syzkaller login: [ 38.719980] BUG: Bad rss-counter state mm:00000000b036afa8 type:MM_FILEPAGES val:33 [ 38.721202] BUG: Bad rss-counter state mm:00000000b036afa8 type:MM_ANONPAGES val:22 [ 38.854967] ================================================================== [ 38.855915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.856860] Read of size 8 at addr ffff88800ed0d228 by task sshd/225 [ 38.857629] [ 38.857854] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.858861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.859869] Call Trace: [ 38.860195] [ 38.860483] dump_stack_lvl+0x91/0xf0 [ 38.861004] print_report+0xcc/0x620 [ 38.861495] ? __virt_addr_valid+0x102/0x340 [ 38.862056] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.862684] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.863340] kasan_report+0xbe/0xf0 [ 38.863829] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.864463] vma_interval_tree_remove+0xc75/0xec0 [ 38.865082] vma_prepare+0xc54/0x11a0 [ 38.865567] __split_vma+0x5af/0x950 [ 38.866049] ? __pfx___split_vma+0x10/0x10 [ 38.866582] ? find_held_lock+0x2c/0x110 [ 38.867126] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.867702] ? lock_is_held_type+0x9f/0x120 [ 38.868245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.868864] ? mtree_range_walk+0x632/0x900 [ 38.869422] ? mas_walk+0x5c7/0x7c0 [ 38.869915] do_vmi_munmap+0x1f1/0x2b0 [ 38.870414] mmap_region+0x1f9/0x2660 [ 38.870904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.871435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.872155] ? __pfx_lock_acquire+0x10/0x10 [ 38.872704] ? __pfx_mmap_region+0x10/0x10 [ 38.873240] ? security_mmap_addr+0x7d/0xa0 [ 38.873787] ? get_unmapped_area+0x1f5/0x3f0 [ 38.874346] do_mmap+0x854/0xf00 [ 38.874803] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.875319] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.875892] ksys_mmap_pgoff+0x3af/0x500 [ 38.876411] do_syscall_64+0x3f/0x90 [ 38.876904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877566] RIP: 0033:0x7f8e6dd16d82 [ 38.878029] 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 [ 38.880187] RSP: 002b:00007ffe4b25d9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.881109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e6dd16d82 [ 38.881962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e6d150000 [ 38.882815] RBP: 00007f8e6d150000 R08: 0000000000000009 R09: 0000000000001000 [ 38.883692] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4a8186d90 [ 38.884549] R13: 00007ffe4b25d9e0 R14: 00007ffe4b25da10 R15: 00007ffe4b25dd70 [ 38.885423] [ 38.885719] [ 38.885941] Allocated by task 218: [ 38.886378] kasan_save_stack+0x22/0x50 [ 38.886883] kasan_set_track+0x25/0x30 [ 38.887393] __kasan_slab_alloc+0x59/0x70 [ 38.887932] kmem_cache_alloc+0x16b/0x370 [ 38.888451] vm_area_dup+0x20/0x160 [ 38.888917] __split_vma+0x170/0x950 [ 38.889408] split_vma+0xc6/0x110 [ 38.889858] mprotect_fixup+0x8d2/0xb30 [ 38.890371] do_mprotect_pkey+0x87e/0xd40 [ 38.890895] __x64_sys_mprotect+0x78/0xc0 [ 38.891447] do_syscall_64+0x3f/0x90 [ 38.891922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892569] [ 38.892785] Freed by task 218: [ 38.893182] kasan_save_stack+0x22/0x50 [ 38.893691] kasan_set_track+0x25/0x30 [ 38.894191] kasan_save_free_info+0x2b/0x50 [ 38.894731] __kasan_slab_free+0x10a/0x190 [ 38.895280] kmem_cache_free+0x10d/0x4d0 [ 38.895791] rcu_core+0x8c8/0x2860 [ 38.896246] __do_softirq+0x1b7/0x7d4 [ 38.896730] [ 38.896954] Last potentially related work creation: [ 38.897546] kasan_save_stack+0x22/0x50 [ 38.898058] __kasan_record_aux_stack+0x8e/0xa0 [ 38.898637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.899294] remove_vma+0x139/0x170 [ 38.899749] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.900419] do_vmi_munmap+0x1f1/0x2b0 [ 38.900916] __vm_munmap+0x138/0x3a0 [ 38.901387] __x64_sys_munmap+0x59/0x80 [ 38.901887] do_syscall_64+0x3f/0x90 [ 38.902372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903030] [ 38.903268] The buggy address belongs to the object at ffff88800ed0d1d0 [ 38.903268] which belongs to the cache vm_area_struct of size 168 [ 38.904751] The buggy address is located 88 bytes inside of [ 38.904751] freed 168-byte region [ffff88800ed0d1d0, ffff88800ed0d278) [ 38.906161] [ 38.906378] The buggy address belongs to the physical page: [ 38.907053] page:00000000f126a098 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed0d [ 38.908138] memcg:ffff88800e0e7501 [ 38.908572] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.909226] page_type: 0xffffffff() [ 38.909683] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.910612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e7501 [ 38.911576] page dumped because: kasan: bad access detected [ 38.912248] [ 38.912465] Memory state around the buggy address: [ 38.913057] ffff88800ed0d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.913918] ffff88800ed0d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.914792] >ffff88800ed0d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.915670] ^ [ 38.916241] ffff88800ed0d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.917111] ffff88800ed0d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.917971] ================================================================== [ 38.918893] Disabling lock debugging due to kernel taint [ 41.068482] BUG: Bad rss-counter state mm:0000000049e6a50a type:MM_FILEPAGES val:33 [ 41.069931] BUG: Bad rss-counter state mm:0000000049e6a50a type:MM_ANONPAGES val:22 [ 41.603689] BUG: Bad rss-counter state mm:000000004611495a type:MM_FILEPAGES val:33 [ 41.604829] BUG: Bad rss-counter state mm:000000004611495a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29631' (ECDSA) to the list of known hosts. 2023/06/20 20:12:35 fuzzer started 2023/06/20 20:12:36 dialing manager at localhost:36067 2023/06/20 20:12:36 checking machine... 2023/06/20 20:12:36 checking revisions... [ 42.323949] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:12:36 testing simple program... [ 42.375187] cgroup: Unknown subsys name 'net' [ 42.432145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:12:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810727 RSP=ffff88806ce09df8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea0000661b00 R14=ffffffff813782f8 R15=ffff88800e5b9300 RIP=ffffffff815343fe 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 00007fb09eca6900 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=00007fb09f25d618 CR3=000000000ee38000 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=0000000000000001 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=00007f0172c7bcd0 CR3=000000000d78e000 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=a975fabe5e131284ed453a7d92baaaef XMM02=000000000011aa40ec2efd57dc4c00df XMM03=00000000001214009056c7b2b8aa5903 XMM04=7f813c7d06043bf000000000000ae988 XMM05=e7a3b750822471340000000000130fa0 XMM06=1bdabef5d518dae70000000000130178 XMM07=e042d86d42eb936e0000000000121680 XMM08=9056c7b2b8aa5903000000000011aaa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000