syzkaller login: [ 55.872755] BUG: Bad rss-counter state mm:00000000648e96e3 type:MM_FILEPAGES val:33 [ 55.874103] BUG: Bad rss-counter state mm:00000000648e96e3 type:MM_ANONPAGES val:22 [ 56.046311] ================================================================== [ 56.047317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.048364] Read of size 8 at addr ffff88800dace798 by task sshd/218 [ 56.049329] [ 56.049572] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.050522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.051613] Call Trace: [ 56.051968] [ 56.052284] dump_stack_lvl+0x91/0xf0 [ 56.052856] print_report+0xcc/0x620 [ 56.053399] ? __virt_addr_valid+0x102/0x340 [ 56.054014] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.054709] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.055392] kasan_report+0xbe/0xf0 [ 56.055922] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.056620] vma_interval_tree_remove+0xc75/0xec0 [ 56.057300] vma_prepare+0xc54/0x11a0 [ 56.057832] __split_vma+0x5af/0x950 [ 56.058350] ? __pfx___split_vma+0x10/0x10 [ 56.058930] ? find_held_lock+0x2c/0x110 [ 56.059514] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.060135] ? lock_is_held_type+0x9f/0x120 [ 56.060750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.061418] ? mtree_range_walk+0x632/0x900 [ 56.062020] ? mas_walk+0x5c7/0x7c0 [ 56.062543] do_vmi_munmap+0x1f1/0x2b0 [ 56.063082] mmap_region+0x1f9/0x2660 [ 56.063622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.064197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.065014] ? __pfx_lock_acquire+0x10/0x10 [ 56.065623] ? __pfx_mmap_region+0x10/0x10 [ 56.066215] ? security_mmap_addr+0x7d/0xa0 [ 56.066815] ? get_unmapped_area+0x1f5/0x3f0 [ 56.067434] do_mmap+0x854/0xf00 [ 56.067925] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.068482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.069131] ksys_mmap_pgoff+0x3af/0x500 [ 56.069701] do_syscall_64+0x3f/0x90 [ 56.070242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.070970] RIP: 0033:0x7fec2ed09d82 [ 56.071488] 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 [ 56.073887] RSP: 002b:00007ffcad274f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.074911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec2ed09d82 [ 56.075875] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec2e143000 [ 56.076846] RBP: 00007fec2e143000 R08: 0000000000000009 R09: 0000000000001000 [ 56.077791] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca39a5af60 [ 56.078745] R13: 00007ffcad274f20 R14: 00007ffcad274f50 R15: 00007ffcad2752b0 [ 56.079729] [ 56.080051] [ 56.080288] Allocated by task 211: [ 56.080778] kasan_save_stack+0x22/0x50 [ 56.081348] kasan_set_track+0x25/0x30 [ 56.081909] __kasan_slab_alloc+0x59/0x70 [ 56.082502] kmem_cache_alloc+0x16b/0x370 [ 56.083077] vm_area_dup+0x20/0x160 [ 56.083591] __split_vma+0x170/0x950 [ 56.084108] split_vma+0xc6/0x110 [ 56.084599] mprotect_fixup+0x8d2/0xb30 [ 56.085172] do_mprotect_pkey+0x87e/0xd40 [ 56.085767] __x64_sys_mprotect+0x78/0xc0 [ 56.086358] do_syscall_64+0x3f/0x90 [ 56.086886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.087600] [ 56.087838] Freed by task 211: [ 56.088275] kasan_save_stack+0x22/0x50 [ 56.088834] kasan_set_track+0x25/0x30 [ 56.089385] kasan_save_free_info+0x2b/0x50 [ 56.089975] __kasan_slab_free+0x10a/0x190 [ 56.090569] kmem_cache_free+0x10d/0x4d0 [ 56.091127] rcu_core+0x8c8/0x2860 [ 56.091627] __do_softirq+0x1b7/0x7d4 [ 56.092160] [ 56.092400] Last potentially related work creation: [ 56.093067] kasan_save_stack+0x22/0x50 [ 56.093627] __kasan_record_aux_stack+0x8e/0xa0 [ 56.094267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.094980] remove_vma+0x139/0x170 [ 56.095485] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.096104] do_vmi_munmap+0x1f1/0x2b0 [ 56.096653] __vm_munmap+0x138/0x3a0 [ 56.097171] __x64_sys_munmap+0x59/0x80 [ 56.097726] do_syscall_64+0x3f/0x90 [ 56.098245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.098950] [ 56.099190] The buggy address belongs to the object at ffff88800dace740 [ 56.099190] which belongs to the cache vm_area_struct of size 168 [ 56.100815] The buggy address is located 88 bytes inside of [ 56.100815] freed 168-byte region [ffff88800dace740, ffff88800dace7e8) [ 56.102365] [ 56.102607] The buggy address belongs to the physical page: [ 56.103334] page:000000007f987a6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdace [ 56.104522] memcg:ffff888015891801 [ 56.104993] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.105708] page_type: 0xffffffff() [ 56.106211] raw: 0100000000000200 ffff88800879fc80 ffffea000037bb80 dead000000000008 [ 56.107222] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015891801 [ 56.108212] page dumped because: kasan: bad access detected [ 56.108953] [ 56.109191] Memory state around the buggy address: [ 56.109828] ffff88800dace680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.110769] ffff88800dace700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 56.111708] >ffff88800dace780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 56.112655] ^ [ 56.113195] ffff88800dace800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 56.114127] ffff88800dace880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 56.115053] ================================================================== [ 56.116233] Disabling lock debugging due to kernel taint [ 58.212440] BUG: Bad rss-counter state mm:0000000073e262a7 type:MM_FILEPAGES val:33 [ 58.213507] BUG: Bad rss-counter state mm:0000000073e262a7 type:MM_ANONPAGES val:22 [ 58.742187] BUG: Bad rss-counter state mm:0000000041fc2509 type:MM_FILEPAGES val:33 [ 58.743180] BUG: Bad rss-counter state mm:0000000041fc2509 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62887' (ECDSA) to the list of known hosts. 2023/06/20 03:13:38 fuzzer started 2023/06/20 03:13:38 dialing manager at localhost:44161 2023/06/20 03:13:38 checking machine... 2023/06/20 03:13:38 checking revisions... [ 59.427307] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:13:38 testing simple program... [ 59.481207] cgroup: Unknown subsys name 'net' [ 59.527821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:13:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016777438 RCX=0000000000000001 RDX=1ffff11002ceee9b RSI=ffffffff83868f58 RDI=ffff888016777444 RBP=ffff8880167774d8 RSP=ffff888016777350 R8 =0000000000000001 R9 =ffff8880167773b0 R10=0000000000038001 R11=000000000008b5c6 R12=ffff888016777438 R13=0000000000000000 R14=ffff888015ab51c0 R15=0000000000002000 RIP=ffffffff813ad4f7 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 00007f204c474900 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=00007ffc08d94000 CR3=000000000d8ec000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100d9e13a4 RCX=ffffffff85d3d010 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09d10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8eed 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 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=00007f12b8dd4020 CR3=000000000e81c000 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=2037333a33313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000