmapped_area+0x1f5/0x3f0 [ 38.988440] do_mmap+0x854/0xf00 [ 38.988801] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.989200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.989639] ksys_mmap_pgoff+0x3af/0x500 [ 38.990034] do_syscall_64+0x3f/0x90 [ 38.990432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.990952] RIP: 0033:0x7f89a4e42d82 [ 38.991321] 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 [ 38.992946] RSP: 002b:00007ffebf835b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.993644] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89a4e42d82 [ 38.994328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89a427c000 [ 38.994976] RBP: 00007f89a427c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.995650] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559080c0bf70 [ 38.996341] R13: 00007ffebf835bb0 R14: 00007ffebf835be0 R15: 00007ffebf835f40 [ 38.997032] [ 38.997262] [ 38.997426] Allocated by task 212: [ 38.997758] kasan_save_stack+0x22/0x50 [ 38.998146] kasan_set_track+0x25/0x30 [ 38.998528] __kasan_slab_alloc+0x59/0x70 [ 38.998931] kmem_cache_alloc+0x16b/0x370 [ 38.999338] vm_area_dup+0x20/0x160 [ 38.999690] __split_vma+0x170/0x950 [ 39.000056] split_vma+0xc6/0x110 [ 39.000396] mprotect_fixup+0x8d2/0xb30 [ 39.000797] do_mprotect_pkey+0x87e/0xd40 [ 39.001214] __x64_sys_mprotect+0x78/0xc0 [ 39.001618] do_syscall_64+0x3f/0x90 [ 39.001984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002483] [ 39.002650] Freed by task 212: [ 39.002957] kasan_save_stack+0x22/0x50 [ 39.003346] kasan_set_track+0x25/0x30 [ 39.003727] kasan_save_free_info+0x2b/0x50 [ 39.004138] __kasan_slab_free+0x10a/0x190 [ 39.004577] kmem_cache_free+0x10d/0x4d0 [ 39.004998] rcu_core+0x8c8/0x2860 [ 39.005353] __do_softirq+0x1b7/0x7d4 [ 39.005727] [ 39.005892] Last potentially related work creation: [ 39.006351] kasan_save_stack+0x22/0x50 [ 39.006776] __kasan_record_aux_stack+0x8e/0xa0 [ 39.007234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007749] remove_vma+0x139/0x170 [ 39.008100] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.008537] do_vmi_munmap+0x1f1/0x2b0 [ 39.008935] __vm_munmap+0x138/0x3a0 [ 39.009305] __x64_sys_munmap+0x59/0x80 [ 39.009694] do_syscall_64+0x3f/0x90 [ 39.010074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.010591] [ 39.010755] The buggy address belongs to the object at ffff888019db5570 [ 39.010755] which belongs to the cache vm_area_struct of size 168 [ 39.011920] The buggy address is located 88 bytes inside of [ 39.011920] freed 168-byte region [ffff888019db5570, ffff888019db5618) [ 39.013044] [ 39.013220] The buggy address belongs to the physical page: [ 39.013740] page:00000000fb8462de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19db5 [ 39.014607] memcg:ffff88801475bf01 [ 39.014948] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.015470] page_type: 0xffffffff() [ 39.015837] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.016561] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801475bf01 [ 39.017316] page dumped because: kasan: bad access detected [ 39.017843] [ 39.018008] Memory state around the buggy address: [ 39.018456] ffff888019db5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.019134] ffff888019db5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.019814] >ffff888019db5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.020485] ^ [ 39.021000] ffff888019db5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.021660] ffff888019db5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.022314] ================================================================== [ 39.023083] Disabling lock debugging due to kernel taint [ 40.977071] BUG: Bad rss-counter state mm:00000000b2af99ce type:MM_FILEPAGES val:33 [ 40.978241] BUG: Bad rss-counter state mm:00000000b2af99ce type:MM_ANONPAGES val:22 [ 41.410708] BUG: Bad rss-counter state mm:0000000006a881da type:MM_FILEPAGES val:33 [ 41.411329] BUG: Bad rss-counter state mm:0000000006a881da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8274' (ECDSA) to the list of known hosts. 2023/06/19 18:18:07 fuzzer started 2023/06/19 18:18:07 dialing manager at localhost:44161 2023/06/19 18:18:07 checking machine... 2023/06/19 18:18:07 checking revisions... [ 42.073071] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:18:07 testing simple program... [ 42.123168] cgroup: Unknown subsys name 'net' [ 42.166213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:17:58 Registers: info registers vcpu 0 RAX=000000000000000b RBX=0000000000000001 RCX=ffffffff81ef60e9 RDX=000000000000000b RSI=ffffffff861c8d68 RDI=ffffffff85e5da3c RBP=ffff888016da79f8 RSP=ffff888016da78f8 R8 =ffffffff861c8d68 R9 =ffff888016da79e0 R10=0000000000038001 R11=000000000003919a R12=ffffffff85e5da64 R13=ffff888016da79e8 R14=ffff888016da79e1 R15=ffff888016da79a0 RIP=ffffffff8112fc21 RFL=00000212 [----A--] 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 00007f7e2509c900 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=00007ffc3aa71000 CR3=000000000dfd4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f72726c6180 CR3=000000000c7b4000 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=f9cd56a1b1b97caa6d4c9157fb594921 XMM02=000000000011ced8ec2efd57dc4c00df XMM03=0000000000124378c259af02c7c75814 XMM04=f1ffc4df80de208000000000000ae988 XMM05=dfcdbad4f1609c370000000000133f10 XMM06=237d545a628647280000000000132d78 XMM07=e042d86d42eb936e00000000001245f8 XMM08=c259af02c7c75814000000000011cf38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000