syzkaller login: [ 33.129945] BUG: Bad rss-counter state mm:0000000091cfe3fd type:MM_FILEPAGES val:33 [ 33.131042] BUG: Bad rss-counter state mm:0000000091cfe3fd type:MM_ANONPAGES val:22 [ 33.294486] ================================================================== [ 33.295585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.296757] Read of size 8 at addr ffff8880101c6228 by task sshd/220 [ 33.297729] [ 33.297946] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.298799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.299790] Call Trace: [ 33.300109] [ 33.300395] dump_stack_lvl+0x91/0xf0 [ 33.300897] print_report+0xcc/0x620 [ 33.301385] ? __virt_addr_valid+0x102/0x340 [ 33.301930] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.302542] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.303149] kasan_report+0xbe/0xf0 [ 33.303625] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.304265] vma_interval_tree_remove+0xc75/0xec0 [ 33.304884] vma_prepare+0xc54/0x11a0 [ 33.305365] __split_vma+0x5af/0x950 [ 33.305841] ? __pfx___split_vma+0x10/0x10 [ 33.306372] ? find_held_lock+0x2c/0x110 [ 33.306893] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.307458] ? lock_is_held_type+0x9f/0x120 [ 33.307992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.308620] ? mtree_range_walk+0x632/0x900 [ 33.309169] ? mas_walk+0x5c7/0x7c0 [ 33.309643] do_vmi_munmap+0x1f1/0x2b0 [ 33.310133] mmap_region+0x1f9/0x2660 [ 33.310620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.311129] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.311847] ? __pfx_lock_acquire+0x10/0x10 [ 33.312390] ? __pfx_mmap_region+0x10/0x10 [ 33.312943] ? security_mmap_addr+0x7d/0xa0 [ 33.313501] ? get_unmapped_area+0x1f5/0x3f0 [ 33.314068] do_mmap+0x854/0xf00 [ 33.314523] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.315022] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.315612] ksys_mmap_pgoff+0x3af/0x500 [ 33.316134] do_syscall_64+0x3f/0x90 [ 33.316641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.317301] RIP: 0033:0x7f62880ead82 [ 33.317770] 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 [ 33.319983] RSP: 002b:00007fffcafda0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.320933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62880ead82 [ 33.321823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6287524000 [ 33.322706] RBP: 00007f6287524000 R08: 0000000000000009 R09: 0000000000001000 [ 33.323585] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea6f582d90 [ 33.324468] R13: 00007fffcafda0e0 R14: 00007fffcafda110 R15: 00007fffcafda470 [ 33.325377] [ 33.325680] [ 33.325899] Allocated by task 213: [ 33.326343] kasan_save_stack+0x22/0x50 [ 33.326865] kasan_set_track+0x25/0x30 [ 33.327374] __kasan_slab_alloc+0x59/0x70 [ 33.327911] kmem_cache_alloc+0x16b/0x370 [ 33.328451] vm_area_dup+0x20/0x160 [ 33.328931] __split_vma+0x170/0x950 [ 33.329423] split_vma+0xc6/0x110 [ 33.329883] mprotect_fixup+0x8d2/0xb30 [ 33.330404] do_mprotect_pkey+0x87e/0xd40 [ 33.330934] __x64_sys_mprotect+0x78/0xc0 [ 33.331480] do_syscall_64+0x3f/0x90 [ 33.331965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.332641] [ 33.332860] Freed by task 213: [ 33.333269] kasan_save_stack+0x22/0x50 [ 33.333781] kasan_set_track+0x25/0x30 [ 33.334289] kasan_save_free_info+0x2b/0x50 [ 33.334838] __kasan_slab_free+0x10a/0x190 [ 33.335390] kmem_cache_free+0x10d/0x4d0 [ 33.335912] rcu_core+0x8c8/0x2860 [ 33.336367] __do_softirq+0x1b7/0x7d4 [ 33.336859] [ 33.337077] Last potentially related work creation: [ 33.337681] kasan_save_stack+0x22/0x50 [ 33.338196] __kasan_record_aux_stack+0x8e/0xa0 [ 33.338844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.339529] remove_vma+0x139/0x170 [ 33.339993] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.340588] do_vmi_munmap+0x1f1/0x2b0 [ 33.341086] __vm_munmap+0x138/0x3a0 [ 33.341569] __x64_sys_munmap+0x59/0x80 [ 33.342080] do_syscall_64+0x3f/0x90 [ 33.342565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.343224] [ 33.343445] The buggy address belongs to the object at ffff8880101c61d0 [ 33.343445] which belongs to the cache vm_area_struct of size 168 [ 33.344968] The buggy address is located 88 bytes inside of [ 33.344968] freed 168-byte region [ffff8880101c61d0, ffff8880101c6278) [ 33.346413] [ 33.346634] The buggy address belongs to the physical page: [ 33.347313] page:00000000cd656cb3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c6 [ 33.348437] memcg:ffff8880170e4e01 [ 33.348876] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.349545] page_type: 0xffffffff() [ 33.350011] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.350952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880170e4e01 [ 33.351897] page dumped because: kasan: bad access detected [ 33.352593] [ 33.352813] Memory state around the buggy address: [ 33.353413] ffff8880101c6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.354300] ffff8880101c6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.355183] >ffff8880101c6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.356065] ^ [ 33.356645] ffff8880101c6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.357533] ffff8880101c6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.358413] ================================================================== [ 33.359381] Disabling lock debugging due to kernel taint [ 34.857148] BUG: Bad rss-counter state mm:0000000066b712be type:MM_FILEPAGES val:33 [ 34.858000] BUG: Bad rss-counter state mm:0000000066b712be type:MM_ANONPAGES val:22 [ 35.272863] BUG: Bad rss-counter state mm:00000000601d774b type:MM_FILEPAGES val:33 [ 35.273617] BUG: Bad rss-counter state mm:00000000601d774b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17393' (ECDSA) to the list of known hosts. 2023/06/20 07:05:52 fuzzer started 2023/06/20 07:05:52 dialing manager at localhost:44161 2023/06/20 07:05:52 checking machine... 2023/06/20 07:05:52 checking revisions... [ 35.972109] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:05:52 testing simple program... [ 36.020483] cgroup: Unknown subsys name 'net' [ 36.061086] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:05:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100325c81a RSI=ffffffff82147585 RDI=ffff8880192e40d0 RBP=ffff8880192e4000 RSP=ffff88800c5bfd40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff8880192e4090 R13=ffff8880192e4090 R14=ffff8880192e4048 R15=ffff888016a80680 RIP=ffffffff818cbed9 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 00007f2e2329c900 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=00007ffd4ed49000 CR3=000000000e5c2000 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=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 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=00007fbf3535e050 CR3=000000000cc38000 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=e2dc7b058e973c99c441587e3207fa73 XMM02=000000000011ca60eff9b2d0a8fce9cb XMM03=000000000011cb302c67c8bc2e329bc3 XMM04=5090988d5abd6df300000000000ae988 XMM05=578cb0e6747e103700000000001345c8 XMM06=4fda316b135da52b00000000001339f0 XMM07=e042d86d42eb936e00000000001241f0 XMM08=c79f40b91353ccbc000000000011cb30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000