syzkaller login: [ 28.751799] BUG: Bad rss-counter state mm:00000000e6e6d369 type:MM_FILEPAGES val:33 [ 28.752818] BUG: Bad rss-counter state mm:00000000e6e6d369 type:MM_ANONPAGES val:22 [ 28.927520] ================================================================== [ 28.928431] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.929375] Read of size 8 at addr ffff88800e4cc310 by task sshd/219 [ 28.930169] [ 28.930395] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.931354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.932332] Call Trace: [ 28.932647] [ 28.932954] dump_stack_lvl+0x91/0xf0 [ 28.933456] print_report+0xcc/0x620 [ 28.933960] ? __virt_addr_valid+0x102/0x340 [ 28.934509] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935127] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935738] kasan_report+0xbe/0xf0 [ 28.936209] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.936824] vma_interval_tree_remove+0xc75/0xec0 [ 28.937420] vma_prepare+0xc54/0x11a0 [ 28.937904] __split_vma+0x5af/0x950 [ 28.938377] ? __pfx___split_vma+0x10/0x10 [ 28.938910] ? find_held_lock+0x2c/0x110 [ 28.939429] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.939991] ? lock_is_held_type+0x9f/0x120 [ 28.940545] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.941148] ? mtree_range_walk+0x632/0x900 [ 28.941722] ? mas_walk+0x5c7/0x7c0 [ 28.942195] do_vmi_munmap+0x1f1/0x2b0 [ 28.942697] mmap_region+0x1f9/0x2660 [ 28.943185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.943701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.944408] ? __pfx_lock_acquire+0x10/0x10 [ 28.944934] ? __pfx_mmap_region+0x10/0x10 [ 28.945457] ? security_mmap_addr+0x7d/0xa0 [ 28.945995] ? get_unmapped_area+0x1f5/0x3f0 [ 28.946547] do_mmap+0x854/0xf00 [ 28.946991] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.947496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.948052] ksys_mmap_pgoff+0x3af/0x500 [ 28.948562] do_syscall_64+0x3f/0x90 [ 28.949035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.949701] RIP: 0033:0x7f6ce774bd82 [ 28.950153] 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 [ 28.952261] RSP: 002b:00007fffbb4ed768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.953169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ce774bd82 [ 28.954023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ce6b85000 [ 28.954872] RBP: 00007f6ce6b85000 R08: 0000000000000009 R09: 0000000000001000 [ 28.955721] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1ce4bbec0 [ 28.956569] R13: 00007fffbb4ed780 R14: 00007fffbb4ed7b0 R15: 00007fffbb4edb10 [ 28.957425] [ 28.957723] [ 28.957941] Allocated by task 211: [ 28.958382] kasan_save_stack+0x22/0x50 [ 28.958886] kasan_set_track+0x25/0x30 [ 28.959373] __kasan_slab_alloc+0x59/0x70 [ 28.959891] kmem_cache_alloc+0x16b/0x370 [ 28.960408] vm_area_dup+0x20/0x160 [ 28.960859] __split_vma+0x170/0x950 [ 28.961337] split_vma+0xc6/0x110 [ 28.961805] mprotect_fixup+0x8d2/0xb30 [ 28.962332] do_mprotect_pkey+0x87e/0xd40 [ 28.962880] __x64_sys_mprotect+0x78/0xc0 [ 28.963426] do_syscall_64+0x3f/0x90 [ 28.963924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.964593] [ 28.964817] Freed by task 211: [ 28.965225] kasan_save_stack+0x22/0x50 [ 28.965753] kasan_set_track+0x25/0x30 [ 28.966270] kasan_save_free_info+0x2b/0x50 [ 28.966829] __kasan_slab_free+0x10a/0x190 [ 28.967388] kmem_cache_free+0x10d/0x4d0 [ 28.967919] rcu_core+0x8c8/0x2860 [ 28.968384] __do_softirq+0x1b7/0x7d4 [ 28.968884] [ 28.969105] Last potentially related work creation: [ 28.969736] kasan_save_stack+0x22/0x50 [ 28.970258] __kasan_record_aux_stack+0x8e/0xa0 [ 28.970855] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.971533] remove_vma+0x139/0x170 [ 28.972001] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.972578] do_vmi_munmap+0x1f1/0x2b0 [ 28.973089] __vm_munmap+0x138/0x3a0 [ 28.973575] __x64_sys_munmap+0x59/0x80 [ 28.974097] do_syscall_64+0x3f/0x90 [ 28.974592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.975272] [ 28.975500] Second to last potentially related work creation: [ 28.976216] kasan_save_stack+0x22/0x50 [ 28.976740] __kasan_record_aux_stack+0x8e/0xa0 [ 28.977341] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.978005] remove_vma+0x139/0x170 [ 28.978479] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.979069] do_vmi_munmap+0x1f1/0x2b0 [ 28.979579] mmap_region+0x1f9/0x2660 [ 28.980079] do_mmap+0x854/0xf00 [ 28.980536] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.981044] ksys_mmap_pgoff+0x3af/0x500 [ 28.981583] do_syscall_64+0x3f/0x90 [ 28.982077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.982732] [ 28.982953] The buggy address belongs to the object at ffff88800e4cc2b8 [ 28.982953] which belongs to the cache vm_area_struct of size 168 [ 28.984488] The buggy address is located 88 bytes inside of [ 28.984488] freed 168-byte region [ffff88800e4cc2b8, ffff88800e4cc360) [ 28.985964] [ 28.986187] The buggy address belongs to the physical page: [ 28.986880] page:00000000ad1db2be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4cc [ 28.987995] memcg:ffff88800e1f1f01 [ 28.988444] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.989110] page_type: 0xffffffff() [ 28.989575] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393d00 dead000000000002 [ 28.990635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1f1f01 [ 28.991603] page dumped because: kasan: bad access detected [ 28.992293] [ 28.992523] Memory state around the buggy address: [ 28.993126] ffff88800e4cc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.994043] ffff88800e4cc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.994939] >ffff88800e4cc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.995824] ^ [ 28.996306] ffff88800e4cc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.997197] ffff88800e4cc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.998125] ================================================================== [ 28.999162] Disabling lock debugging due to kernel taint [ 30.910372] BUG: Bad rss-counter state mm:00000000a0abbf9d type:MM_FILEPAGES val:33 [ 30.911713] BUG: Bad rss-counter state mm:00000000a0abbf9d type:MM_ANONPAGES val:22 [ 31.381612] BUG: Bad rss-counter state mm:000000009ed4a488 type:MM_FILEPAGES val:33 [ 31.382666] BUG: Bad rss-counter state mm:000000009ed4a488 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55127' (ECDSA) to the list of known hosts. 2023/06/20 12:37:15 fuzzer started 2023/06/20 12:37:15 dialing manager at localhost:36067 2023/06/20 12:37:15 checking machine... 2023/06/20 12:37:15 checking revisions... [ 32.079518] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:37:15 testing simple program... [ 32.134764] cgroup: Unknown subsys name 'net' [ 32.194263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:37:15 Registers: info registers vcpu 0 RAX=0000000080000102 RBX=ffffffff86607973 RCX=ffffffff813a0add RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce09a00 R8 =0000000000000006 R9 =ffffffff86607973 R10=ffffffffffffffff R11=00000000000b54e7 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800db1a680 RIP=ffffffff814c0261 RFL=00000206 [-----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=00005600b1dd9290 CR3=000000000c94e000 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=2034313a37333a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a37333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c6a2 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff11002853e4c RSI=ffffffff8180c6a2 RDI=ffff88801429f2d0 RBP=ffff88801429f2a0 RSP=ffff88801429f200 R8 =ffffffff860d825a R9 =ffff88801429f248 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801429f2d0 R13=0000000000000000 R14=ffff8880142a0000 R15=0000000000092cc0 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007f006e506900 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=00007f071e543650 CR3=000000001364c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=1b18bde5eab41a3600000000000ae988 XMM05=79c069e8b95ceec90000000000133d28 XMM06=806171799158d9670000000000132b18 XMM07=fb795ef6d657705600000000001212a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000