syzkaller login: [ 37.715370] BUG: Bad rss-counter state mm:00000000893c9030 type:MM_FILEPAGES val:33 [ 37.717006] BUG: Bad rss-counter state mm:00000000893c9030 type:MM_ANONPAGES val:22 [ 37.879187] ================================================================== [ 37.880098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.881037] Read of size 8 at addr ffff88800e1a7c20 by task sshd/219 [ 37.881820] [ 37.882039] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.883034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.884019] Call Trace: [ 37.884337] [ 37.884624] dump_stack_lvl+0x91/0xf0 [ 37.885122] print_report+0xcc/0x620 [ 37.885612] ? __virt_addr_valid+0x102/0x340 [ 37.886170] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.886826] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.887448] kasan_report+0xbe/0xf0 [ 37.887927] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.888552] vma_interval_tree_remove+0xc75/0xec0 [ 37.889154] vma_prepare+0xc54/0x11a0 [ 37.889648] __split_vma+0x5af/0x950 [ 37.890121] ? __pfx___split_vma+0x10/0x10 [ 37.890670] ? find_held_lock+0x2c/0x110 [ 37.891212] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.891797] ? lock_is_held_type+0x9f/0x120 [ 37.892343] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.892964] ? mtree_range_walk+0x632/0x900 [ 37.893522] ? mas_walk+0x5c7/0x7c0 [ 37.894004] do_vmi_munmap+0x1f1/0x2b0 [ 37.894515] mmap_region+0x1f9/0x2660 [ 37.895013] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.895529] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.896252] ? __pfx_lock_acquire+0x10/0x10 [ 37.896788] ? __pfx_mmap_region+0x10/0x10 [ 37.897320] ? security_mmap_addr+0x7d/0xa0 [ 37.897853] ? get_unmapped_area+0x1f5/0x3f0 [ 37.898407] do_mmap+0x854/0xf00 [ 37.898871] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.899369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.899945] ksys_mmap_pgoff+0x3af/0x500 [ 37.900459] do_syscall_64+0x3f/0x90 [ 37.900939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.901590] RIP: 0033:0x7f6ab3ec9d82 [ 37.902049] 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 [ 37.904207] RSP: 002b:00007ffe583ecb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.905119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ab3ec9d82 [ 37.906016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ab3303000 [ 37.906947] RBP: 00007f6ab3303000 R08: 0000000000000009 R09: 0000000000001000 [ 37.907858] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621ce0dcec0 [ 37.908778] R13: 00007ffe583ecb50 R14: 00007ffe583ecb80 R15: 00007ffe583ecee0 [ 37.909693] [ 37.910003] [ 37.910230] Allocated by task 212: [ 37.910698] kasan_save_stack+0x22/0x50 [ 37.911236] kasan_set_track+0x25/0x30 [ 37.911766] __kasan_slab_alloc+0x59/0x70 [ 37.912330] kmem_cache_alloc+0x16b/0x370 [ 37.912895] vm_area_dup+0x20/0x160 [ 37.913382] __split_vma+0x170/0x950 [ 37.913879] split_vma+0xc6/0x110 [ 37.914352] mprotect_fixup+0x8d2/0xb30 [ 37.914905] do_mprotect_pkey+0x87e/0xd40 [ 37.915458] __x64_sys_mprotect+0x78/0xc0 [ 37.916015] do_syscall_64+0x3f/0x90 [ 37.916519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.917203] [ 37.917434] Freed by task 212: [ 37.917863] kasan_save_stack+0x22/0x50 [ 37.918399] kasan_set_track+0x25/0x30 [ 37.918940] kasan_save_free_info+0x2b/0x50 [ 37.919516] __kasan_slab_free+0x10a/0x190 [ 37.920085] kmem_cache_free+0x10d/0x4d0 [ 37.920627] rcu_core+0x8c8/0x2860 [ 37.921099] __do_softirq+0x1b7/0x7d4 [ 37.921609] [ 37.921833] Last potentially related work creation: [ 37.922467] kasan_save_stack+0x22/0x50 [ 37.923016] __kasan_record_aux_stack+0x8e/0xa0 [ 37.923634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.924322] remove_vma+0x139/0x170 [ 37.924803] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.925400] do_vmi_munmap+0x1f1/0x2b0 [ 37.925924] __vm_munmap+0x138/0x3a0 [ 37.926422] __x64_sys_munmap+0x59/0x80 [ 37.926978] do_syscall_64+0x3f/0x90 [ 37.927486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.928170] [ 37.928404] The buggy address belongs to the object at ffff88800e1a7bc8 [ 37.928404] which belongs to the cache vm_area_struct of size 168 [ 37.929963] The buggy address is located 88 bytes inside of [ 37.929963] freed 168-byte region [ffff88800e1a7bc8, ffff88800e1a7c70) [ 37.931415] [ 37.931634] The buggy address belongs to the physical page: [ 37.932314] page:00000000d770366d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a7 [ 37.933401] memcg:ffff888016e8a401 [ 37.933837] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.934492] page_type: 0xffffffff() [ 37.934958] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.935887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e8a401 [ 37.936802] page dumped because: kasan: bad access detected [ 37.937466] [ 37.937691] Memory state around the buggy address: [ 37.938274] ffff88800e1a7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.939132] ffff88800e1a7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.939993] >ffff88800e1a7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.940854] ^ [ 37.941391] ffff88800e1a7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.942256] ffff88800e1a7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.943137] ================================================================== [ 37.944122] Disabling lock debugging due to kernel taint [ 39.868548] BUG: Bad rss-counter state mm:000000007fe6a75e type:MM_FILEPAGES val:33 [ 39.870507] BUG: Bad rss-counter state mm:000000007fe6a75e type:MM_ANONPAGES val:22 [ 40.417184] BUG: Bad rss-counter state mm:00000000df747289 type:MM_FILEPAGES val:33 [ 40.418512] BUG: Bad rss-counter state mm:00000000df747289 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32117' (ECDSA) to the list of known hosts. 2023/06/19 15:02:00 fuzzer started 2023/06/19 15:02:00 dialing manager at localhost:44161 2023/06/19 15:02:00 checking machine... 2023/06/19 15:02:00 checking revisions... [ 41.038055] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:02:00 testing simple program... [ 41.079813] cgroup: Unknown subsys name 'net' [ 41.119643] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:01:52 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00000000000002ff RCX=ffffffff836554ce RDX=0000000000000301 RSI=00000000000002ff RDI=0000000000000004 RBP=ffff88801a1f5800 RSP=ffff8880146f7870 R8 =0000000000000004 R9 =00000000000002ff R10=0000000000000301 R11=00000000000b6996 R12=0000000000000301 R13=ffff88801a1f5860 R14=0000000000000000 R15=ffff88801a1f5a74 RIP=ffffffff814c01d0 RFL=00000203 [------C] 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 00007f5505175900 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=00007ffb3a761650 CR3=00000000099f0000 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=f0201197aaea06bbb849b89a40a9ac45 XMM02=000000000011cac8eff9b2d0a8fce9cb XMM03=000000000011cb982c67c8bc2e329bc3 XMM04=a017766ba819b82600000000000ae988 XMM05=4980689cf55ae7240000000000134c60 XMM06=806171799158d9670000000000133a50 XMM07=fb795ef6d65770560000000000123da8 XMM08=2c67c8bc2e329bc3000000000011cb38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff818470dc RDI=ffff88800844f780 RBP=ffff8880197dfc98 RSP=ffff8880197dfc40 R8 =ffff8880197dfc60 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=ffff888015de3850 R14=0000000000000000 R15=0000000000092c40 RIP=ffffffff8135b929 RFL=00000202 [-------] 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 00007ffb3a1ac900 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=00007ffb3a763618 CR3=000000001ce00000 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=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