syzkaller login: [ 41.657911] BUG: Bad rss-counter state mm:00000000ec3d8e32 type:MM_FILEPAGES val:33 [ 41.658934] BUG: Bad rss-counter state mm:00000000ec3d8e32 type:MM_ANONPAGES val:22 [ 41.825097] ================================================================== [ 41.826218] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.827377] Read of size 8 at addr ffff888015c33228 by task sshd/218 [ 41.828436] [ 41.828722] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.829758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.830873] Call Trace: [ 41.831198] [ 41.831489] dump_stack_lvl+0x91/0xf0 [ 41.831970] print_report+0xcc/0x620 [ 41.832442] ? __virt_addr_valid+0x102/0x340 [ 41.833024] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.833641] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.834251] kasan_report+0xbe/0xf0 [ 41.834728] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.835346] vma_interval_tree_remove+0xc75/0xec0 [ 41.835946] vma_prepare+0xc54/0x11a0 [ 41.836422] __split_vma+0x5af/0x950 [ 41.836894] ? __pfx___split_vma+0x10/0x10 [ 41.837416] ? find_held_lock+0x2c/0x110 [ 41.837936] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.838496] ? lock_is_held_type+0x9f/0x120 [ 41.839025] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.839632] ? mtree_range_walk+0x632/0x900 [ 41.840174] ? mas_walk+0x5c7/0x7c0 [ 41.840668] do_vmi_munmap+0x1f1/0x2b0 [ 41.841158] mmap_region+0x1f9/0x2660 [ 41.841641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.842148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.842858] ? __pfx_lock_acquire+0x10/0x10 [ 41.843385] ? __pfx_mmap_region+0x10/0x10 [ 41.843919] ? security_mmap_addr+0x7d/0xa0 [ 41.844442] ? get_unmapped_area+0x1f5/0x3f0 [ 41.845005] do_mmap+0x854/0xf00 [ 41.845448] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.845937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.846491] ksys_mmap_pgoff+0x3af/0x500 [ 41.846991] do_syscall_64+0x3f/0x90 [ 41.847470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.848111] RIP: 0033:0x7f9554ef0d82 [ 41.848570] 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 [ 41.850697] RSP: 002b:00007ffd3bf90d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.851599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9554ef0d82 [ 41.852445] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f955432a000 [ 41.853304] RBP: 00007f955432a000 R08: 0000000000000009 R09: 0000000000001000 [ 41.854144] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2a7eb0ec0 [ 41.854994] R13: 00007ffd3bf90da0 R14: 00007ffd3bf90dd0 R15: 00007ffd3bf91130 [ 41.855851] [ 41.856139] [ 41.856356] Allocated by task 211: [ 41.856790] kasan_save_stack+0x22/0x50 [ 41.857291] kasan_set_track+0x25/0x30 [ 41.857778] __kasan_slab_alloc+0x59/0x70 [ 41.858294] kmem_cache_alloc+0x16b/0x370 [ 41.858803] vm_area_dup+0x20/0x160 [ 41.859250] __split_vma+0x170/0x950 [ 41.859725] split_vma+0xc6/0x110 [ 41.860163] mprotect_fixup+0x8d2/0xb30 [ 41.860667] do_mprotect_pkey+0x87e/0xd40 [ 41.861186] __x64_sys_mprotect+0x78/0xc0 [ 41.861701] do_syscall_64+0x3f/0x90 [ 41.862167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.862796] [ 41.863014] Freed by task 19: [ 41.863398] kasan_save_stack+0x22/0x50 [ 41.863901] kasan_set_track+0x25/0x30 [ 41.864393] kasan_save_free_info+0x2b/0x50 [ 41.864935] __kasan_slab_free+0x10a/0x190 [ 41.865464] kmem_cache_free+0x10d/0x4d0 [ 41.865968] rcu_core+0x8c8/0x2860 [ 41.866408] __do_softirq+0x1b7/0x7d4 [ 41.866881] [ 41.867099] Last potentially related work creation: [ 41.867681] kasan_save_stack+0x22/0x50 [ 41.868177] __kasan_record_aux_stack+0x8e/0xa0 [ 41.868750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.869430] remove_vma+0x139/0x170 [ 41.869876] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.870432] do_vmi_munmap+0x1f1/0x2b0 [ 41.870911] __vm_munmap+0x138/0x3a0 [ 41.871376] __x64_sys_munmap+0x59/0x80 [ 41.871875] do_syscall_64+0x3f/0x90 [ 41.872346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.873012] [ 41.873231] The buggy address belongs to the object at ffff888015c331d0 [ 41.873231] which belongs to the cache vm_area_struct of size 168 [ 41.874685] The buggy address is located 88 bytes inside of [ 41.874685] freed 168-byte region [ffff888015c331d0, ffff888015c33278) [ 41.876074] [ 41.876297] The buggy address belongs to the physical page: [ 41.876956] page:00000000ce946013 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c33 [ 41.878039] memcg:ffff88800e805901 [ 41.878467] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.879118] page_type: 0xffffffff() [ 41.879566] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.880471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e805901 [ 41.881377] page dumped because: kasan: bad access detected [ 41.882036] [ 41.882253] Memory state around the buggy address: [ 41.882832] ffff888015c33100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.883686] ffff888015c33180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.884534] >ffff888015c33200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.885395] ^ [ 41.885952] ffff888015c33280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.886805] ffff888015c33300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.887654] ================================================================== [ 41.888603] Disabling lock debugging due to kernel taint [ 44.110330] BUG: Bad rss-counter state mm:00000000b8412e8d type:MM_FILEPAGES val:33 [ 44.111490] BUG: Bad rss-counter state mm:00000000b8412e8d type:MM_ANONPAGES val:22 [ 44.581925] BUG: Bad rss-counter state mm:00000000d6b9a646 type:MM_FILEPAGES val:33 [ 44.582983] BUG: Bad rss-counter state mm:00000000d6b9a646 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31524' (ECDSA) to the list of known hosts. 2023/06/20 05:16:51 fuzzer started 2023/06/20 05:16:52 dialing manager at localhost:44161 2023/06/20 05:16:52 checking machine... 2023/06/20 05:16:52 checking revisions... [ 45.213057] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:16:52 testing simple program... [ 45.257984] cgroup: Unknown subsys name 'net' [ 45.299425] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:16:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888010310000 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801cdef418 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000cc0 RIP=ffffffff81374466 RFL=00000293 [--S-A-C] 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 00007f090f77a900 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=00007ffc77217000 CR3=000000001a336000 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=ffff888008c58400 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=00007f547bdc7fa0 CR3=000000000c5f0000 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=c2dc223d3c9c92b34d400248a70a2c05 XMM02=000000000011cf90eff9b2d0a8fce9cb XMM03=000000000011d0602c67c8bc2e329bc3 XMM04=3267054fda64346100000000000ae988 XMM05=751b9502027dc0b90000000000133298 XMM06=bdf2e299e47b49d50000000000133120 XMM07=e042d86d42eb936e0000000000123c20 XMM08=be584de01c54c8af000000000011d060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000