syzkaller login: [ 24.310602] BUG: Bad rss-counter state mm:000000003aa5898d type:MM_FILEPAGES val:33 [ 24.311500] BUG: Bad rss-counter state mm:000000003aa5898d type:MM_ANONPAGES val:22 [ 24.444135] ================================================================== [ 24.444852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.445645] Read of size 8 at addr ffff88800f083880 by task sshd/219 [ 24.446244] [ 24.446419] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.447106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.448049] Call Trace: [ 24.448312] [ 24.448531] dump_stack_lvl+0x91/0xf0 [ 24.448920] print_report+0xcc/0x620 [ 24.449296] ? __virt_addr_valid+0x102/0x340 [ 24.449734] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.450233] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.450720] kasan_report+0xbe/0xf0 [ 24.451119] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.451614] vma_interval_tree_remove+0xc75/0xec0 [ 24.452084] vma_prepare+0xc54/0x11a0 [ 24.452463] __split_vma+0x5af/0x950 [ 24.452835] ? __pfx___split_vma+0x10/0x10 [ 24.453251] ? find_held_lock+0x2c/0x110 [ 24.453676] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.454113] ? lock_is_held_type+0x9f/0x120 [ 24.454533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.455004] ? mtree_range_walk+0x632/0x900 [ 24.455416] ? mas_walk+0x5c7/0x7c0 [ 24.455762] do_vmi_munmap+0x1f1/0x2b0 [ 24.456129] mmap_region+0x1f9/0x2660 [ 24.456483] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.456866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.457397] ? __pfx_lock_acquire+0x10/0x10 [ 24.457805] ? __pfx_mmap_region+0x10/0x10 [ 24.458195] ? security_mmap_addr+0x7d/0xa0 [ 24.458592] ? get_unmapped_area+0x1f5/0x3f0 [ 24.459026] do_mmap+0x854/0xf00 [ 24.459350] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.459738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.460187] ksys_mmap_pgoff+0x3af/0x500 [ 24.460614] do_syscall_64+0x3f/0x90 [ 24.460968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.461460] RIP: 0033:0x7fe786732d82 [ 24.461804] 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 [ 24.463392] RSP: 002b:00007ffc6bc53168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.464069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe786732d82 [ 24.464696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe785b6c000 [ 24.465317] RBP: 00007fe785b6c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.465955] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d322f2ec0 [ 24.466588] R13: 00007ffc6bc53180 R14: 00007ffc6bc531b0 R15: 00007ffc6bc53510 [ 24.467249] [ 24.467473] [ 24.467632] Allocated by task 211: [ 24.467951] kasan_save_stack+0x22/0x50 [ 24.468320] kasan_set_track+0x25/0x30 [ 24.468687] __kasan_slab_alloc+0x59/0x70 [ 24.469071] kmem_cache_alloc+0x16b/0x370 [ 24.469467] vm_area_dup+0x20/0x160 [ 24.469801] __split_vma+0x170/0x950 [ 24.470144] split_vma+0xc6/0x110 [ 24.470467] mprotect_fixup+0x8d2/0xb30 [ 24.470844] do_mprotect_pkey+0x87e/0xd40 [ 24.471240] __x64_sys_mprotect+0x78/0xc0 [ 24.471630] do_syscall_64+0x3f/0x90 [ 24.471979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.472451] [ 24.472607] Freed by task 19: [ 24.472893] kasan_save_stack+0x22/0x50 [ 24.473261] kasan_set_track+0x25/0x30 [ 24.473640] kasan_save_free_info+0x2b/0x50 [ 24.474030] __kasan_slab_free+0x10a/0x190 [ 24.474426] kmem_cache_free+0x10d/0x4d0 [ 24.474800] rcu_core+0x8c8/0x2860 [ 24.475149] __do_softirq+0x1b7/0x7d4 [ 24.475505] [ 24.475666] Last potentially related work creation: [ 24.476098] kasan_save_stack+0x22/0x50 [ 24.476474] __kasan_record_aux_stack+0x8e/0xa0 [ 24.476898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.477370] remove_vma+0x139/0x170 [ 24.477730] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.478144] do_vmi_munmap+0x1f1/0x2b0 [ 24.478502] __vm_munmap+0x138/0x3a0 [ 24.478852] __x64_sys_munmap+0x59/0x80 [ 24.479236] do_syscall_64+0x3f/0x90 [ 24.479587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.480058] [ 24.480217] Second to last potentially related work creation: [ 24.480720] kasan_save_stack+0x22/0x50 [ 24.481090] __kasan_record_aux_stack+0x8e/0xa0 [ 24.481523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.481998] remove_vma+0x139/0x170 [ 24.482332] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.482740] do_vmi_munmap+0x1f1/0x2b0 [ 24.483119] mmap_region+0x1f9/0x2660 [ 24.483475] do_mmap+0x854/0xf00 [ 24.483793] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.484153] ksys_mmap_pgoff+0x3af/0x500 [ 24.484519] do_syscall_64+0x3f/0x90 [ 24.484866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.485339] [ 24.485521] The buggy address belongs to the object at ffff88800f083828 [ 24.485521] which belongs to the cache vm_area_struct of size 168 [ 24.486607] The buggy address is located 88 bytes inside of [ 24.486607] freed 168-byte region [ffff88800f083828, ffff88800f0838d0) [ 24.487661] [ 24.487823] The buggy address belongs to the physical page: [ 24.488312] page:0000000081c5bb26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf083 [ 24.489168] memcg:ffff88800e882d01 [ 24.489489] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.489963] page_type: 0xffffffff() [ 24.490295] raw: 0100000000000200 ffff88800879fc80 ffffea0000377ec0 dead000000000002 [ 24.490982] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e882d01 [ 24.491644] page dumped because: kasan: bad access detected [ 24.492128] [ 24.492288] Memory state around the buggy address: [ 24.492714] ffff88800f083780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.493344] ffff88800f083800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.494471] >ffff88800f083880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.495578] ^ [ 24.496098] ffff88800f083900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.497160] ffff88800f083980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 24.498247] ================================================================== [ 24.499474] Disabling lock debugging due to kernel taint [ 26.524796] BUG: Bad rss-counter state mm:00000000a7fe2f51 type:MM_FILEPAGES val:33 [ 26.525990] BUG: Bad rss-counter state mm:00000000a7fe2f51 type:MM_ANONPAGES val:22 [ 26.993495] BUG: Bad rss-counter state mm:00000000b4cf9ef7 type:MM_FILEPAGES val:33 [ 26.995140] BUG: Bad rss-counter state mm:00000000b4cf9ef7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13644' (ECDSA) to the list of known hosts. 2023/06/19 14:26:58 fuzzer started 2023/06/19 14:26:58 dialing manager at localhost:44161 2023/06/19 14:26:58 checking machine... 2023/06/19 14:26:58 checking revisions... [ 27.758137] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:26:58 testing simple program... [ 27.812593] cgroup: Unknown subsys name 'net' [ 27.864273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:57 Registers: info registers vcpu 0 RAX=000000001b3c72d2 RBX=00000000561d5cbc RCX=ffff88801cd9fad4 RDX=000000000000000e RSI=0000000000000013 RDI=00000000a09c66d8 RBP=ffff8880087b0500 RSP=ffff88801cd9fa48 R8 =000000003ae0e9ea R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000d40 R14=ffff88801cd9fab0 R15=000000000000000e RIP=ffffffff82270ec6 RFL=00000202 [-------] 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 00007feaa55c5900 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=00007ffe4c551000 CR3=000000000ea2c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f0dea1f4980 CR3=00000000192de000 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=36323a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303438 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000