syzkaller login: [ 38.732262] BUG: Bad rss-counter state mm:00000000e3b094a7 type:MM_FILEPAGES val:33 [ 38.733447] BUG: Bad rss-counter state mm:00000000e3b094a7 type:MM_ANONPAGES val:22 [ 38.885338] ================================================================== [ 38.886380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.887339] Read of size 8 at addr ffff88800f15b968 by task sshd/220 [ 38.888211] [ 38.888433] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.889332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.890340] Call Trace: [ 38.890661] [ 38.890952] dump_stack_lvl+0x91/0xf0 [ 38.891456] print_report+0xcc/0x620 [ 38.891964] ? __virt_addr_valid+0x102/0x340 [ 38.892525] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893162] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893790] kasan_report+0xbe/0xf0 [ 38.894278] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894903] vma_interval_tree_remove+0xc75/0xec0 [ 38.895510] vma_prepare+0xc54/0x11a0 [ 38.896002] __split_vma+0x5af/0x950 [ 38.896472] ? __pfx___split_vma+0x10/0x10 [ 38.897009] ? find_held_lock+0x2c/0x110 [ 38.897560] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.898127] ? lock_is_held_type+0x9f/0x120 [ 38.898673] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.899282] ? mtree_range_walk+0x632/0x900 [ 38.899846] ? mas_walk+0x5c7/0x7c0 [ 38.900326] do_vmi_munmap+0x1f1/0x2b0 [ 38.900822] mmap_region+0x1f9/0x2660 [ 38.901318] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.901835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.902546] ? __pfx_lock_acquire+0x10/0x10 [ 38.903085] ? __pfx_mmap_region+0x10/0x10 [ 38.903625] ? security_mmap_addr+0x7d/0xa0 [ 38.904158] ? get_unmapped_area+0x1f5/0x3f0 [ 38.904720] do_mmap+0x854/0xf00 [ 38.905177] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.905691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.906274] ksys_mmap_pgoff+0x3af/0x500 [ 38.906799] do_syscall_64+0x3f/0x90 [ 38.907293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907940] RIP: 0033:0x7f728dde3d82 [ 38.908413] 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 [ 38.910580] RSP: 002b:00007ffc1520df98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.911485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f728dde3d82 [ 38.912356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f728d21d000 [ 38.913220] RBP: 00007f728d21d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.914069] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d05a7b6f70 [ 38.914923] R13: 00007ffc1520dfb0 R14: 00007ffc1520dfe0 R15: 00007ffc1520e340 [ 38.915771] [ 38.916064] [ 38.916281] Allocated by task 213: [ 38.916710] kasan_save_stack+0x22/0x50 [ 38.917227] kasan_set_track+0x25/0x30 [ 38.917725] __kasan_slab_alloc+0x59/0x70 [ 38.918247] kmem_cache_alloc+0x16b/0x370 [ 38.918763] vm_area_dup+0x20/0x160 [ 38.919213] __split_vma+0x170/0x950 [ 38.919690] split_vma+0xc6/0x110 [ 38.920130] mprotect_fixup+0x8d2/0xb30 [ 38.920637] do_mprotect_pkey+0x87e/0xd40 [ 38.921169] __x64_sys_mprotect+0x78/0xc0 [ 38.921702] do_syscall_64+0x3f/0x90 [ 38.922176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922817] [ 38.923032] Freed by task 213: [ 38.923429] kasan_save_stack+0x22/0x50 [ 38.923940] kasan_set_track+0x25/0x30 [ 38.924433] kasan_save_free_info+0x2b/0x50 [ 38.924975] __kasan_slab_free+0x10a/0x190 [ 38.925522] kmem_cache_free+0x10d/0x4d0 [ 38.926024] rcu_core+0x8c8/0x2860 [ 38.926473] __do_softirq+0x1b7/0x7d4 [ 38.926957] [ 38.927176] Last potentially related work creation: [ 38.927764] kasan_save_stack+0x22/0x50 [ 38.928268] __kasan_record_aux_stack+0x8e/0xa0 [ 38.928847] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.929499] remove_vma+0x139/0x170 [ 38.929950] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.930508] do_vmi_munmap+0x1f1/0x2b0 [ 38.930994] __vm_munmap+0x138/0x3a0 [ 38.931459] __x64_sys_munmap+0x59/0x80 [ 38.931954] do_syscall_64+0x3f/0x90 [ 38.932428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933112] [ 38.933338] The buggy address belongs to the object at ffff88800f15b910 [ 38.933338] which belongs to the cache vm_area_struct of size 168 [ 38.934808] The buggy address is located 88 bytes inside of [ 38.934808] freed 168-byte region [ffff88800f15b910, ffff88800f15b9b8) [ 38.936223] [ 38.936445] The buggy address belongs to the physical page: [ 38.937119] page:000000003c7243ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf15b [ 38.938206] memcg:ffff888009095e01 [ 38.938630] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.939274] page_type: 0xffffffff() [ 38.939728] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.940644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009095e01 [ 38.941557] page dumped because: kasan: bad access detected [ 38.942212] [ 38.942427] Memory state around the buggy address: [ 38.943008] ffff88800f15b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.943863] ffff88800f15b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.944713] >ffff88800f15b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.945588] ^ [ 38.946371] ffff88800f15b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.947230] ffff88800f15ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.948082] ================================================================== [ 38.949087] Disabling lock debugging due to kernel taint [ 40.782993] BUG: Bad rss-counter state mm:0000000047a8020f type:MM_FILEPAGES val:33 [ 40.784013] BUG: Bad rss-counter state mm:0000000047a8020f type:MM_ANONPAGES val:22 [ 41.209557] BUG: Bad rss-counter state mm:0000000021e695ee type:MM_FILEPAGES val:33 [ 41.210990] BUG: Bad rss-counter state mm:0000000021e695ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13674' (ECDSA) to the list of known hosts. 2023/06/20 20:33:04 fuzzer started 2023/06/20 20:33:05 dialing manager at localhost:36067 2023/06/20 20:33:05 checking machine... 2023/06/20 20:33:05 checking revisions... [ 41.950668] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:33:05 testing simple program... [ 42.014290] cgroup: Unknown subsys name 'net' [ 42.064681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:33:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880167975f0 RCX=0000000000000001 RDX=1ffff11002cf2ebe RSI=ffffffff8180803b RDI=ffff8880167975fc RBP=0000000000000003 RSP=ffff888016797508 R8 =0000000000000001 R9 =ffff888016797568 R10=0000000000038001 R11=0000000000020de5 R12=ffff8880167975f0 R13=0000000000000000 R14=ffff88801471d1c0 R15=0000000000000d40 RIP=ffffffff813ad51f 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 00007fbc908c1700 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=00007fc7e9d22890 CR3=000000000cbbc000 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=2034303a33333a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33333a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001db2fac RCX=0000000000000000 RDX=ffff888019b38000 RSI=ffffffff817187d0 RDI=ffff8880100f3240 RBP=ffff8880100f3240 RSP=ffff88800ed97d28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=800000001b4be005 R13=ffffffff852c61f8 R14=0000000019e98007 R15=000000000c567067 RIP=ffffffff84535b73 RFL=00000283 [--S---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6f2e8d9900 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=00007ffc3ef450dc CR3=000000000e740000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=072171236933d5307f529a5f0d0c605a XMM04=fbd7fb0cf25ad0a161581935e2ac2d73 XMM05=00000000000000000000000000000000 XMM06=0721710c6933d030615219350d0c2d5a XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000