syzkaller login: [ 33.774484] BUG: Bad rss-counter state mm:000000006528a9c7 type:MM_FILEPAGES val:33 [ 33.775686] BUG: Bad rss-counter state mm:000000006528a9c7 type:MM_ANONPAGES val:22 [ 33.939243] ================================================================== [ 33.940155] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.941084] Read of size 8 at addr ffff888016159228 by task sshd/221 [ 33.942028] [ 33.942258] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.943134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.944104] Call Trace: [ 33.944559] [ 33.944895] dump_stack_lvl+0x91/0xf0 [ 33.945464] print_report+0xcc/0x620 [ 33.946042] ? __virt_addr_valid+0x102/0x340 [ 33.946702] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.947417] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.948130] kasan_report+0xbe/0xf0 [ 33.948696] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.949452] vma_interval_tree_remove+0xc75/0xec0 [ 33.950214] vma_prepare+0xc54/0x11a0 [ 33.950736] __split_vma+0x5af/0x950 [ 33.951208] ? __pfx___split_vma+0x10/0x10 [ 33.951727] ? find_held_lock+0x2c/0x110 [ 33.952241] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.952799] ? lock_is_held_type+0x9f/0x120 [ 33.953328] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.953926] ? mtree_range_walk+0x632/0x900 [ 33.954481] ? mas_walk+0x5c7/0x7c0 [ 33.954954] do_vmi_munmap+0x1f1/0x2b0 [ 33.955451] mmap_region+0x1f9/0x2660 [ 33.955924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.956427] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.957131] ? __pfx_lock_acquire+0x10/0x10 [ 33.957675] ? __pfx_mmap_region+0x10/0x10 [ 33.958209] ? security_mmap_addr+0x7d/0xa0 [ 33.958739] ? get_unmapped_area+0x1f5/0x3f0 [ 33.959291] do_mmap+0x854/0xf00 [ 33.959726] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.960225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.960776] ksys_mmap_pgoff+0x3af/0x500 [ 33.961271] do_syscall_64+0x3f/0x90 [ 33.961738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.962401] RIP: 0033:0x7f3c39b52d82 [ 33.962853] 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 [ 33.965013] RSP: 002b:00007fffa2450528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.965916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c39b52d82 [ 33.966772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c38f8c000 [ 33.967604] RBP: 00007f3c38f8c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.968451] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563681eebec0 [ 33.969292] R13: 00007fffa2450540 R14: 00007fffa2450570 R15: 00007fffa24508d0 [ 33.970147] [ 33.970438] [ 33.970650] Allocated by task 214: [ 33.971072] kasan_save_stack+0x22/0x50 [ 33.971575] kasan_set_track+0x25/0x30 [ 33.972061] __kasan_slab_alloc+0x59/0x70 [ 33.972576] kmem_cache_alloc+0x16b/0x370 [ 33.973082] vm_area_dup+0x20/0x160 [ 33.973531] __split_vma+0x170/0x950 [ 33.973998] split_vma+0xc6/0x110 [ 33.974460] mprotect_fixup+0x8d2/0xb30 [ 33.974964] do_mprotect_pkey+0x87e/0xd40 [ 33.975482] __x64_sys_mprotect+0x78/0xc0 [ 33.975998] do_syscall_64+0x3f/0x90 [ 33.976465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.977101] [ 33.977312] Freed by task 214: [ 33.977700] kasan_save_stack+0x22/0x50 [ 33.978205] kasan_set_track+0x25/0x30 [ 33.978689] kasan_save_free_info+0x2b/0x50 [ 33.979215] __kasan_slab_free+0x10a/0x190 [ 33.979748] kmem_cache_free+0x10d/0x4d0 [ 33.980249] rcu_core+0x8c8/0x2860 [ 33.980701] __do_softirq+0x1b7/0x7d4 [ 33.981169] [ 33.981382] Last potentially related work creation: [ 33.981956] kasan_save_stack+0x22/0x50 [ 33.982482] __kasan_record_aux_stack+0x8e/0xa0 [ 33.983130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.983763] remove_vma+0x139/0x170 [ 33.984209] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.984760] do_vmi_munmap+0x1f1/0x2b0 [ 33.985241] __vm_munmap+0x138/0x3a0 [ 33.985707] __x64_sys_munmap+0x59/0x80 [ 33.986220] do_syscall_64+0x3f/0x90 [ 33.986688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.987319] [ 33.987531] The buggy address belongs to the object at ffff8880161591d0 [ 33.987531] which belongs to the cache vm_area_struct of size 168 [ 33.988964] The buggy address is located 88 bytes inside of [ 33.988964] freed 168-byte region [ffff8880161591d0, ffff888016159278) [ 33.990359] [ 33.990574] The buggy address belongs to the physical page: [ 33.991219] page:00000000a011eeb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16159 [ 33.992290] memcg:ffff88801615a001 [ 33.992720] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.993358] page_type: 0xffffffff() [ 33.993808] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.994731] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801615a001 [ 33.995622] page dumped because: kasan: bad access detected [ 33.996273] [ 33.996487] Memory state around the buggy address: [ 33.997059] ffff888016159100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.997899] ffff888016159180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.998746] >ffff888016159200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.999584] ^ [ 34.000134] ffff888016159280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.000974] ffff888016159300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.001805] ================================================================== [ 34.002801] Disabling lock debugging due to kernel taint [ 36.054824] BUG: Bad rss-counter state mm:00000000fa209ada type:MM_FILEPAGES val:33 [ 36.055724] BUG: Bad rss-counter state mm:00000000fa209ada type:MM_ANONPAGES val:22 [ 36.626043] BUG: Bad rss-counter state mm:000000000136183f type:MM_FILEPAGES val:33 [ 36.627268] BUG: Bad rss-counter state mm:000000000136183f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4011' (ECDSA) to the list of known hosts. 2023/06/19 17:58:07 fuzzer started 2023/06/19 17:58:08 dialing manager at localhost:44161 2023/06/19 17:58:08 checking machine... 2023/06/19 17:58:08 checking revisions... [ 37.301469] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:58:08 testing simple program... [ 37.355605] cgroup: Unknown subsys name 'net' [ 37.417268] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:58:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860acb48 RDX=1ffff110011aff3c RSI=1ffff110011aff3a RDI=ffff888008d7f9e0 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff860acb4c R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000009bea R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7ff58 R15=ffff888008d7f978 RIP=ffffffff811310f5 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 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=00007ffc6ffd92b8 CR3=000000000e3b4000 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=2037303a38353a3731203931206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a363634303620 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a38353a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff856d8220 RCX=ffffffff812e00e5 RDX=ffffed100d9e13ab RSI=0000000000000004 RDI=ffff88806cf09d58 RBP=1ffff1100d9e13a7 RSP=ffff88806cf09d28 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=ffffffff856d8228 R13=ffffffff856d8230 R14=ffffffff818d9dc6 R15=ffff88800efd4580 RIP=ffffffff8180efb7 RFL=00000097 [--S-APC] 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 00007efc14730900 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=00007f221a5bd650 CR3=000000000c6d4000 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=ad33049e186919a878462230ee91b29a XMM02=000000000011cd98eff9b2d0a8fce9cb XMM03=000000000011ce682c67c8bc2e329bc3 XMM04=e8585f52091c2dd900000000000ae988 XMM05=695df9efb7e160950000000000135480 XMM06=37a233432db4163a0000000000134220 XMM07=fb795ef6d65770560000000000124750 XMM08=2c67c8bc2e329bc3000000000011ce08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000