syzkaller login: [ 38.693328] BUG: Bad rss-counter state mm:00000000022e1679 type:MM_FILEPAGES val:33 [ 38.694608] BUG: Bad rss-counter state mm:00000000022e1679 type:MM_ANONPAGES val:22 [ 38.877199] ================================================================== [ 38.878107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.879054] Read of size 8 at addr ffff888016c1a310 by task sshd/221 [ 38.879840] [ 38.880154] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.881032] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.882011] Call Trace: [ 38.882346] [ 38.882630] dump_stack_lvl+0x91/0xf0 [ 38.883121] print_report+0xcc/0x620 [ 38.883630] ? __virt_addr_valid+0x102/0x340 [ 38.884192] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884812] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885427] kasan_report+0xbe/0xf0 [ 38.885902] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886529] vma_interval_tree_remove+0xc75/0xec0 [ 38.887134] vma_prepare+0xc54/0x11a0 [ 38.887623] __split_vma+0x5af/0x950 [ 38.888101] ? __pfx___split_vma+0x10/0x10 [ 38.888624] ? find_held_lock+0x2c/0x110 [ 38.889142] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.889708] ? lock_is_held_type+0x9f/0x120 [ 38.890266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.890875] ? mtree_range_walk+0x632/0x900 [ 38.891433] ? mas_walk+0x5c7/0x7c0 [ 38.891909] do_vmi_munmap+0x1f1/0x2b0 [ 38.892402] mmap_region+0x1f9/0x2660 [ 38.892887] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.893396] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.894103] ? __pfx_lock_acquire+0x10/0x10 [ 38.894639] ? __pfx_mmap_region+0x10/0x10 [ 38.895171] ? security_mmap_addr+0x7d/0xa0 [ 38.895725] ? get_unmapped_area+0x1f5/0x3f0 [ 38.896275] do_mmap+0x854/0xf00 [ 38.896712] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.897211] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.897780] ksys_mmap_pgoff+0x3af/0x500 [ 38.898287] do_syscall_64+0x3f/0x90 [ 38.898762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899423] RIP: 0033:0x7f72a8247d82 [ 38.899889] 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 [ 38.902026] RSP: 002b:00007ffc956c6ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.902927] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72a8247d82 [ 38.903785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72a7681000 [ 38.904634] RBP: 00007f72a7681000 R08: 0000000000000009 R09: 0000000000001000 [ 38.905481] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d968b6d980 [ 38.906320] R13: 00007ffc956c6bc0 R14: 00007ffc956c6bf0 R15: 00007ffc956c6f50 [ 38.907175] [ 38.907474] [ 38.907693] Allocated by task 212: [ 38.908118] kasan_save_stack+0x22/0x50 [ 38.908620] kasan_set_track+0x25/0x30 [ 38.909116] __kasan_slab_alloc+0x59/0x70 [ 38.909636] kmem_cache_alloc+0x16b/0x370 [ 38.910158] vm_area_dup+0x20/0x160 [ 38.910619] __split_vma+0x170/0x950 [ 38.911083] split_vma+0xc6/0x110 [ 38.911540] mprotect_fixup+0x8d2/0xb30 [ 38.912044] do_mprotect_pkey+0x87e/0xd40 [ 38.912560] __x64_sys_mprotect+0x78/0xc0 [ 38.913077] do_syscall_64+0x3f/0x90 [ 38.913550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914189] [ 38.914410] Freed by task 212: [ 38.914803] kasan_save_stack+0x22/0x50 [ 38.915302] kasan_set_track+0x25/0x30 [ 38.915805] kasan_save_free_info+0x2b/0x50 [ 38.916335] __kasan_slab_free+0x10a/0x190 [ 38.916863] kmem_cache_free+0x10d/0x4d0 [ 38.917377] rcu_core+0x8c8/0x2860 [ 38.917830] __do_softirq+0x1b7/0x7d4 [ 38.918310] [ 38.918529] Last potentially related work creation: [ 38.919114] kasan_save_stack+0x22/0x50 [ 38.919635] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920207] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.920858] remove_vma+0x139/0x170 [ 38.921309] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.921862] do_vmi_munmap+0x1f1/0x2b0 [ 38.922344] __vm_munmap+0x138/0x3a0 [ 38.922814] __x64_sys_munmap+0x59/0x80 [ 38.923307] do_syscall_64+0x3f/0x90 [ 38.923808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924447] [ 38.924662] The buggy address belongs to the object at ffff888016c1a2b8 [ 38.924662] which belongs to the cache vm_area_struct of size 168 [ 38.926121] The buggy address is located 88 bytes inside of [ 38.926121] freed 168-byte region [ffff888016c1a2b8, ffff888016c1a360) [ 38.927541] [ 38.927757] The buggy address belongs to the physical page: [ 38.928408] page:000000002444ea21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c1a [ 38.929496] memcg:ffff888016c1b001 [ 38.929920] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.930565] page_type: 0xffffffff() [ 38.931014] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.931951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c1b001 [ 38.932862] page dumped because: kasan: bad access detected [ 38.933520] [ 38.933735] Memory state around the buggy address: [ 38.934311] ffff888016c1a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.935164] ffff888016c1a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.936029] >ffff888016c1a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.936877] ^ [ 38.937341] ffff888016c1a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.938203] ffff888016c1a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.939048] ================================================================== [ 38.940085] Disabling lock debugging due to kernel taint [ 40.992516] BUG: Bad rss-counter state mm:00000000c605008e type:MM_FILEPAGES val:33 [ 40.993751] BUG: Bad rss-counter state mm:00000000c605008e type:MM_ANONPAGES val:22 [ 41.462117] BUG: Bad rss-counter state mm:00000000b868930d type:MM_FILEPAGES val:33 [ 41.463340] BUG: Bad rss-counter state mm:00000000b868930d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18846' (ECDSA) to the list of known hosts. 2023/06/20 21:11:52 fuzzer started 2023/06/20 21:11:52 dialing manager at localhost:36067 2023/06/20 21:11:52 checking machine... 2023/06/20 21:11:52 checking revisions... [ 42.091297] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:11:52 testing simple program... [ 42.142402] cgroup: Unknown subsys name 'net' [ 42.205201] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:11:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11003497e7f RSP=ffff88801a4bf3d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=0000000000000014 RIP=ffffffff8135b960 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 00007f3449590900 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=00007f3449b47618 CR3=000000000dcbe000 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=563412feff00545000000000000080fe 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=00007faa71ec3880 CR3=0000000013630000 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=11ca5e1018320cab7d4457f78ef450b6 XMM02=000000000011a8c0ec2efd57dc4c00df XMM03=00000000001212803b8893fe549db387 XMM04=a01b54834877156b00000000000ae988 XMM05=d6a1b096bd7b543800000000001314f8 XMM06=806171799158d9670000000000130c68 XMM07=e042d86d42eb936e0000000000121500 XMM08=3b8893fe549db387000000000011a920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000