syzkaller login: [ 39.593188] BUG: Bad rss-counter state mm:00000000220ad461 type:MM_FILEPAGES val:33 [ 39.594595] BUG: Bad rss-counter state mm:00000000220ad461 type:MM_ANONPAGES val:22 [ 39.634873] ================================================================== [ 39.636174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.637558] Read of size 8 at addr ffff88800e1d9b38 by task sshd/221 [ 39.638536] [ 39.638792] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.640017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.641418] Call Trace: [ 39.641903] [ 39.642250] dump_stack_lvl+0x91/0xf0 [ 39.642966] print_report+0xcc/0x620 [ 39.643626] ? __virt_addr_valid+0x102/0x340 [ 39.644403] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.645242] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.646115] kasan_report+0xbe/0xf0 [ 39.646753] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.647587] vma_interval_tree_remove+0xc75/0xec0 [ 39.648370] vma_prepare+0xc54/0x11a0 [ 39.648992] __split_vma+0x5af/0x950 [ 39.649557] ? __pfx___split_vma+0x10/0x10 [ 39.650255] ? find_held_lock+0x2c/0x110 [ 39.650954] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.651640] ? lock_is_held_type+0x9f/0x120 [ 39.652291] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.653021] ? mtree_range_walk+0x632/0x900 [ 39.653679] ? mas_walk+0x5c7/0x7c0 [ 39.654238] do_vmi_munmap+0x1f1/0x2b0 [ 39.654820] mmap_region+0x1f9/0x2660 [ 39.655402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.656015] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.656878] ? __pfx_lock_acquire+0x10/0x10 [ 39.657526] ? __pfx_mmap_region+0x10/0x10 [ 39.658166] ? security_mmap_addr+0x7d/0xa0 [ 39.658802] ? get_unmapped_area+0x1f5/0x3f0 [ 39.659463] do_mmap+0x854/0xf00 [ 39.659984] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.660583] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.661254] ksys_mmap_pgoff+0x3af/0x500 [ 39.661866] do_syscall_64+0x3f/0x90 [ 39.662428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.663219] RIP: 0033:0x7f6c7dc66d82 [ 39.663768] 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 [ 39.666046] RSP: 002b:00007ffdd2aa4968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.666921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c7dc66d82 [ 39.667716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c7d0a0000 [ 39.668513] RBP: 00007f6c7d0a0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.669332] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575dddd0ec0 [ 39.670172] R13: 00007ffdd2aa4980 R14: 00007ffdd2aa49b0 R15: 00007ffdd2aa4d10 [ 39.671007] [ 39.671284] [ 39.671489] Allocated by task 214: [ 39.671892] kasan_save_stack+0x22/0x50 [ 39.672367] kasan_set_track+0x25/0x30 [ 39.672833] __kasan_slab_alloc+0x59/0x70 [ 39.673328] kmem_cache_alloc+0x16b/0x370 [ 39.673813] vm_area_dup+0x20/0x160 [ 39.674244] __split_vma+0x170/0x950 [ 39.674699] split_vma+0xc6/0x110 [ 39.675132] mprotect_fixup+0x8d2/0xb30 [ 39.675612] do_mprotect_pkey+0x87e/0xd40 [ 39.676106] __x64_sys_mprotect+0x78/0xc0 [ 39.676618] do_syscall_64+0x3f/0x90 [ 39.677074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.677700] [ 39.677908] Freed by task 214: [ 39.678275] kasan_save_stack+0x22/0x50 [ 39.678814] kasan_set_track+0x25/0x30 [ 39.679310] kasan_save_free_info+0x2b/0x50 [ 39.679831] __kasan_slab_free+0x10a/0x190 [ 39.680339] kmem_cache_free+0x10d/0x4d0 [ 39.680839] rcu_core+0x8c8/0x2860 [ 39.681270] __do_softirq+0x1b7/0x7d4 [ 39.681738] [ 39.681943] Last potentially related work creation: [ 39.682502] kasan_save_stack+0x22/0x50 [ 39.683005] __kasan_record_aux_stack+0x8e/0xa0 [ 39.683566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.684189] remove_vma+0x139/0x170 [ 39.684629] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.685168] do_vmi_munmap+0x1f1/0x2b0 [ 39.685635] __vm_munmap+0x138/0x3a0 [ 39.686086] __x64_sys_munmap+0x59/0x80 [ 39.686577] do_syscall_64+0x3f/0x90 [ 39.687042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.687672] [ 39.687878] The buggy address belongs to the object at ffff88800e1d9ae0 [ 39.687878] which belongs to the cache vm_area_struct of size 168 [ 39.689299] The buggy address is located 88 bytes inside of [ 39.689299] freed 168-byte region [ffff88800e1d9ae0, ffff88800e1d9b88) [ 39.690663] [ 39.690871] The buggy address belongs to the physical page: [ 39.691534] page:00000000b73d86cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1d9 [ 39.692583] memcg:ffff88800e0d1901 [ 39.692998] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.693623] page_type: 0xffffffff() [ 39.694061] raw: 0100000000000200 ffff88800879fc80 ffffea00003cc280 dead000000000006 [ 39.694962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d1901 [ 39.695850] page dumped because: kasan: bad access detected [ 39.696495] [ 39.696702] Memory state around the buggy address: [ 39.697267] ffff88800e1d9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.698107] ffff88800e1d9a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.698938] >ffff88800e1d9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.699761] ^ [ 39.700359] ffff88800e1d9b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.701193] ffff88800e1d9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.702023] ================================================================== [ 39.703055] Disabling lock debugging due to kernel taint [ 41.704094] BUG: Bad rss-counter state mm:000000002011842c type:MM_FILEPAGES val:33 [ 41.705235] BUG: Bad rss-counter state mm:000000002011842c type:MM_ANONPAGES val:22 [ 42.100059] BUG: Bad rss-counter state mm:00000000e264ad30 type:MM_FILEPAGES val:33 [ 42.101215] BUG: Bad rss-counter state mm:00000000e264ad30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7607' (ECDSA) to the list of known hosts. 2023/06/19 14:59:50 fuzzer started 2023/06/19 14:59:51 dialing manager at localhost:44161 2023/06/19 14:59:51 checking machine... 2023/06/19 14:59:51 checking revisions... [ 42.782146] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:59:51 testing simple program... [ 42.822979] cgroup: Unknown subsys name 'net' [ 42.868838] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:59:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880162a9288 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880162a928c RBP=1ffff110037baf9d RSP=ffff88801bdd7ce0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880162a9200 R13=ffff8880162a9288 R14=ffffffff84d2fa00 R15=ffff888008f92000 RIP=ffffffff812e0005 RFL=00000212 [----A--] 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 00007f0fb0d08900 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=00007ffdfc4f5000 CR3=000000000fd0c000 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=0000000000000001 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=00007f8b4b1f01a0 CR3=000000000fd0a000 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=2030353a39353a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a39353a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000