syzkaller login: [ 30.859666] BUG: Bad rss-counter state mm:00000000e51c1a1b type:MM_FILEPAGES val:33 [ 30.860909] BUG: Bad rss-counter state mm:00000000e51c1a1b type:MM_ANONPAGES val:22 [ 30.901149] ================================================================== [ 30.902175] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.903117] Read of size 8 at addr ffff888016db44e0 by task sshd/220 [ 30.903909] [ 30.904125] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.905017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.906042] Call Trace: [ 30.906360] [ 30.906644] dump_stack_lvl+0x91/0xf0 [ 30.907145] print_report+0xcc/0x620 [ 30.907634] ? __virt_addr_valid+0x102/0x340 [ 30.908187] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908814] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.909442] kasan_report+0xbe/0xf0 [ 30.909915] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.910548] vma_interval_tree_remove+0xc75/0xec0 [ 30.911161] vma_prepare+0xc54/0x11a0 [ 30.911648] __split_vma+0x5af/0x950 [ 30.912122] ? __pfx___split_vma+0x10/0x10 [ 30.912676] ? find_held_lock+0x2c/0x110 [ 30.913207] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.913766] ? lock_is_held_type+0x9f/0x120 [ 30.914300] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.914904] ? mtree_range_walk+0x632/0x900 [ 30.915460] ? mas_walk+0x5c7/0x7c0 [ 30.915942] do_vmi_munmap+0x1f1/0x2b0 [ 30.916440] mmap_region+0x1f9/0x2660 [ 30.916920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.917432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.918149] ? __pfx_lock_acquire+0x10/0x10 [ 30.918693] ? __pfx_mmap_region+0x10/0x10 [ 30.919233] ? security_mmap_addr+0x7d/0xa0 [ 30.919770] ? get_unmapped_area+0x1f5/0x3f0 [ 30.920330] do_mmap+0x854/0xf00 [ 30.920800] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.921296] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.921868] ksys_mmap_pgoff+0x3af/0x500 [ 30.922390] do_syscall_64+0x3f/0x90 [ 30.922885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.923544] RIP: 0033:0x7ff4b9aacd82 [ 30.924002] 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 [ 30.926142] RSP: 002b:00007ffe5c7a8218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.927327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4b9aacd82 [ 30.928174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4b8ee6000 [ 30.929068] RBP: 00007ff4b8ee6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.929912] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef4d5def70 [ 30.930757] R13: 00007ffe5c7a8230 R14: 00007ffe5c7a8260 R15: 00007ffe5c7a85c0 [ 30.931617] [ 30.931913] [ 30.932130] Allocated by task 213: [ 30.932561] kasan_save_stack+0x22/0x50 [ 30.933068] kasan_set_track+0x25/0x30 [ 30.933569] __kasan_slab_alloc+0x59/0x70 [ 30.934100] kmem_cache_alloc+0x16b/0x370 [ 30.934625] vm_area_dup+0x20/0x160 [ 30.935084] __split_vma+0x170/0x950 [ 30.935558] split_vma+0xc6/0x110 [ 30.936000] mprotect_fixup+0x8d2/0xb30 [ 30.936511] do_mprotect_pkey+0x87e/0xd40 [ 30.937030] __x64_sys_mprotect+0x78/0xc0 [ 30.937569] do_syscall_64+0x3f/0x90 [ 30.938044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938694] [ 30.938911] Freed by task 213: [ 30.939298] kasan_save_stack+0x22/0x50 [ 30.939801] kasan_set_track+0x25/0x30 [ 30.940293] kasan_save_free_info+0x2b/0x50 [ 30.940861] __kasan_slab_free+0x10a/0x190 [ 30.941389] kmem_cache_free+0x10d/0x4d0 [ 30.941902] rcu_core+0x8c8/0x2860 [ 30.942353] __do_softirq+0x1b7/0x7d4 [ 30.942834] [ 30.943047] Last potentially related work creation: [ 30.943632] kasan_save_stack+0x22/0x50 [ 30.944138] __kasan_record_aux_stack+0x8e/0xa0 [ 30.944721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.945366] remove_vma+0x139/0x170 [ 30.945825] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.946377] do_vmi_munmap+0x1f1/0x2b0 [ 30.946865] __vm_munmap+0x138/0x3a0 [ 30.947328] __x64_sys_munmap+0x59/0x80 [ 30.947836] do_syscall_64+0x3f/0x90 [ 30.948312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.948976] [ 30.949192] The buggy address belongs to the object at ffff888016db4488 [ 30.949192] which belongs to the cache vm_area_struct of size 168 [ 30.950664] The buggy address is located 88 bytes inside of [ 30.950664] freed 168-byte region [ffff888016db4488, ffff888016db4530) [ 30.952069] [ 30.952287] The buggy address belongs to the physical page: [ 30.952964] page:00000000eaabe3e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16db4 [ 30.954062] memcg:ffff888014756901 [ 30.954493] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.955194] page_type: 0xffffffff() [ 30.955643] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.956596] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014756901 [ 30.957499] page dumped because: kasan: bad access detected [ 30.958166] [ 30.958385] Memory state around the buggy address: [ 30.958978] ffff888016db4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.959840] ffff888016db4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.960708] >ffff888016db4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.961575] ^ [ 30.962321] ffff888016db4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.963173] ffff888016db4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.964032] ================================================================== [ 30.965350] Disabling lock debugging due to kernel taint [ 33.039418] BUG: Bad rss-counter state mm:000000007931856f type:MM_FILEPAGES val:33 [ 33.040597] BUG: Bad rss-counter state mm:000000007931856f type:MM_ANONPAGES val:22 [ 33.449601] BUG: Bad rss-counter state mm:000000009a9ee737 type:MM_FILEPAGES val:33 [ 33.450554] BUG: Bad rss-counter state mm:000000009a9ee737 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12033' (ECDSA) to the list of known hosts. 2023/06/20 20:12:28 fuzzer started 2023/06/20 20:12:28 dialing manager at localhost:36067 2023/06/20 20:12:28 checking machine... 2023/06/20 20:12:28 checking revisions... [ 34.172223] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:12:28 testing simple program... [ 34.214496] cgroup: Unknown subsys name 'net' [ 34.262954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:12:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88800f7c8000 RSI=ffffffff81967bd3 RDI=ffff888016d87bf0 RBP=ffff88800ff02028 RSP=ffff888016d87c58 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880102be000 R13=0000000000000002 R14=ffffffff856f0da0 R15=ffff88800ff02050 RIP=ffffffff81894d94 RFL=00000286 [--S--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 00007f2d54c0f900 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=00007f2d551c4650 CR3=000000000dce6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fa79c4ebc40 CR3=000000000cc4e000 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=ed3ddce63d4722ab2a4e188483d1b5f7 XMM02=000000000011a1c8ec2efd57dc4c00df XMM03=0000000000121b10c316c024b87b5717 XMM04=e1772822e1ac463000000000000ae988 XMM05=3b2de5c8176ec1e30000000000132740 XMM06=4fda316b135da52b00000000001317e0 XMM07=e042d86d42eb936e0000000000121d90 XMM08=c316c024b87b5717000000000011a228 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000