syzkaller login: [ 74.540154] BUG: Bad rss-counter state mm:00000000865bcb69 type:MM_FILEPAGES val:33 [ 74.541502] BUG: Bad rss-counter state mm:00000000865bcb69 type:MM_ANONPAGES val:22 [ 74.716148] ================================================================== [ 74.717042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 74.717983] Read of size 8 at addr ffff888019fd0ed8 by task sshd/229 [ 74.718843] [ 74.719060] CPU: 0 PID: 229 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 74.720080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 74.721201] Call Trace: [ 74.721583] <TASK> [ 74.721915] dump_stack_lvl+0x91/0xf0 [ 74.722486] print_report+0xcc/0x620 [ 74.723052] ? __virt_addr_valid+0x102/0x340 [ 74.723714] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.724438] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.725165] kasan_report+0xbe/0xf0 [ 74.725732] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.726483] vma_interval_tree_remove+0xc75/0xec0 [ 74.727213] vma_prepare+0xc54/0x11a0 [ 74.727801] __split_vma+0x5af/0x950 [ 74.728372] ? __pfx___split_vma+0x10/0x10 [ 74.729007] ? find_held_lock+0x2c/0x110 [ 74.729636] do_vmi_align_munmap+0x2ba/0x11f0 [ 74.730323] ? lock_is_held_type+0x9f/0x120 [ 74.730971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 74.731732] ? mtree_range_walk+0x632/0x900 [ 74.732402] ? mas_walk+0x5c7/0x7c0 [ 74.732895] do_vmi_munmap+0x1f1/0x2b0 [ 74.733380] mmap_region+0x1f9/0x2660 [ 74.733856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 74.734365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 74.735067] ? __pfx_lock_acquire+0x10/0x10 [ 74.735603] ? __pfx_mmap_region+0x10/0x10 [ 74.736123] ? security_mmap_addr+0x7d/0xa0 [ 74.736649] ? get_unmapped_area+0x1f5/0x3f0 [ 74.737198] do_mmap+0x854/0xf00 [ 74.737633] vm_mmap_pgoff+0x1a6/0x3a0 [ 74.738126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 74.738679] ksys_mmap_pgoff+0x3af/0x500 [ 74.739179] do_syscall_64+0x3f/0x90 [ 74.739669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.740306] RIP: 0033:0x7f4fd091cd82 [ 74.740761] 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 [ 74.742875] RSP: 002b:00007fff3871ba38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 74.743791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fd091cd82 [ 74.744638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fcfd56000 [ 74.745485] RBP: 00007f4fcfd56000 R08: 0000000000000009 R09: 0000000000001000 [ 74.746321] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cad649dd90 [ 74.747165] R13: 00007fff3871ba50 R14: 00007fff3871ba80 R15: 00007fff3871bde0 [ 74.748021] </TASK> [ 74.748311] [ 74.748528] Allocated by task 222: [ 74.748959] kasan_save_stack+0x22/0x50 [ 74.749453] kasan_set_track+0x25/0x30 [ 74.749944] __kasan_slab_alloc+0x59/0x70 [ 74.750462] kmem_cache_alloc+0x16b/0x370 [ 74.750974] vm_area_dup+0x20/0x160 [ 74.751430] __split_vma+0x170/0x950 [ 74.751895] split_vma+0xc6/0x110 [ 74.752331] mprotect_fixup+0x8d2/0xb30 [ 74.752827] do_mprotect_pkey+0x87e/0xd40 [ 74.753342] __x64_sys_mprotect+0x78/0xc0 [ 74.753852] do_syscall_64+0x3f/0x90 [ 74.754319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.754949] [ 74.755162] Freed by task 203: [ 74.755562] kasan_save_stack+0x22/0x50 [ 74.756059] kasan_set_track+0x25/0x30 [ 74.756550] kasan_save_free_info+0x2b/0x50 [ 74.757079] __kasan_slab_free+0x10a/0x190 [ 74.757610] kmem_cache_free+0x10d/0x4d0 [ 74.758109] rcu_core+0x8c8/0x2860 [ 74.758554] __do_softirq+0x1b7/0x7d4 [ 74.759033] [ 74.759246] Last potentially related work creation: [ 74.759831] kasan_save_stack+0x22/0x50 [ 74.760337] __kasan_record_aux_stack+0x8e/0xa0 [ 74.760902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 74.761532] remove_vma+0x139/0x170 [ 74.761985] do_vmi_align_munmap+0xd4a/0x11f0 [ 74.762538] do_vmi_munmap+0x1f1/0x2b0 [ 74.763020] __vm_munmap+0x138/0x3a0 [ 74.763491] __x64_sys_munmap+0x59/0x80 [ 74.763986] do_syscall_64+0x3f/0x90 [ 74.764459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.765097] [ 74.765310] The buggy address belongs to the object at ffff888019fd0e80 [ 74.765310] which belongs to the cache vm_area_struct of size 168 [ 74.766763] The buggy address is located 88 bytes inside of [ 74.766763] freed 168-byte region [ffff888019fd0e80, ffff888019fd0f28) [ 74.768173] [ 74.768390] The buggy address belongs to the physical page: [ 74.769048] page:00000000bfff998a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fd0 [ 74.770137] memcg:ffff88800e446301 [ 74.770562] flags: 0x100000000000200(slab|node=0|zone=1) [ 74.771200] page_type: 0xffffffff() [ 74.771658] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 74.772568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e446301 [ 74.773466] page dumped because: kasan: bad access detected [ 74.774135] [ 74.774347] Memory state around the buggy address: [ 74.774921] ffff888019fd0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 74.775788] ffff888019fd0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 74.776640] >ffff888019fd0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.777481] ^ [ 74.778197] ffff888019fd0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 74.779044] ffff888019fd0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 74.779904] ================================================================== [ 74.780954] Disabling lock debugging due to kernel taint [ 77.378349] BUG: Bad rss-counter state mm:0000000069f14710 type:MM_FILEPAGES val:33 [ 77.379876] BUG: Bad rss-counter state mm:0000000069f14710 type:MM_ANONPAGES val:22 [ 77.954466] BUG: Bad rss-counter state mm:00000000fa7ea6d4 type:MM_FILEPAGES val:33 [ 77.955636] BUG: Bad rss-counter state mm:00000000fa7ea6d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36030' (ECDSA) to the list of known hosts. 2023/06/20 02:37:07 fuzzer started 2023/06/20 02:37:07 dialing manager at localhost:44161 2023/06/20 02:37:07 checking machine... 2023/06/20 02:37:07 checking revisions... [ 78.589563] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:37:07 testing simple program... [ 78.637522] cgroup: Unknown subsys name 'net' [ 78.679196] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc5fa1e23d0 CR3=000000000c80c000 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=2036303a37333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3933 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3933325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a37333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008edb680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab3fa9 RDI=ffff888008edba74 RBP=ffff888008edb680 RSP=ffff88801ca074f0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000b5 R11=00001aba00001aba R12=0000000000000000 R13=00000000000000b5 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8135bd9a RFL=00000217 [----APC] 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 00007f668463c900 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=00007ffe839d5000 CR3=000000001ca24000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000