syzkaller login: [ 38.686926] BUG: Bad rss-counter state mm:000000002ebf1c9c type:MM_FILEPAGES val:33 [ 38.688206] BUG: Bad rss-counter state mm:000000002ebf1c9c type:MM_ANONPAGES val:22 [ 38.831760] ================================================================== [ 38.832813] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.833931] Read of size 8 at addr ffff888018397df0 by task sshd/225 [ 38.834827] [ 38.835040] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.835882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.836851] Call Trace: [ 38.837172] [ 38.837448] dump_stack_lvl+0x91/0xf0 [ 38.837922] print_report+0xcc/0x620 [ 38.838395] ? __virt_addr_valid+0x102/0x340 [ 38.838933] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.839554] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.840163] kasan_report+0xbe/0xf0 [ 38.840639] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.841265] vma_interval_tree_remove+0xc75/0xec0 [ 38.841864] vma_prepare+0xc54/0x11a0 [ 38.842338] __split_vma+0x5af/0x950 [ 38.842805] ? __pfx___split_vma+0x10/0x10 [ 38.843328] ? find_held_lock+0x2c/0x110 [ 38.843841] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.844398] ? lock_is_held_type+0x9f/0x120 [ 38.844949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.845543] ? mtree_range_walk+0x632/0x900 [ 38.846229] ? mas_walk+0x5c7/0x7c0 [ 38.846719] do_vmi_munmap+0x1f1/0x2b0 [ 38.847216] mmap_region+0x1f9/0x2660 [ 38.847705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.848227] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.848960] ? __pfx_lock_acquire+0x10/0x10 [ 38.849516] ? __pfx_mmap_region+0x10/0x10 [ 38.850052] ? security_mmap_addr+0x7d/0xa0 [ 38.850584] ? get_unmapped_area+0x1f5/0x3f0 [ 38.851140] do_mmap+0x854/0xf00 [ 38.851579] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.852081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.852645] ksys_mmap_pgoff+0x3af/0x500 [ 38.853181] do_syscall_64+0x3f/0x90 [ 38.853657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854308] RIP: 0033:0x7f0695c54d82 [ 38.854765] 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 [ 38.856917] RSP: 002b:00007ffe5f7dca98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.857828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0695c54d82 [ 38.858691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f069508e000 [ 38.859547] RBP: 00007f069508e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.860399] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ab4c61f60 [ 38.861254] R13: 00007ffe5f7dcab0 R14: 00007ffe5f7dcae0 R15: 00007ffe5f7dce40 [ 38.862116] [ 38.862410] [ 38.862624] Allocated by task 218: [ 38.863169] kasan_save_stack+0x22/0x50 [ 38.863661] kasan_set_track+0x25/0x30 [ 38.864144] __kasan_slab_alloc+0x59/0x70 [ 38.864656] kmem_cache_alloc+0x16b/0x370 [ 38.865178] vm_area_dup+0x20/0x160 [ 38.865622] __split_vma+0x170/0x950 [ 38.866074] split_vma+0xc6/0x110 [ 38.866504] mprotect_fixup+0x8d2/0xb30 [ 38.866991] do_mprotect_pkey+0x87e/0xd40 [ 38.867499] __x64_sys_mprotect+0x78/0xc0 [ 38.868008] do_syscall_64+0x3f/0x90 [ 38.868468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.869101] [ 38.869311] Freed by task 218: [ 38.869691] kasan_save_stack+0x22/0x50 [ 38.870180] kasan_set_track+0x25/0x30 [ 38.870666] kasan_save_free_info+0x2b/0x50 [ 38.871181] __kasan_slab_free+0x10a/0x190 [ 38.871704] kmem_cache_free+0x10d/0x4d0 [ 38.872197] rcu_core+0x8c8/0x2860 [ 38.872627] __do_softirq+0x1b7/0x7d4 [ 38.873098] [ 38.873312] Last potentially related work creation: [ 38.873880] kasan_save_stack+0x22/0x50 [ 38.874367] __kasan_record_aux_stack+0x8e/0xa0 [ 38.874925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.875548] remove_vma+0x139/0x170 [ 38.875988] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.876529] do_vmi_munmap+0x1f1/0x2b0 [ 38.877017] __vm_munmap+0x138/0x3a0 [ 38.877477] __x64_sys_munmap+0x59/0x80 [ 38.877975] do_syscall_64+0x3f/0x90 [ 38.878442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.879080] [ 38.879294] The buggy address belongs to the object at ffff888018397d98 [ 38.879294] which belongs to the cache vm_area_struct of size 168 [ 38.880738] The buggy address is located 88 bytes inside of [ 38.880738] freed 168-byte region [ffff888018397d98, ffff888018397e40) [ 38.882136] [ 38.882348] The buggy address belongs to the physical page: [ 38.883008] page:000000003dcda09c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18397 [ 38.884089] memcg:ffff888018016b01 [ 38.884509] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.885160] page_type: 0xffffffff() [ 38.885608] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.886523] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018016b01 [ 38.887416] page dumped because: kasan: bad access detected [ 38.888064] [ 38.888279] Memory state around the buggy address: [ 38.888852] ffff888018397c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.889697] ffff888018397d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.890549] >ffff888018397d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.891393] ^ [ 38.892197] ffff888018397e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.893053] ffff888018397e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.893896] ================================================================== [ 38.894897] Disabling lock debugging due to kernel taint [ 40.716310] BUG: Bad rss-counter state mm:00000000c68030e5 type:MM_FILEPAGES val:33 [ 40.717439] BUG: Bad rss-counter state mm:00000000c68030e5 type:MM_ANONPAGES val:22 [ 41.164136] BUG: Bad rss-counter state mm:000000009d3ce215 type:MM_FILEPAGES val:33 [ 41.165380] BUG: Bad rss-counter state mm:000000009d3ce215 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40091' (ECDSA) to the list of known hosts. 2023/06/20 16:32:57 fuzzer started 2023/06/20 16:32:58 dialing manager at localhost:36067 2023/06/20 16:32:58 checking machine... 2023/06/20 16:32:58 checking revisions... [ 41.756429] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:32:58 testing simple program... [ 41.811744] cgroup: Unknown subsys name 'net' [ 41.849203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:32:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffe9485db8 CR3=0000000005482000 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=00007fd47e091510000055720eb49790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000008000 RCX=ffffffff81b2b195 RDX=1ffff1100325800a RSI=0000000000000008 RDI=ffff8880192c0050 RBP=ffff8880192c02b0 RSP=ffff88801648f740 R8 =0000000000000000 R9 =ffffed100325800a R10=ffff8880192c0057 R11=00000000000b6a61 R12=ffff88801591dd00 R13=ffff8880192c0040 R14=ffff8880192c0050 R15=0000000000000000 RIP=ffffffff81b2b1aa 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 00007f7b4ad02700 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=00007fa9b029c8f0 CR3=0000000019fec000 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=2037353a32333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000