syzkaller login: [ 30.600873] BUG: Bad rss-counter state mm:000000002aa1c9bb type:MM_FILEPAGES val:33 [ 30.602167] BUG: Bad rss-counter state mm:000000002aa1c9bb type:MM_ANONPAGES val:22 [ 30.768399] ================================================================== [ 30.769358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.770313] Read of size 8 at addr ffff888019fd7228 by task sshd/221 [ 30.771245] [ 30.771474] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.772384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.773409] Call Trace: [ 30.773735] [ 30.774037] dump_stack_lvl+0x91/0xf0 [ 30.774578] print_report+0xcc/0x620 [ 30.775236] ? __virt_addr_valid+0x102/0x340 [ 30.775952] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776755] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777594] kasan_report+0xbe/0xf0 [ 30.778240] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779095] vma_interval_tree_remove+0xc75/0xec0 [ 30.779912] vma_prepare+0xc54/0x11a0 [ 30.780569] __split_vma+0x5af/0x950 [ 30.781187] ? __pfx___split_vma+0x10/0x10 [ 30.781737] ? find_held_lock+0x2c/0x110 [ 30.782305] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.782912] ? lock_is_held_type+0x9f/0x120 [ 30.783496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.784148] ? mtree_range_walk+0x632/0x900 [ 30.784740] ? mas_walk+0x5c7/0x7c0 [ 30.785254] do_vmi_munmap+0x1f1/0x2b0 [ 30.785777] mmap_region+0x1f9/0x2660 [ 30.786308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.786871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.787614] ? __pfx_lock_acquire+0x10/0x10 [ 30.788186] ? __pfx_mmap_region+0x10/0x10 [ 30.788720] ? security_mmap_addr+0x7d/0xa0 [ 30.789270] ? get_unmapped_area+0x1f5/0x3f0 [ 30.789834] do_mmap+0x854/0xf00 [ 30.790321] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.790861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.791455] ksys_mmap_pgoff+0x3af/0x500 [ 30.791985] do_syscall_64+0x3f/0x90 [ 30.792482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793149] RIP: 0033:0x7f1dfea94d82 [ 30.793611] 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 [ 30.795908] RSP: 002b:00007ffc057ba048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.796846] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1dfea94d82 [ 30.797736] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1dfdece000 [ 30.798654] RBP: 00007f1dfdece000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799540] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c96b594ec0 [ 30.800401] R13: 00007ffc057ba060 R14: 00007ffc057ba090 R15: 00007ffc057ba3f0 [ 30.801266] [ 30.801556] [ 30.801774] Allocated by task 214: [ 30.802212] kasan_save_stack+0x22/0x50 [ 30.802727] kasan_set_track+0x25/0x30 [ 30.803243] __kasan_slab_alloc+0x59/0x70 [ 30.803769] kmem_cache_alloc+0x16b/0x370 [ 30.804314] vm_area_dup+0x20/0x160 [ 30.804773] __split_vma+0x170/0x950 [ 30.805316] split_vma+0xc6/0x110 [ 30.805880] mprotect_fixup+0x8d2/0xb30 [ 30.806412] do_mprotect_pkey+0x87e/0xd40 [ 30.806991] __x64_sys_mprotect+0x78/0xc0 [ 30.807550] do_syscall_64+0x3f/0x90 [ 30.808060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808728] [ 30.808947] Freed by task 214: [ 30.809370] kasan_save_stack+0x22/0x50 [ 30.809890] kasan_set_track+0x25/0x30 [ 30.810406] kasan_save_free_info+0x2b/0x50 [ 30.810961] __kasan_slab_free+0x10a/0x190 [ 30.811503] kmem_cache_free+0x10d/0x4d0 [ 30.812012] rcu_core+0x8c8/0x2860 [ 30.812462] __do_softirq+0x1b7/0x7d4 [ 30.812938] [ 30.813175] Last potentially related work creation: [ 30.813782] kasan_save_stack+0x22/0x50 [ 30.814314] __kasan_record_aux_stack+0x8e/0xa0 [ 30.814897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.815577] remove_vma+0x139/0x170 [ 30.816064] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.816610] do_vmi_munmap+0x1f1/0x2b0 [ 30.817101] __vm_munmap+0x138/0x3a0 [ 30.817570] __x64_sys_munmap+0x59/0x80 [ 30.818084] do_syscall_64+0x3f/0x90 [ 30.818555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819239] [ 30.819456] The buggy address belongs to the object at ffff888019fd71d0 [ 30.819456] which belongs to the cache vm_area_struct of size 168 [ 30.820918] The buggy address is located 88 bytes inside of [ 30.820918] freed 168-byte region [ffff888019fd71d0, ffff888019fd7278) [ 30.822350] [ 30.822564] The buggy address belongs to the physical page: [ 30.823241] page:00000000ccbec752 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fd7 [ 30.824335] memcg:ffff888016bac001 [ 30.824759] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.825411] page_type: 0xffffffff() [ 30.825853] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.826774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bac001 [ 30.827691] page dumped because: kasan: bad access detected [ 30.828354] [ 30.828570] Memory state around the buggy address: [ 30.829156] ffff888019fd7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.830012] ffff888019fd7180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.830890] >ffff888019fd7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.831761] ^ [ 30.832318] ffff888019fd7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.833173] ffff888019fd7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.834030] ================================================================== [ 30.835195] Disabling lock debugging due to kernel taint [ 33.165577] BUG: Bad rss-counter state mm:0000000014696b9e type:MM_FILEPAGES val:33 [ 33.166842] BUG: Bad rss-counter state mm:0000000014696b9e type:MM_ANONPAGES val:22 [ 33.711588] BUG: Bad rss-counter state mm:00000000fa610a98 type:MM_FILEPAGES val:33 [ 33.712815] BUG: Bad rss-counter state mm:00000000fa610a98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48506' (ECDSA) to the list of known hosts. 2023/06/20 14:23:27 fuzzer started 2023/06/20 14:23:27 dialing manager at localhost:36067 2023/06/20 14:23:27 checking machine... 2023/06/20 14:23:27 checking revisions... [ 34.432261] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:23:28 testing simple program... [ 34.482198] cgroup: Unknown subsys name 'net' [ 34.523125] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:23:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff2dc5ed08 CR3=000000000d752000 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=2037323a33323a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33323a3431203032 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=ffff888008c04400 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=00007f39d18f4d90 CR3=000000000da04000 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=8e5432f83dfe4eab034e09ade5c7663e XMM02=000000000011bb60ec2efd57dc4c00df XMM03=00000000001229408bc5c7e9a6503540 XMM04=8f344a64a6b041ac00000000000ae988 XMM05=650a30f66e54ae890000000000132ca0 XMM06=c291bd5c70af25b90000000000132698 XMM07=e042d86d42eb936e0000000000122bc0 XMM08=8bc5c7e9a6503540000000000011bbc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000