syzkaller login: [ 59.816762] BUG: Bad rss-counter state mm:000000005c6d9430 type:MM_FILEPAGES val:33 [ 59.818617] BUG: Bad rss-counter state mm:000000005c6d9430 type:MM_ANONPAGES val:22 [ 59.978448] ================================================================== [ 59.979313] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.980197] Read of size 8 at addr ffff88800b9a4140 by task sshd/222 [ 59.980917] [ 59.981125] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.982085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.983001] Call Trace: [ 59.983301] [ 59.983570] dump_stack_lvl+0x91/0xf0 [ 59.984060] print_report+0xcc/0x620 [ 59.984534] ? __virt_addr_valid+0x102/0x340 [ 59.985059] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.985640] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.986221] kasan_report+0xbe/0xf0 [ 59.986668] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.987259] vma_interval_tree_remove+0xc75/0xec0 [ 59.987833] vma_prepare+0xc54/0x11a0 [ 59.988289] __split_vma+0x5af/0x950 [ 59.988755] ? __pfx___split_vma+0x10/0x10 [ 59.989286] ? find_held_lock+0x2c/0x110 [ 59.989799] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.990350] ? lock_is_held_type+0x9f/0x120 [ 59.990881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.991478] ? mtree_range_walk+0x632/0x900 [ 59.992039] ? mas_walk+0x5c7/0x7c0 [ 59.992507] do_vmi_munmap+0x1f1/0x2b0 [ 59.993005] mmap_region+0x1f9/0x2660 [ 59.993478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.993985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.994693] ? __pfx_lock_acquire+0x10/0x10 [ 59.995226] ? __pfx_mmap_region+0x10/0x10 [ 59.995746] ? security_mmap_addr+0x7d/0xa0 [ 59.996286] ? get_unmapped_area+0x1f5/0x3f0 [ 59.996836] do_mmap+0x854/0xf00 [ 59.997279] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.997769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.998320] ksys_mmap_pgoff+0x3af/0x500 [ 59.998838] do_syscall_64+0x3f/0x90 [ 59.999317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.999973] RIP: 0033:0x7f0652bd6d82 [ 60.000421] 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 [ 60.002521] RSP: 002b:00007ffe88c44978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.003428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0652bd6d82 [ 60.004296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0652010000 [ 60.005147] RBP: 00007f0652010000 R08: 0000000000000009 R09: 0000000000001000 [ 60.005979] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0e0531f70 [ 60.006796] R13: 00007ffe88c44990 R14: 00007ffe88c449c0 R15: 00007ffe88c44d20 [ 60.007625] [ 60.007932] [ 60.008150] Allocated by task 215: [ 60.008574] kasan_save_stack+0x22/0x50 [ 60.009080] kasan_set_track+0x25/0x30 [ 60.009563] __kasan_slab_alloc+0x59/0x70 [ 60.010085] kmem_cache_alloc+0x16b/0x370 [ 60.010594] vm_area_dup+0x20/0x160 [ 60.011038] __split_vma+0x170/0x950 [ 60.011504] split_vma+0xc6/0x110 [ 60.011941] mprotect_fixup+0x8d2/0xb30 [ 60.012434] do_mprotect_pkey+0x87e/0xd40 [ 60.012955] __x64_sys_mprotect+0x78/0xc0 [ 60.013464] do_syscall_64+0x3f/0x90 [ 60.013926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.014562] [ 60.014778] Freed by task 19: [ 60.015158] kasan_save_stack+0x22/0x50 [ 60.015651] kasan_set_track+0x25/0x30 [ 60.016152] kasan_save_free_info+0x2b/0x50 [ 60.016683] __kasan_slab_free+0x10a/0x190 [ 60.017223] kmem_cache_free+0x10d/0x4d0 [ 60.017738] rcu_core+0x8c8/0x2860 [ 60.018184] __do_softirq+0x1b7/0x7d4 [ 60.018655] [ 60.018870] Last potentially related work creation: [ 60.019443] kasan_save_stack+0x22/0x50 [ 60.019957] __kasan_record_aux_stack+0x8e/0xa0 [ 60.020541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.021179] remove_vma+0x139/0x170 [ 60.021629] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.022176] do_vmi_munmap+0x1f1/0x2b0 [ 60.022657] __vm_munmap+0x138/0x3a0 [ 60.023197] __x64_sys_munmap+0x59/0x80 [ 60.023683] do_syscall_64+0x3f/0x90 [ 60.024175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.024814] [ 60.025023] The buggy address belongs to the object at ffff88800b9a40e8 [ 60.025023] which belongs to the cache vm_area_struct of size 168 [ 60.026481] The buggy address is located 88 bytes inside of [ 60.026481] freed 168-byte region [ffff88800b9a40e8, ffff88800b9a4190) [ 60.027878] [ 60.028090] The buggy address belongs to the physical page: [ 60.028751] page:00000000154ce91b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb9a4 [ 60.029830] memcg:ffff888018060901 [ 60.030246] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.030893] page_type: 0xffffffff() [ 60.031334] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.032246] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018060901 [ 60.033144] page dumped because: kasan: bad access detected [ 60.033796] [ 60.034007] Memory state around the buggy address: [ 60.034583] ffff88800b9a4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.035446] ffff88800b9a4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 60.036311] >ffff88800b9a4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.037155] ^ [ 60.037787] ffff88800b9a4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 60.038633] ffff88800b9a4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 60.039476] ================================================================== [ 60.040404] Disabling lock debugging due to kernel taint [ 62.686883] BUG: Bad rss-counter state mm:000000002219435f type:MM_FILEPAGES val:33 [ 62.687947] BUG: Bad rss-counter state mm:000000002219435f type:MM_ANONPAGES val:22 [ 63.113017] BUG: Bad rss-counter state mm:0000000003b6d35e type:MM_FILEPAGES val:33 [ 63.113838] BUG: Bad rss-counter state mm:0000000003b6d35e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10964' (ECDSA) to the list of known hosts. 2023/06/20 20:39:18 fuzzer started 2023/06/20 20:39:18 dialing manager at localhost:36067 2023/06/20 20:39:18 checking machine... 2023/06/20 20:39:18 checking revisions... [ 63.693881] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:39:18 testing simple program... [ 63.739430] cgroup: Unknown subsys name 'net' [ 63.773264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:39:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016db79e8 RCX=0000000000000001 RDX=1ffff11002db6f48 RSI=ffff888016db7f18 RDI=ffff888016db79e8 RBP=ffff888016db7a40 RSP=ffff888016db79d0 R8 =0000000000000001 R9 =ffff888016db7a28 R10=0000000000038001 R11=0000000000010484 R12=ffff888016db7ab0 R13=0000000000000000 R14=ffff88801a0751c0 R15=ffff888019803480 RIP=ffffffff8113038e 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 00007f4e8a21b900 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=00007ffef98e2000 CR3=0000000016c9a000 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=563412feff00545000000000000080fe 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86139744 RDX=1ffff110011c6f3c RSI=1ffff110011c6f3a RDI=ffff888008e379e0 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff86139748 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37ce8 R15=ffff888008e37978 RIP=ffffffff811310f5 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 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=00007f496b3f2420 CR3=000000000c4fa000 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=00000000000000000000000000000000 XMM01=2c96dc7eeb2f07ae8e45d139ec08cbe2 XMM02=000000000011a6e0eff9b2d0a8fce9cb XMM03=000000000011a7b02c67c8bc2e329bc3 XMM04=56df952d1d60fc4b00000000000ae988 XMM05=59d5b690e0af863b0000000000131fa8 XMM06=00c3ffa147b8d8570000000000131e30 XMM07=e042d86d42eb936e0000000000122350 XMM08=05dd21e23ab3475b000000000011a7b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000