syzkaller login: [ 30.680020] BUG: Bad rss-counter state mm:00000000ec13f4fe type:MM_FILEPAGES val:33 [ 30.681820] BUG: Bad rss-counter state mm:00000000ec13f4fe type:MM_ANONPAGES val:22 [ 30.843239] ================================================================== [ 30.844175] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.845105] Read of size 8 at addr ffff88800e93bc20 by task sshd/219 [ 30.846208] [ 30.846486] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.847362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.848347] Call Trace: [ 30.848665] [ 30.848950] dump_stack_lvl+0x91/0xf0 [ 30.849486] print_report+0xcc/0x620 [ 30.849968] ? __virt_addr_valid+0x102/0x340 [ 30.850575] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851212] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851824] kasan_report+0xbe/0xf0 [ 30.852323] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852940] vma_interval_tree_remove+0xc75/0xec0 [ 30.853618] vma_prepare+0xc54/0x11a0 [ 30.854114] __split_vma+0x5af/0x950 [ 30.854585] ? __pfx___split_vma+0x10/0x10 [ 30.855129] ? find_held_lock+0x2c/0x110 [ 30.855653] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.856229] ? lock_is_held_type+0x9f/0x120 [ 30.856772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857400] ? mtree_range_walk+0x632/0x900 [ 30.857959] ? mas_walk+0x5c7/0x7c0 [ 30.858458] do_vmi_munmap+0x1f1/0x2b0 [ 30.858947] mmap_region+0x1f9/0x2660 [ 30.859452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860696] ? __pfx_lock_acquire+0x10/0x10 [ 30.861241] ? __pfx_mmap_region+0x10/0x10 [ 30.861782] ? security_mmap_addr+0x7d/0xa0 [ 30.862334] ? get_unmapped_area+0x1f5/0x3f0 [ 30.862884] do_mmap+0x854/0xf00 [ 30.863347] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.863847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.864415] ksys_mmap_pgoff+0x3af/0x500 [ 30.864922] do_syscall_64+0x3f/0x90 [ 30.865430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866090] RIP: 0033:0x7f6b0394dd82 [ 30.866544] 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 [ 30.868699] RSP: 002b:00007ffc191597e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.869636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b0394dd82 [ 30.870499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b02d87000 [ 30.871372] RBP: 00007f6b02d87000 R08: 0000000000000009 R09: 0000000000001000 [ 30.872229] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e2aa4eec0 [ 30.873089] R13: 00007ffc19159800 R14: 00007ffc19159830 R15: 00007ffc19159b90 [ 30.873949] [ 30.874254] [ 30.874468] Allocated by task 212: [ 30.874901] kasan_save_stack+0x22/0x50 [ 30.875424] kasan_set_track+0x25/0x30 [ 30.875914] __kasan_slab_alloc+0x59/0x70 [ 30.876451] kmem_cache_alloc+0x16b/0x370 [ 30.876970] vm_area_dup+0x20/0x160 [ 30.877450] __split_vma+0x170/0x950 [ 30.877924] split_vma+0xc6/0x110 [ 30.878385] mprotect_fixup+0x8d2/0xb30 [ 30.878889] do_mprotect_pkey+0x87e/0xd40 [ 30.879466] __x64_sys_mprotect+0x78/0xc0 [ 30.880001] do_syscall_64+0x3f/0x90 [ 30.880473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.881126] [ 30.881368] Freed by task 202: [ 30.881766] kasan_save_stack+0x22/0x50 [ 30.882292] kasan_set_track+0x25/0x30 [ 30.882787] kasan_save_free_info+0x2b/0x50 [ 30.883346] __kasan_slab_free+0x10a/0x190 [ 30.883883] kmem_cache_free+0x10d/0x4d0 [ 30.884406] rcu_core+0x8c8/0x2860 [ 30.884849] __do_softirq+0x1b7/0x7d4 [ 30.885350] [ 30.885568] Last potentially related work creation: [ 30.886171] kasan_save_stack+0x22/0x50 [ 30.886674] __kasan_record_aux_stack+0x8e/0xa0 [ 30.887271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.887913] remove_vma+0x139/0x170 [ 30.888372] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.888924] do_vmi_munmap+0x1f1/0x2b0 [ 30.889439] __vm_munmap+0x138/0x3a0 [ 30.889909] __x64_sys_munmap+0x59/0x80 [ 30.890411] do_syscall_64+0x3f/0x90 [ 30.890886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891545] [ 30.891759] The buggy address belongs to the object at ffff88800e93bbc8 [ 30.891759] which belongs to the cache vm_area_struct of size 168 [ 30.893249] The buggy address is located 88 bytes inside of [ 30.893249] freed 168-byte region [ffff88800e93bbc8, ffff88800e93bc70) [ 30.894690] [ 30.894905] The buggy address belongs to the physical page: [ 30.895595] page:0000000065f04e57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe93b [ 30.896692] memcg:ffff88800ced9001 [ 30.897130] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.897780] page_type: 0xffffffff() [ 30.898243] raw: 0100000000000200 ffff8880087a0c80 ffffea000060f380 dead000000000004 [ 30.899195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ced9001 [ 30.900110] page dumped because: kasan: bad access detected [ 30.900768] [ 30.900987] Memory state around the buggy address: [ 30.901579] ffff88800e93bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.902450] ffff88800e93bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.903323] >ffff88800e93bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.904211] ^ [ 30.904736] ffff88800e93bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.905618] ffff88800e93bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.906498] ================================================================== [ 30.907873] Disabling lock debugging due to kernel taint [ 33.324683] BUG: Bad rss-counter state mm:00000000e2192c7e type:MM_FILEPAGES val:33 [ 33.325715] BUG: Bad rss-counter state mm:00000000e2192c7e type:MM_ANONPAGES val:22 [ 33.880824] BUG: Bad rss-counter state mm:000000000dccd279 type:MM_FILEPAGES val:33 [ 33.882074] BUG: Bad rss-counter state mm:000000000dccd279 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4114' (ECDSA) to the list of known hosts. 2023/06/20 13:03:41 fuzzer started 2023/06/20 13:03:42 dialing manager at localhost:36067 2023/06/20 13:03:42 checking machine... 2023/06/20 13:03:42 checking revisions... [ 34.501578] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:03:42 testing simple program... [ 34.556174] cgroup: Unknown subsys name 'net' [ 34.606554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:03:41 Registers: info registers vcpu 0 RAX=0000000000000051 RBX=0000000000000050 RCX=0000557608172010 RDX=0000000000000003 RSI=00005576081732e0 RDI=00007f3348515b80 RBP=00007f3348515b80 RSP=00007fffdf3227b0 R8 =0000557608187fd0 R9 =0000000000000001 R10=0000000000000017 R11=0000557608179290 R12=00005576081732e0 R13=0000000000000000 R14=0000000000000000 R15=00005576081732f0 RIP=00007f33483dd993 RFL=00000217 [----APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3347b8c900 00000000 00000000 GS =0000 0000000000000000 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=00007f3346fb64e0 CR3=000000000c86e000 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=7e8a42789393c4b7000000000011a650 XMM01=9cbdc1b60758a39ee04ffaa649c43253 XMM02=2c67c8bc2e329bc3000000000011a990 XMM03=fb795ef6d65770560000000000121f08 XMM04=e4fcd920bb2fc09200000000000ae988 XMM05=dfcdbad4f1609c370000000000131cc8 XMM06=b3eea416b772593d0000000000130b30 XMM07=e042d86d42eb936e0000000000122188 XMM08=1df9216f3963a59b000000000011a9f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f3ff873f0b0 CR3=00000000166c8000 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=2031343a33303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33303a3331203032 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000