syzkaller login: [ 34.295925] BUG: Bad rss-counter state mm:00000000e412a46b type:MM_FILEPAGES val:33 [ 34.297134] BUG: Bad rss-counter state mm:00000000e412a46b type:MM_ANONPAGES val:22 [ 34.334192] ================================================================== [ 34.335191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.336169] Read of size 8 at addr ffff88800f00d140 by task sshd/220 [ 34.336951] [ 34.337253] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.338135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.339137] Call Trace: [ 34.339465] [ 34.339765] dump_stack_lvl+0x91/0xf0 [ 34.340272] print_report+0xcc/0x620 [ 34.340758] ? __virt_addr_valid+0x102/0x340 [ 34.341313] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.341945] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.342571] kasan_report+0xbe/0xf0 [ 34.343045] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.343677] vma_interval_tree_remove+0xc75/0xec0 [ 34.344292] vma_prepare+0xc54/0x11a0 [ 34.344784] __split_vma+0x5af/0x950 [ 34.345255] ? __pfx___split_vma+0x10/0x10 [ 34.345793] ? find_held_lock+0x2c/0x110 [ 34.346323] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.346896] ? lock_is_held_type+0x9f/0x120 [ 34.347438] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.348074] ? mtree_range_walk+0x632/0x900 [ 34.348631] ? mas_walk+0x5c7/0x7c0 [ 34.349108] do_vmi_munmap+0x1f1/0x2b0 [ 34.349602] mmap_region+0x1f9/0x2660 [ 34.350090] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.350604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.351328] ? __pfx_lock_acquire+0x10/0x10 [ 34.351869] ? __pfx_mmap_region+0x10/0x10 [ 34.352400] ? security_mmap_addr+0x7d/0xa0 [ 34.352937] ? get_unmapped_area+0x1f5/0x3f0 [ 34.353490] do_mmap+0x854/0xf00 [ 34.353937] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.354441] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.355006] ksys_mmap_pgoff+0x3af/0x500 [ 34.355528] do_syscall_64+0x3f/0x90 [ 34.356029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.356688] RIP: 0033:0x7f2dcd68dd82 [ 34.357147] 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 [ 34.359291] RSP: 002b:00007ffe965722e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.360227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2dcd68dd82 [ 34.361108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2dccac7000 [ 34.361960] RBP: 00007f2dccac7000 R08: 0000000000000009 R09: 0000000000001000 [ 34.362823] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b65ee02ec0 [ 34.363695] R13: 00007ffe96572300 R14: 00007ffe96572330 R15: 00007ffe96572690 [ 34.364571] [ 34.364867] [ 34.365084] Allocated by task 213: [ 34.365533] kasan_save_stack+0x22/0x50 [ 34.366053] kasan_set_track+0x25/0x30 [ 34.366549] __kasan_slab_alloc+0x59/0x70 [ 34.367086] kmem_cache_alloc+0x16b/0x370 [ 34.367620] vm_area_dup+0x20/0x160 [ 34.368085] __split_vma+0x170/0x950 [ 34.368565] split_vma+0xc6/0x110 [ 34.369017] mprotect_fixup+0x8d2/0xb30 [ 34.369522] do_mprotect_pkey+0x87e/0xd40 [ 34.370053] __x64_sys_mprotect+0x78/0xc0 [ 34.370580] do_syscall_64+0x3f/0x90 [ 34.371064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.371728] [ 34.371945] Freed by task 203: [ 34.372344] kasan_save_stack+0x22/0x50 [ 34.372858] kasan_set_track+0x25/0x30 [ 34.373359] kasan_save_free_info+0x2b/0x50 [ 34.373897] __kasan_slab_free+0x10a/0x190 [ 34.374442] kmem_cache_free+0x10d/0x4d0 [ 34.374956] rcu_core+0x8c8/0x2860 [ 34.375401] __do_softirq+0x1b7/0x7d4 [ 34.375899] [ 34.376115] Last potentially related work creation: [ 34.376711] kasan_save_stack+0x22/0x50 [ 34.377223] __kasan_record_aux_stack+0x8e/0xa0 [ 34.377812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.378463] remove_vma+0x139/0x170 [ 34.378924] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.379504] do_vmi_munmap+0x1f1/0x2b0 [ 34.380005] __vm_munmap+0x138/0x3a0 [ 34.380497] __x64_sys_munmap+0x59/0x80 [ 34.381002] do_syscall_64+0x3f/0x90 [ 34.381493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.382152] [ 34.382370] Second to last potentially related work creation: [ 34.383066] kasan_save_stack+0x22/0x50 [ 34.383574] __kasan_record_aux_stack+0x8e/0xa0 [ 34.384162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.384845] remove_vma+0x139/0x170 [ 34.385300] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.385874] do_vmi_munmap+0x1f1/0x2b0 [ 34.386363] mmap_region+0x1f9/0x2660 [ 34.386847] do_mmap+0x854/0xf00 [ 34.387283] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.387800] ksys_mmap_pgoff+0x3af/0x500 [ 34.388327] do_syscall_64+0x3f/0x90 [ 34.388809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.389463] [ 34.389686] The buggy address belongs to the object at ffff88800f00d0e8 [ 34.389686] which belongs to the cache vm_area_struct of size 168 [ 34.391200] The buggy address is located 88 bytes inside of [ 34.391200] freed 168-byte region [ffff88800f00d0e8, ffff88800f00d190) [ 34.392615] [ 34.392834] The buggy address belongs to the physical page: [ 34.393494] page:0000000000051a3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf00d [ 34.394608] memcg:ffff88800c5c2801 [ 34.395043] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.395711] page_type: 0xffffffff() [ 34.396178] raw: 0100000000000200 ffff88800879fc80 ffffea000025cc00 dead00000000000c [ 34.397105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5c2801 [ 34.398025] page dumped because: kasan: bad access detected [ 34.398703] [ 34.398919] Memory state around the buggy address: [ 34.399502] ffff88800f00d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.400381] ffff88800f00d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 34.401250] >ffff88800f00d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.402113] ^ [ 34.402764] ffff88800f00d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.403639] ffff88800f00d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.404499] ================================================================== [ 34.405800] Disabling lock debugging due to kernel taint [ 36.175492] BUG: Bad rss-counter state mm:00000000e754d0aa type:MM_FILEPAGES val:33 [ 36.176699] BUG: Bad rss-counter state mm:00000000e754d0aa type:MM_ANONPAGES val:22 [ 36.565063] BUG: Bad rss-counter state mm:000000005f6d9cb2 type:MM_FILEPAGES val:33 [ 36.566264] BUG: Bad rss-counter state mm:000000005f6d9cb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16212' (ECDSA) to the list of known hosts. 2023/06/20 10:39:40 fuzzer started 2023/06/20 10:39:40 dialing manager at localhost:44161 2023/06/20 10:39:40 checking machine... 2023/06/20 10:39:40 checking revisions... [ 37.312209] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:39:40 testing simple program... [ 37.366074] cgroup: Unknown subsys name 'net' [ 37.402587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:39:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff88801a297a98 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000283 R13=ffffffff856d8340 R14=ffffffff8366dfdf R15=0000000000000000 RIP=ffffffff81534263 RFL=00000047 [---Z-PC] 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 00007f3890455900 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=00007fff71e7e000 CR3=000000001694e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fad9c953110 CR3=0000000019e3e000 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=2030343a39333a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a39333a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000