syzkaller login: [ 38.772832] BUG: Bad rss-counter state mm:000000002555f501 type:MM_FILEPAGES val:33 [ 38.774154] BUG: Bad rss-counter state mm:000000002555f501 type:MM_ANONPAGES val:22 [ 38.924475] ================================================================== [ 38.925538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.926649] Read of size 8 at addr ffff888019bec5c8 by task sshd/225 [ 38.927687] [ 38.927943] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.928992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.930250] Call Trace: [ 38.930634] [ 38.930967] dump_stack_lvl+0x91/0xf0 [ 38.931592] print_report+0xcc/0x620 [ 38.932234] ? __virt_addr_valid+0x102/0x340 [ 38.932788] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933400] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934008] kasan_report+0xbe/0xf0 [ 38.934477] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935098] vma_interval_tree_remove+0xc75/0xec0 [ 38.935702] vma_prepare+0xc54/0x11a0 [ 38.936181] __split_vma+0x5af/0x950 [ 38.936651] ? __pfx___split_vma+0x10/0x10 [ 38.937276] ? find_held_lock+0x2c/0x110 [ 38.937801] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.938389] ? lock_is_held_type+0x9f/0x120 [ 38.938980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.939628] ? mtree_range_walk+0x632/0x900 [ 38.940210] ? mas_walk+0x5c7/0x7c0 [ 38.940753] do_vmi_munmap+0x1f1/0x2b0 [ 38.941277] mmap_region+0x1f9/0x2660 [ 38.941765] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.942296] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.943064] ? __pfx_lock_acquire+0x10/0x10 [ 38.943637] ? __pfx_mmap_region+0x10/0x10 [ 38.944195] ? security_mmap_addr+0x7d/0xa0 [ 38.944819] ? get_unmapped_area+0x1f5/0x3f0 [ 38.945371] do_mmap+0x854/0xf00 [ 38.945842] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.946404] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.946999] ksys_mmap_pgoff+0x3af/0x500 [ 38.947516] do_syscall_64+0x3f/0x90 [ 38.948062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948706] RIP: 0033:0x7f8e63521d82 [ 38.949192] 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 [ 38.951480] RSP: 002b:00007ffc1023e168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.952389] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e63521d82 [ 38.953234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e6295b000 [ 38.954084] RBP: 00007f8e6295b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.954929] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba40601ec0 [ 38.955804] R13: 00007ffc1023e180 R14: 00007ffc1023e1b0 R15: 00007ffc1023e510 [ 38.956728] [ 38.957022] [ 38.957241] Allocated by task 218: [ 38.957674] kasan_save_stack+0x22/0x50 [ 38.958176] kasan_set_track+0x25/0x30 [ 38.958667] __kasan_slab_alloc+0x59/0x70 [ 38.959189] kmem_cache_alloc+0x16b/0x370 [ 38.959743] vm_area_dup+0x20/0x160 [ 38.960201] __split_vma+0x170/0x950 [ 38.960760] split_vma+0xc6/0x110 [ 38.961205] mprotect_fixup+0x8d2/0xb30 [ 38.961720] do_mprotect_pkey+0x87e/0xd40 [ 38.962289] __x64_sys_mprotect+0x78/0xc0 [ 38.962891] do_syscall_64+0x3f/0x90 [ 38.963365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964067] [ 38.964352] Freed by task 218: [ 38.964744] kasan_save_stack+0x22/0x50 [ 38.965281] kasan_set_track+0x25/0x30 [ 38.965774] kasan_save_free_info+0x2b/0x50 [ 38.966389] __kasan_slab_free+0x10a/0x190 [ 38.966923] kmem_cache_free+0x10d/0x4d0 [ 38.967471] rcu_core+0x8c8/0x2860 [ 38.968001] __do_softirq+0x1b7/0x7d4 [ 38.968523] [ 38.968737] Last potentially related work creation: [ 38.969325] kasan_save_stack+0x22/0x50 [ 38.969883] __kasan_record_aux_stack+0x8e/0xa0 [ 38.970457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.971148] remove_vma+0x139/0x170 [ 38.971664] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.972241] do_vmi_munmap+0x1f1/0x2b0 [ 38.972724] __vm_munmap+0x138/0x3a0 [ 38.973265] __x64_sys_munmap+0x59/0x80 [ 38.973762] do_syscall_64+0x3f/0x90 [ 38.974267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.974962] [ 38.975207] Second to last potentially related work creation: [ 38.975905] kasan_save_stack+0x22/0x50 [ 38.976494] __kasan_record_aux_stack+0x8e/0xa0 [ 38.977096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.977767] remove_vma+0x139/0x170 [ 38.978277] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.978858] do_vmi_munmap+0x1f1/0x2b0 [ 38.979341] mmap_region+0x1f9/0x2660 [ 38.979891] do_mmap+0x854/0xf00 [ 38.980351] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.980863] ksys_mmap_pgoff+0x3af/0x500 [ 38.981362] do_syscall_64+0x3f/0x90 [ 38.981903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982548] [ 38.982766] The buggy address belongs to the object at ffff888019bec570 [ 38.982766] which belongs to the cache vm_area_struct of size 168 [ 38.984352] The buggy address is located 88 bytes inside of [ 38.984352] freed 168-byte region [ffff888019bec570, ffff888019bec618) [ 38.985822] [ 38.986037] The buggy address belongs to the physical page: [ 38.986731] page:00000000c3c5b6db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bec [ 38.987903] memcg:ffff888019bd8201 [ 38.988329] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.989127] page_type: 0xffffffff() [ 38.989603] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.990595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bd8201 [ 38.991528] page dumped because: kasan: bad access detected [ 38.992294] [ 38.992510] Memory state around the buggy address: [ 38.993115] ffff888019bec480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.994059] ffff888019bec500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.994921] >ffff888019bec580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.995863] ^ [ 38.996552] ffff888019bec600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.997474] ffff888019bec680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.998331] ================================================================== [ 38.999404] Disabling lock debugging due to kernel taint [ 41.523862] BUG: Bad rss-counter state mm:000000008cfd63e1 type:MM_FILEPAGES val:33 [ 41.525063] BUG: Bad rss-counter state mm:000000008cfd63e1 type:MM_ANONPAGES val:22 [ 41.919703] BUG: Bad rss-counter state mm:00000000faff130f type:MM_FILEPAGES val:33 [ 41.920714] BUG: Bad rss-counter state mm:00000000faff130f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11963' (ECDSA) to the list of known hosts. 2023/06/20 22:00:48 fuzzer started 2023/06/20 22:00:48 dialing manager at localhost:36067 2023/06/20 22:00:48 checking machine... 2023/06/20 22:00:48 checking revisions... [ 42.637602] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:00:48 testing simple program... [ 42.693223] cgroup: Unknown subsys name 'net' [ 42.749399] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:00:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800dc20000 RSI=ffffffff8198b244 RDI=0000000000000005 RBP=ffff8880197a88d0 RSP=ffff88800eef7c60 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000002 R14=ffff88800c9cab80 R15=ffff88801969c808 RIP=ffffffff814c089b 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 00007f5014900700 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=00007ff5063c00b0 CR3=00000000169c0000 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=2038343a30303a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a30303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb9faf RBX=ffffffff85dcfd78 RCX=ffffffff814c84af RDX=0000000000000009 RSI=ffffffff860f3a7e RDI=ffffffff85dcfd68 RBP=ffffffff85dcfd68 RSP=ffff88806cf099e0 R8 =ffffffff860f3a7e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000154e9 R12=ffffffff85dcfd8c R13=ffffffff85dcfd68 R14=ffffffff85dcfd68 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007ff505e08900 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=00007ffc6e411000 CR3=000000000c8c6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000