syzkaller login: [ 30.604596] BUG: Bad rss-counter state mm:00000000bcdb2d57 type:MM_FILEPAGES val:33 [ 30.605732] BUG: Bad rss-counter state mm:00000000bcdb2d57 type:MM_ANONPAGES val:22 [ 30.760765] ================================================================== [ 30.761680] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.762618] Read of size 8 at addr ffff88800d926a50 by task sshd/220 [ 30.763401] [ 30.763711] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.764577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.765549] Call Trace: [ 30.765885] [ 30.766175] dump_stack_lvl+0x91/0xf0 [ 30.766667] print_report+0xcc/0x620 [ 30.767157] ? __virt_addr_valid+0x102/0x340 [ 30.767712] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768340] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768955] kasan_report+0xbe/0xf0 [ 30.769429] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770045] vma_interval_tree_remove+0xc75/0xec0 [ 30.770645] vma_prepare+0xc54/0x11a0 [ 30.771124] __split_vma+0x5af/0x950 [ 30.771593] ? __pfx___split_vma+0x10/0x10 [ 30.772139] ? find_held_lock+0x2c/0x110 [ 30.772657] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.773218] ? lock_is_held_type+0x9f/0x120 [ 30.773750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.774347] ? mtree_range_walk+0x632/0x900 [ 30.774897] ? mas_walk+0x5c7/0x7c0 [ 30.775379] do_vmi_munmap+0x1f1/0x2b0 [ 30.775878] mmap_region+0x1f9/0x2660 [ 30.776357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.776864] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.777568] ? __pfx_lock_acquire+0x10/0x10 [ 30.778097] ? __pfx_mmap_region+0x10/0x10 [ 30.778620] ? security_mmap_addr+0x7d/0xa0 [ 30.779146] ? get_unmapped_area+0x1f5/0x3f0 [ 30.779694] do_mmap+0x854/0xf00 [ 30.780139] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.780630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.781184] ksys_mmap_pgoff+0x3af/0x500 [ 30.781691] do_syscall_64+0x3f/0x90 [ 30.782168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782809] RIP: 0033:0x7fed3a50cd82 [ 30.783258] 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 [ 30.785390] RSP: 002b:00007ffe02790288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.786284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed3a50cd82 [ 30.787122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed39946000 [ 30.787978] RBP: 00007fed39946000 R08: 0000000000000009 R09: 0000000000001000 [ 30.788808] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d69843f60 [ 30.789650] R13: 00007ffe027902a0 R14: 00007ffe027902d0 R15: 00007ffe02790630 [ 30.790516] [ 30.790805] [ 30.791017] Allocated by task 213: [ 30.791442] kasan_save_stack+0x22/0x50 [ 30.791958] kasan_set_track+0x25/0x30 [ 30.792455] __kasan_slab_alloc+0x59/0x70 [ 30.792979] kmem_cache_alloc+0x16b/0x370 [ 30.793492] vm_area_dup+0x20/0x160 [ 30.793943] __split_vma+0x170/0x950 [ 30.794407] split_vma+0xc6/0x110 [ 30.794864] mprotect_fixup+0x8d2/0xb30 [ 30.795361] do_mprotect_pkey+0x87e/0xd40 [ 30.795892] __x64_sys_mprotect+0x78/0xc0 [ 30.796411] do_syscall_64+0x3f/0x90 [ 30.796887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797528] [ 30.797745] Freed by task 213: [ 30.798140] kasan_save_stack+0x22/0x50 [ 30.798641] kasan_set_track+0x25/0x30 [ 30.799142] kasan_save_free_info+0x2b/0x50 [ 30.799672] __kasan_slab_free+0x10a/0x190 [ 30.800208] kmem_cache_free+0x10d/0x4d0 [ 30.800717] rcu_core+0x8c8/0x2860 [ 30.801158] __do_softirq+0x1b7/0x7d4 [ 30.801644] [ 30.801858] Last potentially related work creation: [ 30.802444] kasan_save_stack+0x22/0x50 [ 30.802957] __kasan_record_aux_stack+0x8e/0xa0 [ 30.803527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.804193] remove_vma+0x139/0x170 [ 30.804654] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.805210] do_vmi_munmap+0x1f1/0x2b0 [ 30.805696] __vm_munmap+0x138/0x3a0 [ 30.806156] __x64_sys_munmap+0x59/0x80 [ 30.806654] do_syscall_64+0x3f/0x90 [ 30.807132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.807773] [ 30.808010] Second to last potentially related work creation: [ 30.808704] kasan_save_stack+0x22/0x50 [ 30.809206] __kasan_record_aux_stack+0x8e/0xa0 [ 30.809771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.810406] remove_vma+0x139/0x170 [ 30.810855] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.811407] do_vmi_munmap+0x1f1/0x2b0 [ 30.811907] mmap_region+0x1f9/0x2660 [ 30.812393] do_mmap+0x854/0xf00 [ 30.812817] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.813304] ksys_mmap_pgoff+0x3af/0x500 [ 30.813810] do_syscall_64+0x3f/0x90 [ 30.814285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.814929] [ 30.815148] The buggy address belongs to the object at ffff88800d9269f8 [ 30.815148] which belongs to the cache vm_area_struct of size 168 [ 30.816622] The buggy address is located 88 bytes inside of [ 30.816622] freed 168-byte region [ffff88800d9269f8, ffff88800d926aa0) [ 30.818020] [ 30.818233] The buggy address belongs to the physical page: [ 30.818883] page:000000005a39964d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd926 [ 30.819959] memcg:ffff88800ece7f01 [ 30.820387] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.821028] page_type: 0xffffffff() [ 30.821480] raw: 0100000000000200 ffff8880087a0c80 ffffea0000369180 dead000000000006 [ 30.822391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ece7f01 [ 30.823299] page dumped because: kasan: bad access detected [ 30.823975] [ 30.824189] Memory state around the buggy address: [ 30.824773] ffff88800d926900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.825622] ffff88800d926980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.826467] >ffff88800d926a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.827312] ^ [ 30.828010] ffff88800d926a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.828877] ffff88800d926b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.829733] ================================================================== [ 30.831011] Disabling lock debugging due to kernel taint [ 33.430007] BUG: Bad rss-counter state mm:0000000020d8ff9a type:MM_FILEPAGES val:33 [ 33.431113] BUG: Bad rss-counter state mm:0000000020d8ff9a type:MM_ANONPAGES val:22 [ 33.999962] BUG: Bad rss-counter state mm:00000000dd6a1706 type:MM_FILEPAGES val:33 [ 34.001122] BUG: Bad rss-counter state mm:00000000dd6a1706 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33701' (ECDSA) to the list of known hosts. 2023/06/21 04:41:46 fuzzer started 2023/06/21 04:41:46 dialing manager at localhost:36067 2023/06/21 04:41:46 checking machine... 2023/06/21 04:41:46 checking revisions... [ 34.700487] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:41:46 testing simple program... [ 34.746956] cgroup: Unknown subsys name 'net' [ 34.814951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:41:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000001 RDX=0000000000000dc0 RSI=ffffffff81f05454 RDI=ffff888008441500 RBP=ffff888008441500 RSP=ffff888016677c80 R8 =0000000000000040 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000020 R13=0000000000000dc0 R14=ffff88800c6432c0 R15=ffff888015f0f000 RIP=ffffffff8135b930 RFL=00000247 [---Z-PC] 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 00007fe0e5b94900 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=00007fe0e614c0b0 CR3=000000000dca8000 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=2035343a31343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a31343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd385015f10 CR3=000000000d70e000 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=be73431995f1cb8acc4c63aad89e5807 XMM02=000000000011a650ec2efd57dc4c00df XMM03=0000000000121be8de3ccd1b79f7032b XMM04=ea20a160192c07f900000000000ae988 XMM05=19e9129bd510f2350000000000132d10 XMM06=f8715f4ceacd1a460000000000131b78 XMM07=e042d86d42eb936e0000000000121e68 XMM08=de3ccd1b79f7032b000000000011a6b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000