syzkaller login: [ 39.845387] BUG: Bad rss-counter state mm:00000000eaa4b644 type:MM_FILEPAGES val:33 [ 39.846670] BUG: Bad rss-counter state mm:00000000eaa4b644 type:MM_ANONPAGES val:22 [ 40.017734] ================================================================== [ 40.018938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.020177] Read of size 8 at addr ffff888015ef1058 by task sshd/219 [ 40.021347] [ 40.021633] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.022765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.024091] Call Trace: [ 40.024510] [ 40.024883] dump_stack_lvl+0x91/0xf0 [ 40.025523] print_report+0xcc/0x620 [ 40.026161] ? __virt_addr_valid+0x102/0x340 [ 40.026879] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.027720] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.028469] kasan_report+0xbe/0xf0 [ 40.029013] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.029727] vma_interval_tree_remove+0xc75/0xec0 [ 40.030419] vma_prepare+0xc54/0x11a0 [ 40.030976] __split_vma+0x5af/0x950 [ 40.031536] ? __pfx___split_vma+0x10/0x10 [ 40.032149] ? find_held_lock+0x2c/0x110 [ 40.032745] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.033391] ? lock_is_held_type+0x9f/0x120 [ 40.034011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.034712] ? mtree_range_walk+0x632/0x900 [ 40.035362] ? mas_walk+0x5c7/0x7c0 [ 40.035907] do_vmi_munmap+0x1f1/0x2b0 [ 40.036471] mmap_region+0x1f9/0x2660 [ 40.037028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.037620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.038440] ? __pfx_lock_acquire+0x10/0x10 [ 40.039052] ? __pfx_mmap_region+0x10/0x10 [ 40.039699] ? security_mmap_addr+0x7d/0xa0 [ 40.040307] ? get_unmapped_area+0x1f5/0x3f0 [ 40.040934] do_mmap+0x854/0xf00 [ 40.041435] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.042000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.042642] ksys_mmap_pgoff+0x3af/0x500 [ 40.043229] do_syscall_64+0x3f/0x90 [ 40.043777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.044516] RIP: 0033:0x7f6b480cbd82 [ 40.045032] 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 [ 40.047482] RSP: 002b:00007ffe92459708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.048512] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b480cbd82 [ 40.049486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b47505000 [ 40.050450] RBP: 00007f6b47505000 R08: 0000000000000009 R09: 0000000000001000 [ 40.051438] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ceede28f70 [ 40.052383] R13: 00007ffe92459720 R14: 00007ffe92459750 R15: 00007ffe92459ab0 [ 40.053310] [ 40.053626] [ 40.053857] Allocated by task 212: [ 40.054325] kasan_save_stack+0x22/0x50 [ 40.054868] kasan_set_track+0x25/0x30 [ 40.055414] __kasan_slab_alloc+0x59/0x70 [ 40.055985] kmem_cache_alloc+0x16b/0x370 [ 40.056550] vm_area_dup+0x20/0x160 [ 40.057042] __split_vma+0x170/0x950 [ 40.057558] split_vma+0xc6/0x110 [ 40.058043] mprotect_fixup+0x8d2/0xb30 [ 40.058593] do_mprotect_pkey+0x87e/0xd40 [ 40.059156] __x64_sys_mprotect+0x78/0xc0 [ 40.059739] do_syscall_64+0x3f/0x90 [ 40.060265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.060964] [ 40.061195] Freed by task 212: [ 40.061627] kasan_save_stack+0x22/0x50 [ 40.062242] kasan_set_track+0x25/0x30 [ 40.062782] kasan_save_free_info+0x2b/0x50 [ 40.063405] __kasan_slab_free+0x10a/0x190 [ 40.063987] kmem_cache_free+0x10d/0x4d0 [ 40.064541] rcu_core+0x8c8/0x2860 [ 40.065026] __do_softirq+0x1b7/0x7d4 [ 40.065540] [ 40.065774] Last potentially related work creation: [ 40.066403] kasan_save_stack+0x22/0x50 [ 40.066950] __kasan_record_aux_stack+0x8e/0xa0 [ 40.067592] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.068295] remove_vma+0x139/0x170 [ 40.068798] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.069421] do_vmi_munmap+0x1f1/0x2b0 [ 40.069966] __vm_munmap+0x138/0x3a0 [ 40.070488] __x64_sys_munmap+0x59/0x80 [ 40.071043] do_syscall_64+0x3f/0x90 [ 40.071573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.072292] [ 40.072532] The buggy address belongs to the object at ffff888015ef1000 [ 40.072532] which belongs to the cache vm_area_struct of size 168 [ 40.074166] The buggy address is located 88 bytes inside of [ 40.074166] freed 168-byte region [ffff888015ef1000, ffff888015ef10a8) [ 40.075739] [ 40.075978] The buggy address belongs to the physical page: [ 40.076710] page:00000000229a0d5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ef1 [ 40.077935] memcg:ffff88800fece701 [ 40.078417] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.079133] page_type: 0xffffffff() [ 40.079641] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.080666] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fece701 [ 40.081686] page dumped because: kasan: bad access detected [ 40.082410] [ 40.082644] Memory state around the buggy address: [ 40.083291] ffff888015ef0f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 40.084235] ffff888015ef0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.085178] >ffff888015ef1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.086113] ^ [ 40.086918] ffff888015ef1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 40.087860] ffff888015ef1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.088801] ================================================================== [ 40.089908] Disabling lock debugging due to kernel taint [ 42.122370] BUG: Bad rss-counter state mm:00000000e8878edb type:MM_FILEPAGES val:33 [ 42.123397] BUG: Bad rss-counter state mm:00000000e8878edb type:MM_ANONPAGES val:22 [ 42.593363] BUG: Bad rss-counter state mm:000000000a00786a type:MM_FILEPAGES val:33 [ 42.594385] BUG: Bad rss-counter state mm:000000000a00786a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63002' (ECDSA) to the list of known hosts. 2023/06/20 08:14:54 fuzzer started 2023/06/20 08:14:55 dialing manager at localhost:44161 2023/06/20 08:14:55 checking machine... 2023/06/20 08:14:55 checking revisions... [ 43.357854] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:14:55 testing simple program... [ 43.402050] cgroup: Unknown subsys name 'net' [ 43.462992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:14:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000008 RSI=ffff888016f67f50 RDI=ffff888016f67a90 RBP=ffff888016f67ae8 RSP=ffff888016f67a00 R8 =ffffffff864b024a R9 =ffff888016f67ad0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016f67af0 R13=ffff888016f67ad8 R14=ffff888016f67f58 R15=ffff888016f67a90 RIP=ffffffff81130400 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 00007fdf32dba900 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=00007fdf333720b0 CR3=000000000ca96000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb84a692048 CR3=000000000c6f4000 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=2034353a34313a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000