syzkaller login: [ 30.733359] BUG: Bad rss-counter state mm:00000000f2d6c5ed type:MM_FILEPAGES val:33 [ 30.734606] BUG: Bad rss-counter state mm:00000000f2d6c5ed type:MM_ANONPAGES val:22 [ 30.772840] ================================================================== [ 30.773807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.774748] Read of size 8 at addr ffff8880169886b0 by task sshd/219 [ 30.775587] [ 30.775803] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.776658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.777647] Call Trace: [ 30.777970] [ 30.778253] dump_stack_lvl+0x91/0xf0 [ 30.778765] print_report+0xcc/0x620 [ 30.779250] ? __virt_addr_valid+0x102/0x340 [ 30.779800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780411] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781023] kasan_report+0xbe/0xf0 [ 30.781497] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782120] vma_interval_tree_remove+0xc75/0xec0 [ 30.782729] vma_prepare+0xc54/0x11a0 [ 30.783210] __split_vma+0x5af/0x950 [ 30.783675] ? __pfx___split_vma+0x10/0x10 [ 30.784206] ? find_held_lock+0x2c/0x110 [ 30.784722] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.785278] ? lock_is_held_type+0x9f/0x120 [ 30.785815] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.786440] ? mtree_range_walk+0x632/0x900 [ 30.786988] ? mas_walk+0x5c7/0x7c0 [ 30.787460] do_vmi_munmap+0x1f1/0x2b0 [ 30.787946] mmap_region+0x1f9/0x2660 [ 30.788422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.788925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.789636] ? __pfx_lock_acquire+0x10/0x10 [ 30.790167] ? __pfx_mmap_region+0x10/0x10 [ 30.790700] ? security_mmap_addr+0x7d/0xa0 [ 30.791229] ? get_unmapped_area+0x1f5/0x3f0 [ 30.791772] do_mmap+0x854/0xf00 [ 30.792205] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.792692] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.793249] ksys_mmap_pgoff+0x3af/0x500 [ 30.793750] do_syscall_64+0x3f/0x90 [ 30.794226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794885] RIP: 0033:0x7f74aba24d82 [ 30.795337] 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 [ 30.797450] RSP: 002b:00007ffe8ad12808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.798341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74aba24d82 [ 30.799199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74aae5e000 [ 30.800033] RBP: 00007f74aae5e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.800873] R10: 0000000000000812 R11: 0000000000000206 R12: 000056172ed61ec0 [ 30.801723] R13: 00007ffe8ad12820 R14: 00007ffe8ad12850 R15: 00007ffe8ad12bb0 [ 30.802578] [ 30.802869] [ 30.803082] Allocated by task 212: [ 30.803505] kasan_save_stack+0x22/0x50 [ 30.804007] kasan_set_track+0x25/0x30 [ 30.804493] __kasan_slab_alloc+0x59/0x70 [ 30.805015] kmem_cache_alloc+0x16b/0x370 [ 30.805524] vm_area_dup+0x20/0x160 [ 30.805973] __split_vma+0x170/0x950 [ 30.806454] split_vma+0xc6/0x110 [ 30.806895] mprotect_fixup+0x8d2/0xb30 [ 30.807390] do_mprotect_pkey+0x87e/0xd40 [ 30.807901] __x64_sys_mprotect+0x78/0xc0 [ 30.808415] do_syscall_64+0x3f/0x90 [ 30.808885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809523] [ 30.809736] Freed by task 212: [ 30.810123] kasan_save_stack+0x22/0x50 [ 30.810626] kasan_set_track+0x25/0x30 [ 30.811165] kasan_save_free_info+0x2b/0x50 [ 30.811717] __kasan_slab_free+0x10a/0x190 [ 30.812260] kmem_cache_free+0x10d/0x4d0 [ 30.812776] rcu_core+0x8c8/0x2860 [ 30.813205] __do_softirq+0x1b7/0x7d4 [ 30.813687] [ 30.813909] Last potentially related work creation: [ 30.814538] kasan_save_stack+0x22/0x50 [ 30.815042] __kasan_record_aux_stack+0x8e/0xa0 [ 30.815619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.816271] remove_vma+0x139/0x170 [ 30.816739] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817300] do_vmi_munmap+0x1f1/0x2b0 [ 30.817792] __vm_munmap+0x138/0x3a0 [ 30.818271] __x64_sys_munmap+0x59/0x80 [ 30.818778] do_syscall_64+0x3f/0x90 [ 30.819257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819917] [ 30.820131] Second to last potentially related work creation: [ 30.820805] kasan_save_stack+0x22/0x50 [ 30.821304] __kasan_record_aux_stack+0x8e/0xa0 [ 30.821878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.822539] remove_vma+0x139/0x170 [ 30.822989] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.823552] do_vmi_munmap+0x1f1/0x2b0 [ 30.824046] mmap_region+0x1f9/0x2660 [ 30.824526] do_mmap+0x854/0xf00 [ 30.824961] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.825445] ksys_mmap_pgoff+0x3af/0x500 [ 30.825942] do_syscall_64+0x3f/0x90 [ 30.826428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827068] [ 30.827285] The buggy address belongs to the object at ffff888016988658 [ 30.827285] which belongs to the cache vm_area_struct of size 168 [ 30.828779] The buggy address is located 88 bytes inside of [ 30.828779] freed 168-byte region [ffff888016988658, ffff888016988700) [ 30.830193] [ 30.830430] The buggy address belongs to the physical page: [ 30.831102] page:0000000025d6e9e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16988 [ 30.832220] memcg:ffff888018e2da01 [ 30.832653] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833357] page_type: 0xffffffff() [ 30.833814] raw: 0100000000000200 ffff8880087a0c80 ffffea0000368600 dead000000000003 [ 30.834760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e2da01 [ 30.835682] page dumped because: kasan: bad access detected [ 30.836350] [ 30.836569] Memory state around the buggy address: [ 30.837154] ffff888016988580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.838009] ffff888016988600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.838885] >ffff888016988680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.839735] ^ [ 30.840321] ffff888016988700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.841176] ffff888016988780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.842029] ================================================================== [ 30.843171] Disabling lock debugging due to kernel taint [ 32.634074] BUG: Bad rss-counter state mm:000000001b9bc8a9 type:MM_FILEPAGES val:33 [ 32.634762] BUG: Bad rss-counter state mm:000000001b9bc8a9 type:MM_ANONPAGES val:22 [ 33.147238] BUG: Bad rss-counter state mm:00000000a08970fa type:MM_FILEPAGES val:33 [ 33.148565] BUG: Bad rss-counter state mm:00000000a08970fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29992' (ECDSA) to the list of known hosts. 2023/06/21 02:27:33 fuzzer started 2023/06/21 02:27:33 dialing manager at localhost:36067 2023/06/21 02:27:33 checking machine... 2023/06/21 02:27:33 checking revisions... [ 33.857728] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:27:33 testing simple program... [ 33.913818] cgroup: Unknown subsys name 'net' [ 33.967631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:27:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc6117c4850 CR3=000000000d81e000 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=c3d667e272e798937643e80a705a433d XMM02=2c67c8bc2e329bc3000000000011b628 XMM03=fb795ef6d657705600000000001223a0 XMM04=a1ca73561375104100000000000ae988 XMM05=dfcdbad4f1609c370000000000133528 XMM06=f70ce42a99dc0bb20000000000132390 XMM07=e042d86d42eb936e0000000000122620 XMM08=07da1baa3972a459000000000011b688 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=ffff88800f900000 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019bef608 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007ff345498366 R13=0000000000000000 R14=ffff88800f900000 R15=0000000000000001 RIP=ffffffff814c089b 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 00007ff344fa5900 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=00007ffc2c9e5000 CR3=000000000ffe4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000