syzkaller login: [ 30.850093] BUG: Bad rss-counter state mm:00000000e0a3eda1 type:MM_FILEPAGES val:33 [ 30.851126] BUG: Bad rss-counter state mm:00000000e0a3eda1 type:MM_ANONPAGES val:22 [ 31.006773] ================================================================== [ 31.007860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.008964] Read of size 8 at addr ffff888017edd058 by task sshd/220 [ 31.010019] [ 31.010279] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.011319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.012343] Call Trace: [ 31.012669] [ 31.012953] dump_stack_lvl+0x91/0xf0 [ 31.013455] print_report+0xcc/0x620 [ 31.013949] ? __virt_addr_valid+0x102/0x340 [ 31.014523] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.015158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.015799] kasan_report+0xbe/0xf0 [ 31.016292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.016943] vma_interval_tree_remove+0xc75/0xec0 [ 31.017563] vma_prepare+0xc54/0x11a0 [ 31.018066] __split_vma+0x5af/0x950 [ 31.018556] ? __pfx___split_vma+0x10/0x10 [ 31.019086] ? find_held_lock+0x2c/0x110 [ 31.019607] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.020169] ? lock_is_held_type+0x9f/0x120 [ 31.020735] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.021347] ? mtree_range_walk+0x632/0x900 [ 31.021899] ? mas_walk+0x5c7/0x7c0 [ 31.022369] do_vmi_munmap+0x1f1/0x2b0 [ 31.022902] mmap_region+0x1f9/0x2660 [ 31.023414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.023929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.024642] ? __pfx_lock_acquire+0x10/0x10 [ 31.025177] ? __pfx_mmap_region+0x10/0x10 [ 31.025706] ? security_mmap_addr+0x7d/0xa0 [ 31.026238] ? get_unmapped_area+0x1f5/0x3f0 [ 31.026795] do_mmap+0x854/0xf00 [ 31.027238] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.027760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.028347] ksys_mmap_pgoff+0x3af/0x500 [ 31.028874] do_syscall_64+0x3f/0x90 [ 31.029385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030092] RIP: 0033:0x7f0cbfb7ad82 [ 31.030578] 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 [ 31.032811] RSP: 002b:00007ffc94ca20f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.033731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0cbfb7ad82 [ 31.034602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0cbefb4000 [ 31.035449] RBP: 00007f0cbefb4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.036306] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da4d7cf980 [ 31.037180] R13: 00007ffc94ca2110 R14: 00007ffc94ca2140 R15: 00007ffc94ca24a0 [ 31.038082] [ 31.038374] [ 31.038595] Allocated by task 213: [ 31.039028] kasan_save_stack+0x22/0x50 [ 31.039535] kasan_set_track+0x25/0x30 [ 31.040030] __kasan_slab_alloc+0x59/0x70 [ 31.040550] kmem_cache_alloc+0x16b/0x370 [ 31.041086] vm_area_dup+0x20/0x160 [ 31.041557] __split_vma+0x170/0x950 [ 31.042040] split_vma+0xc6/0x110 [ 31.042498] mprotect_fixup+0x8d2/0xb30 [ 31.042996] do_mprotect_pkey+0x87e/0xd40 [ 31.043516] __x64_sys_mprotect+0x78/0xc0 [ 31.044035] do_syscall_64+0x3f/0x90 [ 31.044508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.045153] [ 31.045366] Freed by task 19: [ 31.045751] kasan_save_stack+0x22/0x50 [ 31.046256] kasan_set_track+0x25/0x30 [ 31.046754] kasan_save_free_info+0x2b/0x50 [ 31.047283] __kasan_slab_free+0x10a/0x190 [ 31.047811] kmem_cache_free+0x10d/0x4d0 [ 31.048314] rcu_core+0x8c8/0x2860 [ 31.048758] __do_softirq+0x1b7/0x7d4 [ 31.049230] [ 31.049450] Last potentially related work creation: [ 31.050041] kasan_save_stack+0x22/0x50 [ 31.050566] __kasan_record_aux_stack+0x8e/0xa0 [ 31.051143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.051790] remove_vma+0x139/0x170 [ 31.052243] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.052810] do_vmi_munmap+0x1f1/0x2b0 [ 31.053304] __vm_munmap+0x138/0x3a0 [ 31.053773] __x64_sys_munmap+0x59/0x80 [ 31.054280] do_syscall_64+0x3f/0x90 [ 31.054762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.055406] [ 31.055624] The buggy address belongs to the object at ffff888017edd000 [ 31.055624] which belongs to the cache vm_area_struct of size 168 [ 31.057115] The buggy address is located 88 bytes inside of [ 31.057115] freed 168-byte region [ffff888017edd000, ffff888017edd0a8) [ 31.058537] [ 31.058751] The buggy address belongs to the physical page: [ 31.059418] page:00000000f51e2aeb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17edd [ 31.060516] memcg:ffff88800fc93c01 [ 31.060945] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.061583] page_type: 0xffffffff() [ 31.062029] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.062965] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc93c01 [ 31.063864] page dumped because: kasan: bad access detected [ 31.064518] [ 31.064732] Memory state around the buggy address: [ 31.065309] ffff888017edcf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.066172] ffff888017edcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.067032] >ffff888017edd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.067889] ^ [ 31.068615] ffff888017edd080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.069465] ffff888017edd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.070315] ================================================================== [ 31.071473] Disabling lock debugging due to kernel taint [ 33.071765] BUG: Bad rss-counter state mm:000000000261d928 type:MM_FILEPAGES val:33 [ 33.072971] BUG: Bad rss-counter state mm:000000000261d928 type:MM_ANONPAGES val:22 [ 33.614655] BUG: Bad rss-counter state mm:000000005cc8c741 type:MM_FILEPAGES val:33 [ 33.615942] BUG: Bad rss-counter state mm:000000005cc8c741 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34136' (ECDSA) to the list of known hosts. 2023/06/20 16:51:05 fuzzer started 2023/06/20 16:51:05 dialing manager at localhost:36067 2023/06/20 16:51:05 checking machine... 2023/06/20 16:51:05 checking revisions... [ 34.252537] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:51:05 testing simple program... [ 34.303973] cgroup: Unknown subsys name 'net' [ 34.342861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:51:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1f22dc7f00 CR3=000000000e5e0000 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=2035303a31353a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a31353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff844c6ce9 RDX=dffffc0000000000 RSI=0000000000034c6c RDI=ffff88801640f050 RBP=ffff88801640f0a8 RSP=ffff88801640efe0 R8 =0000000000000001 R9 =ffff88801640f090 R10=0000000000038001 R11=00000000000b3f57 R12=ffff88801640f0b0 R13=ffff88801640f098 R14=ffff88801640f091 R15=ffff88801640f050 RIP=ffffffff81130754 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 00007f0983765900 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=00007f0983744020 CR3=000000000e6b6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000