syzkaller login: [ 37.821003] BUG: Bad rss-counter state mm:000000004db65669 type:MM_FILEPAGES val:33 [ 37.822570] BUG: Bad rss-counter state mm:000000004db65669 type:MM_ANONPAGES val:22 [ 37.975183] ================================================================== [ 37.976313] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.977259] Read of size 8 at addr ffff888016948ed8 by task sshd/220 [ 37.978162] [ 37.978380] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.979242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.980262] Call Trace: [ 37.980590] [ 37.980874] dump_stack_lvl+0x91/0xf0 [ 37.981362] print_report+0xcc/0x620 [ 37.981844] ? __virt_addr_valid+0x102/0x340 [ 37.982404] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.983028] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.983653] kasan_report+0xbe/0xf0 [ 37.984149] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.984767] vma_interval_tree_remove+0xc75/0xec0 [ 37.985382] vma_prepare+0xc54/0x11a0 [ 37.985865] __split_vma+0x5af/0x950 [ 37.986342] ? __pfx___split_vma+0x10/0x10 [ 37.986876] ? find_held_lock+0x2c/0x110 [ 37.987400] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.987988] ? lock_is_held_type+0x9f/0x120 [ 37.988540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.989146] ? mtree_range_walk+0x632/0x900 [ 37.989702] ? mas_walk+0x5c7/0x7c0 [ 37.990175] do_vmi_munmap+0x1f1/0x2b0 [ 37.990666] mmap_region+0x1f9/0x2660 [ 37.991154] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.991666] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.992401] ? __pfx_lock_acquire+0x10/0x10 [ 37.992942] ? __pfx_mmap_region+0x10/0x10 [ 37.993471] ? security_mmap_addr+0x7d/0xa0 [ 37.994007] ? get_unmapped_area+0x1f5/0x3f0 [ 37.994560] do_mmap+0x854/0xf00 [ 37.994996] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.995488] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.996053] ksys_mmap_pgoff+0x3af/0x500 [ 37.996591] do_syscall_64+0x3f/0x90 [ 37.997066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.997719] RIP: 0033:0x7f0e66738d82 [ 37.998179] 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 [ 38.000328] RSP: 002b:00007ffce43b5178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.001234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e66738d82 [ 38.002086] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e65b72000 [ 38.002941] RBP: 00007f0e65b72000 R08: 0000000000000009 R09: 0000000000001000 [ 38.003792] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f76d20fd90 [ 38.004662] R13: 00007ffce43b5190 R14: 00007ffce43b51c0 R15: 00007ffce43b5520 [ 38.005538] [ 38.005836] [ 38.006052] Allocated by task 213: [ 38.006483] kasan_save_stack+0x22/0x50 [ 38.006998] kasan_set_track+0x25/0x30 [ 38.007498] __kasan_slab_alloc+0x59/0x70 [ 38.008023] kmem_cache_alloc+0x16b/0x370 [ 38.008558] vm_area_dup+0x20/0x160 [ 38.009016] __split_vma+0x170/0x950 [ 38.009487] split_vma+0xc6/0x110 [ 38.009925] mprotect_fixup+0x8d2/0xb30 [ 38.010421] do_mprotect_pkey+0x87e/0xd40 [ 38.010947] __x64_sys_mprotect+0x78/0xc0 [ 38.011464] do_syscall_64+0x3f/0x90 [ 38.011940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.012606] [ 38.012823] Freed by task 213: [ 38.013218] kasan_save_stack+0x22/0x50 [ 38.013732] kasan_set_track+0x25/0x30 [ 38.014232] kasan_save_free_info+0x2b/0x50 [ 38.014770] __kasan_slab_free+0x10a/0x190 [ 38.015307] kmem_cache_free+0x10d/0x4d0 [ 38.015814] rcu_core+0x8c8/0x2860 [ 38.016293] __do_softirq+0x1b7/0x7d4 [ 38.016775] [ 38.016990] Last potentially related work creation: [ 38.017584] kasan_save_stack+0x22/0x50 [ 38.018089] __kasan_record_aux_stack+0x8e/0xa0 [ 38.018668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.019315] remove_vma+0x139/0x170 [ 38.019769] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.020340] do_vmi_munmap+0x1f1/0x2b0 [ 38.020835] __vm_munmap+0x138/0x3a0 [ 38.021300] __x64_sys_munmap+0x59/0x80 [ 38.021805] do_syscall_64+0x3f/0x90 [ 38.022283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.022922] [ 38.023138] The buggy address belongs to the object at ffff888016948e80 [ 38.023138] which belongs to the cache vm_area_struct of size 168 [ 38.024616] The buggy address is located 88 bytes inside of [ 38.024616] freed 168-byte region [ffff888016948e80, ffff888016948f28) [ 38.026025] [ 38.026247] The buggy address belongs to the physical page: [ 38.026908] page:00000000d383e643 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16948 [ 38.027998] memcg:ffff88801038f801 [ 38.028443] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.029085] page_type: 0xffffffff() [ 38.029543] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.030462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801038f801 [ 38.031375] page dumped because: kasan: bad access detected [ 38.032041] [ 38.032265] Memory state around the buggy address: [ 38.032848] ffff888016948d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.033700] ffff888016948e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.034563] >ffff888016948e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.035471] ^ [ 38.036258] ffff888016948f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.037166] ffff888016948f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.038076] ================================================================== [ 38.039188] Disabling lock debugging due to kernel taint [ 40.517123] BUG: Bad rss-counter state mm:00000000b412f696 type:MM_FILEPAGES val:33 [ 40.518140] BUG: Bad rss-counter state mm:00000000b412f696 type:MM_ANONPAGES val:22 [ 41.068650] BUG: Bad rss-counter state mm:00000000df4f53d1 type:MM_FILEPAGES val:33 [ 41.069641] BUG: Bad rss-counter state mm:00000000df4f53d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32442' (ECDSA) to the list of known hosts. 2023/06/19 16:17:20 fuzzer started 2023/06/19 16:17:20 dialing manager at localhost:44161 2023/06/19 16:17:20 checking machine... 2023/06/19 16:17:20 checking revisions... [ 41.725885] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:17:20 testing simple program... [ 41.777016] cgroup: Unknown subsys name 'net' [ 41.838002] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:17:12 Registers: info registers vcpu 0 RAX=1ffff110012fd439 RBX=ffff8880097ea198 RCX=1ffff11001cec590 RDX=dffffc0000000000 RSI=ffff88800ea0d900 RDI=ffff8880097ea1c8 RBP=ffff88800e762c50 RSP=ffff888015d07380 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800ea0d800 R13=0000000000000000 R14=ffff88801a614768 R15=ffff88801a614720 RIP=ffffffff818474fe 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 00007f80c5a5b900 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=00007f80c5a3a020 CR3=000000000de7c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fd88b7735e0 CR3=000000000ca70000 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=2039313a37313a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a37313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000