syzkaller login: [ 45.801507] BUG: Bad rss-counter state mm:000000000eb0142d type:MM_FILEPAGES val:33 [ 45.802471] BUG: Bad rss-counter state mm:000000000eb0142d type:MM_ANONPAGES val:22 [ 45.977187] ================================================================== [ 45.977872] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.978527] Read of size 8 at addr ffff88801a2bced8 by task sshd/225 [ 45.979085] [ 45.979233] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 45.979862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.980531] Call Trace: [ 45.980752] [ 45.981149] dump_stack_lvl+0x91/0xf0 [ 45.981525] print_report+0xcc/0x620 [ 45.981856] ? __virt_addr_valid+0x102/0x340 [ 45.982231] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.982649] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.983080] kasan_report+0xbe/0xf0 [ 45.983440] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.983895] vma_interval_tree_remove+0xc75/0xec0 [ 45.984308] vma_prepare+0xc54/0x11a0 [ 45.984650] __split_vma+0x5af/0x950 [ 45.984985] ? __pfx___split_vma+0x10/0x10 [ 45.985355] ? find_held_lock+0x2c/0x110 [ 45.985731] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.986130] ? lock_is_held_type+0x9f/0x120 [ 45.986513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.986943] ? mtree_range_walk+0x632/0x900 [ 45.987328] ? mas_walk+0x5c7/0x7c0 [ 45.987676] do_vmi_munmap+0x1f1/0x2b0 [ 45.988022] mmap_region+0x1f9/0x2660 [ 45.988363] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.988724] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.989231] ? __pfx_lock_acquire+0x10/0x10 [ 45.989619] ? __pfx_mmap_region+0x10/0x10 [ 45.989996] ? security_mmap_addr+0x7d/0xa0 [ 45.990376] ? get_unmapped_area+0x1f5/0x3f0 [ 45.990755] do_mmap+0x854/0xf00 [ 45.991066] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.991433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.991860] ksys_mmap_pgoff+0x3af/0x500 [ 45.992221] do_syscall_64+0x3f/0x90 [ 45.992559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.993135] RIP: 0033:0x7f14ce099d82 [ 45.993444] 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 [ 45.994874] RSP: 002b:00007ffc9e7d91f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.995485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14ce099d82 [ 45.996068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14cd4d3000 [ 45.996651] RBP: 00007f14cd4d3000 R08: 0000000000000009 R09: 0000000000001000 [ 45.997234] R10: 0000000000000812 R11: 0000000000000206 R12: 000056469f430ec0 [ 45.997817] R13: 00007ffc9e7d9210 R14: 00007ffc9e7d9240 R15: 00007ffc9e7d95a0 [ 45.998402] [ 45.998609] [ 45.998764] Allocated by task 218: [ 45.999062] kasan_save_stack+0x22/0x50 [ 45.999416] kasan_set_track+0x25/0x30 [ 45.999786] __kasan_slab_alloc+0x59/0x70 [ 46.000141] kmem_cache_alloc+0x16b/0x370 [ 46.000504] vm_area_dup+0x20/0x160 [ 46.000822] __split_vma+0x170/0x950 [ 46.001142] split_vma+0xc6/0x110 [ 46.001445] mprotect_fixup+0x8d2/0xb30 [ 46.001808] do_mprotect_pkey+0x87e/0xd40 [ 46.002181] __x64_sys_mprotect+0x78/0xc0 [ 46.002528] do_syscall_64+0x3f/0x90 [ 46.002850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.003283] [ 46.003432] Freed by task 218: [ 46.003736] kasan_save_stack+0x22/0x50 [ 46.004079] kasan_set_track+0x25/0x30 [ 46.004419] kasan_save_free_info+0x2b/0x50 [ 46.004792] __kasan_slab_free+0x10a/0x190 [ 46.005158] kmem_cache_free+0x10d/0x4d0 [ 46.005513] rcu_core+0x8c8/0x2860 [ 46.005827] __do_softirq+0x1b7/0x7d4 [ 46.006157] [ 46.006305] Last potentially related work creation: [ 46.006700] kasan_save_stack+0x22/0x50 [ 46.007044] __kasan_record_aux_stack+0x8e/0xa0 [ 46.007443] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.007896] remove_vma+0x139/0x170 [ 46.008209] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.008584] do_vmi_munmap+0x1f1/0x2b0 [ 46.008919] __vm_munmap+0x138/0x3a0 [ 46.009244] __x64_sys_munmap+0x59/0x80 [ 46.009594] do_syscall_64+0x3f/0x90 [ 46.009934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.010381] [ 46.010537] The buggy address belongs to the object at ffff88801a2bce80 [ 46.010537] which belongs to the cache vm_area_struct of size 168 [ 46.011551] The buggy address is located 88 bytes inside of [ 46.011551] freed 168-byte region [ffff88801a2bce80, ffff88801a2bcf28) [ 46.012520] [ 46.012667] The buggy address belongs to the physical page: [ 46.013124] page:0000000056f19ce9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2bc [ 46.013896] memcg:ffff888015a50201 [ 46.014189] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.014627] page_type: 0xffffffff() [ 46.014936] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 46.015558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a50201 [ 46.016183] page dumped because: kasan: bad access detected [ 46.016627] [ 46.016777] Memory state around the buggy address: [ 46.017173] ffff88801a2bcd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.017755] ffff88801a2bce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 46.018333] >ffff88801a2bce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.018906] ^ [ 46.019404] ffff88801a2bcf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 46.020008] ffff88801a2bcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 46.020586] ================================================================== [ 46.021328] Disabling lock debugging due to kernel taint [ 48.292947] BUG: Bad rss-counter state mm:0000000071a1bee7 type:MM_FILEPAGES val:33 [ 48.294111] BUG: Bad rss-counter state mm:0000000071a1bee7 type:MM_ANONPAGES val:22 [ 48.731479] BUG: Bad rss-counter state mm:00000000ac435d38 type:MM_FILEPAGES val:33 [ 48.732512] BUG: Bad rss-counter state mm:00000000ac435d38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48370' (ECDSA) to the list of known hosts. 2023/06/21 00:06:00 fuzzer started 2023/06/21 00:06:00 dialing manager at localhost:36067 2023/06/21 00:06:01 checking machine... 2023/06/21 00:06:01 checking revisions... [ 50.092418] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:06:01 testing simple program... [ 50.134713] cgroup: Unknown subsys name 'net' [ 50.184917] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 00:05:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00005645146e7218 CR3=0000000005482000 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=00007f1a0257c5100000559865a43790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016ef9b40 RSI=ffffffff8185bace RDI=ffff8880101b7f58 RBP=ffff8880101b7f58 RSP=ffff8880101b7f20 R8 =0000000000000005 R9 =00000000fffffdfc R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880101b7f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff813907f1 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f787343c900 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=00007ffef8576000 CR3=000000000c9ea000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000