syzkaller login: [ 81.860984] BUG: Bad rss-counter state mm:0000000004031c1e type:MM_FILEPAGES val:33 [ 81.862184] BUG: Bad rss-counter state mm:0000000004031c1e type:MM_ANONPAGES val:22 [ 82.034420] ================================================================== [ 82.035491] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 82.036595] Read of size 8 at addr ffff88800e7ffd08 by task sshd/221 [ 82.037638] [ 82.037901] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 82.039105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 82.040111] Call Trace: [ 82.040431] [ 82.040720] dump_stack_lvl+0x91/0xf0 [ 82.041217] print_report+0xcc/0x620 [ 82.041698] ? __virt_addr_valid+0x102/0x340 [ 82.042256] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.042863] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.043470] kasan_report+0xbe/0xf0 [ 82.043942] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.044599] vma_interval_tree_remove+0xc75/0xec0 [ 82.045229] vma_prepare+0xc54/0x11a0 [ 82.045723] __split_vma+0x5af/0x950 [ 82.046224] ? __pfx___split_vma+0x10/0x10 [ 82.046776] ? find_held_lock+0x2c/0x110 [ 82.047321] do_vmi_align_munmap+0x2ba/0x11f0 [ 82.047911] ? lock_is_held_type+0x9f/0x120 [ 82.048476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 82.049115] ? mtree_range_walk+0x632/0x900 [ 82.049691] ? mas_walk+0x5c7/0x7c0 [ 82.050187] do_vmi_munmap+0x1f1/0x2b0 [ 82.050725] mmap_region+0x1f9/0x2660 [ 82.051228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 82.051759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 82.052506] ? __pfx_lock_acquire+0x10/0x10 [ 82.053069] ? __pfx_mmap_region+0x10/0x10 [ 82.053623] ? security_mmap_addr+0x7d/0xa0 [ 82.054182] ? get_unmapped_area+0x1f5/0x3f0 [ 82.054779] do_mmap+0x854/0xf00 [ 82.055242] vm_mmap_pgoff+0x1a6/0x3a0 [ 82.055750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 82.056337] ksys_mmap_pgoff+0x3af/0x500 [ 82.056862] do_syscall_64+0x3f/0x90 [ 82.057362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.058040] RIP: 0033:0x7f1381c9fd82 [ 82.058524] 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 [ 82.060785] RSP: 002b:00007ffee41e9818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 82.061735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1381c9fd82 [ 82.062653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13810d9000 [ 82.063550] RBP: 00007f13810d9000 R08: 0000000000000009 R09: 0000000000001000 [ 82.064435] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562075ec7b20 [ 82.065318] R13: 00007ffee41e9830 R14: 00007ffee41e9860 R15: 00007ffee41e9bc0 [ 82.066240] [ 82.066550] [ 82.066779] Allocated by task 214: [ 82.067229] kasan_save_stack+0x22/0x50 [ 82.067754] kasan_set_track+0x25/0x30 [ 82.068268] __kasan_slab_alloc+0x59/0x70 [ 82.068813] kmem_cache_alloc+0x16b/0x370 [ 82.069356] vm_area_dup+0x20/0x160 [ 82.069824] __split_vma+0x170/0x950 [ 82.070317] split_vma+0xc6/0x110 [ 82.070770] mprotect_fixup+0x8d2/0xb30 [ 82.071295] do_mprotect_pkey+0x87e/0xd40 [ 82.071841] __x64_sys_mprotect+0x78/0xc0 [ 82.072377] do_syscall_64+0x3f/0x90 [ 82.072874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.073540] [ 82.073769] Freed by task 214: [ 82.074171] kasan_save_stack+0x22/0x50 [ 82.074721] kasan_set_track+0x25/0x30 [ 82.075238] kasan_save_free_info+0x2b/0x50 [ 82.075788] __kasan_slab_free+0x10a/0x190 [ 82.076346] kmem_cache_free+0x10d/0x4d0 [ 82.076868] rcu_core+0x8c8/0x2860 [ 82.077323] __do_softirq+0x1b7/0x7d4 [ 82.077820] [ 82.078100] Last potentially related work creation: [ 82.078721] kasan_save_stack+0x22/0x50 [ 82.079240] __kasan_record_aux_stack+0x8e/0xa0 [ 82.079832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.080499] remove_vma+0x139/0x170 [ 82.080967] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.081557] do_vmi_munmap+0x1f1/0x2b0 [ 82.082053] __vm_munmap+0x138/0x3a0 [ 82.082545] __x64_sys_munmap+0x59/0x80 [ 82.083064] do_syscall_64+0x3f/0x90 [ 82.083549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.084205] [ 82.084429] Second to last potentially related work creation: [ 82.085147] kasan_save_stack+0x22/0x50 [ 82.085664] __kasan_record_aux_stack+0x8e/0xa0 [ 82.086268] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.086926] remove_vma+0x139/0x170 [ 82.087401] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.087978] do_vmi_munmap+0x1f1/0x2b0 [ 82.088478] __vm_munmap+0x138/0x3a0 [ 82.088962] elf_map+0x26f/0x310 [ 82.089422] load_elf_binary+0x3417/0x5030 [ 82.089977] bprm_execve+0x803/0x1940 [ 82.090467] do_execveat_common+0x734/0x8e0 [ 82.091011] __x64_sys_execve+0x93/0xc0 [ 82.091520] do_syscall_64+0x3f/0x90 [ 82.092005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.092666] [ 82.092886] The buggy address belongs to the object at ffff88800e7ffcb0 [ 82.092886] which belongs to the cache vm_area_struct of size 168 [ 82.094421] The buggy address is located 88 bytes inside of [ 82.094421] freed 168-byte region [ffff88800e7ffcb0, ffff88800e7ffd58) [ 82.095866] [ 82.096087] The buggy address belongs to the physical page: [ 82.096775] page:00000000c4cc27aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7ff [ 82.097895] memcg:ffff88800e8eb201 [ 82.098349] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 82.099069] page_type: 0xffffffff() [ 82.099541] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 82.100487] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8eb201 [ 82.101425] page dumped because: kasan: bad access detected [ 82.102118] [ 82.102352] Memory state around the buggy address: [ 82.102951] ffff88800e7ffc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 82.103845] ffff88800e7ffc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 82.104742] >ffff88800e7ffd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 82.105619] ^ [ 82.106074] ffff88800e7ffd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 82.106974] ffff88800e7ffe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 82.107858] ================================================================== [ 82.108802] Disabling lock debugging due to kernel taint [ 84.611198] BUG: Bad rss-counter state mm:00000000257b626c type:MM_FILEPAGES val:33 [ 84.612378] BUG: Bad rss-counter state mm:00000000257b626c type:MM_ANONPAGES val:22 [ 85.126012] BUG: Bad rss-counter state mm:000000009a17df9f type:MM_FILEPAGES val:33 [ 85.127134] BUG: Bad rss-counter state mm:000000009a17df9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22194' (ECDSA) to the list of known hosts. 2023/06/19 12:13:11 fuzzer started 2023/06/19 12:13:11 dialing manager at localhost:44161 2023/06/19 12:13:12 checking machine... 2023/06/19 12:13:12 checking revisions... [ 85.854128] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:13:12 testing simple program... [ 85.905780] cgroup: Unknown subsys name 'net' [ 85.942548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:12:21 Registers: info registers vcpu 0 RAX=ffff888016498001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016497d01 RSI=ffff888016497da0 RDI=ffff888016497da0 RBP=ffff8880164978a0 RSP=ffff8880164977d0 R8 =0000000000000001 R9 =ffff888016497888 R10=0000000000038001 R11=0000000000091967 R12=ffff8880164978a8 R13=ffff888016497890 R14=ffff888016497da0 R15=ffff888016497848 RIP=ffffffff8112fbf0 RFL=00000202 [-------] 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 00007f680108b900 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=00007f6801642618 CR3=000000001a1e8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f3034237d80 CR3=000000000d8a8000 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=536cc8c7b29597a3a54d34110d8dc960 XMM02=2c67c8bc2e329bc30000000000125400 XMM03=fb795ef6d6577056000000000012cd88 XMM04=ee59f350f045582a00000000000ae988 XMM05=e4cb8bb95a7664b6000000000013df30 XMM06=c291bd5c70af25b9000000000013ddb8 XMM07=e042d86d42eb936e000000000012d008 XMM08=2803bebd035b19d40000000000125460 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000