syzkaller login: [ 38.906044] BUG: Bad rss-counter state mm:00000000023b2312 type:MM_FILEPAGES val:33 [ 38.907203] BUG: Bad rss-counter state mm:00000000023b2312 type:MM_ANONPAGES val:22 [ 38.949080] ================================================================== [ 38.950260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.951414] Read of size 8 at addr ffff88800fbaa228 by task sshd/219 [ 38.952298] [ 38.952527] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.953568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.954696] Call Trace: [ 38.955110] <TASK> [ 38.955424] dump_stack_lvl+0x91/0xf0 [ 38.956035] print_report+0xcc/0x620 [ 38.956655] ? __virt_addr_valid+0x102/0x340 [ 38.957286] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.957989] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.958770] kasan_report+0xbe/0xf0 [ 38.959279] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.959957] vma_interval_tree_remove+0xc75/0xec0 [ 38.960630] vma_prepare+0xc54/0x11a0 [ 38.961135] __split_vma+0x5af/0x950 [ 38.961639] ? __pfx___split_vma+0x10/0x10 [ 38.962203] ? find_held_lock+0x2c/0x110 [ 38.962756] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.963360] ? lock_is_held_type+0x9f/0x120 [ 38.963961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.964610] ? mtree_range_walk+0x632/0x900 [ 38.965201] ? mas_walk+0x5c7/0x7c0 [ 38.965713] do_vmi_munmap+0x1f1/0x2b0 [ 38.966244] mmap_region+0x1f9/0x2660 [ 38.966757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.967299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.968068] ? __pfx_lock_acquire+0x10/0x10 [ 38.968633] ? __pfx_mmap_region+0x10/0x10 [ 38.969202] ? security_mmap_addr+0x7d/0xa0 [ 38.969766] ? get_unmapped_area+0x1f5/0x3f0 [ 38.970357] do_mmap+0x854/0xf00 [ 38.970823] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.971353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.971972] ksys_mmap_pgoff+0x3af/0x500 [ 38.972518] do_syscall_64+0x3f/0x90 [ 38.973030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.973723] RIP: 0033:0x7f6add63dd82 [ 38.974218] 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 [ 38.976497] RSP: 002b:00007ffeed5ef858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.977454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6add63dd82 [ 38.978354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6adca77000 [ 38.979255] RBP: 00007f6adca77000 R08: 0000000000000009 R09: 0000000000001000 [ 38.980169] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592f2bdfec0 [ 38.981078] R13: 00007ffeed5ef870 R14: 00007ffeed5ef8a0 R15: 00007ffeed5efc00 [ 38.981989] </TASK> [ 38.982303] [ 38.982532] Allocated by task 212: [ 38.982988] kasan_save_stack+0x22/0x50 [ 38.983600] kasan_set_track+0x25/0x30 [ 38.984140] __kasan_slab_alloc+0x59/0x70 [ 38.984693] kmem_cache_alloc+0x16b/0x370 [ 38.985237] vm_area_dup+0x20/0x160 [ 38.985725] __split_vma+0x170/0x950 [ 38.986218] split_vma+0xc6/0x110 [ 38.986682] mprotect_fixup+0x8d2/0xb30 [ 38.987224] do_mprotect_pkey+0x87e/0xd40 [ 38.987803] __x64_sys_mprotect+0x78/0xc0 [ 38.988354] do_syscall_64+0x3f/0x90 [ 38.988856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989550] [ 38.989780] Freed by task 212: [ 38.990199] kasan_save_stack+0x22/0x50 [ 38.990819] kasan_set_track+0x25/0x30 [ 38.991376] kasan_save_free_info+0x2b/0x50 [ 38.991964] __kasan_slab_free+0x10a/0x190 [ 38.992542] kmem_cache_free+0x10d/0x4d0 [ 38.993086] rcu_core+0x8c8/0x2860 [ 38.993553] __do_softirq+0x1b7/0x7d4 [ 38.994062] [ 38.994289] Last potentially related work creation: [ 38.994912] kasan_save_stack+0x22/0x50 [ 38.995467] __kasan_record_aux_stack+0x8e/0xa0 [ 38.996068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.996741] remove_vma+0x139/0x170 [ 38.997219] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.997803] do_vmi_munmap+0x1f1/0x2b0 [ 38.998315] __vm_munmap+0x138/0x3a0 [ 38.998807] __x64_sys_munmap+0x59/0x80 [ 38.999335] do_syscall_64+0x3f/0x90 [ 38.999847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.000524] [ 39.000750] The buggy address belongs to the object at ffff88800fbaa1d0 [ 39.000750] which belongs to the cache vm_area_struct of size 168 [ 39.002289] The buggy address is located 88 bytes inside of [ 39.002289] freed 168-byte region [ffff88800fbaa1d0, ffff88800fbaa278) [ 39.003786] [ 39.004012] The buggy address belongs to the physical page: [ 39.004707] page:000000005bbdaca5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbaa [ 39.005855] memcg:ffff88800dd69f01 [ 39.006305] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.007030] page_type: 0xffffffff() [ 39.007541] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.008553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd69f01 [ 39.009512] page dumped because: kasan: bad access detected [ 39.010221] [ 39.010450] Memory state around the buggy address: [ 39.011076] ffff88800fbaa100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.011993] ffff88800fbaa180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.012906] >ffff88800fbaa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.013818] ^ [ 39.014411] ffff88800fbaa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.015356] ffff88800fbaa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.016272] ================================================================== [ 39.017429] Disabling lock debugging due to kernel taint [ 41.376073] BUG: Bad rss-counter state mm:0000000096251f4a type:MM_FILEPAGES val:33 [ 41.377244] BUG: Bad rss-counter state mm:0000000096251f4a type:MM_ANONPAGES val:22 [ 41.778449] BUG: Bad rss-counter state mm:0000000085b75a7e type:MM_FILEPAGES val:33 [ 41.779438] BUG: Bad rss-counter state mm:0000000085b75a7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30244' (ECDSA) to the list of known hosts. 2023/06/20 23:06:29 fuzzer started 2023/06/20 23:06:29 dialing manager at localhost:36067 2023/06/20 23:06:29 checking machine... 2023/06/20 23:06:29 checking revisions... [ 42.531244] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:06:29 testing simple program... [ 42.587538] cgroup: Unknown subsys name 'net' [ 42.626022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:06:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11003210f8c RSP=ffff888019087c40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856d84b8 R13=ffffffff818088f7 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 00007f8c612fe900 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=00007f8c618b60b0 CR3=000000000ecd2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f999c13b7b0 CR3=000000000d4d0000 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=169955bd1d4295849c4c515ee885e7bd XMM02=ec2efd57dc4c00df000000000011b6d0 XMM03=3e1fc332476f12e0000000000011b7a0 XMM04=95d9deb5e95222cc00000000000ae988 XMM05=3ad2cbd000f941a30000000000132258 XMM06=4fda316b135da52b00000000001313f8 XMM07=e042d86d42eb936e0000000000121be8 XMM08=3e1fc332476f12e0000000000011b7a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000