syzkaller login: [ 33.613826] BUG: Bad rss-counter state mm:00000000a099df5c type:MM_FILEPAGES val:33 [ 33.615220] BUG: Bad rss-counter state mm:00000000a099df5c type:MM_ANONPAGES val:22 [ 33.758053] ================================================================== [ 33.759138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.760258] Read of size 8 at addr ffff888018ce7d08 by task sshd/219 [ 33.761326] [ 33.761592] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.762632] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.763808] Call Trace: [ 33.764195] [ 33.764539] dump_stack_lvl+0x91/0xf0 [ 33.765127] print_report+0xcc/0x620 [ 33.765695] ? __virt_addr_valid+0x102/0x340 [ 33.766358] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.767083] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.767822] kasan_report+0xbe/0xf0 [ 33.768381] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.769119] vma_interval_tree_remove+0xc75/0xec0 [ 33.769831] vma_prepare+0xc54/0x11a0 [ 33.770406] __split_vma+0x5af/0x950 [ 33.770973] ? __pfx___split_vma+0x10/0x10 [ 33.771592] ? find_held_lock+0x2c/0x110 [ 33.772118] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.772691] ? lock_is_held_type+0x9f/0x120 [ 33.773231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.773841] ? mtree_range_walk+0x632/0x900 [ 33.774389] ? mas_walk+0x5c7/0x7c0 [ 33.774866] do_vmi_munmap+0x1f1/0x2b0 [ 33.775374] mmap_region+0x1f9/0x2660 [ 33.775862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.776378] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.777102] ? __pfx_lock_acquire+0x10/0x10 [ 33.777636] ? __pfx_mmap_region+0x10/0x10 [ 33.778167] ? security_mmap_addr+0x7d/0xa0 [ 33.778699] ? get_unmapped_area+0x1f5/0x3f0 [ 33.779250] do_mmap+0x854/0xf00 [ 33.779686] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.780184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.780747] ksys_mmap_pgoff+0x3af/0x500 [ 33.781252] do_syscall_64+0x3f/0x90 [ 33.781726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.782369] RIP: 0033:0x7fc56afa0d82 [ 33.782834] 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 [ 33.784987] RSP: 002b:00007ffc525c8cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.785896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc56afa0d82 [ 33.786749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc56a3da000 [ 33.787598] RBP: 00007fc56a3da000 R08: 0000000000000009 R09: 0000000000001000 [ 33.788448] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598c6990b20 [ 33.789299] R13: 00007ffc525c8cd0 R14: 00007ffc525c8d00 R15: 00007ffc525c9060 [ 33.790157] [ 33.790450] [ 33.790665] Allocated by task 212: [ 33.791095] kasan_save_stack+0x22/0x50 [ 33.791629] kasan_set_track+0x25/0x30 [ 33.792127] __kasan_slab_alloc+0x59/0x70 [ 33.792653] kmem_cache_alloc+0x16b/0x370 [ 33.793174] vm_area_dup+0x20/0x160 [ 33.793632] __split_vma+0x170/0x950 [ 33.794100] split_vma+0xc6/0x110 [ 33.794544] mprotect_fixup+0x8d2/0xb30 [ 33.795048] do_mprotect_pkey+0x87e/0xd40 [ 33.795586] __x64_sys_mprotect+0x78/0xc0 [ 33.796107] do_syscall_64+0x3f/0x90 [ 33.796580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.797227] [ 33.797446] Freed by task 212: [ 33.797841] kasan_save_stack+0x22/0x50 [ 33.798341] kasan_set_track+0x25/0x30 [ 33.798841] kasan_save_free_info+0x2b/0x50 [ 33.799381] __kasan_slab_free+0x10a/0x190 [ 33.799915] kmem_cache_free+0x10d/0x4d0 [ 33.800426] rcu_core+0x8c8/0x2860 [ 33.800871] __do_softirq+0x1b7/0x7d4 [ 33.801448] [ 33.801666] Last potentially related work creation: [ 33.802246] kasan_save_stack+0x22/0x50 [ 33.802753] __kasan_record_aux_stack+0x8e/0xa0 [ 33.803334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.803978] remove_vma+0x139/0x170 [ 33.804431] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.804998] do_vmi_munmap+0x1f1/0x2b0 [ 33.805487] __vm_munmap+0x138/0x3a0 [ 33.805956] __x64_sys_munmap+0x59/0x80 [ 33.806450] do_syscall_64+0x3f/0x90 [ 33.806922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.807579] [ 33.807795] The buggy address belongs to the object at ffff888018ce7cb0 [ 33.807795] which belongs to the cache vm_area_struct of size 168 [ 33.809253] The buggy address is located 88 bytes inside of [ 33.809253] freed 168-byte region [ffff888018ce7cb0, ffff888018ce7d58) [ 33.810667] [ 33.810883] The buggy address belongs to the physical page: [ 33.811559] page:00000000389e2b42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ce7 [ 33.812655] memcg:ffff88800edf3301 [ 33.813086] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.813730] page_type: 0xffffffff() [ 33.814178] raw: 0100000000000200 ffff88800879fc80 ffffea00003bbd80 0000000000000002 [ 33.815108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf3301 [ 33.816030] page dumped because: kasan: bad access detected [ 33.816706] [ 33.816921] Memory state around the buggy address: [ 33.817503] ffff888018ce7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.818361] ffff888018ce7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.819229] >ffff888018ce7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.820086] ^ [ 33.820521] ffff888018ce7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.821377] ffff888018ce7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.822233] ================================================================== [ 33.823195] Disabling lock debugging due to kernel taint [ 35.849256] BUG: Bad rss-counter state mm:00000000e2aa7b70 type:MM_FILEPAGES val:33 [ 35.850307] BUG: Bad rss-counter state mm:00000000e2aa7b70 type:MM_ANONPAGES val:22 [ 36.406949] BUG: Bad rss-counter state mm:00000000e2c60b67 type:MM_FILEPAGES val:33 [ 36.408937] BUG: Bad rss-counter state mm:00000000e2c60b67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35039' (ECDSA) to the list of known hosts. 2023/06/19 12:39:08 fuzzer started 2023/06/19 12:39:09 dialing manager at localhost:44161 2023/06/19 12:39:09 checking machine... 2023/06/19 12:39:09 checking revisions... [ 37.057609] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:39:09 testing simple program... [ 37.106352] cgroup: Unknown subsys name 'net' [ 37.166416] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:39:05 Registers: info registers vcpu 0 RAX=fffff940000dd038 RBX=fffff940000dd039 RCX=ffffffff81621448 RDX=fffff940000dd039 RSI=0000000000000008 RDI=ffffea00006e81c0 RBP=fffff940000dd038 RSP=ffff888018ef7bc8 R8 =0000000000000001 R9 =fffff940000dd038 R10=ffffea00006e81c7 R11=0000000000000000 R12=ffffea00006e81c0 R13=ffff888014704ae0 R14=ffff888018ef7db8 R15=ffffea00006e81f4 RIP=ffffffff8180f009 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd78d997900 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=00007fd78df4f0b0 CR3=000000000f290000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007fff8c11bd68 CR3=0000000014522000 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=2038303a39333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000