syzkaller login: [ 161.276542] BUG: Bad rss-counter state mm:00000000ccad30ec type:MM_FILEPAGES val:33 [ 161.277641] BUG: Bad rss-counter state mm:00000000ccad30ec type:MM_ANONPAGES val:22 [ 161.428716] ================================================================== [ 161.429670] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 161.430670] Read of size 8 at addr ffff88800c550140 by task sshd/231 [ 161.431520] [ 161.431765] CPU: 1 PID: 231 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 161.433045] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 161.434092] Call Trace: [ 161.434441] [ 161.434747] dump_stack_lvl+0x91/0xf0 [ 161.435279] print_report+0xcc/0x620 [ 161.435805] ? __virt_addr_valid+0x102/0x340 [ 161.436385] ? vma_interval_tree_remove+0xc75/0xec0 [ 161.437035] ? vma_interval_tree_remove+0xc75/0xec0 [ 161.437697] kasan_report+0xbe/0xf0 [ 161.438206] ? vma_interval_tree_remove+0xc75/0xec0 [ 161.438867] vma_interval_tree_remove+0xc75/0xec0 [ 161.439536] vma_prepare+0xc54/0x11a0 [ 161.440051] __split_vma+0x5af/0x950 [ 161.440561] ? __pfx___split_vma+0x10/0x10 [ 161.441129] ? find_held_lock+0x2c/0x110 [ 161.441684] do_vmi_align_munmap+0x2ba/0x11f0 [ 161.442291] ? lock_is_held_type+0x9f/0x120 [ 161.442863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 161.443537] ? mtree_range_walk+0x632/0x900 [ 161.444126] ? mas_walk+0x5c7/0x7c0 [ 161.444630] do_vmi_munmap+0x1f1/0x2b0 [ 161.445161] mmap_region+0x1f9/0x2660 [ 161.445685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 161.446245] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 161.447008] ? __pfx_lock_acquire+0x10/0x10 [ 161.447599] ? __pfx_mmap_region+0x10/0x10 [ 161.448166] ? security_mmap_addr+0x7d/0xa0 [ 161.448739] ? get_unmapped_area+0x1f5/0x3f0 [ 161.449327] do_mmap+0x854/0xf00 [ 161.449792] vm_mmap_pgoff+0x1a6/0x3a0 [ 161.450328] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 161.450934] ksys_mmap_pgoff+0x3af/0x500 [ 161.451494] do_syscall_64+0x3f/0x90 [ 161.452010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 161.452698] RIP: 0033:0x7f9c238dad82 [ 161.453193] 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 [ 161.455494] RSP: 002b:00007ffc0a521518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 161.456467] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c238dad82 [ 161.457377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c22d14000 [ 161.458296] RBP: 00007f9c22d14000 R08: 0000000000000009 R09: 0000000000001000 [ 161.459220] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dcd0ec8ec0 [ 161.460142] R13: 00007ffc0a521530 R14: 00007ffc0a521560 R15: 00007ffc0a5218c0 [ 161.461067] [ 161.461383] [ 161.461620] Allocated by task 224: [ 161.462076] kasan_save_stack+0x22/0x50 [ 161.462615] kasan_set_track+0x25/0x30 [ 161.463149] __kasan_slab_alloc+0x59/0x70 [ 161.463734] kmem_cache_alloc+0x16b/0x370 [ 161.464286] vm_area_dup+0x20/0x160 [ 161.464774] __split_vma+0x170/0x950 [ 161.465272] split_vma+0xc6/0x110 [ 161.465742] mprotect_fixup+0x8d2/0xb30 [ 161.466297] do_mprotect_pkey+0x87e/0xd40 [ 161.466860] __x64_sys_mprotect+0x78/0xc0 [ 161.467438] do_syscall_64+0x3f/0x90 [ 161.467944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 161.468630] [ 161.468858] Freed by task 224: [ 161.469282] kasan_save_stack+0x22/0x50 [ 161.469820] kasan_set_track+0x25/0x30 [ 161.470354] kasan_save_free_info+0x2b/0x50 [ 161.470931] __kasan_slab_free+0x10a/0x190 [ 161.471520] kmem_cache_free+0x10d/0x4d0 [ 161.472065] rcu_core+0x8c8/0x2860 [ 161.472542] __do_softirq+0x1b7/0x7d4 [ 161.473055] [ 161.473319] Last potentially related work creation: [ 161.473961] kasan_save_stack+0x22/0x50 [ 161.474502] __kasan_record_aux_stack+0x8e/0xa0 [ 161.475115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 161.475822] remove_vma+0x139/0x170 [ 161.476305] do_vmi_align_munmap+0xd4a/0x11f0 [ 161.476902] do_vmi_munmap+0x1f1/0x2b0 [ 161.477428] __vm_munmap+0x138/0x3a0 [ 161.477926] __x64_sys_munmap+0x59/0x80 [ 161.478459] do_syscall_64+0x3f/0x90 [ 161.478963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 161.479656] [ 161.479885] The buggy address belongs to the object at ffff88800c5500e8 [ 161.479885] which belongs to the cache vm_area_struct of size 168 [ 161.481462] The buggy address is located 88 bytes inside of [ 161.481462] freed 168-byte region [ffff88800c5500e8, ffff88800c550190) [ 161.482977] [ 161.483209] The buggy address belongs to the physical page: [ 161.483938] page:0000000087536f70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc550 [ 161.485111] memcg:ffff888014440401 [ 161.485567] flags: 0x100000000000200(slab|node=0|zone=1) [ 161.486262] page_type: 0xffffffff() [ 161.486743] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 161.487737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014440401 [ 161.488707] page dumped because: kasan: bad access detected [ 161.489418] [ 161.489655] Memory state around the buggy address: [ 161.490278] ffff88800c550000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 161.491188] ffff88800c550080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 161.492139] >ffff88800c550100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 161.493061] ^ [ 161.493749] ffff88800c550180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 161.494662] ffff88800c550200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 161.495582] ================================================================== [ 161.496568] Disabling lock debugging due to kernel taint [ 163.564367] BUG: Bad rss-counter state mm:00000000e98b3443 type:MM_FILEPAGES val:33 [ 163.565578] BUG: Bad rss-counter state mm:00000000e98b3443 type:MM_ANONPAGES val:22 [ 163.962198] BUG: Bad rss-counter state mm:0000000064b52335 type:MM_FILEPAGES val:33 [ 163.963590] BUG: Bad rss-counter state mm:0000000064b52335 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16034' (ECDSA) to the list of known hosts. 2023/06/19 11:07:59 fuzzer started 2023/06/19 11:08:00 dialing manager at localhost:44161 2023/06/19 11:08:00 checking machine... 2023/06/19 11:08:00 checking revisions... [ 164.645559] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:08:00 testing simple program... [ 164.695693] cgroup: Unknown subsys name 'net' [ 164.750218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016b8fc38 RCX=0000000000000000 RDX=ffff888015dd9b40 RSI=ffffffff81f4cb79 RDI=0000000000000005 RBP=ffff888008f05008 RSP=ffff888016b8f9d0 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffda4 R11=0000000000000000 R12=0000000000000031 R13=ffff888008e180e0 R14=1ffff11002d71f3e R15=00000000ffffffea RIP=ffffffff81f762a4 RFL=00000282 [--S----] 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 00007f153db22900 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=00007f153e0da0b0 CR3=000000000f2b4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f4488a4f000 CR3=000000000d9f6000 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=bfa8ee3db4abb8806140db1bbd904ceb XMM02=000000000012dc70ec2efd57dc4c00df XMM03=0000000000133e8061fec7d18aaf650b XMM04=153fdad33b44239400000000000ae988 XMM05=d96330e2d2db863200000000001436c0 XMM06=24328c3077b76a540000000000142898 XMM07=e042d86d42eb936e0000000000134100 XMM08=61fec7d18aaf650b000000000012dcd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000