syzkaller login: [ 31.635054] BUG: Bad rss-counter state mm:000000007ff69857 type:MM_FILEPAGES val:33 [ 31.636257] BUG: Bad rss-counter state mm:000000007ff69857 type:MM_ANONPAGES val:22 [ 31.674293] ================================================================== [ 31.675260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.676240] Read of size 8 at addr ffff8880166c64e0 by task sshd/221 [ 31.677050] [ 31.677276] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.678171] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.679214] Call Trace: [ 31.679545] <TASK> [ 31.679841] dump_stack_lvl+0x91/0xf0 [ 31.680353] print_report+0xcc/0x620 [ 31.680859] ? __virt_addr_valid+0x102/0x340 [ 31.681442] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682751] kasan_report+0xbe/0xf0 [ 31.683255] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.683873] vma_interval_tree_remove+0xc75/0xec0 [ 31.684473] vma_prepare+0xc54/0x11a0 [ 31.684947] __split_vma+0x5af/0x950 [ 31.685426] ? __pfx___split_vma+0x10/0x10 [ 31.685950] ? find_held_lock+0x2c/0x110 [ 31.686479] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.687050] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 31.687687] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 31.688349] ? lock_is_held_type+0x9f/0x120 [ 31.688888] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.689489] ? mtree_range_walk+0x632/0x900 [ 31.690039] ? mas_walk+0x5c7/0x7c0 [ 31.690517] do_vmi_munmap+0x1f1/0x2b0 [ 31.691020] mmap_region+0x1f9/0x2660 [ 31.691502] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.692015] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.692724] ? __pfx_lock_acquire+0x10/0x10 [ 31.693260] ? __pfx_mmap_region+0x10/0x10 [ 31.693785] ? security_mmap_addr+0x7d/0xa0 [ 31.694317] ? get_unmapped_area+0x1f5/0x3f0 [ 31.694881] do_mmap+0x854/0xf00 [ 31.695318] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.695808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.696369] ksys_mmap_pgoff+0x3af/0x500 [ 31.696871] do_syscall_64+0x3f/0x90 [ 31.697352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.698005] RIP: 0033:0x7f669bd57d82 [ 31.698465] 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 [ 31.700622] RSP: 002b:00007ffcc3308968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.701530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f669bd57d82 [ 31.702390] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f669b191000 [ 31.703258] RBP: 00007f669b191000 R08: 0000000000000009 R09: 0000000000001000 [ 31.704106] R10: 0000000000000812 R11: 0000000000000206 R12: 000055734ea03d90 [ 31.704957] R13: 00007ffcc3308980 R14: 00007ffcc33089b0 R15: 00007ffcc3308d10 [ 31.705821] </TASK> [ 31.706116] [ 31.706341] Allocated by task 214: [ 31.706787] kasan_save_stack+0x22/0x50 [ 31.707288] kasan_set_track+0x25/0x30 [ 31.707783] __kasan_slab_alloc+0x59/0x70 [ 31.708304] kmem_cache_alloc+0x16b/0x370 [ 31.708820] vm_area_dup+0x20/0x160 [ 31.709272] __split_vma+0x170/0x950 [ 31.709750] split_vma+0xc6/0x110 [ 31.710188] mprotect_fixup+0x8d2/0xb30 [ 31.710697] do_mprotect_pkey+0x87e/0xd40 [ 31.711224] __x64_sys_mprotect+0x78/0xc0 [ 31.711752] do_syscall_64+0x3f/0x90 [ 31.712230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.712873] [ 31.713089] Freed by task 214: [ 31.713484] kasan_save_stack+0x22/0x50 [ 31.713988] kasan_set_track+0x25/0x30 [ 31.714486] kasan_save_free_info+0x2b/0x50 [ 31.715030] __kasan_slab_free+0x10a/0x190 [ 31.715569] kmem_cache_free+0x10d/0x4d0 [ 31.716076] rcu_core+0x8c8/0x2860 [ 31.716526] __do_softirq+0x1b7/0x7d4 [ 31.717007] [ 31.717226] Last potentially related work creation: [ 31.717820] kasan_save_stack+0x22/0x50 [ 31.718324] __kasan_record_aux_stack+0x8e/0xa0 [ 31.718922] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.719559] remove_vma+0x139/0x170 [ 31.720011] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.720575] do_vmi_munmap+0x1f1/0x2b0 [ 31.721065] __vm_munmap+0x138/0x3a0 [ 31.721528] __x64_sys_munmap+0x59/0x80 [ 31.722024] do_syscall_64+0x3f/0x90 [ 31.722497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.723176] [ 31.723390] The buggy address belongs to the object at ffff8880166c6488 [ 31.723390] which belongs to the cache vm_area_struct of size 168 [ 31.724889] The buggy address is located 88 bytes inside of [ 31.724889] freed 168-byte region [ffff8880166c6488, ffff8880166c6530) [ 31.726325] [ 31.726554] The buggy address belongs to the physical page: [ 31.727240] page:000000002791686c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166c6 [ 31.728335] memcg:ffff88800e6a7401 [ 31.728762] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.729414] page_type: 0xffffffff() [ 31.729863] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.730789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6a7401 [ 31.731692] page dumped because: kasan: bad access detected [ 31.732360] [ 31.732573] Memory state around the buggy address: [ 31.733160] ffff8880166c6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.734025] ffff8880166c6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.734892] >ffff8880166c6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.735747] ^ [ 31.736511] ffff8880166c6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.737372] ffff8880166c6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.738225] ================================================================== [ 31.739448] Disabling lock debugging due to kernel taint [ 33.279503] BUG: Bad rss-counter state mm:00000000bb8a2523 type:MM_FILEPAGES val:33 [ 33.280528] BUG: Bad rss-counter state mm:00000000bb8a2523 type:MM_ANONPAGES val:22 [ 33.753218] BUG: Bad rss-counter state mm:000000000e2dede9 type:MM_FILEPAGES val:33 [ 33.754731] BUG: Bad rss-counter state mm:000000000e2dede9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12206' (ECDSA) to the list of known hosts. 2023/06/21 06:48:35 fuzzer started 2023/06/21 06:48:35 dialing manager at localhost:36067 2023/06/21 06:48:36 checking machine... 2023/06/21 06:48:36 checking revisions... [ 34.450635] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:48:36 testing simple program... [ 34.502964] cgroup: Unknown subsys name 'net' [ 34.569461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:48:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535d53 RSP=ffff88800fdcf7d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000009f8000009f8 R12=0000000000000293 R13=ffff888016cc81d0 R14=ffff888016cc8579 R15=ffff888016cc8600 RIP=ffffffff815343fe 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 00007f649b5cb900 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=00007ffdb6a3a000 CR3=000000000efda000 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=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 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=00007f1b92df9470 CR3=000000000d866000 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=2035333a38343a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a38343a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000