syzkaller login: [ 49.711620] BUG: Bad rss-counter state mm:00000000bfa053a0 type:MM_FILEPAGES val:33 [ 49.712859] BUG: Bad rss-counter state mm:00000000bfa053a0 type:MM_ANONPAGES val:22 [ 49.750061] ================================================================== [ 49.750944] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.752086] Read of size 8 at addr ffff88801475cd08 by task sshd/220 [ 49.752860] [ 49.753087] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 49.754297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.755256] Call Trace: [ 49.755636] [ 49.755963] dump_stack_lvl+0x91/0xf0 [ 49.756534] print_report+0xcc/0x620 [ 49.757014] ? __virt_addr_valid+0x102/0x340 [ 49.757566] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.758173] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.758800] kasan_report+0xbe/0xf0 [ 49.759269] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.759910] vma_interval_tree_remove+0xc75/0xec0 [ 49.760509] vma_prepare+0xc54/0x11a0 [ 49.760982] __split_vma+0x5af/0x950 [ 49.761454] ? __pfx___split_vma+0x10/0x10 [ 49.761978] ? find_held_lock+0x2c/0x110 [ 49.762498] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.763061] ? lock_is_held_type+0x9f/0x120 [ 49.763594] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.764211] ? mtree_range_walk+0x632/0x900 [ 49.764762] ? mas_walk+0x5c7/0x7c0 [ 49.765238] do_vmi_munmap+0x1f1/0x2b0 [ 49.765723] mmap_region+0x1f9/0x2660 [ 49.766201] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.766708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.767422] ? __pfx_lock_acquire+0x10/0x10 [ 49.767970] ? __pfx_mmap_region+0x10/0x10 [ 49.768495] ? security_mmap_addr+0x7d/0xa0 [ 49.769025] ? get_unmapped_area+0x1f5/0x3f0 [ 49.769571] do_mmap+0x854/0xf00 [ 49.770006] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.770503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.771064] ksys_mmap_pgoff+0x3af/0x500 [ 49.771572] do_syscall_64+0x3f/0x90 [ 49.772063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.772706] RIP: 0033:0x7fb73a904d82 [ 49.773160] 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 [ 49.775267] RSP: 002b:00007ffca5f6ae08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.776169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb73a904d82 [ 49.777016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb739d3e000 [ 49.777859] RBP: 00007fb739d3e000 R08: 0000000000000009 R09: 0000000000001000 [ 49.778704] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630b9447ec0 [ 49.779541] R13: 00007ffca5f6ae20 R14: 00007ffca5f6ae50 R15: 00007ffca5f6b1b0 [ 49.780423] [ 49.780713] [ 49.780927] Allocated by task 213: [ 49.781353] kasan_save_stack+0x22/0x50 [ 49.781855] kasan_set_track+0x25/0x30 [ 49.782345] __kasan_slab_alloc+0x59/0x70 [ 49.782874] kmem_cache_alloc+0x16b/0x370 [ 49.783390] vm_area_dup+0x20/0x160 [ 49.783851] __split_vma+0x170/0x950 [ 49.784313] split_vma+0xc6/0x110 [ 49.784752] mprotect_fixup+0x8d2/0xb30 [ 49.785249] do_mprotect_pkey+0x87e/0xd40 [ 49.785765] __x64_sys_mprotect+0x78/0xc0 [ 49.786281] do_syscall_64+0x3f/0x90 [ 49.786748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.787388] [ 49.787601] Freed by task 213: [ 49.787999] kasan_save_stack+0x22/0x50 [ 49.788496] kasan_set_track+0x25/0x30 [ 49.788986] kasan_save_free_info+0x2b/0x50 [ 49.789512] __kasan_slab_free+0x10a/0x190 [ 49.790044] kmem_cache_free+0x10d/0x4d0 [ 49.790549] rcu_core+0x8c8/0x2860 [ 49.791017] __do_softirq+0x1b7/0x7d4 [ 49.791486] [ 49.791705] Last potentially related work creation: [ 49.792291] kasan_save_stack+0x22/0x50 [ 49.792794] __kasan_record_aux_stack+0x8e/0xa0 [ 49.793365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.794002] remove_vma+0x139/0x170 [ 49.794448] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.795000] do_vmi_munmap+0x1f1/0x2b0 [ 49.795487] __vm_munmap+0x138/0x3a0 [ 49.795965] __x64_sys_munmap+0x59/0x80 [ 49.796461] do_syscall_64+0x3f/0x90 [ 49.796938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.797584] [ 49.797797] The buggy address belongs to the object at ffff88801475ccb0 [ 49.797797] which belongs to the cache vm_area_struct of size 168 [ 49.799268] The buggy address is located 88 bytes inside of [ 49.799268] freed 168-byte region [ffff88801475ccb0, ffff88801475cd58) [ 49.800670] [ 49.800885] The buggy address belongs to the physical page: [ 49.801544] page:00000000daaca4f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1475c [ 49.802639] memcg:ffff88800d424401 [ 49.803060] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.803711] page_type: 0xffffffff() [ 49.804157] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.805068] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d424401 [ 49.805970] page dumped because: kasan: bad access detected [ 49.806629] [ 49.806841] Memory state around the buggy address: [ 49.807413] ffff88801475cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 49.808272] ffff88801475cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 49.809121] >ffff88801475cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 49.809964] ^ [ 49.810399] ffff88801475cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 49.811254] ffff88801475ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 49.812122] ================================================================== [ 49.813033] Disabling lock debugging due to kernel taint [ 51.809953] BUG: Bad rss-counter state mm:00000000df985d54 type:MM_FILEPAGES val:33 [ 51.811091] BUG: Bad rss-counter state mm:00000000df985d54 type:MM_ANONPAGES val:22 [ 52.261417] BUG: Bad rss-counter state mm:00000000f236f94a type:MM_FILEPAGES val:33 [ 52.262569] BUG: Bad rss-counter state mm:00000000f236f94a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54950' (ECDSA) to the list of known hosts. 2023/06/20 02:41:36 fuzzer started 2023/06/20 02:41:36 dialing manager at localhost:44161 2023/06/20 02:41:36 checking machine... 2023/06/20 02:41:36 checking revisions... [ 52.923418] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:41:36 testing simple program... [ 52.980732] cgroup: Unknown subsys name 'net' [ 53.021594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:41:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e983228 RCX=ffffffff818ea8a6 RDX=ffff88800e979b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000009 RSP=ffff8880161ffd88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ed83680 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c01fc 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 00007ff5741e8900 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=00007ff57479f618 CR3=000000000e69c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007fd05d88f050 CR3=000000000f800000 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=509b18bec9fb64aa73449f1663e76be9 XMM02=0000000000126490eff9b2d0a8fce9cb XMM03=00000000001265602c67c8bc2e329bc3 XMM04=c8bb0385d4c4cb4f00000000000ae988 XMM05=19e9129bd510f235000000000013c210 XMM06=8d37ffd8839bba0e000000000013b3e8 XMM07=e042d86d42eb936e000000000012ca68 XMM08=d585f84ac25660750000000000126560 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000