syzkaller login: [ 35.130800] BUG: Bad rss-counter state mm:000000003bdbeeb1 type:MM_FILEPAGES val:33 [ 35.133278] BUG: Bad rss-counter state mm:000000003bdbeeb1 type:MM_ANONPAGES val:22 [ 35.309821] ================================================================== [ 35.310742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.311684] Read of size 8 at addr ffff8880183ca5c8 by task sshd/220 [ 35.312458] [ 35.312680] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.313657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.314666] Call Trace: [ 35.315002] [ 35.315290] dump_stack_lvl+0x91/0xf0 [ 35.315793] print_report+0xcc/0x620 [ 35.316280] ? __virt_addr_valid+0x102/0x340 [ 35.316840] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.317462] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.318082] kasan_report+0xbe/0xf0 [ 35.318569] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.319200] vma_interval_tree_remove+0xc75/0xec0 [ 35.319808] vma_prepare+0xc54/0x11a0 [ 35.320292] __split_vma+0x5af/0x950 [ 35.320774] ? __pfx___split_vma+0x10/0x10 [ 35.321305] ? find_held_lock+0x2c/0x110 [ 35.321832] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.322405] ? lock_is_held_type+0x9f/0x120 [ 35.322964] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.323579] ? mtree_range_walk+0x632/0x900 [ 35.324136] ? mas_walk+0x5c7/0x7c0 [ 35.324615] do_vmi_munmap+0x1f1/0x2b0 [ 35.325113] mmap_region+0x1f9/0x2660 [ 35.325606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.326125] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.326861] ? __pfx_lock_acquire+0x10/0x10 [ 35.327399] ? __pfx_mmap_region+0x10/0x10 [ 35.327938] ? security_mmap_addr+0x7d/0xa0 [ 35.328475] ? get_unmapped_area+0x1f5/0x3f0 [ 35.329057] do_mmap+0x854/0xf00 [ 35.329507] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.330040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.330668] ksys_mmap_pgoff+0x3af/0x500 [ 35.331261] do_syscall_64+0x3f/0x90 [ 35.331824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.332620] RIP: 0033:0x7fb878d1ed82 [ 35.333155] 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 [ 35.336088] RSP: 002b:00007ffce93feee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.337367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb878d1ed82 [ 35.338384] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb878158000 [ 35.339680] RBP: 00007fb878158000 R08: 0000000000000009 R09: 0000000000001000 [ 35.341004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7b7337980 [ 35.342105] R13: 00007ffce93fef00 R14: 00007ffce93fef30 R15: 00007ffce93ff290 [ 35.343301] [ 35.343654] [ 35.343904] Allocated by task 213: [ 35.344402] kasan_save_stack+0x22/0x50 [ 35.345008] kasan_set_track+0x25/0x30 [ 35.345581] __kasan_slab_alloc+0x59/0x70 [ 35.346195] kmem_cache_alloc+0x16b/0x370 [ 35.346825] vm_area_dup+0x20/0x160 [ 35.347360] __split_vma+0x170/0x950 [ 35.347908] split_vma+0xc6/0x110 [ 35.348429] mprotect_fixup+0x8d2/0xb30 [ 35.349021] do_mprotect_pkey+0x87e/0xd40 [ 35.349628] __x64_sys_mprotect+0x78/0xc0 [ 35.350237] do_syscall_64+0x3f/0x90 [ 35.350797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.351552] [ 35.351815] Freed by task 213: [ 35.352270] kasan_save_stack+0x22/0x50 [ 35.352859] kasan_set_track+0x25/0x30 [ 35.353437] kasan_save_free_info+0x2b/0x50 [ 35.354056] __kasan_slab_free+0x10a/0x190 [ 35.354699] kmem_cache_free+0x10d/0x4d0 [ 35.355301] rcu_core+0x8c8/0x2860 [ 35.355826] __do_softirq+0x1b7/0x7d4 [ 35.356380] [ 35.356634] Last potentially related work creation: [ 35.357312] kasan_save_stack+0x22/0x50 [ 35.357904] __kasan_record_aux_stack+0x8e/0xa0 [ 35.358593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.359344] remove_vma+0x139/0x170 [ 35.359881] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.360541] do_vmi_munmap+0x1f1/0x2b0 [ 35.361107] __vm_munmap+0x138/0x3a0 [ 35.361684] __x64_sys_munmap+0x59/0x80 [ 35.362268] do_syscall_64+0x3f/0x90 [ 35.362842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.363588] [ 35.363836] The buggy address belongs to the object at ffff8880183ca570 [ 35.363836] which belongs to the cache vm_area_struct of size 168 [ 35.365582] The buggy address is located 88 bytes inside of [ 35.365582] freed 168-byte region [ffff8880183ca570, ffff8880183ca618) [ 35.367230] [ 35.367485] The buggy address belongs to the physical page: [ 35.368241] page:0000000045a9e6ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183ca [ 35.369504] memcg:ffff888019cafb01 [ 35.370001] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.370846] page_type: 0xffffffff() [ 35.371390] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.372501] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cafb01 [ 35.373586] page dumped because: kasan: bad access detected [ 35.374381] [ 35.374652] Memory state around the buggy address: [ 35.375354] ffff8880183ca480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.376380] ffff8880183ca500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.377393] >ffff8880183ca580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.378402] ^ [ 35.379211] ffff8880183ca600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 35.380215] ffff8880183ca680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.381221] ================================================================== [ 35.382397] Disabling lock debugging due to kernel taint [ 37.211747] BUG: Bad rss-counter state mm:00000000d2492f55 type:MM_FILEPAGES val:33 [ 37.212351] BUG: Bad rss-counter state mm:00000000d2492f55 type:MM_ANONPAGES val:22 [ 37.594673] BUG: Bad rss-counter state mm:00000000245d718c type:MM_FILEPAGES val:33 [ 37.595255] BUG: Bad rss-counter state mm:00000000245d718c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8928' (ECDSA) to the list of known hosts. 2023/06/20 08:14:04 fuzzer started 2023/06/20 08:14:04 dialing manager at localhost:44161 2023/06/20 08:14:04 checking machine... 2023/06/20 08:14:04 checking revisions... [ 38.306928] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:14:04 testing simple program... [ 38.349323] cgroup: Unknown subsys name 'net' [ 38.394329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:13:59 Registers: info registers vcpu 0 RAX=0000000000010b7e RBX=0000000000000002 RCX=ffffffff813ad6cf RDX=0000000000010b8b RSI=0000000000003ad6 RDI=ffffffff860d690e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d68c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130868 RFL=00000287 [--S--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 00007f0b43329900 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=00007ffd89dd6000 CR3=000000000d7aa000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f90a9d3ddf0 CR3=000000000d7ee000 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=a389d3145e8643912f4cb1bb547b95d0 XMM02=000000000011de98eff9b2d0a8fce9cb XMM03=000000000011df682c67c8bc2e329bc3 XMM04=a748cc00210d7fd100000000000ae988 XMM05=cf4f52facb401c0f00000000001352d0 XMM06=4fda316b135da52b0000000000134370 XMM07=e042d86d42eb936e0000000000124b60 XMM08=6ac6cc19e492814b000000000011df68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000