syzkaller login: [ 48.680895] BUG: Bad rss-counter state mm:000000007e659529 type:MM_FILEPAGES val:33 [ 48.682086] BUG: Bad rss-counter state mm:000000007e659529 type:MM_ANONPAGES val:22 [ 48.720934] ================================================================== [ 48.721916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.722845] Read of size 8 at addr ffff88800da98a50 by task sshd/219 [ 48.723600] [ 48.723818] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.724682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.725658] Call Trace: [ 48.725976] <TASK> [ 48.726258] dump_stack_lvl+0x91/0xf0 [ 48.726755] print_report+0xcc/0x620 [ 48.727240] ? __virt_addr_valid+0x102/0x340 [ 48.727801] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.728433] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.729046] kasan_report+0xbe/0xf0 [ 48.729519] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.730133] vma_interval_tree_remove+0xc75/0xec0 [ 48.730739] vma_prepare+0xc54/0x11a0 [ 48.731220] __split_vma+0x5af/0x950 [ 48.731690] ? __pfx___split_vma+0x10/0x10 [ 48.732219] ? find_held_lock+0x2c/0x110 [ 48.732739] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.733299] ? lock_is_held_type+0x9f/0x120 [ 48.733847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.734452] ? mtree_range_walk+0x632/0x900 [ 48.735000] ? mas_walk+0x5c7/0x7c0 [ 48.735480] do_vmi_munmap+0x1f1/0x2b0 [ 48.735968] mmap_region+0x1f9/0x2660 [ 48.736477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.736985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.737709] ? __pfx_lock_acquire+0x10/0x10 [ 48.738242] ? __pfx_mmap_region+0x10/0x10 [ 48.738770] ? security_mmap_addr+0x7d/0xa0 [ 48.739294] ? get_unmapped_area+0x1f5/0x3f0 [ 48.739844] do_mmap+0x854/0xf00 [ 48.740294] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.740793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.741355] ksys_mmap_pgoff+0x3af/0x500 [ 48.741868] do_syscall_64+0x3f/0x90 [ 48.742343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.742989] RIP: 0033:0x7f5123841d82 [ 48.743449] 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 [ 48.745594] RSP: 002b:00007ffcebe75d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.746489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5123841d82 [ 48.747326] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5122c7b000 [ 48.748180] RBP: 00007f5122c7b000 R08: 0000000000000009 R09: 0000000000001000 [ 48.749204] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587313a6b20 [ 48.750053] R13: 00007ffcebe75da0 R14: 00007ffcebe75dd0 R15: 00007ffcebe76130 [ 48.750910] </TASK> [ 48.751203] [ 48.751417] Allocated by task 212: [ 48.751851] kasan_save_stack+0x22/0x50 [ 48.752375] kasan_set_track+0x25/0x30 [ 48.752868] __kasan_slab_alloc+0x59/0x70 [ 48.753389] kmem_cache_alloc+0x16b/0x370 [ 48.753907] vm_area_dup+0x20/0x160 [ 48.754359] __split_vma+0x170/0x950 [ 48.754832] split_vma+0xc6/0x110 [ 48.755268] mprotect_fixup+0x8d2/0xb30 [ 48.755772] do_mprotect_pkey+0x87e/0xd40 [ 48.756300] __x64_sys_mprotect+0x78/0xc0 [ 48.756820] do_syscall_64+0x3f/0x90 [ 48.757291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.757938] [ 48.758153] Freed by task 212: [ 48.758545] kasan_save_stack+0x22/0x50 [ 48.759048] kasan_set_track+0x25/0x30 [ 48.759544] kasan_save_free_info+0x2b/0x50 [ 48.760090] __kasan_slab_free+0x10a/0x190 [ 48.760628] kmem_cache_free+0x10d/0x4d0 [ 48.761133] rcu_core+0x8c8/0x2860 [ 48.761576] __do_softirq+0x1b7/0x7d4 [ 48.762051] [ 48.762264] Last potentially related work creation: [ 48.762868] kasan_save_stack+0x22/0x50 [ 48.763368] __kasan_record_aux_stack+0x8e/0xa0 [ 48.763941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.764598] remove_vma+0x139/0x170 [ 48.765050] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.765610] do_vmi_munmap+0x1f1/0x2b0 [ 48.766095] __vm_munmap+0x138/0x3a0 [ 48.766560] __x64_sys_munmap+0x59/0x80 [ 48.767060] do_syscall_64+0x3f/0x90 [ 48.767532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.768186] [ 48.768405] Second to last potentially related work creation: [ 48.769085] kasan_save_stack+0x22/0x50 [ 48.769592] __kasan_record_aux_stack+0x8e/0xa0 [ 48.770159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.770798] remove_vma+0x139/0x170 [ 48.771255] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.771815] do_vmi_munmap+0x1f1/0x2b0 [ 48.772308] mmap_region+0x1f9/0x2660 [ 48.772794] do_mmap+0x854/0xf00 [ 48.773228] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.773727] ksys_mmap_pgoff+0x3af/0x500 [ 48.774231] do_syscall_64+0x3f/0x90 [ 48.774705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.775353] [ 48.775571] The buggy address belongs to the object at ffff88800da989f8 [ 48.775571] which belongs to the cache vm_area_struct of size 168 [ 48.777047] The buggy address is located 88 bytes inside of [ 48.777047] freed 168-byte region [ffff88800da989f8, ffff88800da98aa0) [ 48.778446] [ 48.778667] The buggy address belongs to the physical page: [ 48.779329] page:00000000527e76bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda98 [ 48.780442] memcg:ffff88800ed67701 [ 48.780884] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 48.781613] page_type: 0xffffffff() [ 48.782078] raw: 0100000000000200 ffff88800879fc80 ffffea000036bf80 dead000000000005 [ 48.783041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed67701 [ 48.783993] page dumped because: kasan: bad access detected [ 48.784694] [ 48.784913] Memory state around the buggy address: [ 48.785515] ffff88800da98900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.786407] ffff88800da98980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 48.787294] >ffff88800da98a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.788195] ^ [ 48.788923] ffff88800da98a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 48.789827] ffff88800da98b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.790714] ================================================================== [ 48.791770] Disabling lock debugging due to kernel taint [ 50.772976] BUG: Bad rss-counter state mm:000000007e473015 type:MM_FILEPAGES val:33 [ 50.774548] BUG: Bad rss-counter state mm:000000007e473015 type:MM_ANONPAGES val:22 [ 51.329869] BUG: Bad rss-counter state mm:000000002cc2a26d type:MM_FILEPAGES val:33 [ 51.331062] BUG: Bad rss-counter state mm:000000002cc2a26d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42262' (ECDSA) to the list of known hosts. 2023/06/19 18:45:26 fuzzer started 2023/06/19 18:45:26 dialing manager at localhost:44161 2023/06/19 18:45:26 checking machine... 2023/06/19 18:45:26 checking revisions... [ 51.933075] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:45:26 testing simple program... [ 51.967452] cgroup: Unknown subsys name 'net' [ 51.997871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:08 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=00007f8fab325e40 CR3=000000000ea1a000 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=2036323a35343a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a35343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff8609fb01 RDX=1ffff1100d9e1353 RSI=ffffffff8450b05e RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a70 R8 =ffffffff8609fb08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800f14b680 R15=ffff88806cf09a98 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007ff5fa4d5900 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=00007ffd7fc0d000 CR3=0000000019d0a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000