syzkaller login: [ 62.048775] BUG: Bad rss-counter state mm:00000000ce78f4e4 type:MM_FILEPAGES val:33 [ 62.050742] BUG: Bad rss-counter state mm:00000000ce78f4e4 type:MM_ANONPAGES val:22 [ 62.210845] ================================================================== [ 62.211942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.213034] Read of size 8 at addr ffff888015d5e310 by task sshd/225 [ 62.213982] [ 62.214200] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.215064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.216040] Call Trace: [ 62.216372] [ 62.216660] dump_stack_lvl+0x91/0xf0 [ 62.217154] print_report+0xcc/0x620 [ 62.217640] ? __virt_addr_valid+0x102/0x340 [ 62.218200] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.218824] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.219452] kasan_report+0xbe/0xf0 [ 62.219937] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.220576] vma_interval_tree_remove+0xc75/0xec0 [ 62.221188] vma_prepare+0xc54/0x11a0 [ 62.221678] __split_vma+0x5af/0x950 [ 62.222158] ? __pfx___split_vma+0x10/0x10 [ 62.222687] ? find_held_lock+0x2c/0x110 [ 62.223216] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.223794] ? lock_is_held_type+0x9f/0x120 [ 62.224363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.224980] ? mtree_range_walk+0x632/0x900 [ 62.225544] ? mas_walk+0x5c7/0x7c0 [ 62.226025] do_vmi_munmap+0x1f1/0x2b0 [ 62.226524] mmap_region+0x1f9/0x2660 [ 62.227016] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.227532] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.228269] ? __pfx_lock_acquire+0x10/0x10 [ 62.228805] ? __pfx_mmap_region+0x10/0x10 [ 62.229342] ? security_mmap_addr+0x7d/0xa0 [ 62.229884] ? get_unmapped_area+0x1f5/0x3f0 [ 62.230439] do_mmap+0x854/0xf00 [ 62.230895] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.231402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.231971] ksys_mmap_pgoff+0x3af/0x500 [ 62.232506] do_syscall_64+0x3f/0x90 [ 62.232992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.233646] RIP: 0033:0x7f6829263d82 [ 62.234114] 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 [ 62.236277] RSP: 002b:00007ffe172fb5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.237188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6829263d82 [ 62.238056] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f682869d000 [ 62.238923] RBP: 00007f682869d000 R08: 0000000000000009 R09: 0000000000001000 [ 62.239799] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c546ec4f70 [ 62.240659] R13: 00007ffe172fb610 R14: 00007ffe172fb640 R15: 00007ffe172fb9a0 [ 62.241546] [ 62.241845] [ 62.242066] Allocated by task 218: [ 62.242499] kasan_save_stack+0x22/0x50 [ 62.243018] kasan_set_track+0x25/0x30 [ 62.243518] __kasan_slab_alloc+0x59/0x70 [ 62.244053] kmem_cache_alloc+0x16b/0x370 [ 62.244598] vm_area_dup+0x20/0x160 [ 62.245066] __split_vma+0x170/0x950 [ 62.245536] split_vma+0xc6/0x110 [ 62.245984] mprotect_fixup+0x8d2/0xb30 [ 62.246500] do_mprotect_pkey+0x87e/0xd40 [ 62.247033] __x64_sys_mprotect+0x78/0xc0 [ 62.247559] do_syscall_64+0x3f/0x90 [ 62.248028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.248675] [ 62.248894] Freed by task 218: [ 62.249291] kasan_save_stack+0x22/0x50 [ 62.249794] kasan_set_track+0x25/0x30 [ 62.250284] kasan_save_free_info+0x2b/0x50 [ 62.250822] __kasan_slab_free+0x10a/0x190 [ 62.251362] kmem_cache_free+0x10d/0x4d0 [ 62.251871] rcu_core+0x8c8/0x2860 [ 62.252332] __do_softirq+0x1b7/0x7d4 [ 62.252802] [ 62.253017] Last potentially related work creation: [ 62.253614] kasan_save_stack+0x22/0x50 [ 62.254117] __kasan_record_aux_stack+0x8e/0xa0 [ 62.254697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.255442] remove_vma+0x139/0x170 [ 62.255909] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.256479] do_vmi_munmap+0x1f1/0x2b0 [ 62.256970] __vm_munmap+0x138/0x3a0 [ 62.257436] __x64_sys_munmap+0x59/0x80 [ 62.257936] do_syscall_64+0x3f/0x90 [ 62.258407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.259047] [ 62.259263] The buggy address belongs to the object at ffff888015d5e2b8 [ 62.259263] which belongs to the cache vm_area_struct of size 168 [ 62.260735] The buggy address is located 88 bytes inside of [ 62.260735] freed 168-byte region [ffff888015d5e2b8, ffff888015d5e360) [ 62.262129] [ 62.262345] The buggy address belongs to the physical page: [ 62.262993] page:0000000081d7b766 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d5e [ 62.264081] memcg:ffff888019ef7501 [ 62.264529] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.265167] page_type: 0xffffffff() [ 62.265614] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.266521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ef7501 [ 62.267419] page dumped because: kasan: bad access detected [ 62.268078] [ 62.268302] Memory state around the buggy address: [ 62.268884] ffff888015d5e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 62.269732] ffff888015d5e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.270592] >ffff888015d5e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.271435] ^ [ 62.271897] ffff888015d5e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 62.272765] ffff888015d5e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 62.273606] ================================================================== [ 62.274523] Disabling lock debugging due to kernel taint [ 64.780598] BUG: Bad rss-counter state mm:00000000eecef721 type:MM_FILEPAGES val:33 [ 64.782082] BUG: Bad rss-counter state mm:00000000eecef721 type:MM_ANONPAGES val:22 [ 65.319213] BUG: Bad rss-counter state mm:00000000691fe3ac type:MM_FILEPAGES val:33 [ 65.320399] BUG: Bad rss-counter state mm:00000000691fe3ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12348' (ECDSA) to the list of known hosts. 2023/06/19 18:49:48 fuzzer started 2023/06/19 18:49:48 dialing manager at localhost:44161 2023/06/19 18:49:48 checking machine... 2023/06/19 18:49:48 checking revisions... [ 65.956064] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:49:49 testing simple program... [ 66.011438] cgroup: Unknown subsys name 'net' [ 66.074574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:49:46 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8504 RDI=ffff888016b4ba74 RBP=0000000000000000 RSP=ffff8880147bf3e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800c1c1e78 RIP=ffffffff814c07f1 RFL=00000293 [--S-A-C] 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 00007f47ac1bf900 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=00007f8254307650 CR3=000000000d5c2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9201b328cffa6b6000000000000ae988 XMM05=98c3e51b5c11db8c0000000000133e30 XMM06=e7a3b750822471340000000000132978 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe3b17b588 CR3=0000000009f68000 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=2038343a39343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a39343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000