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SubjectNews UBSAN warnings in aacraid
Tried 4.15-rc1 on an old 32-bit HP Netserver with aacraid card. Compared 
to 4.14, there are new UBSAN warnings with timer related backtraces, so
the timespec64 change seems suspicious:

[ 12.228058] ================================================================================
[ 12.228155] UBSAN: Undefined behaviour in drivers/scsi/aacraid/commsup.c:2514:49
[ 12.228229] signed integer overflow:
[ 12.228283] 964297611 * 250 cannot be represented in type 'long int'
[ 12.228347] CPU: 1 PID: 276 Comm: aacraid Not tainted 4.15.0-rc1 #80
[ 12.228404] Hardware name: Hewlett Packard HP NetServer/HP System Board, BIOS 4.06.46 PW 06/25/2003
[ 12.228477] Call Trace:
[ 12.228560] dump_stack+0x48/0x65
[ 12.228620] ubsan_epilogue+0xe/0x40
[ 12.228677] handle_overflow+0xad/0xc0
[ 12.228754] ? del_timer_sync+0x39/0x50
[ 12.228818] ? __getnstimeofday64+0x4d/0x200
[ 12.228877] __ubsan_handle_mul_overflow+0x12/0x20
[ 12.229037] aac_command_thread+0x1243/0x1290 [aacraid]
[ 12.229109] ? pick_next_task_fair+0x27f/0x760
[ 12.229175] ? __schedule+0x1b1/0x8e0
[ 12.229245] ? wake_up_q+0xa0/0xa0
[ 12.229311] kthread+0x13d/0x1f0
[ 12.229390] ? aac_send_hosttime+0xf0/0xf0 [aacraid]
[ 12.229449] ? __kthread_create_worker+0x110/0x110
[ 12.229516] ret_from_fork+0x19/0x24
[ 12.229571] ================================================================================
[ 12.292055] ================================================================================
[ 12.292130] UBSAN: Undefined behaviour in drivers/scsi/aacraid/commsup.c:2515:7
[ 12.292200] signed integer overflow:
[ 12.292252] 1734571608 + 500000000 cannot be represented in type 'long int'
[ 12.292312] CPU: 1 PID: 276 Comm: aacraid Not tainted 4.15.0-rc1 #80
[ 12.292368] Hardware name: Hewlett Packard HP NetServer/HP System Board, BIOS 4.06.46 PW 06/25/2003
[ 12.292439] Call Trace:
[ 12.292494] dump_stack+0x48/0x65
[ 12.292550] ubsan_epilogue+0xe/0x40
[ 12.292606] handle_overflow+0xad/0xc0
[ 12.292665] ? del_timer_sync+0x39/0x50
[ 12.292722] ? __getnstimeofday64+0x4d/0x200
[ 12.292780] __ubsan_handle_add_overflow+0x12/0x20
[ 12.292861] aac_command_thread+0x1259/0x1290 [aacraid]
[ 12.292922] ? pick_next_task_fair+0x27f/0x760
[ 12.292980] ? __schedule+0x1b1/0x8e0
[ 12.293037] ? wake_up_q+0xa0/0xa0
[ 12.293094] kthread+0x13d/0x1f0
[ 12.293172] ? aac_send_hosttime+0xf0/0xf0 [aacraid]
[ 12.293231] ? __kthread_create_worker+0x110/0x110
[ 12.293289] ret_from_fork+0x19/0x24
[ 12.293345] ================================================================================


--
Meelis Roos (mroos@linux.ee)

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