syzkaller login: [ 28.763521] BUG: Bad rss-counter state mm:000000008e47425a type:MM_FILEPAGES val:33 [ 28.765011] BUG: Bad rss-counter state mm:000000008e47425a type:MM_ANONPAGES val:22 [ 28.902839] ================================================================== [ 28.903922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.904871] Read of size 8 at addr ffff888009f3e3f8 by task sshd/220 [ 28.905738] [ 28.905960] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.906828] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.907868] Call Trace: [ 28.908194] [ 28.908484] dump_stack_lvl+0x91/0xf0 [ 28.908987] print_report+0xcc/0x620 [ 28.909491] ? __virt_addr_valid+0x102/0x340 [ 28.910048] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.910675] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.911325] kasan_report+0xbe/0xf0 [ 28.911810] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.912438] vma_interval_tree_remove+0xc75/0xec0 [ 28.913045] vma_prepare+0xc54/0x11a0 [ 28.913530] __split_vma+0x5af/0x950 [ 28.914006] ? __pfx___split_vma+0x10/0x10 [ 28.914531] ? find_held_lock+0x2c/0x110 [ 28.915067] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.915643] ? lock_is_held_type+0x9f/0x120 [ 28.916190] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.916802] ? mtree_range_walk+0x632/0x900 [ 28.917358] ? mas_walk+0x5c7/0x7c0 [ 28.917839] do_vmi_munmap+0x1f1/0x2b0 [ 28.918336] mmap_region+0x1f9/0x2660 [ 28.918816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.919336] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.920065] ? __pfx_lock_acquire+0x10/0x10 [ 28.920602] ? __pfx_mmap_region+0x10/0x10 [ 28.921134] ? security_mmap_addr+0x7d/0xa0 [ 28.921668] ? get_unmapped_area+0x1f5/0x3f0 [ 28.922223] do_mmap+0x854/0xf00 [ 28.922671] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.923191] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.923761] ksys_mmap_pgoff+0x3af/0x500 [ 28.924272] do_syscall_64+0x3f/0x90 [ 28.924809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.925462] RIP: 0033:0x7f7178546d82 [ 28.925925] 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 [ 28.928084] RSP: 002b:00007ffcdbf54138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.928994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7178546d82 [ 28.929844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7177980000 [ 28.930702] RBP: 00007f7177980000 R08: 0000000000000009 R09: 0000000000001000 [ 28.931657] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c19c597d90 [ 28.932799] R13: 00007ffcdbf54150 R14: 00007ffcdbf54180 R15: 00007ffcdbf544e0 [ 28.933949] [ 28.934260] [ 28.934502] Allocated by task 212: [ 28.934940] kasan_save_stack+0x22/0x50 [ 28.935494] kasan_set_track+0x25/0x30 [ 28.936002] __kasan_slab_alloc+0x59/0x70 [ 28.936553] kmem_cache_alloc+0x16b/0x370 [ 28.937079] vm_area_dup+0x20/0x160 [ 28.937613] __split_vma+0x170/0x950 [ 28.938101] split_vma+0xc6/0x110 [ 28.938547] mprotect_fixup+0x8d2/0xb30 [ 28.939067] do_mprotect_pkey+0x87e/0xd40 [ 28.939610] __x64_sys_mprotect+0x78/0xc0 [ 28.940142] do_syscall_64+0x3f/0x90 [ 28.940625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.941278] [ 28.941497] Freed by task 212: [ 28.941898] kasan_save_stack+0x22/0x50 [ 28.942406] kasan_set_track+0x25/0x30 [ 28.942905] kasan_save_free_info+0x2b/0x50 [ 28.943468] __kasan_slab_free+0x10a/0x190 [ 28.944005] kmem_cache_free+0x10d/0x4d0 [ 28.944516] rcu_core+0x8c8/0x2860 [ 28.944976] __do_softirq+0x1b7/0x7d4 [ 28.945461] [ 28.945677] Last potentially related work creation: [ 28.946270] kasan_save_stack+0x22/0x50 [ 28.946773] __kasan_record_aux_stack+0x8e/0xa0 [ 28.947362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.948019] remove_vma+0x139/0x170 [ 28.948475] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.949040] do_vmi_munmap+0x1f1/0x2b0 [ 28.949527] __vm_munmap+0x138/0x3a0 [ 28.950001] __x64_sys_munmap+0x59/0x80 [ 28.950497] do_syscall_64+0x3f/0x90 [ 28.950977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951637] [ 28.951856] The buggy address belongs to the object at ffff888009f3e3a0 [ 28.951856] which belongs to the cache vm_area_struct of size 168 [ 28.953335] The buggy address is located 88 bytes inside of [ 28.953335] freed 168-byte region [ffff888009f3e3a0, ffff888009f3e448) [ 28.954809] [ 28.955034] The buggy address belongs to the physical page: [ 28.955748] page:0000000045863936 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9f3e [ 28.956869] memcg:ffff88800dd4eb01 [ 28.957303] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.958005] page_type: 0xffffffff() [ 28.958480] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.959433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd4eb01 [ 28.960358] page dumped because: kasan: bad access detected [ 28.961047] [ 28.961264] Memory state around the buggy address: [ 28.961884] ffff888009f3e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.962742] ffff888009f3e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.963595] >ffff888009f3e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.964453] ^ [ 28.965300] ffff888009f3e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.966165] ffff888009f3e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.967026] ================================================================== [ 28.968264] Disabling lock debugging due to kernel taint [ 31.355593] BUG: Bad rss-counter state mm:000000008f6b826f type:MM_FILEPAGES val:33 [ 31.356596] BUG: Bad rss-counter state mm:000000008f6b826f type:MM_ANONPAGES val:22 [ 31.857223] BUG: Bad rss-counter state mm:00000000f4135d72 type:MM_FILEPAGES val:33 [ 31.858167] BUG: Bad rss-counter state mm:00000000f4135d72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25832' (ECDSA) to the list of known hosts. 2023/06/20 17:00:39 fuzzer started 2023/06/20 17:00:39 dialing manager at localhost:36067 2023/06/20 17:00:39 checking machine... 2023/06/20 17:00:39 checking revisions... [ 32.585408] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:00:39 testing simple program... [ 32.635643] cgroup: Unknown subsys name 'net' [ 32.703904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:00:38 Registers: info registers vcpu 0 RAX=0000000000000051 RBX=0000000000000050 RCX=0000558718c52010 RDX=fffffffffffffe00 RSI=0000558718c6a620 RDI=00007f45ee887b80 RBP=00007f45ee887b80 RSP=00007ffc2b300050 R8 =0000000000000000 R9 =ffffffffffffff01 R10=0000000000000000 R11=0000000000000000 R12=0000558718c6a620 R13=0000000000000000 R14=0000558718c946a0 R15=00000000fffffffe RIP=00007f45ee74f98b RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f45edefe900 00000000 00000000 GS =0000 0000000000000000 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=00007f45ed41d000 CR3=000000000946a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6f8a55f769576eb100000000000ae988 XMM05=6fad0bf23df1949f0000000000133ed0 XMM06=4fda316b135da52b0000000000132cc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c766ad RBX=0000000000000001 RCX=ffffffff863b356c RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801837fad8 RSP=ffff88801837fa10 R8 =ffffffff863b3570 R9 =ffff88801837fac0 R10=0000000000038001 R11=000000000008a95e R12=ffff88801837fae0 R13=ffff88801837fac8 R14=ffff88801837fe80 R15=ffff88801837fa80 RIP=ffffffff81130b73 RFL=00000213 [----A-C] 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 00007f38a243c900 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=00007ffdf0ef2000 CR3=000000001c9ea000 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=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