syzkaller login: [ 30.299849] BUG: Bad rss-counter state mm:00000000fa8de938 type:MM_FILEPAGES val:33 [ 30.301080] BUG: Bad rss-counter state mm:00000000fa8de938 type:MM_ANONPAGES val:22 [ 30.340058] ================================================================== [ 30.341449] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.342941] Read of size 8 at addr ffff88800e885a50 by task sshd/219 [ 30.344103] [ 30.344438] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.345692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.347308] Call Trace: [ 30.347731] [ 30.348145] dump_stack_lvl+0x91/0xf0 [ 30.348695] print_report+0xcc/0x620 [ 30.349410] ? __virt_addr_valid+0x102/0x340 [ 30.350088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.350807] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.351540] kasan_report+0xbe/0xf0 [ 30.352268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.353002] vma_interval_tree_remove+0xc75/0xec0 [ 30.353900] vma_prepare+0xc54/0x11a0 [ 30.354538] __split_vma+0x5af/0x950 [ 30.355137] ? __pfx___split_vma+0x10/0x10 [ 30.355756] ? find_held_lock+0x2c/0x110 [ 30.356356] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.357091] ? lock_is_held_type+0x9f/0x120 [ 30.357837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.358548] ? mtree_range_walk+0x632/0x900 [ 30.359167] ? mas_walk+0x5c7/0x7c0 [ 30.359703] do_vmi_munmap+0x1f1/0x2b0 [ 30.360260] mmap_region+0x1f9/0x2660 [ 30.360815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.361388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.362182] ? __pfx_lock_acquire+0x10/0x10 [ 30.362784] ? __pfx_mmap_region+0x10/0x10 [ 30.363392] ? security_mmap_addr+0x7d/0xa0 [ 30.363979] ? get_unmapped_area+0x1f5/0x3f0 [ 30.364619] do_mmap+0x854/0xf00 [ 30.365129] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.365700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.366349] ksys_mmap_pgoff+0x3af/0x500 [ 30.366949] do_syscall_64+0x3f/0x90 [ 30.367489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.368458] RIP: 0033:0x7fc3fea58d82 [ 30.368978] 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 [ 30.371390] RSP: 002b:00007ffdad079f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.372405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3fea58d82 [ 30.373353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3fde92000 [ 30.374299] RBP: 00007fc3fde92000 R08: 0000000000000009 R09: 0000000000001000 [ 30.375262] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598b4e0cf60 [ 30.376217] R13: 00007ffdad079fb0 R14: 00007ffdad079fe0 R15: 00007ffdad07a340 [ 30.377184] [ 30.377515] [ 30.377753] Allocated by task 212: [ 30.378235] kasan_save_stack+0x22/0x50 [ 30.378827] kasan_set_track+0x25/0x30 [ 30.379379] __kasan_slab_alloc+0x59/0x70 [ 30.379966] kmem_cache_alloc+0x16b/0x370 [ 30.380543] vm_area_dup+0x20/0x160 [ 30.381051] __split_vma+0x170/0x950 [ 30.381569] split_vma+0xc6/0x110 [ 30.382058] mprotect_fixup+0x8d2/0xb30 [ 30.382627] do_mprotect_pkey+0x87e/0xd40 [ 30.383212] __x64_sys_mprotect+0x78/0xc0 [ 30.383801] do_syscall_64+0x3f/0x90 [ 30.384339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.385059] [ 30.385304] Freed by task 19: [ 30.385737] kasan_save_stack+0x22/0x50 [ 30.386297] kasan_set_track+0x25/0x30 [ 30.386875] kasan_save_free_info+0x2b/0x50 [ 30.387471] __kasan_slab_free+0x10a/0x190 [ 30.388072] kmem_cache_free+0x10d/0x4d0 [ 30.388645] rcu_core+0x8c8/0x2860 [ 30.389154] __do_softirq+0x1b7/0x7d4 [ 30.389692] [ 30.389931] Last potentially related work creation: [ 30.390588] kasan_save_stack+0x22/0x50 [ 30.391147] __kasan_record_aux_stack+0x8e/0xa0 [ 30.391783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.392500] remove_vma+0x139/0x170 [ 30.393009] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.393638] do_vmi_munmap+0x1f1/0x2b0 [ 30.394185] __vm_munmap+0x138/0x3a0 [ 30.394726] __x64_sys_munmap+0x59/0x80 [ 30.395288] do_syscall_64+0x3f/0x90 [ 30.395816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396533] [ 30.396780] The buggy address belongs to the object at ffff88800e8859f8 [ 30.396780] which belongs to the cache vm_area_struct of size 168 [ 30.398510] The buggy address is located 88 bytes inside of [ 30.398510] freed 168-byte region [ffff88800e8859f8, ffff88800e885aa0) [ 30.400158] [ 30.400419] The buggy address belongs to the physical page: [ 30.401185] page:00000000e1934c97 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe885 [ 30.402460] memcg:ffff8880198f0701 [ 30.402961] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.403715] page_type: 0xffffffff() [ 30.404242] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.405329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198f0701 [ 30.406379] page dumped because: kasan: bad access detected [ 30.407171] [ 30.407421] Memory state around the buggy address: [ 30.408095] ffff88800e885900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.409090] ffff88800e885980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.410085] >ffff88800e885a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.411090] ^ [ 30.411901] ffff88800e885a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.412902] ffff88800e885b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.413892] ================================================================== [ 30.415681] Disabling lock debugging due to kernel taint [ 32.388852] BUG: Bad rss-counter state mm:000000000bbbbd06 type:MM_FILEPAGES val:33 [ 32.389724] BUG: Bad rss-counter state mm:000000000bbbbd06 type:MM_ANONPAGES val:22 [ 32.841409] BUG: Bad rss-counter state mm:0000000092e96255 type:MM_FILEPAGES val:33 [ 32.842873] BUG: Bad rss-counter state mm:0000000092e96255 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43042' (ECDSA) to the list of known hosts. 2023/06/21 06:58:50 fuzzer started 2023/06/21 06:58:51 dialing manager at localhost:36067 2023/06/21 06:58:51 checking machine... 2023/06/21 06:58:51 checking revisions... [ 33.583850] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:58:51 testing simple program... [ 33.640903] cgroup: Unknown subsys name 'net' [ 33.698660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:58:50 Registers: info registers vcpu 0 RAX=ffff8880146c3680 RBX=ffff88806ce40d70 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff888019977c90 RSP=ffff888019977bd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff8880087b8500 R13=ffff88806ce40d70 R14=ffffea00002d9980 R15=ffff88806ce40d50 RIP=ffffffff81806e41 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 00007f5ce1197900 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=00007ffd9df9f000 CR3=000000000f206000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c04400 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=00007f8176d79db0 CR3=000000000d93e000 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=2030353a38353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a38353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000