syzkaller login: [ 35.512553] BUG: Bad rss-counter state mm:00000000b02c6ec8 type:MM_FILEPAGES val:33 [ 35.513719] BUG: Bad rss-counter state mm:00000000b02c6ec8 type:MM_ANONPAGES val:22 [ 35.683942] ================================================================== [ 35.685013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.685953] Read of size 8 at addr ffff88800e0c3968 by task sshd/219 [ 35.686921] [ 35.687144] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.688173] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.689169] Call Trace: [ 35.689517] [ 35.689896] dump_stack_lvl+0x91/0xf0 [ 35.690432] print_report+0xcc/0x620 [ 35.690929] ? __virt_addr_valid+0x102/0x340 [ 35.691639] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.692268] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.692969] kasan_report+0xbe/0xf0 [ 35.693526] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.694153] vma_interval_tree_remove+0xc75/0xec0 [ 35.694891] vma_prepare+0xc54/0x11a0 [ 35.695370] __split_vma+0x5af/0x950 [ 35.695900] ? __pfx___split_vma+0x10/0x10 [ 35.696565] ? find_held_lock+0x2c/0x110 [ 35.697093] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.697743] ? lock_is_held_type+0x9f/0x120 [ 35.698353] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.698959] ? mtree_range_walk+0x632/0x900 [ 35.699665] ? mas_walk+0x5c7/0x7c0 [ 35.700141] do_vmi_munmap+0x1f1/0x2b0 [ 35.700641] mmap_region+0x1f9/0x2660 [ 35.701245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.701755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.702587] ? __pfx_lock_acquire+0x10/0x10 [ 35.703159] ? __pfx_mmap_region+0x10/0x10 [ 35.703717] ? security_mmap_addr+0x7d/0xa0 [ 35.704418] ? get_unmapped_area+0x1f5/0x3f0 [ 35.704970] do_mmap+0x854/0xf00 [ 35.705431] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.706041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.706611] ksys_mmap_pgoff+0x3af/0x500 [ 35.707118] do_syscall_64+0x3f/0x90 [ 35.707736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.708400] RIP: 0033:0x7f6431e90d82 [ 35.708870] 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 [ 35.711316] RSP: 002b:00007ffcbfea4108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.712231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6431e90d82 [ 35.713217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64312ca000 [ 35.714072] RBP: 00007f64312ca000 R08: 0000000000000009 R09: 0000000000001000 [ 35.715056] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae7618eec0 [ 35.715932] R13: 00007ffcbfea4120 R14: 00007ffcbfea4150 R15: 00007ffcbfea44b0 [ 35.716834] [ 35.717224] [ 35.717483] Allocated by task 212: [ 35.717914] kasan_save_stack+0x22/0x50 [ 35.718427] kasan_set_track+0x25/0x30 [ 35.718922] __kasan_slab_alloc+0x59/0x70 [ 35.719443] kmem_cache_alloc+0x16b/0x370 [ 35.719979] vm_area_dup+0x20/0x160 [ 35.720433] __split_vma+0x170/0x950 [ 35.720898] split_vma+0xc6/0x110 [ 35.721338] mprotect_fixup+0x8d2/0xb30 [ 35.721842] do_mprotect_pkey+0x87e/0xd40 [ 35.722476] __x64_sys_mprotect+0x78/0xc0 [ 35.723104] do_syscall_64+0x3f/0x90 [ 35.723592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.724246] [ 35.724464] Freed by task 212: [ 35.724856] kasan_save_stack+0x22/0x50 [ 35.725364] kasan_set_track+0x25/0x30 [ 35.725853] kasan_save_free_info+0x2b/0x50 [ 35.726385] __kasan_slab_free+0x10a/0x190 [ 35.726916] kmem_cache_free+0x10d/0x4d0 [ 35.727420] rcu_core+0x8c8/0x2860 [ 35.727877] __do_softirq+0x1b7/0x7d4 [ 35.728355] [ 35.728575] Last potentially related work creation: [ 35.729161] kasan_save_stack+0x22/0x50 [ 35.729680] __kasan_record_aux_stack+0x8e/0xa0 [ 35.730251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.730895] remove_vma+0x139/0x170 [ 35.731345] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.731926] do_vmi_munmap+0x1f1/0x2b0 [ 35.732411] __vm_munmap+0x138/0x3a0 [ 35.732873] __x64_sys_munmap+0x59/0x80 [ 35.733371] do_syscall_64+0x3f/0x90 [ 35.733849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.734493] [ 35.734710] Second to last potentially related work creation: [ 35.735393] kasan_save_stack+0x22/0x50 [ 35.735926] __kasan_record_aux_stack+0x8e/0xa0 [ 35.736501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.737138] remove_vma+0x139/0x170 [ 35.737587] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.738137] do_vmi_munmap+0x1f1/0x2b0 [ 35.738631] mmap_region+0x1f9/0x2660 [ 35.739103] do_mmap+0x854/0xf00 [ 35.739541] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.740027] ksys_mmap_pgoff+0x3af/0x500 [ 35.740532] do_syscall_64+0x3f/0x90 [ 35.741005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.741648] [ 35.741861] The buggy address belongs to the object at ffff88800e0c3910 [ 35.741861] which belongs to the cache vm_area_struct of size 168 [ 35.743352] The buggy address is located 88 bytes inside of [ 35.743352] freed 168-byte region [ffff88800e0c3910, ffff88800e0c39b8) [ 35.744799] [ 35.745016] The buggy address belongs to the physical page: [ 35.745686] page:00000000d46986c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0c3 [ 35.746766] memcg:ffff88800d4d3d01 [ 35.747193] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.747851] page_type: 0xffffffff() [ 35.748301] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388140 dead000000000008 [ 35.749228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4d3d01 [ 35.750131] page dumped because: kasan: bad access detected [ 35.750797] [ 35.751018] Memory state around the buggy address: [ 35.751618] ffff88800e0c3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.752473] ffff88800e0c3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.753346] >ffff88800e0c3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.754201] ^ [ 35.755000] ffff88800e0c3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.755903] ffff88800e0c3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.756755] ================================================================== [ 35.757782] Disabling lock debugging due to kernel taint [ 37.764468] BUG: Bad rss-counter state mm:00000000be0b8de9 type:MM_FILEPAGES val:33 [ 37.765457] BUG: Bad rss-counter state mm:00000000be0b8de9 type:MM_ANONPAGES val:22 [ 38.272751] BUG: Bad rss-counter state mm:000000003d2d4502 type:MM_FILEPAGES val:33 [ 38.273943] BUG: Bad rss-counter state mm:000000003d2d4502 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34371' (ECDSA) to the list of known hosts. 2023/06/20 17:09:05 fuzzer started 2023/06/20 17:09:05 dialing manager at localhost:36067 2023/06/20 17:09:05 checking machine... 2023/06/20 17:09:05 checking revisions... [ 38.911306] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:09:05 testing simple program... [ 38.963404] cgroup: Unknown subsys name 'net' [ 39.015560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141958 RDX=1ffff11001d58f60 RSI=1ffff11001d58f5f RDI=1ffff11001d58f5f RBP=ffff88800eac7af8 RSP=ffff88800eac7a30 R8 =ffffffff8614195c R9 =ffff88800eac7ae0 R10=0000000000038001 R11=00000000000224af R12=ffff88800eac7b00 R13=ffff88800eac7ae8 R14=ffff88800eac7f40 R15=ffff88800eac7aa0 RIP=ffffffff811310d4 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 00007f66b52c5900 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=0000564c25f3e954 CR3=0000000009072000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007f6c3c56eb30 CR3=000000000f6ac000 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=87d6964f0f4ab1998a4acda8122eb9bb XMM02=2c67c8bc2e329bc3000000000011b510 XMM03=fb795ef6d65770560000000000121eb0 XMM04=9bf794fab7ea137f00000000000ae988 XMM05=dfcdbad4f1609c370000000000132db8 XMM06=84c867edd7cb633f0000000000131f90 XMM07=e042d86d42eb936e0000000000122188 XMM08=980f25fddc82f100000000000011b570 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000