[ 23.668473] BUG: Bad rss-counter state mm:00000000de93fa8b type:MM_FILEPAGES val:33 [ 23.668494] BUG: Bad rss-counter state mm:00000000de93fa8b type:MM_ANONPAGES val:22 [ 23.776192] ================================================================== [ 23.776933] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.777698] Read of size 8 at addr ffff88801c097b38 by task sshd/218 [ 23.778317] [ 23.778494] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.779200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.780137] Call Trace: [ 23.780428] [ 23.780660] dump_stack_lvl+0x91/0xf0 [ 23.781054] print_report+0xcc/0x620 [ 23.781453] ? __virt_addr_valid+0x102/0x340 [ 23.781908] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.782432] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.782931] kasan_report+0xbe/0xf0 [ 23.783331] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.783817] vma_interval_tree_remove+0xc75/0xec0 [ 23.784164] vma_prepare+0xc54/0x11a0 [ 23.784445] __split_vma+0x5af/0x950 [ 23.784717] ? __pfx___split_vma+0x10/0x10 [ 23.785027] ? find_held_lock+0x2c/0x110 [ 23.785325] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.785661] ? lock_is_held_type+0x9f/0x120 [ 23.785988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.786360] ? mtree_range_walk+0x632/0x900 [ 23.786705] ? mas_walk+0x5c7/0x7c0 [ 23.787001] do_vmi_munmap+0x1f1/0x2b0 [ 23.787304] mmap_region+0x1f9/0x2660 [ 23.787597] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.787909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.788347] ? __pfx_lock_acquire+0x10/0x10 [ 23.788672] ? __pfx_mmap_region+0x10/0x10 [ 23.788999] ? security_mmap_addr+0x7d/0xa0 [ 23.789323] ? get_unmapped_area+0x1f5/0x3f0 [ 23.789655] do_mmap+0x854/0xf00 [ 23.789922] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.790223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.790564] ksys_mmap_pgoff+0x3af/0x500 [ 23.790873] do_syscall_64+0x3f/0x90 [ 23.791174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.791563] RIP: 0033:0x7f156d8fcd82 [ 23.791844] 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 [ 23.793142] RSP: 002b:00007fffc9724048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.793678] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f156d8fcd82 [ 23.794187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f156cd36000 [ 23.794705] RBP: 00007f156cd36000 R08: 0000000000000009 R09: 0000000000001000 [ 23.795235] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb10097ec0 [ 23.795760] R13: 00007fffc9724060 R14: 00007fffc9724090 R15: 00007fffc97243f0 [ 23.796286] [ 23.796472] [ 23.796606] Allocated by task 207: [ 23.796875] kasan_save_stack+0x22/0x50 [ 23.797181] kasan_set_track+0x25/0x30 [ 23.797483] __kasan_slab_alloc+0x59/0x70 [ 23.797803] kmem_cache_alloc+0x16b/0x370 [ 23.798115] vm_area_dup+0x20/0x160 [ 23.798395] __split_vma+0x170/0x950 [ 23.798670] split_vma+0xc6/0x110 [ 23.798923] mprotect_fixup+0x8d2/0xb30 [ 23.799241] do_mprotect_pkey+0x87e/0xd40 [ 23.799550] __x64_sys_mprotect+0x78/0xc0 [ 23.799870] do_syscall_64+0x3f/0x90 [ 23.800146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.800528] [ 23.800659] Freed by task 13: [ 23.800888] kasan_save_stack+0x22/0x50 [ 23.801182] kasan_set_track+0x25/0x30 [ 23.801477] kasan_save_free_info+0x2b/0x50 [ 23.801800] __kasan_slab_free+0x10a/0x190 [ 23.802119] kmem_cache_free+0x10d/0x4d0 [ 23.802425] rcu_core+0x8c8/0x2860 [ 23.802697] __do_softirq+0x1b7/0x7d4 [ 23.802999] [ 23.803135] Last potentially related work creation: [ 23.803490] kasan_save_stack+0x22/0x50 [ 23.803796] __kasan_record_aux_stack+0x8e/0xa0 [ 23.804147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.804541] remove_vma+0x139/0x170 [ 23.804810] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.805145] do_vmi_munmap+0x1f1/0x2b0 [ 23.805442] __vm_munmap+0x138/0x3a0 [ 23.805730] __x64_sys_munmap+0x59/0x80 [ 23.806030] do_syscall_64+0x3f/0x90 [ 23.806315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.806698] [ 23.806831] The buggy address belongs to the object at ffff88801c097ae0 [ 23.806831] which belongs to the cache vm_area_struct of size 168 [ 23.807735] The buggy address is located 88 bytes inside of [ 23.807735] freed 168-byte region [ffff88801c097ae0, ffff88801c097b88) [ 23.808584] [ 23.808716] The buggy address belongs to the physical page: [ 23.809117] page:000000008f046147 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c097 [ 23.809780] memcg:ffff88801a3cd501 [ 23.810046] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.810445] page_type: 0xffffffff() [ 23.810723] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.811287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3cd501 [ 23.811832] page dumped because: kasan: bad access detected [ 23.812230] [ 23.812363] Memory state around the buggy address: [ 23.812710] ffff88801c097a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.813226] ffff88801c097a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 23.813749] >ffff88801c097b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.814258] ^ [ 23.814623] ffff88801c097b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.815160] ffff88801c097c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.815670] ================================================================== [ 23.816215] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.163384] BUG: Bad rss-counter state mm:00000000d2110c5c type:MM_FILEPAGES val:33 [ 26.164582] BUG: Bad rss-counter state mm:00000000d2110c5c type:MM_ANONPAGES val:22 [ 26.711060] BUG: Bad rss-counter state mm:0000000073d81c07 type:MM_FILEPAGES val:33 [ 26.712264] BUG: Bad rss-counter state mm:0000000073d81c07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34331' (ECDSA) to the list of known hosts. 2023/06/21 07:24:17 fuzzer started 2023/06/21 07:24:17 dialing manager at localhost:36067 2023/06/21 07:24:17 checking machine... 2023/06/21 07:24:17 checking revisions... [ 27.348380] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:24:18 testing simple program... [ 27.404996] cgroup: Unknown subsys name 'net' [ 27.486055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:24:17 Registers: info registers vcpu 0 RAX=03f5d7afbc441600 RBX=fffffbfff0a80fa0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffffffff85407cf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888008c04000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce2c2b8 R15=0000000000000000 RIP=ffffffff812d9041 RFL=00000086 [--S--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 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=00005598b56e8fe0 CR3=000000000d6f4000 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=2037313a34323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a34323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002cb2ee9 RSI=ffffffff838728bc RDI=ffff888016597708 RBP=ffff888016597760 RSP=ffff888016597698 R8 =0000000000000001 R9 =ffff888016597748 R10=0000000000038001 R11=000000000008b5b9 R12=ffff888016597768 R13=ffff888016597750 R14=ffff888016597749 R15=ffff888016597708 RIP=ffffffff811306da 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 00007fb8cc537900 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=00007fff0ef95000 CR3=000000001a002000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000