syzkaller login: [ 32.145313] BUG: Bad rss-counter state mm:000000005a9a82e4 type:MM_FILEPAGES val:33 [ 32.146307] BUG: Bad rss-counter state mm:000000005a9a82e4 type:MM_ANONPAGES val:22 [ 32.258147] ================================================================== [ 32.258819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.259454] Read of size 8 at addr ffff88800c992b38 by task sshd/220 [ 32.259951] [ 32.260104] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.260683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.261339] Call Trace: [ 32.261636] [ 32.261833] dump_stack_lvl+0x91/0xf0 [ 32.262322] print_report+0xcc/0x620 [ 32.262646] ? __virt_addr_valid+0x102/0x340 [ 32.263025] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.263448] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.263863] kasan_report+0xbe/0xf0 [ 32.264213] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.264629] vma_interval_tree_remove+0xc75/0xec0 [ 32.265026] vma_prepare+0xc54/0x11a0 [ 32.265351] __split_vma+0x5af/0x950 [ 32.265718] ? __pfx___split_vma+0x10/0x10 [ 32.266080] ? find_held_lock+0x2c/0x110 [ 32.266445] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.266838] ? lock_is_held_type+0x9f/0x120 [ 32.267225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.267645] ? mtree_range_walk+0x632/0x900 [ 32.268043] ? mas_walk+0x5c7/0x7c0 [ 32.268379] do_vmi_munmap+0x1f1/0x2b0 [ 32.268702] mmap_region+0x1f9/0x2660 [ 32.269039] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.269446] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.269946] ? __pfx_lock_acquire+0x10/0x10 [ 32.270323] ? __pfx_mmap_region+0x10/0x10 [ 32.270690] ? security_mmap_addr+0x7d/0xa0 [ 32.271038] ? get_unmapped_area+0x1f5/0x3f0 [ 32.271403] do_mmap+0x854/0xf00 [ 32.271700] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.272032] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.272398] ksys_mmap_pgoff+0x3af/0x500 [ 32.272726] do_syscall_64+0x3f/0x90 [ 32.273048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.273559] RIP: 0033:0x7fe67b3b8d82 [ 32.273863] 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 [ 32.275435] RSP: 002b:00007fff8ff4edb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.276066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe67b3b8d82 [ 32.276662] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe67a7f2000 [ 32.277321] RBP: 00007fe67a7f2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.277959] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654180fbf70 [ 32.278564] R13: 00007fff8ff4edd0 R14: 00007fff8ff4ee00 R15: 00007fff8ff4f160 [ 32.279144] [ 32.279352] [ 32.279502] Allocated by task 213: [ 32.279801] kasan_save_stack+0x22/0x50 [ 32.280192] kasan_set_track+0x25/0x30 [ 32.280626] __kasan_slab_alloc+0x59/0x70 [ 32.281039] kmem_cache_alloc+0x16b/0x370 [ 32.281428] vm_area_dup+0x20/0x160 [ 32.281737] __split_vma+0x170/0x950 [ 32.282053] split_vma+0xc6/0x110 [ 32.282355] mprotect_fixup+0x8d2/0xb30 [ 32.282729] do_mprotect_pkey+0x87e/0xd40 [ 32.283106] __x64_sys_mprotect+0x78/0xc0 [ 32.283474] do_syscall_64+0x3f/0x90 [ 32.283806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.284248] [ 32.284397] Freed by task 213: [ 32.284682] kasan_save_stack+0x22/0x50 [ 32.285067] kasan_set_track+0x25/0x30 [ 32.285468] kasan_save_free_info+0x2b/0x50 [ 32.285826] __kasan_slab_free+0x10a/0x190 [ 32.286190] kmem_cache_free+0x10d/0x4d0 [ 32.286594] rcu_core+0x8c8/0x2860 [ 32.286910] __do_softirq+0x1b7/0x7d4 [ 32.287250] [ 32.287401] Last potentially related work creation: [ 32.287817] kasan_save_stack+0x22/0x50 [ 32.288181] __kasan_record_aux_stack+0x8e/0xa0 [ 32.288577] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.289038] remove_vma+0x139/0x170 [ 32.289357] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.289796] do_vmi_munmap+0x1f1/0x2b0 [ 32.290130] __vm_munmap+0x138/0x3a0 [ 32.290460] __x64_sys_munmap+0x59/0x80 [ 32.290817] do_syscall_64+0x3f/0x90 [ 32.291164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.291638] [ 32.291796] The buggy address belongs to the object at ffff88800c992ae0 [ 32.291796] which belongs to the cache vm_area_struct of size 168 [ 32.292806] The buggy address is located 88 bytes inside of [ 32.292806] freed 168-byte region [ffff88800c992ae0, ffff88800c992b88) [ 32.293937] [ 32.294105] The buggy address belongs to the physical page: [ 32.294543] page:0000000096312a6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc992 [ 32.295264] memcg:ffff88801a42d101 [ 32.295555] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.296081] page_type: 0xffffffff() [ 32.296395] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.297036] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a42d101 [ 32.297729] page dumped because: kasan: bad access detected [ 32.298191] [ 32.298343] Memory state around the buggy address: [ 32.298750] ffff88800c992a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.299380] ffff88800c992a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.299981] >ffff88800c992b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.300560] ^ [ 32.301002] ffff88800c992b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.301636] ffff88800c992c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.302228] ================================================================== [ 32.302989] Disabling lock debugging due to kernel taint [ 33.691349] BUG: Bad rss-counter state mm:00000000735409d1 type:MM_FILEPAGES val:33 [ 33.692269] BUG: Bad rss-counter state mm:00000000735409d1 type:MM_ANONPAGES val:22 [ 34.062267] BUG: Bad rss-counter state mm:00000000c9f0005f type:MM_FILEPAGES val:33 [ 34.062953] BUG: Bad rss-counter state mm:00000000c9f0005f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6395' (ECDSA) to the list of known hosts. 2023/06/20 09:45:12 fuzzer started 2023/06/20 09:45:12 dialing manager at localhost:44161 2023/06/20 09:45:12 checking machine... 2023/06/20 09:45:12 checking revisions... [ 34.633988] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:45:12 testing simple program... [ 34.665545] cgroup: Unknown subsys name 'net' [ 34.744336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136e RSI=ffffffff8460144a RDI=ffff88806ce09b70 RBP=ffff88806ce09b30 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801422b680 R15=ffff88800d6b4d90 RIP=ffffffff813ad446 RFL=00000296 [--S-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 00007f9bb9481900 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=00007f9bb88e39f0 CR3=000000000c5d4000 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=a80df6124ebbe0ac164113343e00639a XMM02=eff9b2d0a8fce9cb000000000011d348 XMM03=2c67c8bc2e329bc3000000000011d470 XMM04=0c22f17899dd3a9400000000000ae988 XMM05=2165d94e62ecc36600000000001353f0 XMM06=4fda316b135da52b0000000000134490 XMM07=fb795ef6d65770560000000000124a08 XMM08=2c67c8bc2e329bc3000000000011d470 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000003 RSI=0000000000000000 RDI=ffff888008d724c0 RBP=0000000000000000 RSP=ffff888008d87d68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000003 R12=ffffffff8540f200 R13=ffff88806cf35000 R14=0000000000000000 R15=ffff888008d71b40 RIP=ffffffff8136546b 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 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=00007ffe958e0000 CR3=0000000014114000 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