syzkaller login: [ 29.427731] BUG: Bad rss-counter state mm:00000000d61391d9 type:MM_FILEPAGES val:33 [ 29.428967] BUG: Bad rss-counter state mm:00000000d61391d9 type:MM_ANONPAGES val:22 [ 29.472827] ================================================================== [ 29.473573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.474340] Read of size 8 at addr ffff8880169d3880 by task sshd/219 [ 29.474962] [ 29.475146] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.475851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.476640] Call Trace: [ 29.476901] [ 29.477304] dump_stack_lvl+0x91/0xf0 [ 29.477706] print_report+0xcc/0x620 [ 29.478103] ? __virt_addr_valid+0x102/0x340 [ 29.478560] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.479059] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.479559] kasan_report+0xbe/0xf0 [ 29.479950] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.480453] vma_interval_tree_remove+0xc75/0xec0 [ 29.480949] vma_prepare+0xc54/0x11a0 [ 29.481362] __split_vma+0x5af/0x950 [ 29.481753] ? __pfx___split_vma+0x10/0x10 [ 29.482186] ? find_held_lock+0x2c/0x110 [ 29.482613] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.483081] ? lock_is_held_type+0x9f/0x120 [ 29.483518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.484013] ? mtree_range_walk+0x632/0x900 [ 29.484468] ? mas_walk+0x5c7/0x7c0 [ 29.484861] do_vmi_munmap+0x1f1/0x2b0 [ 29.485274] mmap_region+0x1f9/0x2660 [ 29.485678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.486096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.486681] ? __pfx_lock_acquire+0x10/0x10 [ 29.487114] ? __pfx_mmap_region+0x10/0x10 [ 29.487545] ? security_mmap_addr+0x7d/0xa0 [ 29.487977] ? get_unmapped_area+0x1f5/0x3f0 [ 29.488422] do_mmap+0x854/0xf00 [ 29.488781] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.489200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.489666] ksys_mmap_pgoff+0x3af/0x500 [ 29.490078] do_syscall_64+0x3f/0x90 [ 29.490471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.491004] RIP: 0033:0x7f8462c35d82 [ 29.491380] 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 [ 29.493072] RSP: 002b:00007ffcb2f7e0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.493816] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8462c35d82 [ 29.494494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f846206f000 [ 29.495171] RBP: 00007f846206f000 R08: 0000000000000009 R09: 0000000000001000 [ 29.495852] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c891a8f70 [ 29.496532] R13: 00007ffcb2f7e0e0 R14: 00007ffcb2f7e110 R15: 00007ffcb2f7e470 [ 29.497231] [ 29.497472] [ 29.497649] Allocated by task 212: [ 29.497999] kasan_save_stack+0x22/0x50 [ 29.498407] kasan_set_track+0x25/0x30 [ 29.498810] __kasan_slab_alloc+0x59/0x70 [ 29.499238] kmem_cache_alloc+0x16b/0x370 [ 29.499656] vm_area_dup+0x20/0x160 [ 29.500030] __split_vma+0x170/0x950 [ 29.500405] split_vma+0xc6/0x110 [ 29.500764] mprotect_fixup+0x8d2/0xb30 [ 29.501189] do_mprotect_pkey+0x87e/0xd40 [ 29.501615] __x64_sys_mprotect+0x78/0xc0 [ 29.502035] do_syscall_64+0x3f/0x90 [ 29.502416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.502931] [ 29.503109] Freed by task 212: [ 29.503427] kasan_save_stack+0x22/0x50 [ 29.503837] kasan_set_track+0x25/0x30 [ 29.504236] kasan_save_free_info+0x2b/0x50 [ 29.504661] __kasan_slab_free+0x10a/0x190 [ 29.505088] kmem_cache_free+0x10d/0x4d0 [ 29.505506] rcu_core+0x8c8/0x2860 [ 29.505863] __do_softirq+0x1b7/0x7d4 [ 29.506246] [ 29.506423] Last potentially related work creation: [ 29.506895] kasan_save_stack+0x22/0x50 [ 29.507338] __kasan_record_aux_stack+0x8e/0xa0 [ 29.507925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.508572] remove_vma+0x139/0x170 [ 29.509028] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.509595] do_vmi_munmap+0x1f1/0x2b0 [ 29.510079] __vm_munmap+0x138/0x3a0 [ 29.510545] __x64_sys_munmap+0x59/0x80 [ 29.511041] do_syscall_64+0x3f/0x90 [ 29.511506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.512154] [ 29.512368] Second to last potentially related work creation: [ 29.513074] kasan_save_stack+0x22/0x50 [ 29.513606] __kasan_record_aux_stack+0x8e/0xa0 [ 29.514182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.514829] remove_vma+0x139/0x170 [ 29.515275] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.515837] do_vmi_munmap+0x1f1/0x2b0 [ 29.516329] mmap_region+0x1f9/0x2660 [ 29.516811] do_mmap+0x854/0xf00 [ 29.517243] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.517718] ksys_mmap_pgoff+0x3af/0x500 [ 29.518269] do_syscall_64+0x3f/0x90 [ 29.518735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.519370] [ 29.519584] The buggy address belongs to the object at ffff8880169d3828 [ 29.519584] which belongs to the cache vm_area_struct of size 168 [ 29.521070] The buggy address is located 88 bytes inside of [ 29.521070] freed 168-byte region [ffff8880169d3828, ffff8880169d38d0) [ 29.522524] [ 29.522739] The buggy address belongs to the physical page: [ 29.523408] page:00000000abb0dff5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169d3 [ 29.524506] memcg:ffff888016a60601 [ 29.524936] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.525490] page_type: 0xffffffff() [ 29.525838] raw: 0100000000000200 ffff88800879fc80 ffffea00003a3cc0 dead000000000002 [ 29.526536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a60601 [ 29.527229] page dumped because: kasan: bad access detected [ 29.527732] [ 29.527900] Memory state around the buggy address: [ 29.528342] ffff8880169d3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.528991] ffff8880169d3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.529648] >ffff8880169d3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.530291] ^ [ 29.530604] ffff8880169d3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.531253] ffff8880169d3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 29.531899] ================================================================== [ 29.532601] Disabling lock debugging due to kernel taint [ 31.335130] BUG: Bad rss-counter state mm:000000002f6c02fb type:MM_FILEPAGES val:33 [ 31.336306] BUG: Bad rss-counter state mm:000000002f6c02fb type:MM_ANONPAGES val:22 [ 31.715002] BUG: Bad rss-counter state mm:000000008a4be5a2 type:MM_FILEPAGES val:33 [ 31.716228] BUG: Bad rss-counter state mm:000000008a4be5a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7926' (ECDSA) to the list of known hosts. 2023/06/19 19:11:06 fuzzer started 2023/06/19 19:11:07 dialing manager at localhost:44161 2023/06/19 19:11:07 checking machine... 2023/06/19 19:11:07 checking revisions... [ 32.441535] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:11:07 testing simple program... [ 32.493545] cgroup: Unknown subsys name 'net' [ 32.553809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:11:01 Registers: info registers vcpu 0 RAX=ffffffff863dc254 RBX=0000000000000001 RCX=ffffffff8386627a RDX=0000000000000000 RSI=ffffffff863dc254 RDI=ffffffff85fbfd84 RBP=ffffffff85fbfd88 RSP=ffff8880166d7960 R8 =ffffffff863dc254 R9 =ffff8880166d7a40 R10=0000000000038001 R11=0000000000091a6c R12=ffffffff85fbfd84 R13=ffffffff85fbfd84 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 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 00007f6b9890a900 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=00007ffe90085000 CR3=000000000da08000 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=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=00007f661d4216b0 CR3=000000000ea34000 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=2036303a31313a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a31313a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000