syzkaller login: [ 28.830696] BUG: Bad rss-counter state mm:000000000e93d999 type:MM_FILEPAGES val:33 [ 28.831957] BUG: Bad rss-counter state mm:000000000e93d999 type:MM_ANONPAGES val:22 [ 28.905808] ================================================================== [ 28.906899] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.907985] Read of size 8 at addr ffff88800e595df0 by task sshd/220 [ 28.909101] [ 28.909354] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.910356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.911502] Call Trace: [ 28.911872] [ 28.912145] dump_stack_lvl+0x91/0xf0 [ 28.912609] print_report+0xcc/0x620 [ 28.913064] ? __virt_addr_valid+0x102/0x340 [ 28.913583] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.914164] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.914754] kasan_report+0xbe/0xf0 [ 28.915203] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.915785] vma_interval_tree_remove+0xc75/0xec0 [ 28.916349] vma_prepare+0xc54/0x11a0 [ 28.916799] __split_vma+0x5af/0x950 [ 28.917246] ? __pfx___split_vma+0x10/0x10 [ 28.917751] ? find_held_lock+0x2c/0x110 [ 28.918249] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.918810] ? lock_is_held_type+0x9f/0x120 [ 28.919416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.920121] ? mtree_range_walk+0x632/0x900 [ 28.920764] ? mas_walk+0x5c7/0x7c0 [ 28.921314] do_vmi_munmap+0x1f1/0x2b0 [ 28.921886] mmap_region+0x1f9/0x2660 [ 28.922454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.923048] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.923876] ? __pfx_lock_acquire+0x10/0x10 [ 28.924488] ? __pfx_mmap_region+0x10/0x10 [ 28.925103] ? security_mmap_addr+0x7d/0xa0 [ 28.925714] ? get_unmapped_area+0x1f5/0x3f0 [ 28.926347] do_mmap+0x854/0xf00 [ 28.926864] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.927438] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.928088] ksys_mmap_pgoff+0x3af/0x500 [ 28.928674] do_syscall_64+0x3f/0x90 [ 28.929233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929983] RIP: 0033:0x7f410654ed82 [ 28.930530] 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 [ 28.933001] RSP: 002b:00007fff407af1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.934054] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f410654ed82 [ 28.935048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4105988000 [ 28.936035] RBP: 00007f4105988000 R08: 0000000000000009 R09: 0000000000001000 [ 28.937015] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab8150fec0 [ 28.937997] R13: 00007fff407af1c0 R14: 00007fff407af1f0 R15: 00007fff407af550 [ 28.939001] [ 28.939337] [ 28.939585] Allocated by task 213: [ 28.940080] kasan_save_stack+0x22/0x50 [ 28.940663] kasan_set_track+0x25/0x30 [ 28.941233] __kasan_slab_alloc+0x59/0x70 [ 28.941838] kmem_cache_alloc+0x16b/0x370 [ 28.942447] vm_area_dup+0x20/0x160 [ 28.942979] __split_vma+0x170/0x950 [ 28.943509] split_vma+0xc6/0x110 [ 28.944014] mprotect_fixup+0x8d2/0xb30 [ 28.944591] do_mprotect_pkey+0x87e/0xd40 [ 28.945193] __x64_sys_mprotect+0x78/0xc0 [ 28.945795] do_syscall_64+0x3f/0x90 [ 28.946346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947106] [ 28.947354] Freed by task 213: [ 28.947814] kasan_save_stack+0x22/0x50 [ 28.948392] kasan_set_track+0x25/0x30 [ 28.948963] kasan_save_free_info+0x2b/0x50 [ 28.949583] __kasan_slab_free+0x10a/0x190 [ 28.950203] kmem_cache_free+0x10d/0x4d0 [ 28.950800] rcu_core+0x8c8/0x2860 [ 28.951404] __do_softirq+0x1b7/0x7d4 [ 28.951964] [ 28.952214] Last potentially related work creation: [ 28.952889] kasan_save_stack+0x22/0x50 [ 28.953475] __kasan_record_aux_stack+0x8e/0xa0 [ 28.954138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.954899] remove_vma+0x139/0x170 [ 28.955426] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.956074] do_vmi_munmap+0x1f1/0x2b0 [ 28.956637] __vm_munmap+0x138/0x3a0 [ 28.957182] __x64_sys_munmap+0x59/0x80 [ 28.957758] do_syscall_64+0x3f/0x90 [ 28.958311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.959068] [ 28.959315] The buggy address belongs to the object at ffff88800e595d98 [ 28.959315] which belongs to the cache vm_area_struct of size 168 [ 28.961026] The buggy address is located 88 bytes inside of [ 28.961026] freed 168-byte region [ffff88800e595d98, ffff88800e595e40) [ 28.962683] [ 28.962933] The buggy address belongs to the physical page: [ 28.963701] page:000000006b8e12b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe595 [ 28.964958] memcg:ffff88800ed2f701 [ 28.965449] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.966199] page_type: 0xffffffff() [ 28.966754] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.967825] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed2f701 [ 28.968872] page dumped because: kasan: bad access detected [ 28.969646] [ 28.969894] Memory state around the buggy address: [ 28.970576] ffff88800e595c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.971570] ffff88800e595d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.972560] >ffff88800e595d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.973547] ^ [ 28.974501] ffff88800e595e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.975488] ffff88800e595e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.976478] ================================================================== [ 28.977581] Disabling lock debugging due to kernel taint [ 31.513588] BUG: Bad rss-counter state mm:000000001d4fe109 type:MM_FILEPAGES val:33 [ 31.514843] BUG: Bad rss-counter state mm:000000001d4fe109 type:MM_ANONPAGES val:22 [ 31.906648] BUG: Bad rss-counter state mm:000000003822a6c9 type:MM_FILEPAGES val:33 [ 31.907982] BUG: Bad rss-counter state mm:000000003822a6c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28047' (ECDSA) to the list of known hosts. 2023/06/20 20:36:58 fuzzer started 2023/06/20 20:36:58 dialing manager at localhost:36067 2023/06/20 20:36:58 checking machine... 2023/06/20 20:36:58 checking revisions... [ 32.602529] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:36:59 testing simple program... [ 32.651788] cgroup: Unknown subsys name 'net' [ 32.691029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:36:58 Registers: info registers vcpu 0 RAX=1ffffffff0bf5042 RBX=ffffffff85fa8210 RCX=ffffffff8366b8de RDX=0000000000000000 RSI=ffffffff863b8156 RDI=ffffffff85fa81f8 RBP=ffffffff85fa820c RSP=ffff888017daf4f0 R8 =ffffffff863b8156 R9 =ffff888017daf5e8 R10=0000000000038001 R11=000000000008b60d R12=ffffffff85fa8218 R13=ffffffff85fa81f8 R14=ffffffff85fa8208 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007febfba40900 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=00007febfbff7618 CR3=000000000e122000 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=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=00007ff7338c1d40 CR3=000000000e0e0000 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=2cec9f3948f6c494eb403228d75c69ea XMM02=0000000000119dc0eff9b2d0a8fce9cb XMM03=0000000000119e902c67c8bc2e329bc3 XMM04=101178e3e060759f00000000000ae988 XMM05=e4cb8bb95a7664b600000000001314e8 XMM06=c291bd5c70af25b90000000000131370 XMM07=e042d86d42eb936e00000000001211d0 XMM08=3d5da9c8cbeb84de0000000000119e90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000