syzkaller login: [ 36.828355] BUG: Bad rss-counter state mm:00000000d6b77ea6 type:MM_FILEPAGES val:33 [ 36.830123] BUG: Bad rss-counter state mm:00000000d6b77ea6 type:MM_ANONPAGES val:22 [ 37.007800] ================================================================== [ 37.008728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.009685] Read of size 8 at addr ffff8880166cb798 by task sshd/221 [ 37.010464] [ 37.010680] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.011660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.012649] Call Trace: [ 37.012973] [ 37.013268] dump_stack_lvl+0x91/0xf0 [ 37.013759] print_report+0xcc/0x620 [ 37.014259] ? __virt_addr_valid+0x102/0x340 [ 37.014815] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.015447] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.016101] kasan_report+0xbe/0xf0 [ 37.016592] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.017214] vma_interval_tree_remove+0xc75/0xec0 [ 37.017830] vma_prepare+0xc54/0x11a0 [ 37.018327] __split_vma+0x5af/0x950 [ 37.018806] ? __pfx___split_vma+0x10/0x10 [ 37.019345] ? find_held_lock+0x2c/0x110 [ 37.019878] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.020449] ? lock_is_held_type+0x9f/0x120 [ 37.020994] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.021609] ? mtree_range_walk+0x632/0x900 [ 37.022161] ? mas_walk+0x5c7/0x7c0 [ 37.022640] do_vmi_munmap+0x1f1/0x2b0 [ 37.023144] mmap_region+0x1f9/0x2660 [ 37.023656] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.024179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.024899] ? __pfx_lock_acquire+0x10/0x10 [ 37.025438] ? __pfx_mmap_region+0x10/0x10 [ 37.025975] ? security_mmap_addr+0x7d/0xa0 [ 37.026504] ? get_unmapped_area+0x1f5/0x3f0 [ 37.027059] do_mmap+0x854/0xf00 [ 37.027503] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.028018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.028589] ksys_mmap_pgoff+0x3af/0x500 [ 37.029099] do_syscall_64+0x3f/0x90 [ 37.029587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.030249] RIP: 0033:0x7f778c2a4d82 [ 37.030712] 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 [ 37.032899] RSP: 002b:00007ffd822c0da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.033825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f778c2a4d82 [ 37.034685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f778b6de000 [ 37.035549] RBP: 00007f778b6de000 R08: 0000000000000009 R09: 0000000000001000 [ 37.036426] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c0cd8fec0 [ 37.037293] R13: 00007ffd822c0dc0 R14: 00007ffd822c0df0 R15: 00007ffd822c1150 [ 37.038163] [ 37.038459] [ 37.038677] Allocated by task 214: [ 37.039111] kasan_save_stack+0x22/0x50 [ 37.039630] kasan_set_track+0x25/0x30 [ 37.040136] __kasan_slab_alloc+0x59/0x70 [ 37.040660] kmem_cache_alloc+0x16b/0x370 [ 37.041176] vm_area_dup+0x20/0x160 [ 37.041638] __split_vma+0x170/0x950 [ 37.042110] split_vma+0xc6/0x110 [ 37.042553] mprotect_fixup+0x8d2/0xb30 [ 37.043060] do_mprotect_pkey+0x87e/0xd40 [ 37.043607] __x64_sys_mprotect+0x78/0xc0 [ 37.044144] do_syscall_64+0x3f/0x90 [ 37.044623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.045287] [ 37.045531] Freed by task 203: [ 37.045965] kasan_save_stack+0x22/0x50 [ 37.046531] kasan_set_track+0x25/0x30 [ 37.047088] kasan_save_free_info+0x2b/0x50 [ 37.047696] __kasan_slab_free+0x10a/0x190 [ 37.048288] kmem_cache_free+0x10d/0x4d0 [ 37.048861] rcu_core+0x8c8/0x2860 [ 37.049354] __do_softirq+0x1b7/0x7d4 [ 37.049891] [ 37.050132] Last potentially related work creation: [ 37.050789] kasan_save_stack+0x22/0x50 [ 37.051355] __kasan_record_aux_stack+0x8e/0xa0 [ 37.052017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.052736] remove_vma+0x139/0x170 [ 37.053239] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.053863] do_vmi_munmap+0x1f1/0x2b0 [ 37.054393] __vm_munmap+0x138/0x3a0 [ 37.054862] __x64_sys_munmap+0x59/0x80 [ 37.055360] do_syscall_64+0x3f/0x90 [ 37.055865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.056514] [ 37.056733] Second to last potentially related work creation: [ 37.057434] kasan_save_stack+0x22/0x50 [ 37.057941] __kasan_record_aux_stack+0x8e/0xa0 [ 37.058528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.059179] remove_vma+0x139/0x170 [ 37.059655] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.060225] do_vmi_munmap+0x1f1/0x2b0 [ 37.060718] mmap_region+0x1f9/0x2660 [ 37.061196] do_mmap+0x854/0xf00 [ 37.061628] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.062120] ksys_mmap_pgoff+0x3af/0x500 [ 37.062627] do_syscall_64+0x3f/0x90 [ 37.063100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.063760] [ 37.063974] The buggy address belongs to the object at ffff8880166cb740 [ 37.063974] which belongs to the cache vm_area_struct of size 168 [ 37.065482] The buggy address is located 88 bytes inside of [ 37.065482] freed 168-byte region [ffff8880166cb740, ffff8880166cb7e8) [ 37.066931] [ 37.067143] The buggy address belongs to the physical page: [ 37.067806] page:0000000018c893b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166cb [ 37.068911] memcg:ffff8880168e0c01 [ 37.069340] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.069988] page_type: 0xffffffff() [ 37.070434] raw: 0100000000000200 ffff88800879fc80 ffffea000059b0c0 dead000000000008 [ 37.071347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168e0c01 [ 37.072275] page dumped because: kasan: bad access detected [ 37.072945] [ 37.073160] Memory state around the buggy address: [ 37.073746] ffff8880166cb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.074618] ffff8880166cb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.075470] >ffff8880166cb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.076330] ^ [ 37.076822] ffff8880166cb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.077673] ffff8880166cb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.078520] ================================================================== [ 37.079497] Disabling lock debugging due to kernel taint [ 39.313319] BUG: Bad rss-counter state mm:00000000dd7b247a type:MM_FILEPAGES val:33 [ 39.314599] BUG: Bad rss-counter state mm:00000000dd7b247a type:MM_ANONPAGES val:22 [ 39.727305] BUG: Bad rss-counter state mm:000000003ece0d4c type:MM_FILEPAGES val:33 [ 39.728261] BUG: Bad rss-counter state mm:000000003ece0d4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56541' (ECDSA) to the list of known hosts. 2023/06/19 11:43:12 fuzzer started 2023/06/19 11:43:12 dialing manager at localhost:44161 2023/06/19 11:43:12 checking machine... 2023/06/19 11:43:12 checking revisions... [ 40.414121] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:43:13 testing simple program... [ 40.467592] cgroup: Unknown subsys name 'net' [ 40.522482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:06 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffc253bbe28 CR3=000000001a812000 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=2032313a33343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33343a3131203931 XMM08=6d65747379733d747865746e6f637320 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880090b8001 RBX=ffff8880090b7d18 RCX=0000000000000001 RDX=ffff8880090b7d20 RSI=ffff8880090b7cf0 RDI=ffff8880090b7858 RBP=ffff8880090b0000 RSP=ffff8880090b77d8 R8 =0000000000000001 R9 =ffff8880090b7888 R10=0000000000038001 R11=000000000001d00c R12=ffff8880090b78a8 R13=ffff8880090b7890 R14=ffff8880090b7cf0 R15=ffff8880090b7848 RIP=ffffffff8113128d RFL=00000287 [--S--PC] 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 00007f7bab48d900 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=00007ffdb32bf000 CR3=000000000dd42000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000