syzkaller login: [ 35.280316] BUG: Bad rss-counter state mm:00000000ddb9935d type:MM_FILEPAGES val:33 [ 35.281585] BUG: Bad rss-counter state mm:00000000ddb9935d type:MM_ANONPAGES val:22 [ 35.433360] ================================================================== [ 35.434273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.435209] Read of size 8 at addr ffff888006836c20 by task sshd/219 [ 35.435975] [ 35.436280] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.437136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.438106] Call Trace: [ 35.438426] [ 35.438706] dump_stack_lvl+0x91/0xf0 [ 35.439198] print_report+0xcc/0x620 [ 35.439680] ? __virt_addr_valid+0x102/0x340 [ 35.440227] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.440852] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.441467] kasan_report+0xbe/0xf0 [ 35.441940] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.442559] vma_interval_tree_remove+0xc75/0xec0 [ 35.443161] vma_prepare+0xc54/0x11a0 [ 35.443637] __split_vma+0x5af/0x950 [ 35.444105] ? __pfx___split_vma+0x10/0x10 [ 35.444631] ? find_held_lock+0x2c/0x110 [ 35.445170] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.445735] ? lock_is_held_type+0x9f/0x120 [ 35.446271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.446874] ? mtree_range_walk+0x632/0x900 [ 35.447424] ? mas_walk+0x5c7/0x7c0 [ 35.447897] do_vmi_munmap+0x1f1/0x2b0 [ 35.448385] mmap_region+0x1f9/0x2660 [ 35.448881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.449392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.450106] ? __pfx_lock_acquire+0x10/0x10 [ 35.450634] ? __pfx_mmap_region+0x10/0x10 [ 35.451164] ? security_mmap_addr+0x7d/0xa0 [ 35.451694] ? get_unmapped_area+0x1f5/0x3f0 [ 35.452239] do_mmap+0x854/0xf00 [ 35.452676] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.453179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.453740] ksys_mmap_pgoff+0x3af/0x500 [ 35.454245] do_syscall_64+0x3f/0x90 [ 35.454722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.455363] RIP: 0033:0x7fc9f24e0d82 [ 35.455819] 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 [ 35.457960] RSP: 002b:00007ffee61cb438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.458865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9f24e0d82 [ 35.459719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9f191a000 [ 35.460564] RBP: 00007fc9f191a000 R08: 0000000000000009 R09: 0000000000001000 [ 35.461417] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d52615bec0 [ 35.462259] R13: 00007ffee61cb450 R14: 00007ffee61cb480 R15: 00007ffee61cb7e0 [ 35.463114] [ 35.463406] [ 35.463621] Allocated by task 212: [ 35.464049] kasan_save_stack+0x22/0x50 [ 35.464550] kasan_set_track+0x25/0x30 [ 35.465054] __kasan_slab_alloc+0x59/0x70 [ 35.465576] kmem_cache_alloc+0x16b/0x370 [ 35.466094] vm_area_dup+0x20/0x160 [ 35.466542] __split_vma+0x170/0x950 [ 35.467007] split_vma+0xc6/0x110 [ 35.467444] mprotect_fixup+0x8d2/0xb30 [ 35.467946] do_mprotect_pkey+0x87e/0xd40 [ 35.468471] __x64_sys_mprotect+0x78/0xc0 [ 35.468997] do_syscall_64+0x3f/0x90 [ 35.469470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.470105] [ 35.470320] Freed by task 212: [ 35.470711] kasan_save_stack+0x22/0x50 [ 35.471215] kasan_set_track+0x25/0x30 [ 35.471704] kasan_save_free_info+0x2b/0x50 [ 35.472233] __kasan_slab_free+0x10a/0x190 [ 35.472764] kmem_cache_free+0x10d/0x4d0 [ 35.473295] rcu_core+0x8c8/0x2860 [ 35.473736] __do_softirq+0x1b7/0x7d4 [ 35.474209] [ 35.474421] Last potentially related work creation: [ 35.475008] kasan_save_stack+0x22/0x50 [ 35.475510] __kasan_record_aux_stack+0x8e/0xa0 [ 35.476087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.476724] remove_vma+0x139/0x170 [ 35.477186] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.477744] do_vmi_munmap+0x1f1/0x2b0 [ 35.478224] __vm_munmap+0x138/0x3a0 [ 35.478689] __x64_sys_munmap+0x59/0x80 [ 35.479179] do_syscall_64+0x3f/0x90 [ 35.479657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.480300] [ 35.480514] The buggy address belongs to the object at ffff888006836bc8 [ 35.480514] which belongs to the cache vm_area_struct of size 168 [ 35.481989] The buggy address is located 88 bytes inside of [ 35.481989] freed 168-byte region [ffff888006836bc8, ffff888006836c70) [ 35.483384] [ 35.483602] The buggy address belongs to the physical page: [ 35.484262] page:00000000d71a9f71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6836 [ 35.485359] memcg:ffff888006830201 [ 35.485785] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.486436] page_type: 0xffffffff() [ 35.486884] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.487804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006830201 [ 35.488710] page dumped because: kasan: bad access detected [ 35.489377] [ 35.489592] Memory state around the buggy address: [ 35.490172] ffff888006836b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.491030] ffff888006836b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.491887] >ffff888006836c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.492745] ^ [ 35.493295] ffff888006836c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.494154] ffff888006836d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.495007] ================================================================== [ 35.496002] Disabling lock debugging due to kernel taint [ 37.493179] BUG: Bad rss-counter state mm:00000000f6dad789 type:MM_FILEPAGES val:33 [ 37.494340] BUG: Bad rss-counter state mm:00000000f6dad789 type:MM_ANONPAGES val:22 [ 37.955047] BUG: Bad rss-counter state mm:000000000f6494b5 type:MM_FILEPAGES val:33 [ 37.956286] BUG: Bad rss-counter state mm:000000000f6494b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38987' (ECDSA) to the list of known hosts. 2023/06/19 11:43:22 fuzzer started 2023/06/19 11:43:22 dialing manager at localhost:44161 2023/06/19 11:43:22 checking machine... 2023/06/19 11:43:22 checking revisions... [ 38.643079] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:43:22 testing simple program... [ 38.696283] cgroup: Unknown subsys name 'net' [ 38.742586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:17 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=0000000000000000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800f07f868 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88801aac37b0 R13=ffff88801aac3760 R14=ffffffff83677d2f R15=ffff88800db15180 RIP=ffffffff8180ef1a RFL=00000082 [--S----] 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 00007f9232ddb700 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=00007f7bb7ec94f0 CR3=0000000019c9a000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34353530362074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343535 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000280 RBX=ffff88800b386788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800b3867c0 RBP=ffff88800c974300 RSP=ffff88801cdc76f8 R8 =0000000000000001 R9 =ffffed10039b8ed3 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800c974300 R14=ffffffff83677d48 R15=ffff88801a9e2600 RIP=ffffffff8184638b RFL=00000046 [---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 00007fb7dc011900 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=00007fb7dc5c8618 CR3=000000000f7e4000 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