syzkaller login: [ 30.618610] BUG: Bad rss-counter state mm:00000000aae2108a type:MM_FILEPAGES val:33 [ 30.619592] BUG: Bad rss-counter state mm:00000000aae2108a type:MM_ANONPAGES val:22 [ 30.783290] ================================================================== [ 30.784354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.785492] Read of size 8 at addr ffff888015eca798 by task sshd/219 [ 30.786513] [ 30.786804] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.787871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.789083] Call Trace: [ 30.789476] [ 30.789824] dump_stack_lvl+0x91/0xf0 [ 30.790442] print_report+0xcc/0x620 [ 30.791044] ? __virt_addr_valid+0x102/0x340 [ 30.791725] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792485] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.793293] kasan_report+0xbe/0xf0 [ 30.793910] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794720] vma_interval_tree_remove+0xc75/0xec0 [ 30.795484] vma_prepare+0xc54/0x11a0 [ 30.796090] __split_vma+0x5af/0x950 [ 30.796689] ? __pfx___split_vma+0x10/0x10 [ 30.797376] ? find_held_lock+0x2c/0x110 [ 30.798057] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.798772] ? lock_is_held_type+0x9f/0x120 [ 30.799456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.800220] ? mtree_range_walk+0x632/0x900 [ 30.800931] ? mas_walk+0x5c7/0x7c0 [ 30.801530] do_vmi_munmap+0x1f1/0x2b0 [ 30.802133] mmap_region+0x1f9/0x2660 [ 30.802728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.803362] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.804233] ? __pfx_lock_acquire+0x10/0x10 [ 30.804914] ? __pfx_mmap_region+0x10/0x10 [ 30.805564] ? security_mmap_addr+0x7d/0xa0 [ 30.806213] ? get_unmapped_area+0x1f5/0x3f0 [ 30.806888] do_mmap+0x854/0xf00 [ 30.807433] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.808051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.808778] ksys_mmap_pgoff+0x3af/0x500 [ 30.809408] do_syscall_64+0x3f/0x90 [ 30.810026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810792] RIP: 0033:0x7f75eaed3d82 [ 30.811332] 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 [ 30.813978] RSP: 002b:00007ffeff441df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.815089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75eaed3d82 [ 30.816137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75ea30d000 [ 30.817199] RBP: 00007f75ea30d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.818109] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f39baa2f70 [ 30.818988] R13: 00007ffeff441e10 R14: 00007ffeff441e40 R15: 00007ffeff4421a0 [ 30.819847] [ 30.820156] [ 30.820378] Allocated by task 212: [ 30.820810] kasan_save_stack+0x22/0x50 [ 30.821332] kasan_set_track+0x25/0x30 [ 30.821834] __kasan_slab_alloc+0x59/0x70 [ 30.822364] kmem_cache_alloc+0x16b/0x370 [ 30.822882] vm_area_dup+0x20/0x160 [ 30.823333] __split_vma+0x170/0x950 [ 30.823795] split_vma+0xc6/0x110 [ 30.824237] mprotect_fixup+0x8d2/0xb30 [ 30.824739] do_mprotect_pkey+0x87e/0xd40 [ 30.825256] __x64_sys_mprotect+0x78/0xc0 [ 30.825770] do_syscall_64+0x3f/0x90 [ 30.826245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.826877] [ 30.827089] Freed by task 212: [ 30.827479] kasan_save_stack+0x22/0x50 [ 30.827978] kasan_set_track+0x25/0x30 [ 30.828468] kasan_save_free_info+0x2b/0x50 [ 30.829012] __kasan_slab_free+0x10a/0x190 [ 30.829538] kmem_cache_free+0x10d/0x4d0 [ 30.830041] rcu_core+0x8c8/0x2860 [ 30.830481] __do_softirq+0x1b7/0x7d4 [ 30.830994] [ 30.831222] Last potentially related work creation: [ 30.831815] kasan_save_stack+0x22/0x50 [ 30.832321] __kasan_record_aux_stack+0x8e/0xa0 [ 30.832909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.833573] remove_vma+0x139/0x170 [ 30.834046] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.834608] do_vmi_munmap+0x1f1/0x2b0 [ 30.835091] __vm_munmap+0x138/0x3a0 [ 30.835560] __x64_sys_munmap+0x59/0x80 [ 30.836055] do_syscall_64+0x3f/0x90 [ 30.836530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837194] [ 30.837410] The buggy address belongs to the object at ffff888015eca740 [ 30.837410] which belongs to the cache vm_area_struct of size 168 [ 30.838876] The buggy address is located 88 bytes inside of [ 30.838876] freed 168-byte region [ffff888015eca740, ffff888015eca7e8) [ 30.840272] [ 30.840487] The buggy address belongs to the physical page: [ 30.841153] page:00000000ccdee596 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15eca [ 30.842247] memcg:ffff888009884e01 [ 30.842685] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.843334] page_type: 0xffffffff() [ 30.843784] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.844710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009884e01 [ 30.845645] page dumped because: kasan: bad access detected [ 30.846305] [ 30.846517] Memory state around the buggy address: [ 30.847101] ffff888015eca680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.847962] ffff888015eca700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.848832] >ffff888015eca780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.849684] ^ [ 30.850177] ffff888015eca800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.851028] ffff888015eca880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.851878] ================================================================== [ 30.853089] Disabling lock debugging due to kernel taint [ 33.895449] BUG: Bad rss-counter state mm:0000000008c61005 type:MM_FILEPAGES val:33 [ 33.896450] BUG: Bad rss-counter state mm:0000000008c61005 type:MM_ANONPAGES val:22 [ 34.365687] BUG: Bad rss-counter state mm:000000002a76bf5a type:MM_FILEPAGES val:33 [ 34.366840] BUG: Bad rss-counter state mm:000000002a76bf5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5589' (ECDSA) to the list of known hosts. 2023/06/20 19:49:04 fuzzer started 2023/06/20 19:49:04 dialing manager at localhost:36067 2023/06/20 19:49:04 checking machine... 2023/06/20 19:49:04 checking revisions... [ 35.068201] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:49:04 testing simple program... [ 35.123290] cgroup: Unknown subsys name 'net' [ 35.162945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:49:04 Registers: info registers vcpu 0 RAX=ffff88801c933f00 RBX=ffff88800e4062c8 RCX=1ffff11001e79af8 RDX=dffffc0000000000 RSI=ffff88801c9e1c28 RDI=ffff88800e4062f8 RBP=ffff88800f3cd790 RSP=ffff888016ebf6b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801c9e1b40 R13=0000000000000000 R14=ffff88800ed2c638 R15=ffff88800ed2c5f0 RIP=ffffffff81847688 RFL=00000046 [---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 00007fdaf3d18900 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=00007fdaf42cf618 CR3=000000001a2ba000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007ff173e4f8f0 CR3=000000000d7b4000 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=c3f25eb0c09e41bd3048975b920034d8 XMM02=2c67c8bc2e329bc3000000000011a0e0 XMM03=fb795ef6d65770560000000000121988 XMM04=f26eb6bbfbff515200000000000ae988 XMM05=73e44a559922220c0000000000132210 XMM06=806171799158d9670000000000131638 XMM07=e042d86d42eb936e0000000000121c08 XMM08=fbdad83cede098fa000000000011a140 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000