syzkaller login: [ 40.565486] BUG: Bad rss-counter state mm:000000006c5d59d0 type:MM_FILEPAGES val:33 [ 40.566633] BUG: Bad rss-counter state mm:000000006c5d59d0 type:MM_ANONPAGES val:22 [ 40.711622] ================================================================== [ 40.712593] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.713609] Read of size 8 at addr ffff88800f328d08 by task sshd/219 [ 40.714333] [ 40.714541] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.715503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.716422] Call Trace: [ 40.716726] [ 40.717000] dump_stack_lvl+0x91/0xf0 [ 40.717489] print_report+0xcc/0x620 [ 40.717951] ? __virt_addr_valid+0x102/0x340 [ 40.718477] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.719068] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.719648] kasan_report+0xbe/0xf0 [ 40.720103] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.720691] vma_interval_tree_remove+0xc75/0xec0 [ 40.721257] vma_prepare+0xc54/0x11a0 [ 40.721712] __split_vma+0x5af/0x950 [ 40.722155] ? __pfx___split_vma+0x10/0x10 [ 40.722654] ? find_held_lock+0x2c/0x110 [ 40.723175] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.723710] ? lock_is_held_type+0x9f/0x120 [ 40.724216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.724789] ? mtree_range_walk+0x632/0x900 [ 40.725311] ? mas_walk+0x5c7/0x7c0 [ 40.725756] do_vmi_munmap+0x1f1/0x2b0 [ 40.726221] mmap_region+0x1f9/0x2660 [ 40.726677] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.727171] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.727837] ? __pfx_lock_acquire+0x10/0x10 [ 40.728339] ? __pfx_mmap_region+0x10/0x10 [ 40.728838] ? security_mmap_addr+0x7d/0xa0 [ 40.729334] ? get_unmapped_area+0x1f5/0x3f0 [ 40.729849] do_mmap+0x854/0xf00 [ 40.730264] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.730739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.731271] ksys_mmap_pgoff+0x3af/0x500 [ 40.731750] do_syscall_64+0x3f/0x90 [ 40.732198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.732805] RIP: 0033:0x7fa5ce652d82 [ 40.733233] 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 [ 40.735223] RSP: 002b:00007ffe450954a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.736072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5ce652d82 [ 40.736865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5cda8c000 [ 40.737660] RBP: 00007fa5cda8c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.738448] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614eaac3ec0 [ 40.739249] R13: 00007ffe450954c0 R14: 00007ffe450954f0 R15: 00007ffe45095850 [ 40.740052] [ 40.740326] [ 40.740530] Allocated by task 212: [ 40.740929] kasan_save_stack+0x22/0x50 [ 40.741402] kasan_set_track+0x25/0x30 [ 40.741863] __kasan_slab_alloc+0x59/0x70 [ 40.742357] kmem_cache_alloc+0x16b/0x370 [ 40.742849] vm_area_dup+0x20/0x160 [ 40.743277] __split_vma+0x170/0x950 [ 40.743715] split_vma+0xc6/0x110 [ 40.744128] mprotect_fixup+0x8d2/0xb30 [ 40.744598] do_mprotect_pkey+0x87e/0xd40 [ 40.745088] __x64_sys_mprotect+0x78/0xc0 [ 40.745580] do_syscall_64+0x3f/0x90 [ 40.746025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.746627] [ 40.746848] Freed by task 212: [ 40.747217] kasan_save_stack+0x22/0x50 [ 40.747697] kasan_set_track+0x25/0x30 [ 40.748161] kasan_save_free_info+0x2b/0x50 [ 40.748668] __kasan_slab_free+0x10a/0x190 [ 40.749170] kmem_cache_free+0x10d/0x4d0 [ 40.749644] rcu_core+0x8c8/0x2860 [ 40.750062] __do_softirq+0x1b7/0x7d4 [ 40.750514] [ 40.750723] Last potentially related work creation: [ 40.751272] kasan_save_stack+0x22/0x50 [ 40.751745] __kasan_record_aux_stack+0x8e/0xa0 [ 40.752287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.752893] remove_vma+0x139/0x170 [ 40.753316] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.753833] do_vmi_munmap+0x1f1/0x2b0 [ 40.754288] __vm_munmap+0x138/0x3a0 [ 40.754757] __x64_sys_munmap+0x59/0x80 [ 40.755226] do_syscall_64+0x3f/0x90 [ 40.755722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.756328] [ 40.756535] The buggy address belongs to the object at ffff88800f328cb0 [ 40.756535] which belongs to the cache vm_area_struct of size 168 [ 40.757904] The buggy address is located 88 bytes inside of [ 40.757904] freed 168-byte region [ffff88800f328cb0, ffff88800f328d58) [ 40.759226] [ 40.759431] The buggy address belongs to the physical page: [ 40.760046] page:00000000c09865bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf328 [ 40.761056] memcg:ffff88800ddeaa01 [ 40.761454] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.762121] page_type: 0xffffffff() [ 40.762544] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.763413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddeaa01 [ 40.764264] page dumped because: kasan: bad access detected [ 40.764887] [ 40.765094] Memory state around the buggy address: [ 40.765635] ffff88800f328c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.766435] ffff88800f328c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.767256] >ffff88800f328d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.768056] ^ [ 40.768469] ffff88800f328d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.769264] ffff88800f328e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.770063] ================================================================== [ 40.770964] Disabling lock debugging due to kernel taint [ 43.101385] BUG: Bad rss-counter state mm:000000002ff308b1 type:MM_FILEPAGES val:33 [ 43.103093] BUG: Bad rss-counter state mm:000000002ff308b1 type:MM_ANONPAGES val:22 [ 43.605411] BUG: Bad rss-counter state mm:00000000de00f2e0 type:MM_FILEPAGES val:33 [ 43.606618] BUG: Bad rss-counter state mm:00000000de00f2e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1979' (ECDSA) to the list of known hosts. 2023/06/20 04:30:32 fuzzer started 2023/06/20 04:30:32 dialing manager at localhost:44161 2023/06/20 04:30:32 checking machine... 2023/06/20 04:30:32 checking revisions... [ 44.383100] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:30:32 testing simple program... [ 44.437013] cgroup: Unknown subsys name 'net' [ 44.475975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:30:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001f97e34 RSI=ffff88800fcbf128 RDI=ffff88800fcbf1a8 RBP=ffff88800fcbf1f0 RSP=ffff88800fcbf098 R8 =0000000000000001 R9 =ffff88800fcbf198 R10=0000000000038001 R11=0000000000006097 R12=ffff88800fcbf1b8 R13=ffff88800fcbf1a0 R14=ffff88800fcbf128 R15=ffff88800fcbf158 RIP=ffffffff81131c60 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 00007fe08d2cf900 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=00007fe08d2ae020 CR3=0000000015824000 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=00007fee0a874048 CR3=000000000c980000 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=2032333a30333a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a30333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000