syzkaller login: [ 53.772684] BUG: Bad rss-counter state mm:0000000038057901 type:MM_FILEPAGES val:33 [ 53.773896] BUG: Bad rss-counter state mm:0000000038057901 type:MM_ANONPAGES val:22 [ 53.924648] ================================================================== [ 53.925572] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.926528] Read of size 8 at addr ffff88800ecffa50 by task sshd/220 [ 53.927416] [ 53.927634] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.928505] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.929532] Call Trace: [ 53.929859] [ 53.930142] dump_stack_lvl+0x91/0xf0 [ 53.930634] print_report+0xcc/0x620 [ 53.931152] ? __virt_addr_valid+0x102/0x340 [ 53.931715] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.932336] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.932964] kasan_report+0xbe/0xf0 [ 53.933447] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.934085] vma_interval_tree_remove+0xc75/0xec0 [ 53.934695] vma_prepare+0xc54/0x11a0 [ 53.935203] __split_vma+0x5af/0x950 [ 53.935685] ? __pfx___split_vma+0x10/0x10 [ 53.936223] ? find_held_lock+0x2c/0x110 [ 53.936758] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.937335] ? lock_is_held_type+0x9f/0x120 [ 53.937879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.938489] ? mtree_range_walk+0x632/0x900 [ 53.939052] ? mas_walk+0x5c7/0x7c0 [ 53.939573] do_vmi_munmap+0x1f1/0x2b0 [ 53.940099] mmap_region+0x1f9/0x2660 [ 53.940595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.941112] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.941838] ? __pfx_lock_acquire+0x10/0x10 [ 53.942379] ? __pfx_mmap_region+0x10/0x10 [ 53.942915] ? security_mmap_addr+0x7d/0xa0 [ 53.943481] ? get_unmapped_area+0x1f5/0x3f0 [ 53.944034] do_mmap+0x854/0xf00 [ 53.944476] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.944968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.945532] ksys_mmap_pgoff+0x3af/0x500 [ 53.946054] do_syscall_64+0x3f/0x90 [ 53.946545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.947212] RIP: 0033:0x7ff46e611d82 [ 53.947678] 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 [ 53.949817] RSP: 002b:00007fff6ee6e3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.950719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff46e611d82 [ 53.951588] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff46da4b000 [ 53.952431] RBP: 00007ff46da4b000 R08: 0000000000000009 R09: 0000000000001000 [ 53.953275] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565319cdaec0 [ 53.954127] R13: 00007fff6ee6e3d0 R14: 00007fff6ee6e400 R15: 00007fff6ee6e760 [ 53.954990] [ 53.955293] [ 53.955512] Allocated by task 213: [ 53.955953] kasan_save_stack+0x22/0x50 [ 53.956461] kasan_set_track+0x25/0x30 [ 53.956955] __kasan_slab_alloc+0x59/0x70 [ 53.957489] kmem_cache_alloc+0x16b/0x370 [ 53.958010] vm_area_dup+0x20/0x160 [ 53.958472] __split_vma+0x170/0x950 [ 53.958951] split_vma+0xc6/0x110 [ 53.959419] mprotect_fixup+0x8d2/0xb30 [ 53.959921] do_mprotect_pkey+0x87e/0xd40 [ 53.960449] __x64_sys_mprotect+0x78/0xc0 [ 53.960974] do_syscall_64+0x3f/0x90 [ 53.961448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.962093] [ 53.962308] Freed by task 213: [ 53.962697] kasan_save_stack+0x22/0x50 [ 53.963216] kasan_set_track+0x25/0x30 [ 53.963709] kasan_save_free_info+0x2b/0x50 [ 53.964249] __kasan_slab_free+0x10a/0x190 [ 53.964783] kmem_cache_free+0x10d/0x4d0 [ 53.965293] rcu_core+0x8c8/0x2860 [ 53.965745] __do_softirq+0x1b7/0x7d4 [ 53.966225] [ 53.966444] Last potentially related work creation: [ 53.967039] kasan_save_stack+0x22/0x50 [ 53.967544] __kasan_record_aux_stack+0x8e/0xa0 [ 53.968113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.968760] remove_vma+0x139/0x170 [ 53.969217] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.969776] do_vmi_munmap+0x1f1/0x2b0 [ 53.970267] __vm_munmap+0x138/0x3a0 [ 53.970736] __x64_sys_munmap+0x59/0x80 [ 53.971261] do_syscall_64+0x3f/0x90 [ 53.971742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.972386] [ 53.972600] The buggy address belongs to the object at ffff88800ecff9f8 [ 53.972600] which belongs to the cache vm_area_struct of size 168 [ 53.974090] The buggy address is located 88 bytes inside of [ 53.974090] freed 168-byte region [ffff88800ecff9f8, ffff88800ecffaa0) [ 53.975508] [ 53.975727] The buggy address belongs to the physical page: [ 53.976390] page:00000000c2234e23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecff [ 53.977470] memcg:ffff88801026c601 [ 53.977899] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.978548] page_type: 0xffffffff() [ 53.979018] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 53.979942] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801026c601 [ 53.980851] page dumped because: kasan: bad access detected [ 53.981519] [ 53.981737] Memory state around the buggy address: [ 53.982315] ffff88800ecff900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.983172] ffff88800ecff980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 53.984025] >ffff88800ecffa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.984878] ^ [ 53.985577] ffff88800ecffa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 53.986442] ffff88800ecffb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.987540] ================================================================== [ 53.988833] Disabling lock debugging due to kernel taint [ 56.001281] BUG: Bad rss-counter state mm:0000000011c83344 type:MM_FILEPAGES val:33 [ 56.002346] BUG: Bad rss-counter state mm:0000000011c83344 type:MM_ANONPAGES val:22 [ 56.524545] BUG: Bad rss-counter state mm:0000000057f23fd2 type:MM_FILEPAGES val:33 [ 56.525539] BUG: Bad rss-counter state mm:0000000057f23fd2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55727' (ECDSA) to the list of known hosts. 2023/06/19 20:57:22 fuzzer started 2023/06/19 20:57:22 dialing manager at localhost:44161 2023/06/19 20:57:22 checking machine... 2023/06/19 20:57:22 checking revisions... [ 57.257299] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:22 testing simple program... [ 57.305145] cgroup: Unknown subsys name 'net' [ 57.343274] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:56:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888015ac7700 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000016 [----AP-] 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 00007f3ad6599900 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=00007f3ad6b4e650 CR3=0000000019b2e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81807eba RDX=000000000000807e RSI=000000000000807e RDI=ffffffff86507db8 RBP=ffff8880147c7340 RSP=ffff8880147c7278 R8 =0000000000000000 R9 =ffff8880147c7328 R10=0000000000038001 R11=0000000000020de7 R12=ffff8880147c7348 R13=ffff8880147c7330 R14=ffff8880147c7329 R15=ffff8880147c72e8 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007fd2aa0d0900 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=00007fd2a94fad40 CR3=000000000d68c000 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=b751c0ba6260fba47043de72afbeabfa XMM02=eff9b2d0a8fce9cb000000000011f5d8 XMM03=2c67c8bc2e329bc3000000000011f700 XMM04=955b3991b0c008af00000000000ae988 XMM05=d150f7970c2d9df40000000000134388 XMM06=19e9129bd510f2350000000000132eb0 XMM07=fb795ef6d657705600000000001233a8 XMM08=2c67c8bc2e329bc3000000000011f700 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000