syzkaller login: [ 42.445321] BUG: Bad rss-counter state mm:00000000d7df9de5 type:MM_FILEPAGES val:33 [ 42.446858] BUG: Bad rss-counter state mm:00000000d7df9de5 type:MM_ANONPAGES val:22 [ 42.578075] ================================================================== [ 42.579147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.580284] Read of size 8 at addr ffff88801827fdf0 by task sshd/220 [ 42.581286] [ 42.581503] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.582365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.583365] Call Trace: [ 42.583690] [ 42.583974] dump_stack_lvl+0x91/0xf0 [ 42.584471] print_report+0xcc/0x620 [ 42.584955] ? __virt_addr_valid+0x102/0x340 [ 42.585505] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.586118] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.586737] kasan_report+0xbe/0xf0 [ 42.587213] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.587840] vma_interval_tree_remove+0xc75/0xec0 [ 42.588448] vma_prepare+0xc54/0x11a0 [ 42.588922] __split_vma+0x5af/0x950 [ 42.589402] ? __pfx___split_vma+0x10/0x10 [ 42.589931] ? find_held_lock+0x2c/0x110 [ 42.590449] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.591023] ? lock_is_held_type+0x9f/0x120 [ 42.591560] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.592172] ? mtree_range_walk+0x632/0x900 [ 42.592757] ? mas_walk+0x5c7/0x7c0 [ 42.593236] do_vmi_munmap+0x1f1/0x2b0 [ 42.593731] mmap_region+0x1f9/0x2660 [ 42.594221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.594734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.595459] ? __pfx_lock_acquire+0x10/0x10 [ 42.595992] ? __pfx_mmap_region+0x10/0x10 [ 42.596527] ? security_mmap_addr+0x7d/0xa0 [ 42.597060] ? get_unmapped_area+0x1f5/0x3f0 [ 42.597610] do_mmap+0x854/0xf00 [ 42.598055] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.598546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.599117] ksys_mmap_pgoff+0x3af/0x500 [ 42.599621] do_syscall_64+0x3f/0x90 [ 42.600100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.600765] RIP: 0033:0x7fd114dead82 [ 42.601230] 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 [ 42.603375] RSP: 002b:00007ffe8f0dd898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.604291] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd114dead82 [ 42.605135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd114224000 [ 42.605986] RBP: 00007fd114224000 R08: 0000000000000009 R09: 0000000000001000 [ 42.606832] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff5e386b20 [ 42.607668] R13: 00007ffe8f0dd8b0 R14: 00007ffe8f0dd8e0 R15: 00007ffe8f0ddc40 [ 42.608533] [ 42.608827] [ 42.609042] Allocated by task 213: [ 42.609476] kasan_save_stack+0x22/0x50 [ 42.609984] kasan_set_track+0x25/0x30 [ 42.610472] __kasan_slab_alloc+0x59/0x70 [ 42.611001] kmem_cache_alloc+0x16b/0x370 [ 42.611512] vm_area_dup+0x20/0x160 [ 42.611967] __split_vma+0x170/0x950 [ 42.612451] split_vma+0xc6/0x110 [ 42.612887] mprotect_fixup+0x8d2/0xb30 [ 42.613394] do_mprotect_pkey+0x87e/0xd40 [ 42.613909] __x64_sys_mprotect+0x78/0xc0 [ 42.614428] do_syscall_64+0x3f/0x90 [ 42.614897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.615547] [ 42.615766] Freed by task 213: [ 42.616155] kasan_save_stack+0x22/0x50 [ 42.616665] kasan_set_track+0x25/0x30 [ 42.617159] kasan_save_free_info+0x2b/0x50 [ 42.617687] __kasan_slab_free+0x10a/0x190 [ 42.618225] kmem_cache_free+0x10d/0x4d0 [ 42.618732] rcu_core+0x8c8/0x2860 [ 42.619179] __do_softirq+0x1b7/0x7d4 [ 42.619653] [ 42.619870] Last potentially related work creation: [ 42.620465] kasan_save_stack+0x22/0x50 [ 42.620972] __kasan_record_aux_stack+0x8e/0xa0 [ 42.621543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.622235] remove_vma+0x139/0x170 [ 42.622689] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.623246] do_vmi_munmap+0x1f1/0x2b0 [ 42.623725] __vm_munmap+0x138/0x3a0 [ 42.624200] __x64_sys_munmap+0x59/0x80 [ 42.624711] do_syscall_64+0x3f/0x90 [ 42.625184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.625822] [ 42.626037] The buggy address belongs to the object at ffff88801827fd98 [ 42.626037] which belongs to the cache vm_area_struct of size 168 [ 42.627518] The buggy address is located 88 bytes inside of [ 42.627518] freed 168-byte region [ffff88801827fd98, ffff88801827fe40) [ 42.628929] [ 42.629142] The buggy address belongs to the physical page: [ 42.629807] page:0000000048979e92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1827f [ 42.630897] memcg:ffff888018104001 [ 42.631322] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.631967] page_type: 0xffffffff() [ 42.632434] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.633345] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018104001 [ 42.634261] page dumped because: kasan: bad access detected [ 42.634914] [ 42.635130] Memory state around the buggy address: [ 42.635709] ffff88801827fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 42.636574] ffff88801827fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 42.637444] >ffff88801827fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.638305] ^ [ 42.639105] ffff88801827fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.639963] ffff88801827fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.640836] ================================================================== [ 42.641755] Disabling lock debugging due to kernel taint [ 44.876076] BUG: Bad rss-counter state mm:00000000fe4101cb type:MM_FILEPAGES val:33 [ 44.877088] BUG: Bad rss-counter state mm:00000000fe4101cb type:MM_ANONPAGES val:22 [ 45.431380] BUG: Bad rss-counter state mm:00000000597615fe type:MM_FILEPAGES val:33 [ 45.432835] BUG: Bad rss-counter state mm:00000000597615fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2087' (ECDSA) to the list of known hosts. 2023/06/19 18:55:11 fuzzer started 2023/06/19 18:55:11 dialing manager at localhost:44161 2023/06/19 18:55:11 checking machine... 2023/06/19 18:55:11 checking revisions... [ 46.059939] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:55:11 testing simple program... [ 46.103646] cgroup: Unknown subsys name 'net' [ 46.158695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:00 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=00007fa95f82a920 CR3=0000000009b1e000 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=2030313a35353a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffd691c93 RBX=ffffffff85fa2f74 RCX=ffffffff83634c3f RDX=0000000000000000 RSI=ffffffff863b0d30 RDI=ffffffff85fa2f6c RBP=ffffffff85fa2f6c RSP=ffff88806cf099b8 R8 =ffffffff863b0d30 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008a6e6 R12=ffffffff85fa2f7c R13=ffffffff85fa2f6c R14=ffffffff85fa2f6c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f6616ff0900 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=00007ffece605000 CR3=0000000015b14000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000