syzkaller login: [ 38.885678] BUG: Bad rss-counter state mm:0000000053fb8d77 type:MM_FILEPAGES val:33 [ 38.887080] BUG: Bad rss-counter state mm:0000000053fb8d77 type:MM_ANONPAGES val:22 [ 38.932585] ================================================================== [ 38.933663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.934778] Read of size 8 at addr ffff88801bb68d08 by task sshd/220 [ 38.935824] [ 38.936092] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.937132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.938307] Call Trace: [ 38.938696] [ 38.939055] dump_stack_lvl+0x91/0xf0 [ 38.939670] print_report+0xcc/0x620 [ 38.940271] ? __virt_addr_valid+0x102/0x340 [ 38.940987] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941762] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.942532] kasan_report+0xbe/0xf0 [ 38.943010] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.943648] vma_interval_tree_remove+0xc75/0xec0 [ 38.944253] vma_prepare+0xc54/0x11a0 [ 38.944735] __split_vma+0x5af/0x950 [ 38.945231] ? __pfx___split_vma+0x10/0x10 [ 38.945763] ? find_held_lock+0x2c/0x110 [ 38.946284] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.946847] ? lock_is_held_type+0x9f/0x120 [ 38.947391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.948005] ? mtree_range_walk+0x632/0x900 [ 38.948565] ? mas_walk+0x5c7/0x7c0 [ 38.949088] do_vmi_munmap+0x1f1/0x2b0 [ 38.949589] mmap_region+0x1f9/0x2660 [ 38.950075] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.950595] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.951311] ? __pfx_lock_acquire+0x10/0x10 [ 38.951844] ? __pfx_mmap_region+0x10/0x10 [ 38.952385] ? security_mmap_addr+0x7d/0xa0 [ 38.952923] ? get_unmapped_area+0x1f5/0x3f0 [ 38.953481] do_mmap+0x854/0xf00 [ 38.953921] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.954416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.954988] ksys_mmap_pgoff+0x3af/0x500 [ 38.955495] do_syscall_64+0x3f/0x90 [ 38.955976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956622] RIP: 0033:0x7f23fdf37d82 [ 38.957102] 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 [ 38.959211] RSP: 002b:00007ffc8f1f9ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.960117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23fdf37d82 [ 38.960979] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23fd371000 [ 38.961841] RBP: 00007f23fd371000 R08: 0000000000000009 R09: 0000000000001000 [ 38.962712] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4d25f9f70 [ 38.963583] R13: 00007ffc8f1f9f10 R14: 00007ffc8f1f9f40 R15: 00007ffc8f1fa2a0 [ 38.964472] [ 38.964771] [ 38.964998] Allocated by task 213: [ 38.965442] kasan_save_stack+0x22/0x50 [ 38.965947] kasan_set_track+0x25/0x30 [ 38.966454] __kasan_slab_alloc+0x59/0x70 [ 38.966985] kmem_cache_alloc+0x16b/0x370 [ 38.967501] vm_area_dup+0x20/0x160 [ 38.967959] __split_vma+0x170/0x950 [ 38.968429] split_vma+0xc6/0x110 [ 38.968887] mprotect_fixup+0x8d2/0xb30 [ 38.969404] do_mprotect_pkey+0x87e/0xd40 [ 38.969950] __x64_sys_mprotect+0x78/0xc0 [ 38.970475] do_syscall_64+0x3f/0x90 [ 38.970958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.971602] [ 38.971820] Freed by task 213: [ 38.972213] kasan_save_stack+0x22/0x50 [ 38.972719] kasan_set_track+0x25/0x30 [ 38.973226] kasan_save_free_info+0x2b/0x50 [ 38.973757] __kasan_slab_free+0x10a/0x190 [ 38.974297] kmem_cache_free+0x10d/0x4d0 [ 38.974803] rcu_core+0x8c8/0x2860 [ 38.975247] __do_softirq+0x1b7/0x7d4 [ 38.975727] [ 38.975943] Last potentially related work creation: [ 38.976627] kasan_save_stack+0x22/0x50 [ 38.977149] __kasan_record_aux_stack+0x8e/0xa0 [ 38.977731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.978377] remove_vma+0x139/0x170 [ 38.978833] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.979405] do_vmi_munmap+0x1f1/0x2b0 [ 38.979908] __vm_munmap+0x138/0x3a0 [ 38.980373] __x64_sys_munmap+0x59/0x80 [ 38.980894] do_syscall_64+0x3f/0x90 [ 38.981388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982072] [ 38.982294] The buggy address belongs to the object at ffff88801bb68cb0 [ 38.982294] which belongs to the cache vm_area_struct of size 168 [ 38.983799] The buggy address is located 88 bytes inside of [ 38.983799] freed 168-byte region [ffff88801bb68cb0, ffff88801bb68d58) [ 38.985246] [ 38.985468] The buggy address belongs to the physical page: [ 38.986143] page:0000000002b96713 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bb68 [ 38.987259] memcg:ffff88800eea9301 [ 38.987702] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.988355] page_type: 0xffffffff() [ 38.988806] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.989745] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eea9301 [ 38.990662] page dumped because: kasan: bad access detected [ 38.991331] [ 38.991550] Memory state around the buggy address: [ 38.992131] ffff88801bb68c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.993006] ffff88801bb68c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.993875] >ffff88801bb68d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.994723] ^ [ 38.995170] ffff88801bb68d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.996031] ffff88801bb68e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.996877] ================================================================== [ 38.997935] Disabling lock debugging due to kernel taint [ 41.534020] BUG: Bad rss-counter state mm:00000000081403f4 type:MM_FILEPAGES val:33 [ 41.535079] BUG: Bad rss-counter state mm:00000000081403f4 type:MM_ANONPAGES val:22 [ 41.934407] BUG: Bad rss-counter state mm:000000001d721829 type:MM_FILEPAGES val:33 [ 41.935398] BUG: Bad rss-counter state mm:000000001d721829 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8336' (ECDSA) to the list of known hosts. 2023/06/21 04:25:47 fuzzer started 2023/06/21 04:25:47 dialing manager at localhost:36067 2023/06/21 04:25:47 checking machine... 2023/06/21 04:25:47 checking revisions... [ 42.664840] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:25:48 testing simple program... [ 42.717761] cgroup: Unknown subsys name 'net' [ 42.754173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:25:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=ffff8880188b9b40 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100314ef54 RSP=ffff888018a77a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff844fea28 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007fd0e1de9900 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=00007fd0e23a0618 CR3=0000000010398000 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=00007fee6b121540 CR3=000000000c45e000 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=83570887fee70186644c653fab5cb7b0 XMM02=000000000011b248eff9b2d0a8fce9cb XMM03=000000000011b3182c67c8bc2e329bc3 XMM04=b399a1a33236f63100000000000ae988 XMM05=a9397305fd6dea6800000000001321e8 XMM06=4fda316b135da52b0000000000131b00 XMM07=e042d86d42eb936e0000000000122358 XMM08=17b2eaf555054eee000000000011b318 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000