syzkaller login: [ 31.652441] BUG: Bad rss-counter state mm:00000000ce50edb2 type:MM_FILEPAGES val:33 [ 31.653672] BUG: Bad rss-counter state mm:00000000ce50edb2 type:MM_ANONPAGES val:22 [ 31.691994] ================================================================== [ 31.692897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.693854] Read of size 8 at addr ffff88801b84bc20 by task sshd/220 [ 31.694714] [ 31.694940] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.695804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.696825] Call Trace: [ 31.697149] [ 31.697431] dump_stack_lvl+0x91/0xf0 [ 31.697924] print_report+0xcc/0x620 [ 31.698411] ? __virt_addr_valid+0x102/0x340 [ 31.698967] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.699589] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.700211] kasan_report+0xbe/0xf0 [ 31.700689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.701311] vma_interval_tree_remove+0xc75/0xec0 [ 31.701920] vma_prepare+0xc54/0x11a0 [ 31.702405] __split_vma+0x5af/0x950 [ 31.702883] ? __pfx___split_vma+0x10/0x10 [ 31.703414] ? find_held_lock+0x2c/0x110 [ 31.703940] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.704502] ? lock_is_held_type+0x9f/0x120 [ 31.705048] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.705669] ? mtree_range_walk+0x632/0x900 [ 31.706221] ? mas_walk+0x5c7/0x7c0 [ 31.706695] do_vmi_munmap+0x1f1/0x2b0 [ 31.707187] mmap_region+0x1f9/0x2660 [ 31.707668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.708182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.708894] ? __pfx_lock_acquire+0x10/0x10 [ 31.709422] ? __pfx_mmap_region+0x10/0x10 [ 31.709956] ? security_mmap_addr+0x7d/0xa0 [ 31.710486] ? get_unmapped_area+0x1f5/0x3f0 [ 31.711039] do_mmap+0x854/0xf00 [ 31.711473] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.711965] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.712538] ksys_mmap_pgoff+0x3af/0x500 [ 31.713043] do_syscall_64+0x3f/0x90 [ 31.713523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.714188] RIP: 0033:0x7f7897929d82 [ 31.714643] 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 [ 31.716749] RSP: 002b:00007ffd3304a1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.717664] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7897929d82 [ 31.718509] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7896d63000 [ 31.719346] RBP: 00007f7896d63000 R08: 0000000000000009 R09: 0000000000001000 [ 31.720186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055844ad40b20 [ 31.721030] R13: 00007ffd3304a1d0 R14: 00007ffd3304a200 R15: 00007ffd3304a560 [ 31.721892] [ 31.722185] [ 31.722399] Allocated by task 213: [ 31.722828] kasan_save_stack+0x22/0x50 [ 31.723330] kasan_set_track+0x25/0x30 [ 31.723817] __kasan_slab_alloc+0x59/0x70 [ 31.724339] kmem_cache_alloc+0x16b/0x370 [ 31.724856] vm_area_dup+0x20/0x160 [ 31.725314] __split_vma+0x170/0x950 [ 31.725796] split_vma+0xc6/0x110 [ 31.726233] mprotect_fixup+0x8d2/0xb30 [ 31.726736] do_mprotect_pkey+0x87e/0xd40 [ 31.727253] __x64_sys_mprotect+0x78/0xc0 [ 31.727767] do_syscall_64+0x3f/0x90 [ 31.728246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.728879] [ 31.729092] Freed by task 213: [ 31.729483] kasan_save_stack+0x22/0x50 [ 31.730003] kasan_set_track+0x25/0x30 [ 31.730501] kasan_save_free_info+0x2b/0x50 [ 31.731038] __kasan_slab_free+0x10a/0x190 [ 31.731577] kmem_cache_free+0x10d/0x4d0 [ 31.732081] rcu_core+0x8c8/0x2860 [ 31.732525] __do_softirq+0x1b7/0x7d4 [ 31.733006] [ 31.733219] Last potentially related work creation: [ 31.733807] kasan_save_stack+0x22/0x50 [ 31.734314] __kasan_record_aux_stack+0x8e/0xa0 [ 31.734894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.735540] remove_vma+0x139/0x170 [ 31.735986] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.736550] do_vmi_munmap+0x1f1/0x2b0 [ 31.737037] __vm_munmap+0x138/0x3a0 [ 31.737507] __x64_sys_munmap+0x59/0x80 [ 31.738021] do_syscall_64+0x3f/0x90 [ 31.738522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.739179] [ 31.739394] The buggy address belongs to the object at ffff88801b84bbc8 [ 31.739394] which belongs to the cache vm_area_struct of size 168 [ 31.740888] The buggy address is located 88 bytes inside of [ 31.740888] freed 168-byte region [ffff88801b84bbc8, ffff88801b84bc70) [ 31.742308] [ 31.742526] The buggy address belongs to the physical page: [ 31.743202] page:00000000bc4b21bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b84b [ 31.744307] memcg:ffff88801b97a201 [ 31.744737] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.745387] page_type: 0xffffffff() [ 31.745854] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.746791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b97a201 [ 31.747710] page dumped because: kasan: bad access detected [ 31.748373] [ 31.748589] Memory state around the buggy address: [ 31.749176] ffff88801b84bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.750053] ffff88801b84bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.750911] >ffff88801b84bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.751765] ^ [ 31.752303] ffff88801b84bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.753171] ffff88801b84bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.754044] ================================================================== [ 31.755025] Disabling lock debugging due to kernel taint [ 33.626391] BUG: Bad rss-counter state mm:0000000092bb87d5 type:MM_FILEPAGES val:33 [ 33.627760] BUG: Bad rss-counter state mm:0000000092bb87d5 type:MM_ANONPAGES val:22 [ 34.078710] BUG: Bad rss-counter state mm:000000005437855f type:MM_FILEPAGES val:33 [ 34.079986] BUG: Bad rss-counter state mm:000000005437855f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8386' (ECDSA) to the list of known hosts. 2023/06/19 17:30:30 fuzzer started 2023/06/19 17:30:30 dialing manager at localhost:44161 2023/06/19 17:30:30 checking machine... 2023/06/19 17:30:30 checking revisions... [ 34.631349] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:30:31 testing simple program... [ 34.681416] cgroup: Unknown subsys name 'net' [ 34.725493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:30:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e10 RDI=ffffffff8180995d RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015d8b680 R15=ffff88800973a780 RIP=ffffffff811303b2 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 00007fd62e238900 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=00007fffbb8a9000 CR3=000000000e7e2000 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=ffff888008c58400 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=00007f4a48b83090 CR3=000000000964a000 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=6950fb3a10b08dba344a2c231af5e819 XMM02=000000000011cf50eff9b2d0a8fce9cb XMM03=000000000011d0202c67c8bc2e329bc3 XMM04=c5ddda1c8cb1501b00000000000ae988 XMM05=19e9129bd510f23500000000001340c0 XMM06=de68ecea9353efb80000000000132f28 XMM07=e042d86d42eb936e00000000001247b8 XMM08=54367c260e0eefad000000000011d020 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000