syzkaller login: [ 31.177265] BUG: Bad rss-counter state mm:000000004b567fca type:MM_FILEPAGES val:33 [ 31.178411] BUG: Bad rss-counter state mm:000000004b567fca type:MM_ANONPAGES val:22 [ 31.381275] ================================================================== [ 31.382211] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.383158] Read of size 8 at addr ffff888019944310 by task sshd/222 [ 31.383951] [ 31.384172] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.385216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.386193] Call Trace: [ 31.386511] [ 31.386842] dump_stack_lvl+0x91/0xf0 [ 31.387333] print_report+0xcc/0x620 [ 31.387827] ? __virt_addr_valid+0x102/0x340 [ 31.388384] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.389013] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.389660] kasan_report+0xbe/0xf0 [ 31.390136] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.390778] vma_interval_tree_remove+0xc75/0xec0 [ 31.391375] vma_prepare+0xc54/0x11a0 [ 31.391870] __split_vma+0x5af/0x950 [ 31.392340] ? __pfx___split_vma+0x10/0x10 [ 31.392888] ? find_held_lock+0x2c/0x110 [ 31.393431] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.394003] ? lock_is_held_type+0x9f/0x120 [ 31.394555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.395177] ? mtree_range_walk+0x632/0x900 [ 31.395751] ? mas_walk+0x5c7/0x7c0 [ 31.396232] do_vmi_munmap+0x1f1/0x2b0 [ 31.396737] mmap_region+0x1f9/0x2660 [ 31.397250] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.397774] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.398482] ? __pfx_lock_acquire+0x10/0x10 [ 31.399045] ? __pfx_mmap_region+0x10/0x10 [ 31.399593] ? security_mmap_addr+0x7d/0xa0 [ 31.400119] ? get_unmapped_area+0x1f5/0x3f0 [ 31.400677] do_mmap+0x854/0xf00 [ 31.401126] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.401631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.402187] ksys_mmap_pgoff+0x3af/0x500 [ 31.402721] do_syscall_64+0x3f/0x90 [ 31.403204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.403869] RIP: 0033:0x7f5332378d82 [ 31.404323] 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 [ 31.406469] RSP: 002b:00007ffe0decc788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.407384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5332378d82 [ 31.408250] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53317b2000 [ 31.409132] RBP: 00007f53317b2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.409990] R10: 0000000000000812 R11: 0000000000000206 R12: 000055deddd9bec0 [ 31.410856] R13: 00007ffe0decc7a0 R14: 00007ffe0decc7d0 R15: 00007ffe0deccb30 [ 31.411718] [ 31.412014] [ 31.412232] Allocated by task 212: [ 31.412680] kasan_save_stack+0x22/0x50 [ 31.413192] kasan_set_track+0x25/0x30 [ 31.413699] __kasan_slab_alloc+0x59/0x70 [ 31.414214] kmem_cache_alloc+0x16b/0x370 [ 31.414749] vm_area_dup+0x20/0x160 [ 31.415204] __split_vma+0x170/0x950 [ 31.415684] split_vma+0xc6/0x110 [ 31.416120] mprotect_fixup+0x8d2/0xb30 [ 31.416632] do_mprotect_pkey+0x87e/0xd40 [ 31.417169] __x64_sys_mprotect+0x78/0xc0 [ 31.417702] do_syscall_64+0x3f/0x90 [ 31.418170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418829] [ 31.419045] Freed by task 212: [ 31.419439] kasan_save_stack+0x22/0x50 [ 31.419951] kasan_set_track+0x25/0x30 [ 31.420443] kasan_save_free_info+0x2b/0x50 [ 31.420998] __kasan_slab_free+0x10a/0x190 [ 31.421556] kmem_cache_free+0x10d/0x4d0 [ 31.422065] rcu_core+0x8c8/0x2860 [ 31.422503] __do_softirq+0x1b7/0x7d4 [ 31.422994] [ 31.423211] Last potentially related work creation: [ 31.423828] kasan_save_stack+0x22/0x50 [ 31.424329] __kasan_record_aux_stack+0x8e/0xa0 [ 31.424923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.425589] remove_vma+0x139/0x170 [ 31.426043] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.426632] do_vmi_munmap+0x1f1/0x2b0 [ 31.427113] __vm_munmap+0x138/0x3a0 [ 31.427599] __x64_sys_munmap+0x59/0x80 [ 31.428097] do_syscall_64+0x3f/0x90 [ 31.428586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429244] [ 31.429455] The buggy address belongs to the object at ffff8880199442b8 [ 31.429455] which belongs to the cache vm_area_struct of size 168 [ 31.430953] The buggy address is located 88 bytes inside of [ 31.430953] freed 168-byte region [ffff8880199442b8, ffff888019944360) [ 31.432392] [ 31.432625] The buggy address belongs to the physical page: [ 31.433299] page:00000000c4573cda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19944 [ 31.434390] memcg:ffff888014508001 [ 31.434835] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.435477] page_type: 0xffffffff() [ 31.435932] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.436862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014508001 [ 31.437811] page dumped because: kasan: bad access detected [ 31.438468] [ 31.438704] Memory state around the buggy address: [ 31.439281] ffff888019944200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.440203] ffff888019944280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.441110] >ffff888019944300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.441993] ^ [ 31.442467] ffff888019944380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.443332] ffff888019944400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.444190] ================================================================== [ 31.445221] Disabling lock debugging due to kernel taint [ 33.351521] BUG: Bad rss-counter state mm:00000000468eeac9 type:MM_FILEPAGES val:33 [ 33.352485] BUG: Bad rss-counter state mm:00000000468eeac9 type:MM_ANONPAGES val:22 [ 33.852642] BUG: Bad rss-counter state mm:0000000061a87ff9 type:MM_FILEPAGES val:33 [ 33.853860] BUG: Bad rss-counter state mm:0000000061a87ff9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51437' (ECDSA) to the list of known hosts. 2023/06/19 13:31:07 fuzzer started 2023/06/19 13:31:07 dialing manager at localhost:44161 2023/06/19 13:31:07 checking machine... 2023/06/19 13:31:07 checking revisions... [ 34.565997] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:31:08 testing simple program... [ 34.606572] cgroup: Unknown subsys name 'net' [ 34.652292] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:31:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88801467b680 RSI=ffffffff814d4bc5 RDI=ffff888014787e30 RBP=0000000000000000 RSP=ffff888014787dd8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000002 R11=0000000000000000 R12=00000000000000ba R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814d00b2 RFL=00000293 [--S-A-C] 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 00007f20b5f2a900 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=00007f20b5398420 CR3=000000000e3e2000 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=66a67752a8911d863e494cb6dee3939e XMM02=000000000011be38eff9b2d0a8fce9cb XMM03=000000000011bf082c67c8bc2e329bc3 XMM04=3f3d291cf3a5f1ca00000000000ae988 XMM05=6b85192d6535ef200000000000133ad0 XMM06=4fda316b135da52b00000000001334c8 XMM07=e042d86d42eb936e0000000000123620 XMM08=8fb9c8510a61418e000000000011bf08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdc7118000 CR3=000000000e5ce000 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=2037303a31333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000