syzkaller login: [ 36.525961] BUG: Bad rss-counter state mm:000000001ae41236 type:MM_FILEPAGES val:33 [ 36.526565] BUG: Bad rss-counter state mm:000000001ae41236 type:MM_ANONPAGES val:22 [ 36.689365] ================================================================== [ 36.690331] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.691319] Read of size 8 at addr ffff888018399310 by task sshd/219 [ 36.692132] [ 36.692403] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.693427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.694466] Call Trace: [ 36.694822] [ 36.695117] dump_stack_lvl+0x91/0xf0 [ 36.695635] print_report+0xcc/0x620 [ 36.696148] ? __virt_addr_valid+0x102/0x340 [ 36.696738] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.697396] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.698030] kasan_report+0xbe/0xf0 [ 36.698566] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.699209] vma_interval_tree_remove+0xc75/0xec0 [ 36.699854] vma_prepare+0xc54/0x11a0 [ 36.700367] __split_vma+0x5af/0x950 [ 36.700851] ? __pfx___split_vma+0x10/0x10 [ 36.701432] ? find_held_lock+0x2c/0x110 [ 36.701970] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.702600] ? lock_is_held_type+0x9f/0x120 [ 36.703167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.703818] ? mtree_range_walk+0x632/0x900 [ 36.704415] ? mas_walk+0x5c7/0x7c0 [ 36.704912] do_vmi_munmap+0x1f1/0x2b0 [ 36.705444] mmap_region+0x1f9/0x2660 [ 36.705948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.706513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.707310] ? __pfx_lock_acquire+0x10/0x10 [ 36.707876] ? __pfx_mmap_region+0x10/0x10 [ 36.708451] ? security_mmap_addr+0x7d/0xa0 [ 36.709013] ? get_unmapped_area+0x1f5/0x3f0 [ 36.709604] do_mmap+0x854/0xf00 [ 36.710072] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.710630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.711217] ksys_mmap_pgoff+0x3af/0x500 [ 36.711760] do_syscall_64+0x3f/0x90 [ 36.712256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.712946] RIP: 0033:0x7f22fb997d82 [ 36.713437] 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 [ 36.715695] RSP: 002b:00007ffe99567088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.716655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22fb997d82 [ 36.717564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22fadd1000 [ 36.718471] RBP: 00007f22fadd1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.719387] R10: 0000000000000812 R11: 0000000000000206 R12: 000055573f73db20 [ 36.720310] R13: 00007ffe995670a0 R14: 00007ffe995670d0 R15: 00007ffe99567430 [ 36.721209] [ 36.721531] [ 36.721753] Allocated by task 212: [ 36.722198] kasan_save_stack+0x22/0x50 [ 36.722767] kasan_set_track+0x25/0x30 [ 36.723297] __kasan_slab_alloc+0x59/0x70 [ 36.723866] kmem_cache_alloc+0x16b/0x370 [ 36.724426] vm_area_dup+0x20/0x160 [ 36.724898] __split_vma+0x170/0x950 [ 36.725399] split_vma+0xc6/0x110 [ 36.725851] mprotect_fixup+0x8d2/0xb30 [ 36.726399] do_mprotect_pkey+0x87e/0xd40 [ 36.726965] __x64_sys_mprotect+0x78/0xc0 [ 36.727519] do_syscall_64+0x3f/0x90 [ 36.728021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.728705] [ 36.728926] Freed by task 212: [ 36.729353] kasan_save_stack+0x22/0x50 [ 36.729883] kasan_set_track+0x25/0x30 [ 36.730427] kasan_save_free_info+0x2b/0x50 [ 36.730973] __kasan_slab_free+0x10a/0x190 [ 36.731516] kmem_cache_free+0x10d/0x4d0 [ 36.732029] rcu_core+0x8c8/0x2860 [ 36.732490] __do_softirq+0x1b7/0x7d4 [ 36.732970] [ 36.733182] Last potentially related work creation: [ 36.733784] kasan_save_stack+0x22/0x50 [ 36.734320] __kasan_record_aux_stack+0x8e/0xa0 [ 36.734970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.735803] remove_vma+0x139/0x170 [ 36.736399] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.736979] do_vmi_munmap+0x1f1/0x2b0 [ 36.737493] __vm_munmap+0x138/0x3a0 [ 36.737986] __x64_sys_munmap+0x59/0x80 [ 36.738538] do_syscall_64+0x3f/0x90 [ 36.739035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.739716] [ 36.739939] The buggy address belongs to the object at ffff8880183992b8 [ 36.739939] which belongs to the cache vm_area_struct of size 168 [ 36.741499] The buggy address is located 88 bytes inside of [ 36.741499] freed 168-byte region [ffff8880183992b8, ffff888018399360) [ 36.743023] [ 36.743251] The buggy address belongs to the physical page: [ 36.743959] page:0000000080cce085 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18399 [ 36.745118] memcg:ffff888019ef7a01 [ 36.745576] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.746217] page_type: 0xffffffff() [ 36.746699] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.747628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ef7a01 [ 36.748578] page dumped because: kasan: bad access detected [ 36.749255] [ 36.749488] Memory state around the buggy address: [ 36.750103] ffff888018399200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.751044] ffff888018399280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.751946] >ffff888018399300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.752847] ^ [ 36.753364] ffff888018399380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.754262] ffff888018399400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.755156] ================================================================== [ 36.756188] Disabling lock debugging due to kernel taint [ 38.629086] BUG: Bad rss-counter state mm:00000000dcbbeffc type:MM_FILEPAGES val:33 [ 38.630330] BUG: Bad rss-counter state mm:00000000dcbbeffc type:MM_ANONPAGES val:22 [ 39.087668] BUG: Bad rss-counter state mm:000000000b9d7303 type:MM_FILEPAGES val:33 [ 39.088837] BUG: Bad rss-counter state mm:000000000b9d7303 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59736' (ECDSA) to the list of known hosts. 2023/06/19 14:22:50 fuzzer started 2023/06/19 14:22:50 dialing manager at localhost:44161 2023/06/19 14:22:50 checking machine... 2023/06/19 14:22:50 checking revisions... [ 39.735803] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:22:50 testing simple program... [ 39.791908] cgroup: Unknown subsys name 'net' [ 39.841924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81935d99 RDX=dffffc0000000000 RSI=ffffffff81935d9a RDI=ffff88800d92f4a8 RBP=ffff88800d92f500 RSP=ffff88800d92f438 R8 =0000000000000001 R9 =ffff88800d92f4e8 R10=0000000000038001 R11=000000000002c9ea R12=ffff88800d92f508 R13=ffff88800d92f4f0 R14=ffff88800d92f4e9 R15=ffff88800d92f4a8 RIP=ffffffff81130719 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbb4bb80900 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=00007fbb4afaeb40 CR3=000000000c98a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=830e330c63ea2d5100000000000ae988 XMM05=588822286a3eb1770000000000134e08 XMM06=806171799158d9670000000000133bf8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e138b RSI=ffffffff818e03a4 RDI=ffff88806cf09b6c RBP=ffff88806cf09c58 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000024543 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015e59b40 R15=ffff88800cf3cd90 RIP=ffffffff813ad4f7 RFL=00000246 [---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 00007f1a5098b700 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=00007f1f6b6bb618 CR3=000000000bbec000 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=2039343a32323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a32323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000