syzkaller login: [ 28.718587] BUG: Bad rss-counter state mm:0000000011f085de type:MM_FILEPAGES val:33 [ 28.720675] BUG: Bad rss-counter state mm:0000000011f085de type:MM_ANONPAGES val:22 [ 28.888062] ================================================================== [ 28.889282] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.890369] Read of size 8 at addr ffff8880169eb968 by task sshd/219 [ 28.891294] [ 28.891545] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.892535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.893671] Call Trace: [ 28.894037] <TASK> [ 28.894362] dump_stack_lvl+0x91/0xf0 [ 28.894947] print_report+0xcc/0x620 [ 28.895497] ? __virt_addr_valid+0x102/0x340 [ 28.896165] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.896916] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.897646] kasan_report+0xbe/0xf0 [ 28.898199] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.898964] vma_interval_tree_remove+0xc75/0xec0 [ 28.899675] vma_prepare+0xc54/0x11a0 [ 28.900228] __split_vma+0x5af/0x950 [ 28.900797] ? __pfx___split_vma+0x10/0x10 [ 28.901405] ? find_held_lock+0x2c/0x110 [ 28.902024] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.902684] ? lock_is_held_type+0x9f/0x120 [ 28.903317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.904028] ? mtree_range_walk+0x632/0x900 [ 28.904696] ? mas_walk+0x5c7/0x7c0 [ 28.905262] do_vmi_munmap+0x1f1/0x2b0 [ 28.905865] mmap_region+0x1f9/0x2660 [ 28.906437] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.907076] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.907949] ? __pfx_lock_acquire+0x10/0x10 [ 28.908589] ? __pfx_mmap_region+0x10/0x10 [ 28.909271] ? security_mmap_addr+0x7d/0xa0 [ 28.909925] ? get_unmapped_area+0x1f5/0x3f0 [ 28.910576] do_mmap+0x854/0xf00 [ 28.911139] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.911752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.912431] ksys_mmap_pgoff+0x3af/0x500 [ 28.913069] do_syscall_64+0x3f/0x90 [ 28.913652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.914430] RIP: 0033:0x7f3499dadd82 [ 28.915023] 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 [ 28.917597] RSP: 002b:00007ffd2ce16c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.918723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3499dadd82 [ 28.919780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34991e7000 [ 28.920946] RBP: 00007f34991e7000 R08: 0000000000000009 R09: 0000000000001000 [ 28.922337] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9b792cb20 [ 28.923784] R13: 00007ffd2ce16c70 R14: 00007ffd2ce16ca0 R15: 00007ffd2ce17000 [ 28.925214] </TASK> [ 28.925589] [ 28.925892] Allocated by task 212: [ 28.926413] kasan_save_stack+0x22/0x50 [ 28.927059] kasan_set_track+0x25/0x30 [ 28.927672] __kasan_slab_alloc+0x59/0x70 [ 28.928311] kmem_cache_alloc+0x16b/0x370 [ 28.928973] vm_area_dup+0x20/0x160 [ 28.929524] __split_vma+0x170/0x950 [ 28.930170] split_vma+0xc6/0x110 [ 28.930718] mprotect_fixup+0x8d2/0xb30 [ 28.931345] do_mprotect_pkey+0x87e/0xd40 [ 28.931944] __x64_sys_mprotect+0x78/0xc0 [ 28.932470] do_syscall_64+0x3f/0x90 [ 28.932979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.933638] [ 28.933868] Freed by task 212: [ 28.934263] kasan_save_stack+0x22/0x50 [ 28.934779] kasan_set_track+0x25/0x30 [ 28.935284] kasan_save_free_info+0x2b/0x50 [ 28.935844] __kasan_slab_free+0x10a/0x190 [ 28.936376] kmem_cache_free+0x10d/0x4d0 [ 28.936911] rcu_core+0x8c8/0x2860 [ 28.937357] __do_softirq+0x1b7/0x7d4 [ 28.937858] [ 28.938080] Last potentially related work creation: [ 28.938673] kasan_save_stack+0x22/0x50 [ 28.939198] __kasan_record_aux_stack+0x8e/0xa0 [ 28.939783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.940431] remove_vma+0x139/0x170 [ 28.940914] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.941474] do_vmi_munmap+0x1f1/0x2b0 [ 28.941994] __vm_munmap+0x138/0x3a0 [ 28.942472] __x64_sys_munmap+0x59/0x80 [ 28.943013] do_syscall_64+0x3f/0x90 [ 28.943499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.944163] [ 28.944385] The buggy address belongs to the object at ffff8880169eb910 [ 28.944385] which belongs to the cache vm_area_struct of size 168 [ 28.945909] The buggy address is located 88 bytes inside of [ 28.945909] freed 168-byte region [ffff8880169eb910, ffff8880169eb9b8) [ 28.947369] [ 28.947596] The buggy address belongs to the physical page: [ 28.948293] page:000000005d9a0220 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169eb [ 28.949449] memcg:ffff888015ee4a01 [ 28.949902] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.950630] page_type: 0xffffffff() [ 28.951190] raw: 0100000000000200 ffff8880087a0c80 ffffea0000639580 0000000000000007 [ 28.952164] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ee4a01 [ 28.953129] page dumped because: kasan: bad access detected [ 28.953829] [ 28.954053] Memory state around the buggy address: [ 28.954671] ffff8880169eb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.955565] ffff8880169eb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.956461] >ffff8880169eb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.957377] ^ [ 28.958230] ffff8880169eb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.959185] ffff8880169eba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.960122] ================================================================== [ 28.961235] Disabling lock debugging due to kernel taint [ 30.961178] BUG: Bad rss-counter state mm:000000007df82433 type:MM_FILEPAGES val:33 [ 30.961735] BUG: Bad rss-counter state mm:000000007df82433 type:MM_ANONPAGES val:22 [ 31.333963] BUG: Bad rss-counter state mm:000000009a82606f type:MM_FILEPAGES val:33 [ 31.334555] BUG: Bad rss-counter state mm:000000009a82606f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52276' (ECDSA) to the list of known hosts. 2023/06/21 06:00:05 fuzzer started 2023/06/21 06:00:05 dialing manager at localhost:36067 2023/06/21 06:00:05 checking machine... 2023/06/21 06:00:05 checking revisions... [ 32.021533] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:00:06 testing simple program... [ 32.074079] cgroup: Unknown subsys name 'net' [ 32.117730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019d4ff40 RCX=ffffffff863b3584 RDX=1ffff110033a9f26 RSI=0000000000000000 RDI=ffff888019d4f930 RBP=ffff888019d4f980 RSP=ffff888019d4f8b8 R8 =ffffffff863b3588 R9 =ffff888019d4f968 R10=0000000000038001 R11=000000000008a96a R12=ffff888019d4f988 R13=ffff888019d4f970 R14=ffff888019d4ff40 R15=ffff888019d4f928 RIP=ffffffff81131c83 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 00007fc86effa900 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=00007ffd6d129000 CR3=000000001023e000 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=2035303a30303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30303a3630203132 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007f34bd8ec9b0 CR3=000000000d8b0000 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=ac51bfc91ed039bf8346c185b699e220 XMM02=2c67c8bc2e329bc3000000000011a068 XMM03=fb795ef6d657705600000000001211c0 XMM04=a1c946ec9b28444900000000000ae988 XMM05=19e9129bd510f2350000000000131890 XMM06=4fda316b135da52b0000000000131718 XMM07=e042d86d42eb936e0000000000121498 XMM08=05a00d5e0ae79826000000000011a0c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000