syzkaller login: [ 30.073046] BUG: Bad rss-counter state mm:0000000094cd49a2 type:MM_FILEPAGES val:33 [ 30.074145] BUG: Bad rss-counter state mm:0000000094cd49a2 type:MM_ANONPAGES val:22 [ 30.242704] ================================================================== [ 30.243638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.244600] Read of size 8 at addr ffff888018b02310 by task sshd/220 [ 30.245443] [ 30.245667] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.246567] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.247576] Call Trace: [ 30.247901] [ 30.248200] dump_stack_lvl+0x91/0xf0 [ 30.248704] print_report+0xcc/0x620 [ 30.249208] ? __virt_addr_valid+0x102/0x340 [ 30.249807] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.250435] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251065] kasan_report+0xbe/0xf0 [ 30.251548] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.252189] vma_interval_tree_remove+0xc75/0xec0 [ 30.252803] vma_prepare+0xc54/0x11a0 [ 30.253295] __split_vma+0x5af/0x950 [ 30.253787] ? __pfx___split_vma+0x10/0x10 [ 30.254330] ? find_held_lock+0x2c/0x110 [ 30.254859] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.255426] ? lock_is_held_type+0x9f/0x120 [ 30.255966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.256583] ? mtree_range_walk+0x632/0x900 [ 30.257146] ? mas_walk+0x5c7/0x7c0 [ 30.257631] do_vmi_munmap+0x1f1/0x2b0 [ 30.258158] mmap_region+0x1f9/0x2660 [ 30.258641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.259161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.259893] ? __pfx_lock_acquire+0x10/0x10 [ 30.260426] ? __pfx_mmap_region+0x10/0x10 [ 30.260968] ? security_mmap_addr+0x7d/0xa0 [ 30.261505] ? get_unmapped_area+0x1f5/0x3f0 [ 30.262081] do_mmap+0x854/0xf00 [ 30.262527] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.263028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.263598] ksys_mmap_pgoff+0x3af/0x500 [ 30.264115] do_syscall_64+0x3f/0x90 [ 30.264600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.265260] RIP: 0033:0x7f8fd0098d82 [ 30.265745] 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 [ 30.267892] RSP: 002b:00007ffdbcbe6e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.268811] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fd0098d82 [ 30.269669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fcf4d2000 [ 30.270547] RBP: 00007f8fcf4d2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.271410] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b3b093d90 [ 30.272268] R13: 00007ffdbcbe6e80 R14: 00007ffdbcbe6eb0 R15: 00007ffdbcbe7210 [ 30.273132] [ 30.273428] [ 30.273648] Allocated by task 213: [ 30.274100] kasan_save_stack+0x22/0x50 [ 30.274611] kasan_set_track+0x25/0x30 [ 30.275115] __kasan_slab_alloc+0x59/0x70 [ 30.275646] kmem_cache_alloc+0x16b/0x370 [ 30.276171] vm_area_dup+0x20/0x160 [ 30.276631] __split_vma+0x170/0x950 [ 30.277104] split_vma+0xc6/0x110 [ 30.277554] mprotect_fixup+0x8d2/0xb30 [ 30.278089] do_mprotect_pkey+0x87e/0xd40 [ 30.278621] __x64_sys_mprotect+0x78/0xc0 [ 30.279150] do_syscall_64+0x3f/0x90 [ 30.279630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.280276] [ 30.280492] Freed by task 213: [ 30.280894] kasan_save_stack+0x22/0x50 [ 30.281401] kasan_set_track+0x25/0x30 [ 30.281906] kasan_save_free_info+0x2b/0x50 [ 30.282444] __kasan_slab_free+0x10a/0x190 [ 30.282985] kmem_cache_free+0x10d/0x4d0 [ 30.283501] rcu_core+0x8c8/0x2860 [ 30.283960] __do_softirq+0x1b7/0x7d4 [ 30.284449] [ 30.284666] Last potentially related work creation: [ 30.285252] kasan_save_stack+0x22/0x50 [ 30.285775] __kasan_record_aux_stack+0x8e/0xa0 [ 30.286362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.287017] remove_vma+0x139/0x170 [ 30.287484] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.288053] do_vmi_munmap+0x1f1/0x2b0 [ 30.288545] __vm_munmap+0x138/0x3a0 [ 30.289026] __x64_sys_munmap+0x59/0x80 [ 30.289530] do_syscall_64+0x3f/0x90 [ 30.290026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290680] [ 30.290898] The buggy address belongs to the object at ffff888018b022b8 [ 30.290898] which belongs to the cache vm_area_struct of size 168 [ 30.292384] The buggy address is located 88 bytes inside of [ 30.292384] freed 168-byte region [ffff888018b022b8, ffff888018b02360) [ 30.293842] [ 30.294060] The buggy address belongs to the physical page: [ 30.294726] page:0000000046b64f01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18b02 [ 30.295824] memcg:ffff88800df4f401 [ 30.296258] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.296907] page_type: 0xffffffff() [ 30.297359] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.298301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df4f401 [ 30.299222] page dumped because: kasan: bad access detected [ 30.299885] [ 30.300112] Memory state around the buggy address: [ 30.300696] ffff888018b02200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.301561] ffff888018b02280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.302430] >ffff888018b02300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.303282] ^ [ 30.303752] ffff888018b02380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.304617] ffff888018b02400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.305475] ================================================================== [ 30.306503] Disabling lock debugging due to kernel taint [ 32.215390] BUG: Bad rss-counter state mm:00000000fa26b057 type:MM_FILEPAGES val:33 [ 32.216526] BUG: Bad rss-counter state mm:00000000fa26b057 type:MM_ANONPAGES val:22 [ 32.699444] BUG: Bad rss-counter state mm:000000009e65bd1f type:MM_FILEPAGES val:33 [ 32.700595] BUG: Bad rss-counter state mm:000000009e65bd1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12453' (ECDSA) to the list of known hosts. 2023/06/21 08:35:59 fuzzer started 2023/06/21 08:35:59 dialing manager at localhost:36067 2023/06/21 08:35:59 checking machine... 2023/06/21 08:35:59 checking revisions... [ 33.331466] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:35:59 testing simple program... [ 33.379756] cgroup: Unknown subsys name 'net' [ 33.432838] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:35:59 Registers: info registers vcpu 0 RAX=1ffff11001c50439 RBX=ffff88800e282198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e2821c8 RBP=ffff88800d837228 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800d837678 R14=ffffffff813782f8 R15=ffff88800d837678 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f89ea14e900 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=00007f89ea7060b0 CR3=0000000016422000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe9b6f86e8 CR3=000000000ec20000 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=2038353a35333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a35333a3830203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000