syzkaller login: [ 26.410601] BUG: Bad rss-counter state mm:000000001489c27d type:MM_FILEPAGES val:33 [ 26.411605] BUG: Bad rss-counter state mm:000000001489c27d type:MM_ANONPAGES val:22 [ 26.577215] ================================================================== [ 26.578287] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.579406] Read of size 8 at addr ffff88800e2854e0 by task sshd/221 [ 26.580457] [ 26.580683] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.581555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.582543] Call Trace: [ 26.582864] [ 26.583148] dump_stack_lvl+0x91/0xf0 [ 26.583639] print_report+0xcc/0x620 [ 26.584130] ? __virt_addr_valid+0x102/0x340 [ 26.584685] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.585298] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.585916] kasan_report+0xbe/0xf0 [ 26.586403] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.587019] vma_interval_tree_remove+0xc75/0xec0 [ 26.587622] vma_prepare+0xc54/0x11a0 [ 26.588098] __split_vma+0x5af/0x950 [ 26.588587] ? __pfx___split_vma+0x10/0x10 [ 26.589118] ? find_held_lock+0x2c/0x110 [ 26.589643] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.590212] ? lock_is_held_type+0x9f/0x120 [ 26.590746] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.591357] ? mtree_range_walk+0x632/0x900 [ 26.591901] ? mas_walk+0x5c7/0x7c0 [ 26.592374] do_vmi_munmap+0x1f1/0x2b0 [ 26.592870] mmap_region+0x1f9/0x2660 [ 26.593356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.593862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.594575] ? __pfx_lock_acquire+0x10/0x10 [ 26.595103] ? __pfx_mmap_region+0x10/0x10 [ 26.595630] ? security_mmap_addr+0x7d/0xa0 [ 26.596159] ? get_unmapped_area+0x1f5/0x3f0 [ 26.596725] do_mmap+0x854/0xf00 [ 26.597162] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.597648] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.598210] ksys_mmap_pgoff+0x3af/0x500 [ 26.598715] do_syscall_64+0x3f/0x90 [ 26.599188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.599834] RIP: 0033:0x7f9a130b1d82 [ 26.600284] 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 [ 26.602433] RSP: 002b:00007ffc67d13a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.603372] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a130b1d82 [ 26.604249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a124eb000 [ 26.605159] RBP: 00007f9a124eb000 R08: 0000000000000009 R09: 0000000000001000 [ 26.606137] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a053a1ec0 [ 26.607105] R13: 00007ffc67d13a70 R14: 00007ffc67d13aa0 R15: 00007ffc67d13e00 [ 26.608088] [ 26.608428] [ 26.608690] Allocated by task 214: [ 26.609186] kasan_save_stack+0x22/0x50 [ 26.609765] kasan_set_track+0x25/0x30 [ 26.610338] __kasan_slab_alloc+0x59/0x70 [ 26.610945] kmem_cache_alloc+0x16b/0x370 [ 26.611536] vm_area_dup+0x20/0x160 [ 26.612066] __split_vma+0x170/0x950 [ 26.612615] split_vma+0xc6/0x110 [ 26.613125] mprotect_fixup+0x8d2/0xb30 [ 26.613698] do_mprotect_pkey+0x87e/0xd40 [ 26.614296] __x64_sys_mprotect+0x78/0xc0 [ 26.614898] do_syscall_64+0x3f/0x90 [ 26.615444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.616182] [ 26.616429] Freed by task 214: [ 26.616888] kasan_save_stack+0x22/0x50 [ 26.617463] kasan_set_track+0x25/0x30 [ 26.618032] kasan_save_free_info+0x2b/0x50 [ 26.618638] __kasan_slab_free+0x10a/0x190 [ 26.619245] kmem_cache_free+0x10d/0x4d0 [ 26.619822] rcu_core+0x8c8/0x2860 [ 26.620330] __do_softirq+0x1b7/0x7d4 [ 26.620896] [ 26.621144] Last potentially related work creation: [ 26.621902] kasan_save_stack+0x22/0x50 [ 26.622475] __kasan_record_aux_stack+0x8e/0xa0 [ 26.623127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.623864] remove_vma+0x139/0x170 [ 26.624383] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.625042] do_vmi_munmap+0x1f1/0x2b0 [ 26.625608] __vm_munmap+0x138/0x3a0 [ 26.626147] __x64_sys_munmap+0x59/0x80 [ 26.626713] do_syscall_64+0x3f/0x90 [ 26.627253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.627989] [ 26.628236] Second to last potentially related work creation: [ 26.629027] kasan_save_stack+0x22/0x50 [ 26.629597] __kasan_record_aux_stack+0x8e/0xa0 [ 26.630256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.630984] remove_vma+0x139/0x170 [ 26.631497] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.632136] do_vmi_munmap+0x1f1/0x2b0 [ 26.632713] mmap_region+0x1f9/0x2660 [ 26.633255] do_mmap+0x854/0xf00 [ 26.633747] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.634310] ksys_mmap_pgoff+0x3af/0x500 [ 26.634891] do_syscall_64+0x3f/0x90 [ 26.635432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.636173] [ 26.636418] The buggy address belongs to the object at ffff88800e285488 [ 26.636418] which belongs to the cache vm_area_struct of size 168 [ 26.638131] The buggy address is located 88 bytes inside of [ 26.638131] freed 168-byte region [ffff88800e285488, ffff88800e285530) [ 26.639679] [ 26.639920] The buggy address belongs to the physical page: [ 26.640654] page:00000000338b6a55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe285 [ 26.641859] memcg:ffff88800dfafd01 [ 26.642335] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.643048] page_type: 0xffffffff() [ 26.643558] raw: 0100000000000200 ffff88800879fc80 ffffea00003548c0 dead000000000006 [ 26.644591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfafd01 [ 26.645593] page dumped because: kasan: bad access detected [ 26.646322] [ 26.646562] Memory state around the buggy address: [ 26.647209] ffff88800e285380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 26.648177] ffff88800e285400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.649150] >ffff88800e285480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.650112] ^ [ 26.650966] ffff88800e285500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 26.651946] ffff88800e285580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.652925] ================================================================== [ 26.653991] Disabling lock debugging due to kernel taint [ 28.661875] BUG: Bad rss-counter state mm:000000002f8563c4 type:MM_FILEPAGES val:33 [ 28.662686] BUG: Bad rss-counter state mm:000000002f8563c4 type:MM_ANONPAGES val:22 [ 29.193901] BUG: Bad rss-counter state mm:00000000b22e3c66 type:MM_FILEPAGES val:33 [ 29.195073] BUG: Bad rss-counter state mm:00000000b22e3c66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10738' (ECDSA) to the list of known hosts. 2023/06/19 12:01:19 fuzzer started 2023/06/19 12:01:20 dialing manager at localhost:44161 2023/06/19 12:01:20 checking machine... 2023/06/19 12:01:20 checking revisions... [ 29.853659] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:01:20 testing simple program... [ 29.899731] cgroup: Unknown subsys name 'net' [ 29.950356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:01:17 Registers: info registers vcpu 0 RAX=ffffffff863b2b5f RBX=0000000000000001 RCX=ffffffff863b2b5a RDX=0000000000000000 RSI=1ffffffff0c7656b RDI=ffffffff85fa4388 RBP=ffff88800fca7448 RSP=ffff88800fca7380 R8 =ffffffff863b2b5a R9 =ffff88800fca7430 R10=0000000000038001 R11=000000000008abed R12=ffff88800fca7450 R13=ffff88800fca7438 R14=ffff88800fca7431 R15=ffff88800fca73f0 RIP=ffffffff81130a5b RFL=00000213 [----A-C] 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 00007f294027c900 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=00007ffdf5b61000 CR3=00000000164c0000 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=ffff888008c58400 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=00007f84ee27e0f0 CR3=0000000015df8000 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=2039313a31303a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a31303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000