syzkaller login: [ 30.795337] BUG: Bad rss-counter state mm:00000000f1029484 type:MM_FILEPAGES val:33 [ 30.796850] BUG: Bad rss-counter state mm:00000000f1029484 type:MM_ANONPAGES val:22 [ 30.941046] ================================================================== [ 30.941943] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.942898] Read of size 8 at addr ffff88800dc03310 by task sshd/220 [ 30.943661] [ 30.943878] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.944902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.945874] Call Trace: [ 30.946196] [ 30.946482] dump_stack_lvl+0x91/0xf0 [ 30.946999] print_report+0xcc/0x620 [ 30.947486] ? __virt_addr_valid+0x102/0x340 [ 30.948037] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948664] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.949280] kasan_report+0xbe/0xf0 [ 30.949755] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.950370] vma_interval_tree_remove+0xc75/0xec0 [ 30.950978] vma_prepare+0xc54/0x11a0 [ 30.951460] __split_vma+0x5af/0x950 [ 30.951930] ? __pfx___split_vma+0x10/0x10 [ 30.952463] ? find_held_lock+0x2c/0x110 [ 30.953002] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.953580] ? lock_is_held_type+0x9f/0x120 [ 30.954127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.954743] ? mtree_range_walk+0x632/0x900 [ 30.955299] ? mas_walk+0x5c7/0x7c0 [ 30.955780] do_vmi_munmap+0x1f1/0x2b0 [ 30.956280] mmap_region+0x1f9/0x2660 [ 30.956793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.957316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.958048] ? __pfx_lock_acquire+0x10/0x10 [ 30.958592] ? __pfx_mmap_region+0x10/0x10 [ 30.959130] ? security_mmap_addr+0x7d/0xa0 [ 30.959676] ? get_unmapped_area+0x1f5/0x3f0 [ 30.960240] do_mmap+0x854/0xf00 [ 30.960695] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.961204] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.961789] ksys_mmap_pgoff+0x3af/0x500 [ 30.962309] do_syscall_64+0x3f/0x90 [ 30.962803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.963482] RIP: 0033:0x7f2dd8239d82 [ 30.963956] 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 [ 30.966155] RSP: 002b:00007ffcf86c63b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.967082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2dd8239d82 [ 30.967955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2dd7673000 [ 30.968847] RBP: 00007f2dd7673000 R08: 0000000000000009 R09: 0000000000001000 [ 30.969721] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560622cc4f70 [ 30.970593] R13: 00007ffcf86c63d0 R14: 00007ffcf86c6400 R15: 00007ffcf86c6760 [ 30.971481] [ 30.971774] [ 30.971993] Allocated by task 213: [ 30.972434] kasan_save_stack+0x22/0x50 [ 30.972963] kasan_set_track+0x25/0x30 [ 30.973474] __kasan_slab_alloc+0x59/0x70 [ 30.974011] kmem_cache_alloc+0x16b/0x370 [ 30.974537] vm_area_dup+0x20/0x160 [ 30.974998] __split_vma+0x170/0x950 [ 30.975472] split_vma+0xc6/0x110 [ 30.975921] mprotect_fixup+0x8d2/0xb30 [ 30.976446] do_mprotect_pkey+0x87e/0xd40 [ 30.976988] __x64_sys_mprotect+0x78/0xc0 [ 30.977530] do_syscall_64+0x3f/0x90 [ 30.978014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.978671] [ 30.978890] Freed by task 213: [ 30.979294] kasan_save_stack+0x22/0x50 [ 30.979808] kasan_set_track+0x25/0x30 [ 30.980321] kasan_save_free_info+0x2b/0x50 [ 30.980878] __kasan_slab_free+0x10a/0x190 [ 30.981429] kmem_cache_free+0x10d/0x4d0 [ 30.981951] rcu_core+0x8c8/0x2860 [ 30.982414] __do_softirq+0x1b7/0x7d4 [ 30.982905] [ 30.983124] Last potentially related work creation: [ 30.983729] kasan_save_stack+0x22/0x50 [ 30.984245] __kasan_record_aux_stack+0x8e/0xa0 [ 30.984865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.985524] remove_vma+0x139/0x170 [ 30.986064] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.986648] do_vmi_munmap+0x1f1/0x2b0 [ 30.987141] __vm_munmap+0x138/0x3a0 [ 30.987621] __x64_sys_munmap+0x59/0x80 [ 30.988152] do_syscall_64+0x3f/0x90 [ 30.988640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.989312] [ 30.989530] The buggy address belongs to the object at ffff88800dc032b8 [ 30.989530] which belongs to the cache vm_area_struct of size 168 [ 30.991031] The buggy address is located 88 bytes inside of [ 30.991031] freed 168-byte region [ffff88800dc032b8, ffff88800dc03360) [ 30.992482] [ 30.992720] The buggy address belongs to the physical page: [ 30.993406] page:00000000d95d600a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc03 [ 30.994526] memcg:ffff88800c529a01 [ 30.994962] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.995630] page_type: 0xffffffff() [ 30.996087] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.997033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c529a01 [ 30.997947] page dumped because: kasan: bad access detected [ 30.998618] [ 30.998840] Memory state around the buggy address: [ 30.999422] ffff88800dc03200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.000305] ffff88800dc03280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.001182] >ffff88800dc03300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.002054] ^ [ 31.002534] ffff88800dc03380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.003410] ffff88800dc03400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.004283] ================================================================== [ 31.005258] Disabling lock debugging due to kernel taint [ 32.971845] BUG: Bad rss-counter state mm:00000000ea2a5841 type:MM_FILEPAGES val:33 [ 32.973454] BUG: Bad rss-counter state mm:00000000ea2a5841 type:MM_ANONPAGES val:22 [ 33.437974] BUG: Bad rss-counter state mm:00000000ae568d01 type:MM_FILEPAGES val:33 [ 33.438957] BUG: Bad rss-counter state mm:00000000ae568d01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31257' (ECDSA) to the list of known hosts. 2023/06/20 11:49:35 fuzzer started 2023/06/20 11:49:35 dialing manager at localhost:36067 2023/06/20 11:49:35 checking machine... 2023/06/20 11:49:35 checking revisions... [ 34.202938] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:49:36 testing simple program... [ 34.270667] cgroup: Unknown subsys name 'net' [ 34.331931] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:49:35 Registers: info registers vcpu 0 RAX=0000000000010000 RBX=0000000000000001 RCX=ffffffff813c0802 RDX=ffff88800f553680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce2ba08 RSP=ffff88806ce09e40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88806ce2c250 R13=ffff88806ce2b940 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff814c086b RFL=00000002 [-------] 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 00007efd00fed900 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=00007efd015a4618 CR3=000000000eed2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f83b11a14d0 CR3=000000000c704000 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=184a485a3e83498f25438a8dabfb2a8e XMM02=0000000000120018eff9b2d0a8fce9cb XMM03=00000000001200e82c67c8bc2e329bc3 XMM04=d42c0c84ef42a0ae00000000000ae988 XMM05=918dc05d8de03f8b0000000000133510 XMM06=4fda316b135da52b0000000000132f08 XMM07=e042d86d42eb936e0000000000123bd8 XMM08=6779c8a82f4e8cd700000000001200e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000