ci2 starts bisection 2025-07-15 17:50:42.190789246 +0000 UTC m=+52710.809040713 bisecting fixing commit since 4032a894ccb2cf50824f8f9be583e515ec22be87 building syzkaller on 3d2f584ddab119da50e8a8d26765aa98d3b33c02 ensuring issue is reproducible on original commit 4032a894ccb2cf50824f8f9be583e515ec22be87 testing commit 4032a894ccb2cf50824f8f9be583e515ec22be87 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ecc0c3d725c7b3eb6c8ac083f8c2d8b7fe5c2208eb4582dd0dda5667433761ef all runs: crashed: UBSAN: shift-out-of-bounds in exfat_fill_super representative crash: UBSAN: shift-out-of-bounds in exfat_fill_super, types: [UBSAN] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 4032a894ccb2cf50824f8f9be583e515ec22be87 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 027fe2372079aa2c1a53a4da68c760cb6550a3824218bf387ecf5bfcc79081f6 all runs: crashed: UBSAN: shift-out-of-bounds in exfat_fill_super representative crash: UBSAN: shift-out-of-bounds in exfat_fill_super, types: [UBSAN] the bug reproduces without the instrumentation disabling configs for [atomic_sleep hang memleak bug_or_warning kasan locking], they are not needed kconfig minimization: base=4921 full=6218 leaves diff=253 split chunks (needed=false): <253> split chunk #0 of len 253 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 4032a894ccb2cf50824f8f9be583e515ec22be87 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f5d8d581a3894bd40c0902dbea8f941c5acc3cf788cc55099a692515ed9a814f all runs: crashed: UBSAN: shift-out-of-bounds in exfat_fill_super representative crash: UBSAN: shift-out-of-bounds in exfat_fill_super, types: [UBSAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit 4032a894ccb2cf50824f8f9be583e515ec22be87 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8cfd123c1f0c6840f2464714ba066b74bc5c0573ae8d1a4d3cbf249a9e3c504b all runs: crashed: UBSAN: shift-out-of-bounds in exfat_fill_super representative crash: UBSAN: shift-out-of-bounds in exfat_fill_super, types: [UBSAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit 4032a894ccb2cf50824f8f9be583e515ec22be87 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bfc39048d1936c0c7be9cd8aa6f6e6aa05f7f258c9ea3298b151cdb83a3a7725 all runs: crashed: UBSAN: shift-out-of-bounds in exfat_fill_super representative crash: UBSAN: shift-out-of-bounds in exfat_fill_super, types: [UBSAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [atomic_sleep hang memleak bug_or_warning kasan locking], they are not needed testing commit 4032a894ccb2cf50824f8f9be583e515ec22be87 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 888c095bfab98ce4f2c1e9c7cb131e1eead293472f8ab844d21a3671dfcdedc1 all runs: crashed: UBSAN: shift-out-of-bounds in exfat_fill_super representative crash: UBSAN: shift-out-of-bounds in exfat_fill_super, types: [UBSAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit 4032a894ccb2cf50824f8f9be583e515ec22be87 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 failed building 4032a894ccb2cf50824f8f9be583e515ec22be87: net/socket.c:1191: undefined reference to `wext_handle_ioctl' net/socket.c:3390: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:343: undefined reference to `wext_proc_exit' net/core/net-procfs.c:327: undefined reference to `wext_proc_init' minimized to 49 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_MBIM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A 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 USB_SERIAL_FTDI_SIO 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 USB_XHCI_PCI_RENESAS WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_ZYDAS ZEROPLUS_FF] disabling configs for [locking atomic_sleep hang memleak bug_or_warning kasan], they are not needed testing current HEAD 6b619c45dff59b8fb5abd7fa7758fb234aa06fc6 testing commit 6b619c45dff59b8fb5abd7fa7758fb234aa06fc6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 84487e6d1856ce1e5ec649fbdc2b826c5469f9b0281f4020bff673dc28ebf6ba all runs: crashed: UBSAN: shift-out-of-bounds in exfat_fill_super representative crash: UBSAN: shift-out-of-bounds in exfat_fill_super, types: [UBSAN] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h13m15.205406011s (build: 35m49.190272021s, test: 33m54.823580278s) crash still not fixed or there were kernel test errors commit msg: Merge 5.15.188 into android13-5.15-lts crash: UBSAN: shift-out-of-bounds in exfat_fill_super ======================================================= exFAT-fs (loop2): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. exFAT-fs (loop2): Medium has reported failures. Some data may be lost. ================================================================================ UBSAN: shift-out-of-bounds in fs/exfat/super.c:520:38 shift exponent 121 is too large for 32-bit type 'int' CPU: 0 PID: 458 Comm: syz.2.21 Not tainted 5.15.188-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x38/0x49 lib/dump_stack.c:106 dump_stack+0x10/0x12 lib/dump_stack.c:113 ubsan_epilogue+0x9/0x32 lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds.cold+0x6a/0x108 lib/ubsan.c:321 exfat_read_boot_sector fs/exfat/super.c:520 [inline] __exfat_fill_super fs/exfat/super.c:576 [inline] exfat_fill_super.cold+0x23d/0x4d7 fs/exfat/super.c:644 get_tree_bdev+0x175/0x270 fs/super.c:1325 exfat_get_tree+0x10/0x20 fs/exfat/super.c:716 vfs_get_tree+0x1a/0x70 fs/super.c:1530 do_new_mount fs/namespace.c:3014 [inline] path_mount+0x307/0xc20 fs/namespace.c:3344 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount fs/namespace.c:3542 [inline] __x64_sys_mount+0x103/0x140 fs/namespace.c:3542 x64_sys_call+0x50d/0x990 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f98c898010a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f98c83eee68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f98c83eeef0 RCX: 00007f98c898010a RDX: 00002000000005c0 RSI: 0000200000000240 RDI: 00007f98c83eeeb0 RBP: 00002000000005c0 R08: 00007f98c83eeef0 R09: 0000000003000050 R10: 0000000003000050 R11: 0000000000000246 R12: 0000200000000240 R13: 00007f98c83eeeb0 R14: 00000000000014fe R15: 0000200000000600 ================================================================================ exFAT-fs (loop2): unable to set blocksize 33554432 exFAT-fs (loop2): failed to read boot sector exFAT-fs (loop2): failed to recognize exfat type