syzkaller login: [ 37.364981] BUG: Bad rss-counter state mm:000000002ee818ca type:MM_FILEPAGES val:33 [ 37.366301] BUG: Bad rss-counter state mm:000000002ee818ca type:MM_ANONPAGES val:22 [ 37.588024] ================================================================== [ 37.588914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.589795] Read of size 8 at addr ffff888019d7f228 by task sshd/219 [ 37.590513] [ 37.590720] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.591621] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.592528] Call Trace: [ 37.592831] [ 37.593105] dump_stack_lvl+0x91/0xf0 [ 37.593583] print_report+0xcc/0x620 [ 37.594042] ? __virt_addr_valid+0x102/0x340 [ 37.594561] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.595141] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.595718] kasan_report+0xbe/0xf0 [ 37.596167] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.596758] vma_interval_tree_remove+0xc75/0xec0 [ 37.597360] vma_prepare+0xc54/0x11a0 [ 37.597853] __split_vma+0x5af/0x950 [ 37.598319] ? __pfx___split_vma+0x10/0x10 [ 37.598846] ? find_held_lock+0x2c/0x110 [ 37.599362] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.599921] ? lock_is_held_type+0x9f/0x120 [ 37.600458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.601080] ? mtree_range_walk+0x632/0x900 [ 37.601632] ? mas_walk+0x5c7/0x7c0 [ 37.602103] do_vmi_munmap+0x1f1/0x2b0 [ 37.602598] mmap_region+0x1f9/0x2660 [ 37.603086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.603591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.604313] ? __pfx_lock_acquire+0x10/0x10 [ 37.604842] ? __pfx_mmap_region+0x10/0x10 [ 37.605373] ? security_mmap_addr+0x7d/0xa0 [ 37.605922] ? get_unmapped_area+0x1f5/0x3f0 [ 37.606476] do_mmap+0x854/0xf00 [ 37.606919] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.607415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.607982] ksys_mmap_pgoff+0x3af/0x500 [ 37.608491] do_syscall_64+0x3f/0x90 [ 37.608969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.609624] RIP: 0033:0x7f419deb7d82 [ 37.610083] 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 [ 37.612231] RSP: 002b:00007fff3f25c798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.613135] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f419deb7d82 [ 37.613991] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f419d2f1000 [ 37.614841] RBP: 00007f419d2f1000 R08: 0000000000000009 R09: 0000000000001000 [ 37.615696] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd41d16ec0 [ 37.616568] R13: 00007fff3f25c7b0 R14: 00007fff3f25c7e0 R15: 00007fff3f25cb40 [ 37.617417] [ 37.617729] [ 37.617944] Allocated by task 212: [ 37.618368] kasan_save_stack+0x22/0x50 [ 37.618878] kasan_set_track+0x25/0x30 [ 37.619366] __kasan_slab_alloc+0x59/0x70 [ 37.619886] kmem_cache_alloc+0x16b/0x370 [ 37.620405] vm_area_dup+0x20/0x160 [ 37.620863] __split_vma+0x170/0x950 [ 37.621324] split_vma+0xc6/0x110 [ 37.621775] mprotect_fixup+0x8d2/0xb30 [ 37.622274] do_mprotect_pkey+0x87e/0xd40 [ 37.622791] __x64_sys_mprotect+0x78/0xc0 [ 37.623305] do_syscall_64+0x3f/0x90 [ 37.623785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.624424] [ 37.624642] Freed by task 212: [ 37.625039] kasan_save_stack+0x22/0x50 [ 37.625540] kasan_set_track+0x25/0x30 [ 37.626048] kasan_save_free_info+0x2b/0x50 [ 37.626578] __kasan_slab_free+0x10a/0x190 [ 37.627111] kmem_cache_free+0x10d/0x4d0 [ 37.627619] rcu_core+0x8c8/0x2860 [ 37.628064] __do_softirq+0x1b7/0x7d4 [ 37.628542] [ 37.628755] Last potentially related work creation: [ 37.629340] kasan_save_stack+0x22/0x50 [ 37.629859] __kasan_record_aux_stack+0x8e/0xa0 [ 37.630420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.631062] remove_vma+0x139/0x170 [ 37.631511] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.632067] do_vmi_munmap+0x1f1/0x2b0 [ 37.632549] __vm_munmap+0x138/0x3a0 [ 37.633012] __x64_sys_munmap+0x59/0x80 [ 37.633512] do_syscall_64+0x3f/0x90 [ 37.633990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.634623] [ 37.634834] The buggy address belongs to the object at ffff888019d7f1d0 [ 37.634834] which belongs to the cache vm_area_struct of size 168 [ 37.636325] The buggy address is located 88 bytes inside of [ 37.636325] freed 168-byte region [ffff888019d7f1d0, ffff888019d7f278) [ 37.637775] [ 37.637996] The buggy address belongs to the physical page: [ 37.638667] page:00000000995f2f35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d7f [ 37.639760] memcg:ffff88800fd51301 [ 37.640183] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.640824] page_type: 0xffffffff() [ 37.641278] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.642209] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd51301 [ 37.643124] page dumped because: kasan: bad access detected [ 37.643785] [ 37.643997] Memory state around the buggy address: [ 37.644578] ffff888019d7f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.645443] ffff888019d7f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.646316] >ffff888019d7f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.647172] ^ [ 37.647733] ffff888019d7f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.648598] ffff888019d7f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.649455] ================================================================== [ 37.650455] Disabling lock debugging due to kernel taint [ 39.424294] BUG: Bad rss-counter state mm:00000000904f48dc type:MM_FILEPAGES val:33 [ 39.425440] BUG: Bad rss-counter state mm:00000000904f48dc type:MM_ANONPAGES val:22 [ 39.849645] BUG: Bad rss-counter state mm:00000000da3b8e0b type:MM_FILEPAGES val:33 [ 39.850497] BUG: Bad rss-counter state mm:00000000da3b8e0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47030' (ECDSA) to the list of known hosts. 2023/06/20 10:04:35 fuzzer started 2023/06/20 10:04:35 dialing manager at localhost:44161 2023/06/20 10:04:35 checking machine... 2023/06/20 10:04:35 checking revisions... [ 40.561513] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:04:35 testing simple program... [ 40.608048] cgroup: Unknown subsys name 'net' [ 40.665744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:04:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fcb398d5ea0 CR3=000000000c936000 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=aaf15a0da59ee5beb84164127621711f XMM02=ec2efd57dc4c00df000000000011c4c8 XMM03=02edec6166adfc2c000000000011c598 XMM04=5f7616ed4726ba2000000000000ae988 XMM05=19e9129bd510f2350000000000133898 XMM06=3e3ddaed749ffd9a0000000000132700 XMM07=e042d86d42eb936e0000000000124028 XMM08=02edec6166adfc2c000000000011c598 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000001676ba145c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=000000000005327f RBP=ffff88806cf28140 RSP=ffff88806cf09b78 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee090 R11=0000000000000001 R12=000000000005327f R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000012 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4d4654d900 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=00007ffc2c8eea3c CR3=000000000ea2a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000