syzkaller login: [ 30.457008] BUG: Bad rss-counter state mm:00000000928e2b2f type:MM_FILEPAGES val:33 [ 30.458479] BUG: Bad rss-counter state mm:00000000928e2b2f type:MM_ANONPAGES val:22 [ 30.620003] ================================================================== [ 30.620858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.621736] Read of size 8 at addr ffff888019a74798 by task sshd/219 [ 30.622574] [ 30.622781] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.623597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.624506] Call Trace: [ 30.624806] [ 30.625075] dump_stack_lvl+0x91/0xf0 [ 30.625539] print_report+0xcc/0x620 [ 30.626004] ? __virt_addr_valid+0x102/0x340 [ 30.626528] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.627119] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.627724] kasan_report+0xbe/0xf0 [ 30.628174] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.628763] vma_interval_tree_remove+0xc75/0xec0 [ 30.629338] vma_prepare+0xc54/0x11a0 [ 30.629811] __split_vma+0x5af/0x950 [ 30.630286] ? __pfx___split_vma+0x10/0x10 [ 30.630803] ? find_held_lock+0x2c/0x110 [ 30.631323] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.631881] ? lock_is_held_type+0x9f/0x120 [ 30.632421] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.633017] ? mtree_range_walk+0x632/0x900 [ 30.633567] ? mas_walk+0x5c7/0x7c0 [ 30.634042] do_vmi_munmap+0x1f1/0x2b0 [ 30.634528] mmap_region+0x1f9/0x2660 [ 30.635004] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.635534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.636240] ? __pfx_lock_acquire+0x10/0x10 [ 30.636773] ? __pfx_mmap_region+0x10/0x10 [ 30.637303] ? security_mmap_addr+0x7d/0xa0 [ 30.637832] ? get_unmapped_area+0x1f5/0x3f0 [ 30.638373] do_mmap+0x854/0xf00 [ 30.638802] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.639301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.639857] ksys_mmap_pgoff+0x3af/0x500 [ 30.640362] do_syscall_64+0x3f/0x90 [ 30.640837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.641471] RIP: 0033:0x7f0d08b7cd82 [ 30.641925] 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 [ 30.644042] RSP: 002b:00007fffd8446ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.644944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d08b7cd82 [ 30.645784] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d07fb6000 [ 30.646624] RBP: 00007f0d07fb6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.647488] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ccd5059ec0 [ 30.648328] R13: 00007fffd8446f00 R14: 00007fffd8446f30 R15: 00007fffd8447290 [ 30.649189] [ 30.649473] [ 30.649681] Allocated by task 212: [ 30.650106] kasan_save_stack+0x22/0x50 [ 30.650611] kasan_set_track+0x25/0x30 [ 30.651104] __kasan_slab_alloc+0x59/0x70 [ 30.651634] kmem_cache_alloc+0x16b/0x370 [ 30.652141] vm_area_dup+0x20/0x160 [ 30.652595] __split_vma+0x170/0x950 [ 30.653056] split_vma+0xc6/0x110 [ 30.653488] mprotect_fixup+0x8d2/0xb30 [ 30.653989] do_mprotect_pkey+0x87e/0xd40 [ 30.654499] __x64_sys_mprotect+0x78/0xc0 [ 30.655013] do_syscall_64+0x3f/0x90 [ 30.655501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656143] [ 30.656352] Freed by task 212: [ 30.656735] kasan_save_stack+0x22/0x50 [ 30.657242] kasan_set_track+0x25/0x30 [ 30.657727] kasan_save_free_info+0x2b/0x50 [ 30.658248] __kasan_slab_free+0x10a/0x190 [ 30.658787] kmem_cache_free+0x10d/0x4d0 [ 30.659310] rcu_core+0x8c8/0x2860 [ 30.659746] __do_softirq+0x1b7/0x7d4 [ 30.660216] [ 30.660424] Last potentially related work creation: [ 30.661000] kasan_save_stack+0x22/0x50 [ 30.661488] __kasan_record_aux_stack+0x8e/0xa0 [ 30.662044] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.662672] remove_vma+0x139/0x170 [ 30.663121] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.663670] do_vmi_munmap+0x1f1/0x2b0 [ 30.664148] __vm_munmap+0x138/0x3a0 [ 30.664607] __x64_sys_munmap+0x59/0x80 [ 30.665099] do_syscall_64+0x3f/0x90 [ 30.665578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.666216] [ 30.666423] The buggy address belongs to the object at ffff888019a74740 [ 30.666423] which belongs to the cache vm_area_struct of size 168 [ 30.667900] The buggy address is located 88 bytes inside of [ 30.667900] freed 168-byte region [ffff888019a74740, ffff888019a747e8) [ 30.669297] [ 30.669512] The buggy address belongs to the physical page: [ 30.670172] page:000000009f90f580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a74 [ 30.671266] memcg:ffff8880164c4301 [ 30.671682] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.672312] page_type: 0xffffffff() [ 30.672759] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.673664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164c4301 [ 30.674590] page dumped because: kasan: bad access detected [ 30.675245] [ 30.675460] Memory state around the buggy address: [ 30.676043] ffff888019a74680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.676897] ffff888019a74700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.677744] >ffff888019a74780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.678597] ^ [ 30.679084] ffff888019a74800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.679923] ffff888019a74880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.680732] ================================================================== [ 30.681801] Disabling lock debugging due to kernel taint [ 32.547349] BUG: Bad rss-counter state mm:000000001ca4605f type:MM_FILEPAGES val:33 [ 32.548361] BUG: Bad rss-counter state mm:000000001ca4605f type:MM_ANONPAGES val:22 [ 33.051691] BUG: Bad rss-counter state mm:000000000d3441e1 type:MM_FILEPAGES val:33 [ 33.052933] BUG: Bad rss-counter state mm:000000000d3441e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64092' (ECDSA) to the list of known hosts. 2023/06/20 13:53:47 fuzzer started 2023/06/20 13:53:47 dialing manager at localhost:36067 2023/06/20 13:53:47 checking machine... 2023/06/20 13:53:47 checking revisions... [ 33.794162] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:53:47 testing simple program... [ 33.838380] cgroup: Unknown subsys name 'net' [ 33.916240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:53:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11003338ee6 RCX=ffffffff8124cd7d RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800fab3680 RSP=ffff8880199c76e8 R8 =ffff88800fab3698 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000002 R13=ffff88800fab3f90 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8135b930 RFL=00000047 [---Z-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 00007fbab784c900 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=00007fbab7e01650 CR3=000000000dde0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff888008e07f50 RDI=ffff88806cf09aa8 RBP=ffff888008e07f50 RSP=ffff88806cf099f0 R8 =ffffffff86091f88 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=0000000000000008 R13=ffff888008e00000 R14=ffff888008e07f58 R15=ffff88806cf09a98 RIP=ffffffff81130468 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 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=00007fefff7c1210 CR3=000000000d704000 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=656a38c1717140bf264bfaaef7c7761b XMM02=000000000011a438ec2efd57dc4c00df XMM03=00000000001212a09cfd669e2865f763 XMM04=92ed1b00353a1f5000000000000ae988 XMM05=0b29485292d19f980000000000132180 XMM06=806171799158d9670000000000131220 XMM07=e042d86d42eb936e0000000000121520 XMM08=9cfd669e2865f763000000000011a498 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000