syzkaller login: [ 31.100928] BUG: Bad rss-counter state mm:00000000d0cd0ef2 type:MM_FILEPAGES val:33 [ 31.102028] BUG: Bad rss-counter state mm:00000000d0cd0ef2 type:MM_ANONPAGES val:22 [ 31.262257] ================================================================== [ 31.263435] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.264641] Read of size 8 at addr ffff88800e265058 by task sshd/221 [ 31.265756] [ 31.266040] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.266974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.268036] Call Trace: [ 31.268383] [ 31.268687] dump_stack_lvl+0x91/0xf0 [ 31.269241] print_report+0xcc/0x620 [ 31.269766] ? __virt_addr_valid+0x102/0x340 [ 31.270369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271715] kasan_report+0xbe/0xf0 [ 31.272226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272894] vma_interval_tree_remove+0xc75/0xec0 [ 31.273547] vma_prepare+0xc54/0x11a0 [ 31.274062] __split_vma+0x5af/0x950 [ 31.274580] ? __pfx___split_vma+0x10/0x10 [ 31.275144] ? find_held_lock+0x2c/0x110 [ 31.275702] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.276305] ? lock_is_held_type+0x9f/0x120 [ 31.276886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.277554] ? mtree_range_walk+0x632/0x900 [ 31.278147] ? mas_walk+0x5c7/0x7c0 [ 31.278664] do_vmi_munmap+0x1f1/0x2b0 [ 31.279189] mmap_region+0x1f9/0x2660 [ 31.279721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.280275] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.281041] ? __pfx_lock_acquire+0x10/0x10 [ 31.281632] ? __pfx_mmap_region+0x10/0x10 [ 31.282205] ? security_mmap_addr+0x7d/0xa0 [ 31.282775] ? get_unmapped_area+0x1f5/0x3f0 [ 31.283366] do_mmap+0x854/0xf00 [ 31.283838] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.284371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.284969] ksys_mmap_pgoff+0x3af/0x500 [ 31.285535] do_syscall_64+0x3f/0x90 [ 31.286039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286738] RIP: 0033:0x7f54493aad82 [ 31.287242] 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 [ 31.289539] RSP: 002b:00007fff45c94678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.290503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54493aad82 [ 31.291410] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54487e4000 [ 31.292322] RBP: 00007f54487e4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.293236] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ddfd4af70 [ 31.294146] R13: 00007fff45c94690 R14: 00007fff45c946c0 R15: 00007fff45c94a20 [ 31.295077] [ 31.295397] [ 31.295625] Allocated by task 214: [ 31.296084] kasan_save_stack+0x22/0x50 [ 31.296622] kasan_set_track+0x25/0x30 [ 31.297176] __kasan_slab_alloc+0x59/0x70 [ 31.297744] kmem_cache_alloc+0x16b/0x370 [ 31.298298] vm_area_dup+0x20/0x160 [ 31.298791] __split_vma+0x170/0x950 [ 31.299299] split_vma+0xc6/0x110 [ 31.299768] mprotect_fixup+0x8d2/0xb30 [ 31.300311] do_mprotect_pkey+0x87e/0xd40 [ 31.300871] __x64_sys_mprotect+0x78/0xc0 [ 31.301451] do_syscall_64+0x3f/0x90 [ 31.301956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302645] [ 31.302876] Freed by task 214: [ 31.303297] kasan_save_stack+0x22/0x50 [ 31.303835] kasan_set_track+0x25/0x30 [ 31.304367] kasan_save_free_info+0x2b/0x50 [ 31.304936] __kasan_slab_free+0x10a/0x190 [ 31.305531] kmem_cache_free+0x10d/0x4d0 [ 31.306114] rcu_core+0x8c8/0x2860 [ 31.306589] __do_softirq+0x1b7/0x7d4 [ 31.307104] [ 31.307339] Last potentially related work creation: [ 31.307976] kasan_save_stack+0x22/0x50 [ 31.308527] __kasan_record_aux_stack+0x8e/0xa0 [ 31.309161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309852] remove_vma+0x139/0x170 [ 31.310345] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.310936] do_vmi_munmap+0x1f1/0x2b0 [ 31.311467] __vm_munmap+0x138/0x3a0 [ 31.311963] __x64_sys_munmap+0x59/0x80 [ 31.312496] do_syscall_64+0x3f/0x90 [ 31.313006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313713] [ 31.313943] The buggy address belongs to the object at ffff88800e265000 [ 31.313943] which belongs to the cache vm_area_struct of size 168 [ 31.315516] The buggy address is located 88 bytes inside of [ 31.315516] freed 168-byte region [ffff88800e265000, ffff88800e2650a8) [ 31.317026] [ 31.317280] The buggy address belongs to the physical page: [ 31.317991] page:000000002977b896 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe265 [ 31.319155] memcg:ffff88800d2f1701 [ 31.319618] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.320322] page_type: 0xffffffff() [ 31.320804] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.321807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2f1701 [ 31.322781] page dumped because: kasan: bad access detected [ 31.323489] [ 31.323723] Memory state around the buggy address: [ 31.324347] ffff88800e264f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.325280] ffff88800e264f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.326200] >ffff88800e265000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.327106] ^ [ 31.327888] ffff88800e265080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.328798] ffff88800e265100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.329721] ================================================================== [ 31.330710] Disabling lock debugging due to kernel taint [ 33.248683] BUG: Bad rss-counter state mm:00000000bff5beb2 type:MM_FILEPAGES val:33 [ 33.250214] BUG: Bad rss-counter state mm:00000000bff5beb2 type:MM_ANONPAGES val:22 [ 33.791399] BUG: Bad rss-counter state mm:000000004ada0f19 type:MM_FILEPAGES val:33 [ 33.792734] BUG: Bad rss-counter state mm:000000004ada0f19 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57175' (ECDSA) to the list of known hosts. 2023/06/20 17:39:47 fuzzer started 2023/06/20 17:39:47 dialing manager at localhost:36067 2023/06/20 17:39:47 checking machine... 2023/06/20 17:39:47 checking revisions... [ 34.449707] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:39:47 testing simple program... [ 34.497686] cgroup: Unknown subsys name 'net' [ 34.557632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:39:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e6 RCX=1ffff11001cb2eec RDX=0000000000000010 RSI=ffff888019f62300 RDI=ffff88800e5977fc RBP=0000000000000800 RSP=ffff888016f7fc08 R8 =0000000000000001 R9 =ffff88800e5977fc R10=ffff88800e5977b3 R11=00000000000b6a61 R12=ffff88801654f000 R13=0000000000000000 R14=ffff88800e5977fc R15=ffff88800e597720 RIP=ffffffff844d8b3d RFL=00000286 [--S--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 00007f96ca1d2900 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=00007ffe51c2a000 CR3=000000000f03a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8186b834 RDX=00000000000086b8 RSI=00000000000086b8 RDI=ffffffff8650b4d0 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 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=00007f0766eaf000 CR3=000000000daa2000 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=39333a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383438 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000