syzkaller login: [ 60.563742] BUG: Bad rss-counter state mm:0000000019d4b663 type:MM_FILEPAGES val:33 [ 60.564763] BUG: Bad rss-counter state mm:0000000019d4b663 type:MM_ANONPAGES val:22 [ 60.728369] ================================================================== [ 60.729287] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.730220] Read of size 8 at addr ffff88800cf9d228 by task sshd/220 [ 60.731171] [ 60.731395] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.732270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.733259] Call Trace: [ 60.733580] [ 60.733870] dump_stack_lvl+0x91/0xf0 [ 60.734358] print_report+0xcc/0x620 [ 60.734841] ? __virt_addr_valid+0x102/0x340 [ 60.735395] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.736022] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.736642] kasan_report+0xbe/0xf0 [ 60.737116] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.737734] vma_interval_tree_remove+0xc75/0xec0 [ 60.738335] vma_prepare+0xc54/0x11a0 [ 60.738824] __split_vma+0x5af/0x950 [ 60.739295] ? __pfx___split_vma+0x10/0x10 [ 60.739855] ? find_held_lock+0x2c/0x110 [ 60.740391] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.740968] ? lock_is_held_type+0x9f/0x120 [ 60.741506] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.742117] ? mtree_range_walk+0x632/0x900 [ 60.742677] ? mas_walk+0x5c7/0x7c0 [ 60.743154] do_vmi_munmap+0x1f1/0x2b0 [ 60.743654] mmap_region+0x1f9/0x2660 [ 60.744152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.744672] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.745386] ? __pfx_lock_acquire+0x10/0x10 [ 60.745924] ? __pfx_mmap_region+0x10/0x10 [ 60.746458] ? security_mmap_addr+0x7d/0xa0 [ 60.746991] ? get_unmapped_area+0x1f5/0x3f0 [ 60.747552] do_mmap+0x854/0xf00 [ 60.748014] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.748509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.749071] ksys_mmap_pgoff+0x3af/0x500 [ 60.749578] do_syscall_64+0x3f/0x90 [ 60.750063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.750717] RIP: 0033:0x7f8ea9eadd82 [ 60.751182] 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 [ 60.753360] RSP: 002b:00007ffe71c16d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.754284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ea9eadd82 [ 60.755156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ea92e7000 [ 60.756030] RBP: 00007f8ea92e7000 R08: 0000000000000009 R09: 0000000000001000 [ 60.756904] R10: 0000000000000812 R11: 0000000000000206 R12: 000056068bb41ec0 [ 60.757767] R13: 00007ffe71c16d50 R14: 00007ffe71c16d80 R15: 00007ffe71c170e0 [ 60.758643] [ 60.758940] [ 60.759160] Allocated by task 213: [ 60.759600] kasan_save_stack+0x22/0x50 [ 60.760128] kasan_set_track+0x25/0x30 [ 60.760632] __kasan_slab_alloc+0x59/0x70 [ 60.761164] kmem_cache_alloc+0x16b/0x370 [ 60.761693] vm_area_dup+0x20/0x160 [ 60.762161] __split_vma+0x170/0x950 [ 60.762642] split_vma+0xc6/0x110 [ 60.763091] mprotect_fixup+0x8d2/0xb30 [ 60.763608] do_mprotect_pkey+0x87e/0xd40 [ 60.764145] __x64_sys_mprotect+0x78/0xc0 [ 60.764673] do_syscall_64+0x3f/0x90 [ 60.765157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.765803] [ 60.766021] Freed by task 213: [ 60.766412] kasan_save_stack+0x22/0x50 [ 60.766915] kasan_set_track+0x25/0x30 [ 60.767410] kasan_save_free_info+0x2b/0x50 [ 60.767961] __kasan_slab_free+0x10a/0x190 [ 60.768491] kmem_cache_free+0x10d/0x4d0 [ 60.769001] rcu_core+0x8c8/0x2860 [ 60.769444] __do_softirq+0x1b7/0x7d4 [ 60.769926] [ 60.770150] Last potentially related work creation: [ 60.770740] kasan_save_stack+0x22/0x50 [ 60.771245] __kasan_record_aux_stack+0x8e/0xa0 [ 60.771833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.772488] remove_vma+0x139/0x170 [ 60.772941] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.773504] do_vmi_munmap+0x1f1/0x2b0 [ 60.773990] __vm_munmap+0x138/0x3a0 [ 60.774465] __x64_sys_munmap+0x59/0x80 [ 60.774960] do_syscall_64+0x3f/0x90 [ 60.775439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.776108] [ 60.776325] The buggy address belongs to the object at ffff88800cf9d1d0 [ 60.776325] which belongs to the cache vm_area_struct of size 168 [ 60.777793] The buggy address is located 88 bytes inside of [ 60.777793] freed 168-byte region [ffff88800cf9d1d0, ffff88800cf9d278) [ 60.779233] [ 60.779454] The buggy address belongs to the physical page: [ 60.780134] page:00000000191c2bff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf9d [ 60.781253] memcg:ffff888014743301 [ 60.781681] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.782344] page_type: 0xffffffff() [ 60.782792] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.783725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014743301 [ 60.784657] page dumped because: kasan: bad access detected [ 60.785322] [ 60.785543] Memory state around the buggy address: [ 60.786128] ffff88800cf9d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.787000] ffff88800cf9d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 60.787869] >ffff88800cf9d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 60.788744] ^ [ 60.789308] ffff88800cf9d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.790189] ffff88800cf9d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.791051] ================================================================== [ 60.792221] Disabling lock debugging due to kernel taint [ 63.261584] BUG: Bad rss-counter state mm:00000000710a742c type:MM_FILEPAGES val:33 [ 63.262596] BUG: Bad rss-counter state mm:00000000710a742c type:MM_ANONPAGES val:22 [ 63.737649] BUG: Bad rss-counter state mm:00000000945e34db type:MM_FILEPAGES val:33 [ 63.738982] BUG: Bad rss-counter state mm:00000000945e34db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28095' (ECDSA) to the list of known hosts. 2023/06/19 12:04:28 fuzzer started 2023/06/19 12:04:29 dialing manager at localhost:44161 2023/06/19 12:04:29 checking machine... 2023/06/19 12:04:29 checking revisions... [ 64.466553] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:04:29 testing simple program... [ 64.511448] cgroup: Unknown subsys name 'net' [ 64.555158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:04:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fd09c1ba040 CR3=000000000b888000 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=2038323a34303a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a34303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008442140 RBX=ffff888016ab7638 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000cc0 RDI=0000000000000fff RBP=ffff888016ab7628 RSP=ffff888016ab75a0 R8 =0000000000000005 R9 =0000000000000280 R10=0000000000001000 R11=00000000000b6996 R12=0000000000000cc0 R13=00000000ffffffff R14=0000000000082cc0 R15=0000000000001000 RIP=ffffffff816cb3e7 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 00007f27f08b3900 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=00007ffdc1b7f000 CR3=00000000147c0000 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