syzkaller login: [ 30.663734] BUG: Bad rss-counter state mm:000000003de9268d type:MM_FILEPAGES val:33 [ 30.664874] BUG: Bad rss-counter state mm:000000003de9268d type:MM_ANONPAGES val:22 [ 30.703469] ================================================================== [ 30.704335] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.705226] Read of size 8 at addr ffff8880187e2c20 by task sshd/220 [ 30.706039] [ 30.706249] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.707067] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.707991] Call Trace: [ 30.708298] [ 30.708569] dump_stack_lvl+0x91/0xf0 [ 30.709063] print_report+0xcc/0x620 [ 30.709528] ? __virt_addr_valid+0x102/0x340 [ 30.710051] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710639] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711224] kasan_report+0xbe/0xf0 [ 30.711678] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712267] vma_interval_tree_remove+0xc75/0xec0 [ 30.712838] vma_prepare+0xc54/0x11a0 [ 30.713301] __split_vma+0x5af/0x950 [ 30.713751] ? __pfx___split_vma+0x10/0x10 [ 30.714254] ? find_held_lock+0x2c/0x110 [ 30.714787] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.715355] ? lock_is_held_type+0x9f/0x120 [ 30.715904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.716526] ? mtree_range_walk+0x632/0x900 [ 30.717091] ? mas_walk+0x5c7/0x7c0 [ 30.717574] do_vmi_munmap+0x1f1/0x2b0 [ 30.718072] mmap_region+0x1f9/0x2660 [ 30.718557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.719074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.719806] ? __pfx_lock_acquire+0x10/0x10 [ 30.720353] ? __pfx_mmap_region+0x10/0x10 [ 30.720895] ? security_mmap_addr+0x7d/0xa0 [ 30.721457] ? get_unmapped_area+0x1f5/0x3f0 [ 30.722013] do_mmap+0x854/0xf00 [ 30.722461] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.722965] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.723530] ksys_mmap_pgoff+0x3af/0x500 [ 30.724048] do_syscall_64+0x3f/0x90 [ 30.724535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.725202] RIP: 0033:0x7efe27bc2d82 [ 30.725668] 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 [ 30.727847] RSP: 002b:00007ffc870aaee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.728772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe27bc2d82 [ 30.729648] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe26ffc000 [ 30.730516] RBP: 00007efe26ffc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.731381] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e268904f70 [ 30.732246] R13: 00007ffc870aaf00 R14: 00007ffc870aaf30 R15: 00007ffc870ab290 [ 30.733141] [ 30.733442] [ 30.733660] Allocated by task 213: [ 30.734100] kasan_save_stack+0x22/0x50 [ 30.734610] kasan_set_track+0x25/0x30 [ 30.735107] __kasan_slab_alloc+0x59/0x70 [ 30.735641] kmem_cache_alloc+0x16b/0x370 [ 30.736171] vm_area_dup+0x20/0x160 [ 30.736636] __split_vma+0x170/0x950 [ 30.737126] split_vma+0xc6/0x110 [ 30.737578] mprotect_fixup+0x8d2/0xb30 [ 30.738081] do_mprotect_pkey+0x87e/0xd40 [ 30.738603] __x64_sys_mprotect+0x78/0xc0 [ 30.739136] do_syscall_64+0x3f/0x90 [ 30.739620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.740270] [ 30.740492] Freed by task 13: [ 30.740884] kasan_save_stack+0x22/0x50 [ 30.741417] kasan_set_track+0x25/0x30 [ 30.741913] kasan_save_free_info+0x2b/0x50 [ 30.742454] __kasan_slab_free+0x10a/0x190 [ 30.743001] kmem_cache_free+0x10d/0x4d0 [ 30.743516] rcu_core+0x8c8/0x2860 [ 30.743970] __do_softirq+0x1b7/0x7d4 [ 30.744453] [ 30.744675] Last potentially related work creation: [ 30.745289] kasan_save_stack+0x22/0x50 [ 30.745794] __kasan_record_aux_stack+0x8e/0xa0 [ 30.746372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.747032] remove_vma+0x139/0x170 [ 30.747498] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.748062] do_vmi_munmap+0x1f1/0x2b0 [ 30.748556] __vm_munmap+0x138/0x3a0 [ 30.749052] __x64_sys_munmap+0x59/0x80 [ 30.749558] do_syscall_64+0x3f/0x90 [ 30.750035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750705] [ 30.750923] Second to last potentially related work creation: [ 30.751617] kasan_save_stack+0x22/0x50 [ 30.752131] __kasan_record_aux_stack+0x8e/0xa0 [ 30.752711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.753367] remove_vma+0x139/0x170 [ 30.753830] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.754397] do_vmi_munmap+0x1f1/0x2b0 [ 30.754888] __vm_munmap+0x138/0x3a0 [ 30.755369] __x64_sys_munmap+0x59/0x80 [ 30.755838] do_syscall_64+0x3f/0x90 [ 30.756289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756900] [ 30.757117] The buggy address belongs to the object at ffff8880187e2bc8 [ 30.757117] which belongs to the cache vm_area_struct of size 168 [ 30.758501] The buggy address is located 88 bytes inside of [ 30.758501] freed 168-byte region [ffff8880187e2bc8, ffff8880187e2c70) [ 30.759828] [ 30.760032] The buggy address belongs to the physical page: [ 30.760657] page:0000000033d83a32 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880187e23a0 pfn:0x187e2 [ 30.761838] memcg:ffff8880197f6001 [ 30.762247] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.762855] page_type: 0xffffffff() [ 30.763286] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380790 ffffea00003a18d0 [ 30.764149] raw: ffff8880187e23a0 0000000000110010 00000001ffffffff ffff8880197f6001 [ 30.765012] page dumped because: kasan: bad access detected [ 30.765649] [ 30.765856] Memory state around the buggy address: [ 30.766410] ffff8880187e2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.767239] ffff8880187e2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.768063] >ffff8880187e2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.768886] ^ [ 30.769421] ffff8880187e2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.770245] ffff8880187e2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.771071] ================================================================== [ 30.772381] Disabling lock debugging due to kernel taint [ 33.116459] BUG: Bad rss-counter state mm:000000009f422c08 type:MM_FILEPAGES val:33 [ 33.117485] BUG: Bad rss-counter state mm:000000009f422c08 type:MM_ANONPAGES val:22 [ 33.577457] BUG: Bad rss-counter state mm:0000000092aa888e type:MM_FILEPAGES val:33 [ 33.578405] BUG: Bad rss-counter state mm:0000000092aa888e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16664' (ECDSA) to the list of known hosts. 2023/06/20 20:32:08 fuzzer started 2023/06/20 20:32:09 dialing manager at localhost:36067 2023/06/20 20:32:09 checking machine... 2023/06/20 20:32:09 checking revisions... [ 34.338533] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:32:09 testing simple program... [ 34.391673] cgroup: Unknown subsys name 'net' [ 34.439350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:32:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028f7e5c RSI=ffffffff83640ed0 RDI=ffff8880147bf350 RBP=ffff8880147bf320 RSP=ffff8880147bf280 R8 =0000000000000001 R9 =ffff8880147bf2c8 R10=0000000000038001 R11=000000000008a89d R12=ffff8880147bf350 R13=0000000000000000 R14=ffff8880168b51c0 R15=0000000000092cc0 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007f7053e35900 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=00007f9cf2dfe650 CR3=000000000c674000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d0729c4df9cbee0b00000000000ae988 XMM05=694c1f22b69296cd00000000001342f8 XMM06=4fda316b135da52b00000000001330e8 XMM07=fb795ef6d657705600000000001223b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffd28b81e78 CR3=000000000feae000 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=2038303a32333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a32333a3032203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000