ci2 starts bisection 2024-09-12 13:05:27.162804889 +0000 UTC m=+13917.893734138 bisecting fixing commit since 4d55129aea65ac23a34b9053f3f1ee4d92883032 building syzkaller on 9026e14289eaf45a00ddddb8730f2092b956d99a ensuring issue is reproducible on original commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 testing commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 503898297573f00924954511ff9eabe0ad2f0d30e9cb15f2b0caf89d8478aec5 all runs: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry representative crash: KASAN: use-after-free Read in __ext4_check_dir_entry, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7cdf6593d8828ce9d8b93dc58530d350d13637a6d45a67544ca7a18658ca52f3 all runs: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry representative crash: KASAN: use-after-free Read in __ext4_check_dir_entry, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed kconfig minimization: base=5179 full=6494 leaves diff=257 split chunks (needed=false): <257> split chunk #0 of len 257 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5422b3a2799f7bd6c64e62f1a3c8f945e864a44a0b6c7f2bc789820d556c758b all runs: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry representative crash: KASAN: use-after-free Read in __ext4_check_dir_entry, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ed7417c2200fa3ad81e70955155921e41b2b341e6996134e7ad18d1ae2db4c3b all runs: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry representative crash: KASAN: use-after-free Read in __ext4_check_dir_entry, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0c848a6dac3031830fa2410c45589322f017cb38954f08250bc32578368fc70d all runs: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry representative crash: KASAN: use-after-free Read in __ext4_check_dir_entry, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7c2bf43c8e3a5c090ae46764b9d5c4b51f38fb6d927484380c7e5fe61a9bed57 all runs: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry representative crash: KASAN: use-after-free Read in __ext4_check_dir_entry, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 4d55129aea65ac23a34b9053f3f1ee4d92883032 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building 4d55129aea65ac23a34b9053f3f1ee4d92883032: net/socket.c:1245: undefined reference to `wext_handle_ioctl' net/socket.c:3442: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:329: undefined reference to `wext_proc_init' net/core/net-procfs.c:345: undefined reference to `wext_proc_exit' minimized to 49 configs; suspects: [HID_ZEROPLUS USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM V4L2_ASYNC V4L2_FWNODE VIDEO_CAMERA_SENSOR WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS X86_X32_ABI ZEROPLUS_FF] disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing current HEAD b18f8bbc044f476aea4146be141bb9c5430b2a12 testing commit b18f8bbc044f476aea4146be141bb9c5430b2a12 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 72f717ca70e4d351bd902a49076fe53b0f58b57771aab48a23a70dae48837d10 all runs: crashed: KASAN: use-after-free Read in __ext4_check_dir_entry representative crash: KASAN: use-after-free Read in __ext4_check_dir_entry, types: [KASAN] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h0m22.800048095s (build: 24m26.817208974s, test: 33m17.41533019s) crash still not fixed or there were kernel test errors commit msg: ANDROID: GKI: Update symbol list for BCMSTB crash: KASAN: use-after-free Read in __ext4_check_dir_entry ================================================================== BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x3fb/0x5f0 fs/ext4/dir.c:85 Read of size 2 at addr ffff888120987003 by task syz-executor.0/357 CPU: 0 PID: 357 Comm: syz-executor.0 Not tainted 6.1.93-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x105/0x148 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report_generic.c:349 __ext4_check_dir_entry+0x3fb/0x5f0 fs/ext4/dir.c:85 ext4_readdir+0xdc1/0x2d20 fs/ext4/dir.c:258 iterate_dir+0x215/0x500 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x1af/0x3e0 fs/readdir.c:354 __x64_sys_getdents64+0x76/0x80 fs/readdir.c:354 x64_sys_call+0x5ae/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:218 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f32d0c7dd69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f32d1a990c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007f32d0dabf80 RCX: 00007f32d0c7dd69 RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007f32d0cca49e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f32d0dabf80 R15: 00007ffe3afaa448 The buggy address belongs to the physical page: page:ffffea00048261c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x120987 flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0004826208 ffff8881f723c468 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x8140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO|__GFP_CMA), pid 291, tgid 291 (syz-execprog), ts 27709619257, free_ts 28848282966 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook mm/page_alloc.c:2590 [inline] prep_new_page+0x512/0x5e0 mm/page_alloc.c:2597 get_page_from_freelist+0x288b/0x2910 mm/page_alloc.c:4425 __alloc_pages+0x39f/0x780 mm/page_alloc.c:5714 __folio_alloc+0x15/0x40 mm/page_alloc.c:5746 __folio_alloc_node include/linux/gfp.h:245 [inline] folio_alloc include/linux/gfp.h:274 [inline] alloc_page_vma include/linux/gfp.h:283 [inline] do_anonymous_page mm/memory.c:4250 [inline] handle_pte_fault mm/memory.c:5130 [inline] __handle_mm_fault mm/memory.c:5274 [inline] handle_mm_fault+0x187a/0x2550 mm/memory.c:5414 do_user_addr_fault arch/x86/mm/fault.c:1323 [inline] handle_page_fault arch/x86/mm/fault.c:1466 [inline] exc_page_fault+0x3b3/0x6d0 arch/x86/mm/fault.c:1522 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1498 [inline] free_pcp_prepare mm/page_alloc.c:1572 [inline] free_unref_page_prepare+0x794/0x7a0 mm/page_alloc.c:3498 free_unref_page_list+0xf1/0x790 mm/page_alloc.c:3646 release_pages+0xcfc/0xd50 mm/swap.c:1063 free_pages_and_swap_cache+0x68/0x80 mm/swap_state.c:315 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu mm/mmu_gather.c:261 [inline] tlb_finish_mmu+0x1ba/0x3b0 mm/mmu_gather.c:361 exit_mmap+0x3a5/0x8d0 mm/mmap.c:3348 __mmput+0x6b/0x2a0 kernel/fork.c:1298 mmput+0x2a/0xe0 kernel/fork.c:1321 exit_mm kernel/exit.c:566 [inline] do_exit+0x943/0x2470 kernel/exit.c:862 do_group_exit+0x1ba/0x290 kernel/exit.c:1025 __do_sys_exit_group kernel/exit.c:1036 [inline] __se_sys_exit_group kernel/exit.c:1034 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1034 x64_sys_call+0x610/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff888120986f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888120986f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888120987000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888120987080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888120987100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs error (device loop0): ext4_readdir:260: inode #2: block 255: comm syz-executor.0: path /root/syzkaller-testdir2612729009/syzkaller.ZMSFuB/0/file0: bad entry in directory: rec_len is smaller than minimal - offset=1023, inode=3727327232, rec_len=1, size=1024 fake=0